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XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
July 4 , 2003 Ver. 3
APPLICATIONS
Synchronous Step-Down DC/DC Conrollers Input Voltage Range 2.0V ~ 10V Maximum Duty Cycle Output Voltage Externally Set-up Oscillation Frequency 300kHz (Accuracy 15%) PWM, PWM/PFM Externally Selectable 100% (TYP.) Synchronous Rectification Control High Efficiency 95% (TYP.) Small MSOP-8A Packaging
GENERAL DESCRIPTION
The XC9210 is a synchronous PWM, PWM/PFM controller designed for low voltage step-down DC/DC converter applications. High efficiency is obtained through the use of a synchronous rectification topology. Efficiencies are maximised by using the low RDSon NChannel MOSFET switch which replaces the catch diode used in standard buck circuits. The operation of the XC9210 series can be switched between PWM and PWM/PFM externally using the MODE pin. In PWM/PFM mode the XC9210 automatically switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of load conditions. Output noise is reduced in PWM operation as the frequency is fixed. The XC9210 has an 0.9V (2.0%) internal voltage, and using externally connected components, the output voltage can be set freely between 0.9V to 6.0V. With an internal switching frequency of 300kHz and 180kHz (custom) smaller, low cost external components can also be used. Soft-start time is internally set to 10msec offering protection against in-rush currents during start-up and preventing voltage overshoot.
PDAs Palmtop computers Portable audios Various power supplies
FEATURES
Input Voltage Range Output Voltage Range : 2.0V ~ 10V : 0.9V ~ 6.0V Can be set freely with 0.9V (2.0%) of reference voltage supply and external components. : 300kHz 15%
Oscillation Frequency
(180kHz is available as custom) Output Current : More than 2A (VIN = 5.0V, VOUT=3.3V) Stand-By Function Package Soft-start internally set-up : 3.0A (MAX.) : MSOP-8A : 10 ms (internally set-up)
TYPICAL APPLICATION CIRCUIT Tr1:Pch MOSFET :CPH3308 L:22H CDRH125 VOUT:3.3V Tr2:Nch MOSFET :CPH3408
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs. Output Current XC9210B093K (300kHz, 3.3V)
Tr1:CPH3308, Tr2:CPH3408 L=22uH(CDRH125), CL=94uF(Tantalum)
100 90 80 70 60 50 40 30 20 10 0 0.1
CIN:47F CFB :62pF EXT1 VDD PWM CE VIN:3.3V~10V PWM CE EXT2 GND FB MODE MODE RFB :75k RFB1 :200k CL: 47FX2
Efficiency EFFI (%)
VIN=5.0V 8.0V
PWM/PFM Switching Control Synchronous PWM Control
1
10 100 1000 Output Current IOUT (mA)
10000
1
Semiconductor Ltd.
XC9210 Series
PIN CONFIGURATION
1 EXT1 2 VDD 3 PWM 4 CE EXT2 8 GND 7 FB 6 MODE 8
Synchronous Step-Down DC / DC Controller ICs
MSOP-8A (TOP VIEW)
PIN ASSIGNMENT
PIN NUMBER 1 2 3 4 PIN NAME EXT 1 / VDD PWM CE FUNCTIONS External Transistor Drive Pin Supply Voltage PWM/PFM Switching Pin Chip Enable Pin Synchronous / Non-Synchronous Rectification Switching Pin Ground External Transistor Drive Pin
5
MODE
6 7 8
FB GND EXT 2
ORDERING INFORMATION XC9210123456
DESIGNATOR SYMBOL DESCRIPTION
1 2 3 4 5 6
B 0 9 2 3 K R L
Standard FB Voltage 0.9V Switching Frequency 180kHz (custom) 300kHz Package Embossed Tape MSOP-8A Standard Feed Reverse Feed
PACKAGE INFORMATION
0.53 + 0.13 3.00 + 0.10 4.90 + 0.10 3.00 + 0.10
0~6
O
MSPO-8A
0.15 +0.08 -0.02 -
0.86 -0.10
+0.11
0.30
+0.08 -0.02
(0.65)
0.00 ~ 0.20
+0.20 1.02 -0.21
2
Semiconductor Ltd.
XC9210 Series
BLOCK DIAGRAM
Synchronous Step-Down DC / DC Controller ICs
MODE
EXT1/
Synchronous, blank logic
EXT2
Error Amp FB + -
PWM Comparator + PWM/PFM Controller PWM
VIN
CE
Vref=0.9V withSoft Start, CE
CE to internal circuit
Ramp Wave Generator, OSC
GND
ABSOLUTE MAXIMUM RATINGS Ta=25OC PARAMETER VDD Pin Voltage FB Pin Voltage CE Pin Voltage PWM Pin Voltage MODE Pin Voltage EXT1, 2 Pin Voltage EXT1, 2 Pin Current Power Dissipation Operating Ambient Temperature Storage Temperature SYMBOL VDD VFB VCE VPWM VMODE VEXT IEXT Pd Topr Tstg RATINGS - 0.3 ~ 12 - 0.3 ~ 12 - 0.3 ~ 12 - 0.3 ~ 12 - 0.3 ~ 12 - 0.3 ~ VDD + 0.3 100 150 - 40 ~ + 85 - 55 ~ +125 UNITS V V V V V V mA mW
O
C C
O
3
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
ELECTRICAL CHARACTERISTICS XC9210B093
PARAMETER Supply Voltage Maximum Input Voltage Output Voltage Range(note 1) Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency FB Voltage Minimum Operation Voltage Maximum Duty Ratio Minimum Duty Ratio PFM Duty Ratio Efficiency1 (note 2 ) Soft-Start Time EXT1 "High" ON Resistance EXT1 "Low" ON Resistance EXT2 "High" ON Resistance EXT2 "Low" ON Resistance PWM "High" Voltage PWM "Low" Voltage MODE "High" Voltage MODE "Low" Voltage CE "High" Voltage CE "Low" Voltage PWM "High" Current PWM "Low" Current MODE "High" Current MODE "Low" Current CE "High" Current CE "Low" Current FB "High" Current SYMBOL VDD VIN VOUTSET IDD1 IDD2 ISTB FOSC VFB VINmin MAXDTY MINDTY PFMDTY EFFI TSS REXTBH1 REXTBL1 REXTBH2 REXTBL2 VPWMH VPWML VMODEH VMODEL VCEH VCEL IPWMH IPWML IMODEH IMODEL ICEH ICEL IFBH CE = 0V MODE = 0V PWM=0V Same as IDD1 Same as IDD2 No Load, VPWM=0V IOUT1=300mA (note 3) VOUT x 0.95V, CE=0V0.65V CE1 = 0, EXT1= VDD - 0.4V FB = 0V, EXT1 = 0.4V EXT2 = VDD - 0.4V CE = 0V, EXT2 = VDD - 0.4V No Load No Load No Load No Load FB = 0V FB = 0V MODE = 0V MODE = 0V VIN 2.0V, MODE = 0V, IOUT=1mA FB = 0V FB = 1.0V Same as IDD1, CE = 0V Same as IDD1 VIN=3.0V, IOUT=10mA VOUT CONDITIONS (FOSC = 300kHz) MIN. 2.0 10.0 0.9 255 0.882 100 22 5.0 0.65 0.65 0.65 TYP. 65 65 300 0.900 30 96 10.0 26 19 23 19 MAX. 10.0 VIN 120 120 3.0 345 0.918 2.0 0 38 20.0 37 30 31 30 0.20 0.20 0.2 0.5 - 0.5 0.5 - 0.5 0.5 - 0.5 0.50 - 0.50 Ta=25OC TEST UNITS CIRCUIT V V V A A A kHz V V % % % % mS V V V V V V A A A A A A A A
1 1 1 2 2 2 2 3 1 2 2 4 4 4 5 5 5 5 4 4 4 4 2 2 2 2 2 2 2 2 2 2
IFBL FB = 1.0V FB "Low" Current Unless otherwise stated, VDD = 3.0V, CE = 3.0V, PWM = 3.0V, FB = 3.0V, EXT1, 2=OPEN, MODE = 3.0V, VIN=4.2V
Notes 1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
3)
Tr1 : CPH3308 Tr2 : CPH3408 L : 22H CL : 16V, 47F x 2 CIN : 16V, 47F
(SANYO) (SANYO) (SUMIDA CDRH125) (NICHICEMI Tantalum MCE Series) (NICHICEMI Tantalum MCE Series)
RFB1 : 200k RFB2 : 75k CFB : 62pF 4
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
XC9210B092
PARAMETER Supply Voltage Maximum Input Voltage Output Voltage Range(note 1) Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency FB Voltage Minimum Operation Voltage Maximum Duty Ratio Minimum Duty Ratio PFM Duty Ratio Efficiency1 (note 2) Soft-Start Time EXT1 "High" ON Resistance EXT1 "Low" ON Resistance EXT2 "High" ON Resistance EXT2 "Low" ON Resistance PWM "High" Voltage PWM "Low" Voltage MODE "High" Voltage MODE "Low" Voltage CE "High" Voltage CE "Low" Voltage PWM "High" Current PWM "Low" Current MODE "High" Current MODE "Low" Current CE "High" Current CE "Low" Current FB "High" Current SYMBOL VDD VIN VOUTSET IDD1 IDD2 ISTB FOSC VFB VINmin MAXDTY MINDTY PFMDTY EFFI TSS REXTBH1 REXTBL1 REXTBH2 REXTBL2 VPWMH VPWML VMODEH VMODEL VCEH VCEL IPWMH IPWML IMODEH IMODEL ICEH ICEL IFBH CE = 0V MODE = 0V PWM=0V Same as IDD1 Same as IDD2 No Load, VPWM=0V IOUT1=300mA (note 3) VOUT1 x 0.95V, CE=0V0.65V CE1 = 0, EXT1= VDD - 0.4V FB = 0V, EXT1 = 0.4V EXT2 = VDD - 0.4V CE = 0V, EXT2 = VDD - 0.4V No Load No Load No Load No Load FB = 0V FB = 0V MODE = 0V MODE = 0V VIN 2.0V, MODE = 0V, IOUT=1mA FB = 0V FB = 1.0V Same as IDD1, CE = 0V Same as IDD1 VIN=3.0V, IOUT=10mA CONDITIONS
(FOSC = 180kHz) MIN. TYP. 2.0 10.0 VOUT 0.9 153 0.882 100 22 5.0 0.65 0.65 0.65 45 45 180 0.900 30 96 10.0 26 19 23 19 -
MAX. 10.0 VIN 105 105 3.0 207 0.918 2.0 0 38 20.0 37 30 31 30 0.20 0.20 0.20 0.50 - 0.50 0.50 - 0.50 0.50 - 0.50 0.50 - 0.50
Ta=25OC TEST UNITS CIRCUIT V V V A A A kHz V V % % % % mS V V V V V V A A A A A A A A
1 1 1 2 2 2 2 3 1 2 2 4 4 4 5 5 5 5 4 4 4 4 2 2 2 2 2 2 2 2 2 2
FB "Low" Current IFBL FB = 1.0V Unless otherwise stated, VDD = 3.0V, CE = 3.0V, PWM = 3.0V, FB = 3.0V, EXT1,2 = OPEN, MODE = 3.0V, VIN=4.2V
Notes 1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
3)
Tr1 : CPH3308 Tr2 : CPH3408 L : 22H CL : 16V, 47F x 2 CIN : 16V, 47F
(SANYO) (SANYO) (SUMIDA CDRH125) (NICHICEMI Tantalum MCE Series) (NICHICEMI Tantalum MCE Series)
RFB1 : 200k RFB2 : 75k CFB : 62pF 5
Semiconductor Ltd.
XC9210 Series
OPERATIONAL DESCRIPTION
Synchronous Step-Down DC / DC Controller ICs
The XC9210 series are 2 channel step-down DC/DC converter controller ICs with built-in high speed, low ON resistance drivers.

The Error Amplifier is designed to monitor the output voltage and it compares the feedback voltage (FB) with the reference voltage. In response to feedback of a voltage lower than the reference voltage, the output voltage of the error amp. decreases.

This circuit generates the oscillation frequency which in turn generates the source clock.

The Ramp Wave Generator generates a saw-tooth waveform based on outputs from the Phase Shift Generator.

The PWM Comparator compares outputs from the Error Amp. and saw-tooth waveform. When the voltage from the Error Amp's output is low, the external switch will be set to ON.

This circuit generates PFM pulses. Control can be switched between PWM control and PWM/PFM automatic switching control using external signals. The PWM/PFM automatic switching mode is selected when the voltage of the PWM pin is less than 0.2V, and the control switches between PWM and PFM automatically depending on the load. As the PFM circuit generates pulses based on outputs from the PWM comparator, shifting between modes occurs smoothly. PWM control mode is selected when the voltage of the PWM pin is more than 0.65V. Noise is easily reduced with PWM control since the switching frequency is fixed. Control suited to the application can easily be selected which is useful in audio applications, for example, where traditionally, efficiencies have been sacrificed during stand-by as a result of using PWM control (due to the noise problems associated with the PFM mode in stand-by).

The Synchronous, blank logic circuit is to prevent penetraton of the transistor connected to EXT1 and EXT2. Synchronous can be switched between Synchronous rectification and Non-Synchronous rectification automatically by using external signals. When the MODE pin's voltage is 0.2V or less, the mode will be non-synchronous rectification and operations will recommence. The EXT2 pin will be kept at a lowlevel (the external N-type MOSFET will be OFF). When the MODE pin's and PWM pin's voltage is 0.65V or more, the mode will be synchronous rectification and operations will recommence.

The reference voltage, Vref (FB pin voltage)=0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please refer to page 8). To protect against inrush current, when the power is switched on, and also to protect against voltage overshoot, soft-start time is set internally to 10ms. It should be noted, however, that this circuit does not protect the load capacitor (CL) from inrush current. With the Vref voltage limited and depending upon the input to the error amps, the operation maintains a balance between the two inputs of the error amps and controls the EXT pin's ON time so that it doesn't increase more than is necessary.

This function controls the operation and shutdown of the IC. When the voltage of the CE pin is 0.2V or less, the mode will be chip disable, the channel's operations will stop. The EXT1 pin will be kept at a highlevel (the external P-type MOSFET will be OFF) and the EXT2 pin will be kept at a lowlevel (the external N-type MOSFET will be OFF). When CE pin is in a state of chip disable, current consumption will be no more than 3.0A. When the CE pin's voltage is 0.65V or more, the mode will be chip enable and operations will recommence. With soft-start, 95% of the set output voltage will be reached within 10mS (TYP) from the moment of chip enable.
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Semiconductor Ltd.
XC9210 Series
HOW TO USE
Synchronous Step-Down DC / DC Controller ICs
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of RFB11(RFB21) and RFB12(RFB22). The sum of RFB11(RFB21) and RFB12(RFB22) should normally be 1 M or less. VOUT = 0.9 x ( RFB11 + RFB12 ) / RFB12 The value of CFB1(CFB2), speed-up capacitor for phase compensation, should be fzfb= 1 / (2 x x CFB1 x RFB11) which is equal to 12kHz. Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of load capacity (CL). [Example of Calculation] [Typical Example] When RFB11 = 200k and RFB12 = 75k, VOUT1 = 0.9 x ( 200K + 75k ) / 75k = 3.3V. VOUT (V) 1.2 1.5 1.8 2.0 2.2 RFB11 (k) 110 220 220 330 390 RFB12 (k) 330 330 220 270 270 CFB1 (pF) 100 62 62 39 33 VOUT (V) 2.5 2.7 3.0 3.3 5.0 RFB11 (k) 390 360 560 200 82 RFB12 (k) 220 180 240 75 18 CFB1 (pF) 33 33 24 62 160
[External Components]
Transistor : Low Input Voltage (2.0V VIN 5.0V, IOUT 2A)
EXT1: CPH6315 (Pch MOSFET : SANYO), IRLMS6702 (Pch MOSFET : IR) EXT2: CPH3409 (Nch MOSFET : SANYO), IRLMS1902 (Pch MOSFET : IR) High Input Voltage (5.0V VIN 10.0V, IOUT 2A) EXT1: CPH3308 (Pch MOSFET : SANYO), IRLMS5703 (Pch MOSFET : IR) EXT2: CPH3408 (Nch MOSFET : SANYO), IRLMS1503 (Pch MOSFET : IR) L: CL : 22H 16V, 47F x 2 (SUMIDA CDRH125) (NICHICEMI Tantalum MCE Series) CIN : SD : 16V, 47F CMS02 (NICHICEMI Tantalum MCE Series) (TOSHIBA, Schottky Barrier Diode)
EXTERNAL COMPONENTS
COIL PART NUMBER CDR125-220 MANUFACTURER SUMIDA L VALUE (H) 22 SERIAL RATED CURRENT (A) RESISTANCE () 36m 2.8 CAPACITANCE (F) 47 W x L (mm) 12.3 x 12.3 H (mm) 6.0
INPUT / OUTPUT CAPACITANCE PART NUMBER 16MCE476MD2 MANUFACTURER NICHICHEMI VOLTAGE (V) 16.0 W x L (mm) 4.6 x 5.8 H (mm) 3.20.2
SCHOTTKY BARRIER DIODE PART NUMBER CMS02 MANUFACTURER TOSHIBA
REVERSE CURRENT FORWARD CURRENT
Vfmax (V) 0.4 (IF=3A)
Irmax (A) 0.5m (VR=30V)
W x L (mm) 2.4 x 4.7
H (mm) 0.980.1
30
3
TRANSISTOR (Pch MOSFET) PART NUMBER CPH6315 CPH3308 IRLMS6702 IRLMS5703 MANUFACTURER SANYO SANYO IR IR ABSOLUTE MAX. RATINGS VDSS (V) VGSS (V) ID (A) 10 - 20 -3 20 - 30 -4 12 - 20 - 2.3 20 - 30 - 2.3 Rds (ON) MAX.(m) 150 (VDS= - 4.0V) 140 (VDS= - 4.0V) 200 (VDS= - 4.5V) 400 (VDS= - 4.5V) Cisss typ (pF) 410 (VDC= - 10V) 560 (VDC= - 10V) 210 (VDC= - 15V) 170 (VDC= - 25V) VGS (off) (V) - 1.4 (MAX.) - 2.4 (MAX.) - 0.7 (MAX.) - 1.0 (MAX.) PKG. CPH6 CPH3 Micro6 Micro6
TRANSISTOR (Nch MOSFET) PART NUMBER CPH3409 CHP3408 IRLMS1902 IRLMS1503 MANUFACTURER SANYO SANYO IR IR ABSOLUTE MAX. RATINGS VDSS (V) VGSS (V) ID (A) 10 30 5 20 30 5 12 20 3.2 20 30 3.2 Rds (ON) MAX.(m) 42 (VDS=4.0V) 68 (VDS=4.0V) 100 (VDS=4.5V) 200 (VDS=4.5V) Cisss typ (pF) 630 (VDC= 10V) 480 (VDC= 10V) 300 (VDC= 15V) 210 (VDC= 25V) VGS (off) (V) 1.3 (MAX.) 2.4 (MAX.) 0.7 (MAX.) 1.0 (MAX.) PKG. CPH6 CPH3 Micro6 Micro6
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Semiconductor Ltd.
XC9210 Series
TEST CIRCUITS
Synchronous Step-Down DC / DC Controller ICs
Circuit 1
PNP Tr1 L Tr2:Nch MOSFET SBD CIN C FB A EXT1 VDD CIN PWM CE VIN EXT2 GND FB MODE RFB2 V CL RL RFB1 A VOUT
Circuit 2
EXT1 VDD PWM OSC 1F VDD VPWM VCE A A A CE
EXT2 GND FB MODE A A OSC
Circuit 3
Tr1:Pch MOSFET
510
2200pF
VMODE
V FB
Circuit 4
+
SBD CIN EXT1 V DD EXT2 GND FB MODE
L Tr2:Nch MOSFET
VOUT
Tr1:Pch MOSFET
L Tr2:Nch MOSFET
V OUT
A CIN A V CL RL CIN VPWM OSC VIN VCE CE EXT1 VDD PWM
SBD 200k EXT2 GND FB MODE VMODE 75k 62 p F
A
A
V CL RL
CIN
PWM CE VIN
Circuit 5
EXT1 V DD A PWM CE VEXT1 1F VDD V PWM V CE EXT2 GND FB MODE VMODE VFB V EX T2 A
Circuit 1 :
L: CL: CIN: Tr 2 : RFB : 22H (SUMIDA CDRH125) 16MCE476MD2 (NIHONCHEMICON, Tantalum Type) 16MCE476MD2 (NIHONCHEMICON, Tantalum Type) CPH3409 (SANYO) Please use by the conditions as below. RFB1 + RFB2 1M RFB1 / RFB2 = (Setting Output Voltage / 0.9) -1 CFB : fztb = 1 / (2 x x CFB x RFB1) =1kHz ~ 50kHz (12kHz usual)
PNP Tr 1 : 2SA1213 (TOSHIBA)
Circuit 2 :
L: CL: CIN: Tr 1 : Tr 2 : 22H (SUMIDA CDRH125) 16MCE476MD2 (NIHONCHEMICON, Tantalum Type) 16MCE476MD2 (NIHONCHEMICON, Tantalum Type) CPH6315 (SANYO) CPH3409 (SANYO)
Circuit 1 :
L: CL: CIN: Tr 1 : Tr 2 : 22H (SUMIDA CDRH125) 16MCE476MD2 (NIHONCHEMICON, Tantalum Type) 16MCE476MD2 (NIHONCHEMICON, Tantalum Type) CPH3308 (SANYO) CPH3409 (SANYO)
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Semiconductor Ltd.
XC9210 Series
NOTES ON USE 1. Checking for Intermittent Oscillation
Synchronous Step-Down DC / DC Controller ICs
The XC9210 series is subject to intermittent oscillation in the proximity of the maximum duty if the step-down ratio is low (e.g., from 4.2 V to 3.3 V) or a heavy load is applied where the duty ratio becomes high. Check waveforms at EXT under your operating conditions. A remedy for this problem is to raise the inductance of coil L or increase the load capacitance CL and use OS-CON for the load capacitance CL. When using OS-CON for the load capacitance and setting output voltage low, the series could produce an abnormal oscillation. In such case, please test with the actual device.
2. PWM/PFM Automatic Switching
If PWM/PFM automatic switching control is selected and the step-down ratio is high (e.g., from 10 V to 1.0 V), the control mode remains in PFM setting over the whole load range, since the duty ratio under continuous-duty condition is smaller than the PFM duty ratio of the XC9210 series. The output voltage's ripple voltage becomes substantially high under heavy load conditions, with the XC9210 series appearing to be producing an abnormal oscillation. If this operation becomes a concern, set pins PWM1 and PWM2 to High to set the control mode to PWM setting. For use under the abovementioned condition, measured data of PWM/PFM automatic switching control shown on the data sheets are available up to IOUT = 100 mA.
3. Ratings
Use the XC9210 series and peripheral components within the limits of their ratings.
4. Reverse Current
Reverse current is produced under the conditions of synchronous operation and light load (current flows from the output to the input ). If this reverse current becomes a concern, operate under synchronous rectification during heavy load conditions, or move input capacitance CIN closer to the IC to reduce the reverse current to the power supply.
Reverse Current
Lx L VOUT
VIN
CIN
EXT 1 EXT 2
CL
IC
GND
* The light load condition mentioned above means that the load current when the coil current being discontinuous at non-synchronous operation. The heavy load condition means that the load current when the coil current being continuous at non-synchronous operation. The DC/DC simulation on the TOREX website is useful to determine whether the coil current is non-synchronous or synchronous under your operating conditions. After the simulation, please test with the actual device.
IL
IL ILmax
ILmax
ILmax 0mA Reverse Current ILmin
0mA
ILmin
Coil Current When Non-Synchronous (Discontinuous Mode)
Coil Current When Synchronous
Coil Current with no reverse current
Comparison among non-synchronous operation (left), synchronous operation (center) and the coil current on a like-for-like basis. Synchronous of the current IL< 0mA becomes reverse current. To prevent the reverse current, operate in the condition of ILmin > 0mA (right).
5. Switching Method of Operational Mode / Control
PWM 'H' 'H' 'L' 'L' MODE 'H' 'L' 'H' 'L' OPERATIONAL MODE / CONTROL Synchronous, PWM Control Non-Synchronous, PWM Control Non-Synchronous, PFM / PWM Automatic Switching Control Non-Synchronous, PFM / PWM Automatic Switching Control
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Semiconductor Ltd.
XC9210 Series
6. Notes on How to Select Transistor
Synchronous Step-Down DC / DC Controller ICs
Synchronous rectification operation prepares fixed time when switching changes so that the high side PchMOSFET and the low side NchMOSFET do not oscillate simultaneously. Also it is designed to prevent the penetratation current when the both MOSFET oscillate at the same time. However, some MOSFET may oscillate simultaneously and worsen efficiency. Please select MOSFET with high Vth with small input capacity on high side PchMOSFET and the low side NchMOSFET. (When using with large current, please note that there is a tendency for ON resistance to become large when the input capacity of MOSFET is small and Vth is high.)
CH1:EXT1 CH2:EXT2 Diode Wave
CH3:Lx
TYPICAL APPLICATION CIRCUIT
Tr1:Pch MOSFET
Lx Pin
L VOUT Tr2:Nch MOSFET
SBD CIN CFB EXT2 GND FB MODE MODE RFB2 VIN RFB1
EXT1 VDD PWM CE PWM CE
CL
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Semiconductor Ltd.
XC9210 Series
!
TYPICAL PERFORMANCE CHARACTERISTCS
Synchronous Step-Down DC / DC Controller ICs
(1) Output Voltage vs. Output Current FOSC=300kHz, VOUT=1.2V
1.4
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
Synchronous PWM Control PWM/PFM Switching Control
FOSC=300kHz, VOUT=1.2V
1.4
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
Synchronous PWM Control PWM/PFM Switching Control
Output Voltage VOUT (V)
Output Voltage VOUT (V)
1.3
1.3
8.0V 10.0V
1.2
1.2
1.1 VIN=2.7V,3.3V,4.2V 1.0
1.1 VIN=4.2V 5.0V 1.0
0.9 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0.9 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
2.0 Output Voltage VOUT (V) 1.9 1.8 1.7 1.6 1.5 0.1 1
2.0 Output Voltage VOUT (V)
Synchronous PWM Control PWM/PFM Switching Control
4.2V
1.9 1.8 1.7
Synchronous PWM Control PWM/PFM Switching Control
8.0V 10.0V
VIN=4.2V 5.0V 1.6 1.5
VIN=2.7V 3.3V
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current IOUT (mA)
Output Current IOUT (mA)
FOSC=300kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
3.5 Output Voltage VOUT (V) Output Voltage VOUT (V) 3.4 3.3 3.2 VIN=4.2V 5.0V 8.0V 10.0V 3.1 3.0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
Synchronous PWM Control PWM/PFM Switching Control
5.2 5.1 5.0 4.9 4.8 4.7 0.1 1 10 100 1000 10000 Output Current IOUT (mA) VIN=8.0V 10.0V
Synchronous PWM Control PWM/PFM Switching Control
* Dotted arrow 11
PWM/PFM Switching Control Only
Semiconductor Ltd.
XC9210 Series
(1) Output Voltage vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=300kHz, VOUT=1.2V
1.4
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS6702, Tr2:IRLMS1902
Synchronous PWM Control PWM/PFM Switching Control
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS5703, Tr2:IRLMS1503
5.2 Output Voltage VOUT (V) 5.1 5.0 4.9 4.8 4.7 VIN=8.0V 10.0V
Synchronous PWM Control PWM/PFM Switching Control
Output Voltage VOUT (V)
1.3
1.2
1.1 VIN=2.7V,3.3V,4.2V 1.0
0.9 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0.1
1
10
100
1000
10000
Output Current IOUT (mA)
FOSC=180kHz, VOUT=1.2V FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409 L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
1.4 Output Voltage VOUT (V) 1.3 1.2 1.1 1.0 0.9 VIN=4.2V 5.0V
Synchronous PWM Control PWM/PFM Switching Control
1.4 Output Voltage VOUT (V) 1.3 1.2 1.1 VIN=2.7V 3.3V 4.2V 1.0 0.9 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
Synchronous PWM Control PWM/PFM Switching Control
0.1
1
10
100
1000
10000
Output Current IOUT (mA)
FOSC=180kHz, VOUT=1.8V FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409 L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
2.0 Output Voltage VOUT (V) 1.9 1.8 1.7 VIN=4.2V 5.0V 1.6 1.5 0.1 1 10 100 1000 10000
Synchronous PWM Control PWM/PFM Switching Control
2.0 Output Voltage VOUT (V) 1.9 1.8 1.7 1.6
Synchronous PWM Control PWM/PFM Switching Control
4.2V
VIN=2.7V 3.3V
1.5 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
Output Current IOUT (mA)
* Dotted arrow 12
PWM/PFM Switching Control Only
Semiconductor Ltd.
XC9210 Series
(1) Output Voltage vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
3.5 Output Voltage VOUT (V) 3.4 3.3 3.2 3.1 3.0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
Synchronous PWM Control PWM/PFM Switching Control
VIN=4.2V 5.0V
13
Semiconductor Ltd.
XC9210 Series
(2) Efficiency vs. Output Current
Synchronous Step-Down DC / DC Controller ICs
FOSC=300kHz, VOUT=1.2V
100 90 Efficiency EFFI (%)
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
Synchronous PWM Control
FOSC=300kHz, VOUT=1.2V
100 80 Efficiency EFFI (%) 60 4.2V 40 20
PWM/PFM Switching Control
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
3.3V
80 4.2V 70 VIN=2.7V 60 50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
VIN=2.7V
3.3V
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
5.0V 80 Efficiency EFFI (%)
5.0V
90 Efficiency EFFI (%) VIN=4.2V 80 70 8.0V 10.0V
VIN=4.2V
60 40 20 0 8.0V 10.0V
60 50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0.1
1
10
100
1000
10000
Output Current IOUT (mA)
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100 3.3V 80 Efficiency EFFI (%) VIN=2.7V 60 40 20 0 0.1 1 10 100 1000 10000 0.1 1 10 100 1000 10000 Output Current IOUT (mA) Output Current IOUT (mA) 4.2V 3.3V
PWM/PFM Switching Control
90 Efficiency EFFI (%) 80 70 60 50
4.2V VIN=2.7V
14
Semiconductor Ltd.
XC9210 Series
(2) Efficiency vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Swtching Control
90 Efficiency EFFI (%) 80
VIN=4.2V Efficiency EFFI (%)
80 5.0V 60 8.0V 40 10.0V VIN=4.2V
5.0V 8.0V
10.0V
70 60 50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
20 0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
90 Efficiency EFFI (%)
5.0V 80
Efficiency EFFI (%)
VIN=4.2V 8.0V
10.0V
80 5.0V 60 VIN=4.2V 8.0V
10.0
70
40
60
20
PWM/PFM Switching Control
50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
90 Efficiency EFFI (%) 80
Efficiency EFFI (%)
10.0V VIN=8.0V
80 8.0V 60 40
10.0V
70 60 50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
20 0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
15
Semiconductor Ltd.
XC9210 Series
(2) Efficiency vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=300kHz, VOUT=1.2V
100 90 Efficiency EFFI (%) 80 70 60 50 0.1 1 10 100 1000 10000 Output Current IOUT (mA) VIN=2.7V 4.2V Efficiency EFFI (%)
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS6702, Tr2:IRLMS1902
Synchronous PWM Control
FOSC=300kHz, VOUT=1.2V
100 80 60 3.3V 40 20
PWM/PFM Switching Control
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS6702, Tr2:IRLMS1902
3.3V
VIN=2.7V
4.2V
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS5703, Tr2:IRLMS1503
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS5703, Tr2:IRLNS1503
100
Synchronous PWM Control
100 80 VIN=8.0V Efficiency EFFI (%) VIN=8.0V
90 Efficiency EFFI (%) 80
10.0V
10.0V
60 40
70 60 50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
PWM/PFM Switching Control
20 0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100 3.3V 80 4.2V VIN=2.7V Efficiency EFFI (%) 60 4.2V 40 20 0 0.1 1 10 100 1000 10000 0.1 1 10 100 1000 10000 Output Current IOUT (mA) Output Current IOUT (mA) VIN=2.7V
PWM/PFM Switching Control
90 Efficiency EFFI (%) 80 70 60 50
3.3V
16
Semiconductor Ltd.
XC9210 Series
(2) Efficiency vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
90 Efficiency EFFI (%) 80 70 60 50 0.1 1
5.0V
Efficiency EFFI (%)
VIN=4.2V
80 60 VIN=4.2V 40 20 0
5.0V
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current IOUT (mA)
Output Current IOUT (mA)
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100 80 Efficiency EFFI (%) 3.3V VIN=2.7V 3.3V 60 40 20 0 0.1 1 10 100 1000 10000 0.1 1 10 100 1000 10000 Output Current IOUT (mA) Output Current IOUT (mA)
PWM/PFM Switching Control
90 Efficiency EFFI (%) 80
VIN=2.7V
4.2V
4.2V 70 60 50
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
90 Efficiency EFFI (%) VIN=4.2V 80 5.0V Efficiency EFFI (%)
80 VIN=4.2V 5.0V
60
70
40
60
20
50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
17
Semiconductor Ltd.
XC9210 Series
(2) Efficiency vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
90 Efficiency EFFI (%)
5.0V Efficiency EFFI (%)
80 8.0V 10.0V 5.0V 40
80
VIN=4.2V
10.0V 8.0V
60
VIN=4.2V
70
60
20
PWM/PFM Switching Control
50 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
18
Semiconductor Ltd.
XC9210 Series
(3) Ripple Voltage vs. Output Current
Synchronous Step-Down DC / DC Controller ICs
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60
60
40
4.2V
VIN=2.7V 3.3V
40
4.2V
VIN=2.7V
3.3V
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80 10.0V 60 VIN=4.2V 40 5.0V 8.0V
60
40 VIN=4.2V 5.0V 20 8.0V 10.0V
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60
60
40 VIN=2.7V 20 3.3V 4.2V
40 VIN= 2.7V 20 3.3V
4.2V
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
19
Semiconductor Ltd.
XC9210 Series
(3) Ripple Voltage vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60 10.0V
60 VIN=4.2V
5.0V 8.0V
10.0V
40
VIN=4.2V
5.0V
8.0V
40
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80 8.0V 10.0V
60 VIN=4.2V 40
5.0V
8.0V
10.0V
60
VIN=4.2V 5.0V
40
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60 VIN=8.0V 40
10.0V
60 VIN=8.0V 40
10.0V
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
20
Semiconductor Ltd.
XC9210 Series
(3) Ripple Voltage vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS6702, Tr2:IRLMS1902
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS6702, Tr2:IRLMS1902
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80 VIN=2.7V 3.3V 4.2V
60 VIN=2.7V 3.3V 4.2V
60
40
40
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS5703, Tr2:IRLMS1503
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:IRLMS5703, Tr2:IRLMS1503
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60
VIN=8.0V
10.0V
60
VIN=8.0V
10.0V
40
40
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV)
60
Ripple Voltage (mV)
VIN=2.7V 3.3V 4.2V
80
60 4.2V 40 VIN= 2.7V 3.3V
40
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
21
Semiconductor Ltd.
XC9210 Series
(3) Ripple Voltage vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) VIN=4.2V 5.0V 60 Ripple Voltage (mV)
80
60 VIN=4.2V 40
5.0V
40
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60 4.2V 3.3V
60 3.3V
40
VIN=2.7V
40
VIN= 2.7V
4.2V
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60 VIN=4.2V 40 5.0V
60 VIN=4.2V
5.0V
40
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
22
Semiconductor Ltd.
XC9210 Series
(3) Ripple Voltage vs. Output Current (Continued)
Synchronous Step-Down DC / DC Controller ICs
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH3308, Tr2:CPH3408
100
Synchronous PWM Control
100
PWM/PFM Switching Control
80 Ripple Voltage (mV) Ripple Voltage (mV)
80
60 VIN=4.2V 40 5.0V 8.0V 10.0V
60 5.0V 40 VIN=4.2V 8.0V 10.0V
20
20
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
(4) Breakdown of Coil Inductance Value
FOSC=300kHz, VIN=5.0V VOUT=3.3V
L=CDRH125, CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
FOSC=300Hz, VIN=5.0V VOUT=3.3V
L=CDRH125, CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100 10uH 80 Ripple Voltage (mV) 22uH 68uH 40 10uH
Synchronous PWM Control
95 Efficiency EFFI (%)
22uH
90
60
85
68uH
80
20
75 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
0 0.1 1 10 100 1000 10000 Output Current IOUT (mA)
23
Semiconductor Ltd.
XC9210 Series
(5) Supply Current 1 vs. Supply Voltage
Synchronous Step-Down DC / DC Controller ICs
(6) Supply Current 2 vs. Supply Voltage
XC9210B093(300kHz)
250 Supply Current IDD1 (uA) 200 150 100 50 0 0 2 4 6 8 10 Supply Voltage VDD (V) Topr=85OC 25OC - 40OC 250 Supply Current IDD2 (uA) 200 150 100 50 0 0
XC9210B093(300kHz)
Topr=85OC 25OC - 40OC
2
4
6
8
10
Supply Voltage VDD (V)
(7) Standby Current vs Supply Voltage
(8) Softstart Time vs. Supply Voltage
XC9210B093(300kHz)
Standby Current ISTB (uA) Topr=85 C 25OC - 40OC
O
XC9210B093 (300kHz)
Soft start time TSS (msec) 25 20 15 10 5 0 0 2 4 6 8 10 Supply Voltage VDD (V)
10 8 6 4 2 0 0 2 4 6 8 10 Supply Voltage VDD (V)
(10) CE 'H' 'L' Voltage vs. Supply Voltage
(11) PWM 'H' 'L' Voltage vs. Supply Voltage
XC9210B093 (300kHz)
CE 'H' 'L' Voltage VCE (V) 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 Supply Voltage VDD (V) Topr=25 C
O
XC9210B093 (300kHz)
PWM 'H' 'L' Voltage VPWM (V) 0.8 0.6 0.4 85OC 0.2 0 0 2 4 6 8 10 Supply Voltage VDD (V) Topr=25 C
O
- 40OC
- 40OC
85OC
(12) MODE 'H' 'L' Voltage vs. Supply Voltage
(13) Oscillation Frequency vs. Supply Voltage
XC9210B093 (300kHz)
MODE 'H' 'L' Voltage VMODE (V) 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 Supply Voltage VDD (V) 85OC Topr=25OC - 40OC Oscillation Frequency Fosc (kHz)
XC9210B093(300kHz)
360 330 85OC 300 270 240 0 2 Topr=25OC - 40OC 4 6 8 10
Supply Voltage VDD (V)
24
Semiconductor Ltd.
XC9210 Series
(14) EXT 1 H ON Resistance vs. Supply Voltage
Synchronous Step-Down DC / DC Controller ICs
(15) EXT L ON Resisntace vs. Supply Voltage
XC9210B093(300kHz)
EXT1 'H' ON Resistance EXT1 H ON Resistance () EXT1 L ON Resistance () 80 60 40 20 0 0 2 4 6 8 10 Supply Voltage VDD (V) Topr=85OC 25OC - 40OC 80 60 40 20 0 0
XC9210B093(300kHz)
EXT1 'L' ON Resistance
Topr=85OC 25OC - 40OC
2
4
6
8
10
Supply Voltage VDD (V)
(16) EXT2 H ON Resistance vs. Supply Voltage
(17) EXT2 L ON Resistance vs. Supply Voltage
XC9210B093(300kHz)
EXT2 'H' ON Resistance EXT2 H ON Resistance () EXT2 L ON Resistance () 80 60 40 20 0 0 2 4 6 8 10 Supply Voltage VDD (V) Topr=85OC 25OC - 40OC 80 60 40 20 0 0
XC9210B093(300kHz)
EXT2 'L' ON Resistance
Topr=85OC 25OC - 40OC
2
4
6
8
10
Supply Voltage VDD (V)
(18) Output Voltage vs. Ambient Temperature 1
(19) Output Voltage vs. Ambient Temperature 2
XC9210B093(300kHz)
3.5 Output Voltage VOUT (V) 3.4 3.3 3.2 3.1 3.0 -50 -20 10 40 70 100 Ambient Temperature Ta ( OC) VIN=5.0V IOUT=200mA
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
XC9210B093(300kHz)
1.1 Output Voltage VOUT (V) 1.0 0.9 0.8 0.7 0.6 -50 -20 10 40 70
O
L=22uH(CDRH125), CL=94uF(Tantalum) Tr1:CPH6315, Tr2:CPH3409
VIN=3.3V IOUT=200mA
100
Ambient Temperature Ta ( C)
(20) PFM Duty Ratio vs. Supply Voltage
XC9210B093(300kHz)
40 PFM Duty Ratio (%) 35 30 25 20 0 2 4 6 8 10 Supply Voltage VDD (V) Topr=85OC 25OC - 40OC
25
Semiconductor Ltd.
XC9210 Series
LOAD TRANSIENT RESPONSE < VOUT = 3.3 V, VIN = 5.0V
Synchronous PWM Control FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA 100A
Synchronous Step-Down DC / DC Controller ICs
IOUT = 100A
300mA >
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 100A 300mA
3.3V CH1 CH1 3.3V
300mA
300mA
CH2 20sec/div CH1:VOUT, AC-COUPLED,20mV/div CH2:IOUT, 150mA/div PWM Control FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA 100A
100A
CH2 20sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
100A
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 100A 300mA
CH1 CH1 3.3V
3.3V
300mA
300mA
CH2 20msec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 150mA/div PWM/PFM Switching Control FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA 100A
100A
CH2 20sec/div CH1:VOUT, AC-COUPLED, 100mV/div CH2:IOUT, 150mA/div
100A
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 100A 300mA
CH1
3.3V
CH1
3.3V
300mA
300mA
CH2 20msec/div CH1:VOUT, AC-COUPLED, 100mV/div CH2:IOUT, 150mA/div
100A
CH2 20sec/div CH1:VOUT, AC-COUPLED, 100mV/div CH2:IOUT, 150mA/div
100A
26
Semiconductor Ltd.
XC9210 Series
< VOUT = 3.3 V, VIN = 5.0V
Synchronous PWM Control
Synchronous Step-Down DC / DC Controller ICs
IOUT = 10mA
300mA >
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA 10mA
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 10mA 300mA
3.3V CH1
CH1
3.3V
300mA
300mA
CH2 20sec/div CH1:VOUT, AC-COUPLED,20mV/div CH2:IOUT, 150mA/div PWM Control FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA 10mA
10mA
CH2 10sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
10mA
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 10mA 300mA
CH1
3.3V
CH1
3.3V
300mA
300mA
CH2
10mA 400sec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 150mA/div
CH2 200sec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 150mA/div
10mA
PWM/PFM Switching Control FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA 10mA FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 10mA 300mA
CH1
3.3V
CH1
3.3V
300mA
300mA
CH2 200sec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 150mA/div
10mA
CH2 200sec/div CH1:VOUT, AC-COUPLED, 100mV/div CH2:IOUT, 150mA/div
10mA
27
Semiconductor Ltd.
XC9210 Series
< VOUT = 3.3 V, VIN = 5.0V
Synchronous PWM Control
Synchronous Step-Down DC / DC Controller ICs
IOUT = 100A
1000mA >
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 1000mA 100A
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 100A 1000mA
CH1 CH1 3.3V 3.3V
1000mA
1000mA
CH2 20sec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 500mA/div
100A
CH2 10sec/div
100A
CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 500mA/div
< VOUT = 3.3 V, VIN = 5.0V
Synchronus PWM Control
IOUT = 10mA
1000mA >
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 1000mA 10mA
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 10mA 1000mA
CH1 CH1 3.3V 3.3V
1000mA
1000mA
CH2 10sec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 500mA/div
10mA
CH2 10sec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 500mA/div
10mA
28
Semiconductor Ltd.
XC9210 Series
< VOUT = 0.9 V, VIN = 3.3V
Synchronous PWM Control FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 300mA 100A
Synchronous Step-Down DC / DC Controller ICs
IOUT = 100A
300mA >
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 100A 300mA
CH1
0.9V
CH1
0.9V
300mA
300mA
CH2 10sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div PWM Control FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 300mA 100A
100A
CH2 20sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
100A
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 100A 300mA
CH1
0.9V
CH1
0.9V
300mA 100A CH2 4msec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div PWM/PFM Switching Control FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 300mA 100A FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 100A 300mA CH2 200sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
300mA
100A
CH1
0.9V
CH1
0.9V
300mA 100A CH2 10msec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div CH2 200sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
300mA 100A
29
Semiconductor Ltd.
XC9210 Series
< VOUT = 0.9 V, VIN = 3.3V
Synchronous PWM Control
Synchronous Step-Down DC / DC Controller ICs
IOUT = 10mA
300mA >
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 300mA 10mA
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 10mA 300mA
CH1
0.9V
CH1
0.9V
300mA
300mA
CH2 10sec/div CH1:VOUT, AC-COUPLED,20mV/div CH2:IOUT, 150mA/div PWM Control FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 300mA 10mA
10mA
CH2 20sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
10mA
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 10mA 300mA
CH1
0.9V
CH1
0.9V
300mA
300mA
CH2
10mA 200sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
CH2 100sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
10mA
PWM/PFM Switching Control FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 300mA 10mA FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 10mA 300mA
CH1 CH1 0.9V
0.9V
300mA
300mA
CH2
10mA 200sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
CH2 100sec/div CH1:VOUT, AC-COUPLED, 20mV/div CH2:IOUT, 150mA/div
10mA
30
Semiconductor Ltd.
XC9210 Series
< VOUT = 0.9 V, VIN = 3.3V
Synchronous PWM Control
Synchronous Step-Down DC / DC Controller ICs
IOUT = 100A
1000mA >
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 1000mA 100A
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 100A 1000mA
CH1
0.9V
CH1
0.9V
1000mA
1000mA
CH2 20sec/div CH1:VOUT, AC-COUPLED, 100mV/div CH2:IOUT, 500mA/div
100A
CH2 10sec/div CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 500mA/div
100A
< VOUT = 0.9 V, VIN = 3.3V
Synchronous PWM Control
IOUT = 10mA
1000mA >
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 1000mA 10mA
FOSC = 300kHz, VOUT = 0.9V VIN = 3.3V, IOUT = 10mA 1000mA
CH1
0.9V
CH1
0.9V
1000mA 1000mA 10mA
CH2
10mA 20sec/div CH1:VOUT, AC-COUPLED, 100mV/div CH2:IOUT, 500mA/div
CH2 10s/ecdiv CH1:VOUT, AC-COUPLED, 50mV/div CH2:IOUT, 500mA/div
31
Semiconductor Ltd.
XC9210 Series
< PWM Control Synchronous PWM Control>
Synchronous Step-Down DC / DC Controller ICs
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA MODE 'H'
'L'
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA MODE 'L'
'H'
CH1
3.3V
CH1
3.3V
0.65V CH2 20sec/div CH1:VOUT , AC-COUPLED ,20mV/div CH2:MODE , 0.5V/div 0V CH2
0.65V 0V
20sec/div CH1:VOUT, AC-COUPLED ,20mV/div CH2:MODE, 0.5V/div
< PWM Control
PWM / PFM Switching Control>
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 1mA PWM 'H' 'L'
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 1mA PWM 'L' 'H'
CH1
CH1 3.3V
3.3V
0.65V CH2 1msec/div CH1:VOUT , AC-COUPLED ,10mV/div CH2:PWM , 0.5V/div 0V CH2
0.65V 0V 1msec/div CH1:VOUT, AC-COUPLED ,10mV/div CH2:PWM, 0.5V/div
< Softstart Wave Form >
FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 300mA CE 'H' 'L' CIN=100F FOSC = 300kHz, VOUT = 3.3V VIN = 5.0V, IOUT = 1000mA CE 'L' CIN=100F 'H'
3.3V
3.3V
CH1 200mA
CH1
700mA CH2 0.65V CH3 4ms/div CH1:VOUT , DC-COUPLED , 2.0V/div CH2:IIN, 100mA/div CH3:CE , 0.5V/div CH3 4ms/div CH1:VOUT , DC-COUPLED , 2.0V/div CH2:IIN, 500mA/div CH3:CE , 0.5V/div CH2 0.65V
32
Semiconductor Ltd.

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