View XC9107D_1337680.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

XC9106 / 07 Series
Preliminary
Externally Applied Reference Voltage (Vref) Ceramic Capacitors Compatible Input Voltage Range: 0.9V~10.0V Oscillation Frequency: 300kHz, 100kHz (15%) PWM Control (XC9106) PWM/PFM Automatic Switching Control (XC9107) SOT-25 / USP-6B Package
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref) May 23, 2002 Ver. 1-1
Applications Power Supply for LCD PDAs Cellular Phones Palmtop Computers Portable Audio Systems Various Multi-function Power Supplies
General Description
The XC9106 / 07 series are step-up DC/DC controller ICs with an externally applied reference voltage (Vref). Output voltage will be set with external resistors (RFB1 and 2) and Vref value. The series make it easy to control output voltage externally and are suited to software applications that need to vary voltage, such as LCD power supply for PDA. Output will be stable no matter which load capacitors are used but if a low ESR capacitor is used, RSENSE of about 0.1 will be required and phase compensation will be achieved. This makes the use of ceramic capacitors much easier, and allows for lower output ripple and reduced PCB area requirements. Tantalum and electrolytic capacitors can also be used, in which case, RSENSE becomes unnecessary. Oscillation frequencies of high clock, low ripple 300kHz and low supply current 100kHz are available. The XC9107 series are PWM/PFM automatic switching controlled. Control switches from PWM to PFM during light loads with the XC9107 and the series is highly efficient from light loads to large output currents. By bringing the whole circuit down while the series is in the stand-by mode (CE/PWM pin : low), supply current can be reduced to less than 1.0A.
Features
Input Voltage Range: VREF Input Range: Output Voltage: Oscillation Frequency: Output Current:
0.9V ~ 10.0V 0.8V ~ 2.5V (2.0%) Vref x external split resistor ratio VOUT=Vref x (RFB1+RFB2)/RFB2 300kHz, 100kHz 15% more than 30mA (VIN=3.3V, VOUT=20V, when peripheral components are used as in the circuits below .) PWM (XC9106) PWM/PFM auto-switching (XC9107) 85% (TYP.) ISTB=1.0A (MAX.) Low ESR capacitors compatible SOT-25, USP-6B
Power Supply Voltage Range: 1.8V ~ 10.0V and more than Vref+0.7V
Controls: High Efficiency: Stand-by Current: Load Capacitors: Packages:
Typical Application Circuit
Electrical Characteristics
XC9107D003MR 30 L : 10H VOUT (V) 25 20 15 10 5 0 CIN VIN = 3.3V 0.0 0.5 1.0 Nch Power MOS FET 2SK2159 1.5 2.0 Vref (V) 2.5 3.0 Circuit as left VDD=VIN=3.3V, IOUT=30mA
RSENSE : 100m for Ceramic CL SD : MA737 * CFB : 27pF VOUT = 8V~25V RFB1 : IOUT = 30mA 270k RFB2 : 30k
Ceramic CL : 10F
1 2 3 CE/Vref
5
XC9107D003MR 30 25 VOUT (V) 20 15 10 5 0 0.1 1
Circuit as left VDD=VIN=3.3V
4
0.8V~2.5V D/A converter
2.5V 2.0V 1.5V Vref=0.8V 10 IOUT (mA) 100 1000
* RSENSE is of no use in light load (uncontinuous mode) applications such as a small LCD, even using ceramic capacitor.
1
XC9106 / 07 Series
Preliminary
Pin Configuration
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Pin Assignment
PIN NUMBER
PIN FB VDD CE/ Vref GND EXT NC
SOT-25 USP-6B NAME
FUNCTION Output Resistor Connection Supply Voltage Serves as both Chip Enable pin and Reference Voltage Apply pin. Ground External Transistor Connection No Connection
5
4
1 2 3 6 5 4
1 2 3 4 5 -
6 2 4 3 1 5
1
2
3
SOT-25 (TOP VIEW)
USP-6B (TOP VIEW)
Ordering Information XC9106D12345
XC9106 Series: PWM Control
XC9107D12345
XC9107 Series: PWM/PFM automatic switching control (Ordering information is the same as XC9106 Series)
12 3 4 5
3 1 M D R L
Reference Voltage (apply external) Fixed : 00 Oscillation Frequency: 300kHz 100kHz Package: SOT-25 (1 reel = 3000 pcs.) USP-6B (1 reel = 3000 pcs.) Standard Feed Reverse Feed
Embossed Tape:
Block Diagram
FB Current Ripple Detect and FB Phase Compensation VDD
PWM Comparator Error Amp. Vref with Soft Start, CE CE / Vref PWM/PFM Controller Ramp Wave Generator, OSC
Buffer, Driver
EXT
GND
FB, CE : CMOS INPUT EXT : CMOS OUTPUT
Absolute Maximum Ratings
PARAMETER VDD pin Voltage FB pin Voltage CE / Vref pin Voltage EXT pin Voltage EXT pin Current Power Dissipation Operating Ambient Temperature Storage Temperature SYMBOL VDD FB VCE / Vref VEXT IEXT/ Pd
SOT-25
USP-6B
RATINGS -0.3 ~ 12.0 -0.3 ~ 12.0 -0.3 ~ 12.0 -0.3 ~ VDD + 0.3 100 150 100 -40 ~ +85 -55 ~ +125 2
Ta = 25OC UNITS V V V V mA mW
O O
Topr Tstg
C C
XC9106 / 07 Series
Preliminary
Electrical Characteristics
XC9106D001MR, XC9107D001MR PARAMETER Output Voltage Reference Voltage Range FB Control Voltage *1 *1
Power Supply Voltage Range
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=100 (kHz) MIN. 8.820 0.8 0.882 Vref = 0.9V VDD as shown right or (Vref applied voltage + 0.7V) 1.8 CONDITIONS Vref = 0.9V
Recommended Circuit using 2SD1628, IOUT=1.0mA
Ta=25OC TYP. 9.000 0.900 MAX. 9.180 2.5 0.918 10.0 0.9 0.8 0.7 41 19 1.0 115 87 36 20.0 0.20 36 24 2.5 -0.1 0.1 -0.1 UNITS V V V V V V V A A A KHz % % % mS V V A A A A Circuit
Operation Start Voltage Oscillation Start Voltage
SYMBOL VOUT Vref VFB VDD VST1 VST2
1 4 3 4 3 4 4 5 4 4 1 1 1 5 5 4 4 5 5 5 5
No external connections CE/Vref=0.9V, Voltage applied, FB=0V 29 14 85 75 20 5.0 0.65 100 81 28 85 10.0
VHLD Operation Holding Voltage Recommended Circuit using 2SD1628, IOUT=1.0mA IDD1 Same as VST2, VDD=3.300V Supply Current 1 IDD2 Same as IDD1, FB=1.2V Supply Current 2 Same as IDD1, CE/Vref=0V ISTB Stand-by Current FOSC Same as IDD1 Oscillation Frequency MAXDTY Same as IDD1 Maximum Duty Ratio PFMDTY No Load PFM Duty Ratio (XC9106 series) EFFI Recommended Circuit using XP161A1355 Efficiency TSS Soft-start Time Vref=0.9V Same as IDD1 VCEH CE "High" Voltage Same as IDD1 VCEL CE "Low" Voltage EXT "High" ON Resistance REXTH Same as IDD1, VEXT=VOUT-0.4V REXTL Same as IDD1, VEXT=0.4V EXT "Low" ON Resistance ICEH Same as IDD2, CE=2.5V CE "High" Current Same as IDD2, CE=0V ICEL CE "Low" Current Same as IDD2, CE=VDD IFBH FB "High" Current Same as IDD2, CE=0V IFBL FB "Low" Current
24 16 0.0
Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOS FET should be connected. 0.09 (V) , Vref = RFB1, 2 x 10 VDD = 3.30 (V) 50 (mA) VIN = 3.30 (V) IOUT =
Notes
*1 Although the IC starts step-up operations from a VDD of 0.8V, the output voltage and oscillation frequency are stabilized at VDD 1.8V or (Vref applied voltage + 0.7V). Therefore, a VDD of more than 1.8V or (Vref applied voltage + 0.7V) is recommended when VDD is supplied from VIN or other power sources.
3
XC9106 / 07 Series
Preliminary
Electrical Characteristics
XC9106D003MR, XC9107D003MR PARAMETER Output Voltage Reference Voltage Range FB Control Voltage *1 *1
Power Supply Voltage Range
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
(FOSC=300 (kHz) MIN. 8.820 0.8 Vref = 0.9V 0.882 VDD as shown right or (Vref applied voltage + 0.7V) 1.8 Vref = 0.9V
Recommended Circuit using 2SD1628, IOUT=1.0mA
Ta=25OC TYP. 9.000 0.900 MAX. 9.180 2.5 0.918 10.0 0.9 0.8 0.7 88 22 1.0 345 87 40 20.0 0.20 36 24 2.5 -0.1 0.1 -0.1 UNITS V V V V V V V A A A KHz % % % mS V V A A A A Circuit
Operation Start Voltage Oscillation Start Voltage
SYMBOL VOUT Vref VFB VDD VST1 VST2
CONDITIONS
1 4 3 4 3 4 4 5 4 4 1 1 1 5 5 4 4 5 5 5 5
No external connections CE/Vref=0.9V, Voltage applied, FB=0V 62 16 255 75 24 5.0 0.65 300 81 32 85 10.0
VHLD Operation Holding Voltage Recommended Circuit using 2SD1628, IOUT=1.0mA Same as VST2, VDD=3.300V IDD1 Supply Current 1 Same as IDD1, FB=1.2V IDD2 Supply Current 2 Same as IDD1, CE/Vref=0V ISTB Stand-by Current Oscillation Frequency FOSC Same as IDD1 Maximum Duty Ratio MAXDTY Same as IDD1 PFM Duty Ratio PFMDTY No Load (XC9106 series) Efficiency EFFI Recommended Circuit using XP161A1355 TSS Soft-start Time Vref=0.9V Same as IDD1 VCEH CE "High" Voltage Same as IDD1 VCEL CE "Low" Voltage EXT "High" ON Resistance REXTH Same as IDD1, VEXT=VOUT-0.4V REXTL Same as IDD1, VEXT=0.4V EXT "Low" ON Resistance Same as IDD2, CE=2.5V ICEH CE "High" Current Same as IDD2, CE=0V ICEL CE "Low" Current Same as IDD2, CE=VDD IFBH FB "High" Current Same as IDD2, CE=0V IFBL FB "Low" Current
24 16 0.0
Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOS FET should be connected. Vref = 0.09 (V) , RFB1, 2 x 10 VDD = 3.30 (V) VIN = 3.30 (V) 50 (mA) IOUT =
Notes
*1 Although the IC starts step-up operations from a VDD of 0.8V, the output voltage and oscillation frequency are stabilized at VDD 1.8V or (Vref applied voltage + 0.7V). Therefore, a VDD of more than 1.8V or (Vref applied voltage + 0.7V) is recommended when VDD is supplied from VIN or other power sources.
Standard Circuit
RSENSE CFB VOUT RFB1 RFB2 1 CL 2 3 CE/Vref 4 5 Nch Power MOS FET Cb Rb L SD VIN
When obtaining VDD from a source other than VOUT, please insert a capacitor CDD between the VDD pin and the GND pin in order to provide stabler operations. Please wire CL & CIN between the VOUT/VDD pin and the GND pin. Strengthen the wiring sufficiently. When using a capacitor other than ceramic or low ESR at CL, please take away RSENSE and short.
Insert Rb and CB when using a bipolar NPN Transistor.
4
XC9106 / 07 Series
Preliminary
Operational Description
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
The XC9106 / 07 series are reference voltage (Vref) apply external step-up DC/DC Controler ICs. Output voltage will be set with external resistors (RFB1 and 2) and Vref value. The series make it easy to control output voltage externally and are suited to software applications that need to vary voltage such as LCD power supply for PDA. Error Amplifier is designed to monitor the output voltage, comparing the feedback voltage (FB) with the reference voltage Vref. In response to feedback of a voltage lower than the reference voltage Vref, the output voltage of the error amp. decreases. This circuit generates the internal reference clock. The Ramp Wave Generator generates a saw-tooth waveform based on outputs from the OSC 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. The PWM/PFM automatic switching mode 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. Noise is easily reduced with PWM control since the switching frequency is fixed. Because of the function, control suited to the application can easily be selected. The reference voltage of the XC9106/9107 series is adjusted and fixed by external applied voltage. (For output voltage settings, please refer to the output voltage setting on page 6.) 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 error amp, the operation maintains a balance between the two inputs of error amps and controls the EXT pin's ON time so that it doesn't increase more than is necessary. The XC9106/9107 series alters soft start times by the setting value of reference voltage in order to protect against voltage overshoot and also to protect against inrush current. Please determine soft start time by the formula equation. TSS = 8.65 x Vref + 2.21
30
XC9106 / XC9107D xxx MR
Soft Start Time : TSS (ms)
[Example Computation] Vref = 0.9V, TSS = 8.65 x 0.9 + 2.21 = 10.0 ms
25 20 15 10 5 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0
Reference Voltage Vref (V) This function controls the operation and shutdown of the IC. When the voltage of the CE pin drops to 0.2V or less, disable mode will be entered, the IC's operations will stop and the EXT pin will be kept at a low level (the external N-type MOSFET will be OFF) . When the IC is in a state of chip disable, current consumption will be no more than 1.0A. When the CE pin's voltage rises to 0.65V or more, enable mode will be entered and operations will recommence. The CE pin also doubles with reference voltage in the XC9106/9107 series, and the range of reference voltage can be varied externally from 0.8V to 2.5V.
5
XC9106 / 07 Series
Preliminary
Functional Settings
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
< Output Voltage Setting> Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of RFB1 and RFB2. The sum of RFB1 and RFB2 should normally be 2 M or less. The range of reference voltage of the series can be varied externally from 0.8V to 2.5V. VOUT = Vref applied voltage x (RFB1 + RFB2) / RFB2 The value of CFB1, speed-up capacitor for phase compensation, should result in fzfb = 1/(2 x CFB x RFB1) equal to 5 to 30kHz. Adjustments are required depending on the application, value of inductance (L), and value of load capacity (CL). fzfb = 30kHz (L=10H) fzfb = 20kHz (L=22H) fzfb = 10kHz (L=47H) RFB1 : 270k CFB : 20pF 27pF 56pF RFB2 : 30k (fzfb = 30kHz, L = 10H) (fzfb = 20kHz, L = 22H) (fzfb = 10kHz, L=47H)
< The use of ceramic capacitor CL > The circuit of the XC9106/9107 series is organized by a specialized circuit which reenacts negative feedback of both voltage and current. Also by insertion of approximately 100m of a low and inexpensive sense resistor as current sense, a high degree of stability is possible even using a ceramic capacitor, a condition which used to be difficult to achieve. Compared to a tantalum condenser, because the series can be operated in a very small capacity, it is suited to use of the ceramic capacitor which is cheap and small.
Recommended Components
Tr: *When a MOSFET is used : 2SK2159 (NEC N-Channel Power MOSFET) Note* : With direct voltages over 4.5V, use the XP161A11A1PR. *When a NPN Tr. Is used : 2SD1628 (Sanyo) Rb : 500 (adjust with Tr's HFE or load) Cb : 2200pF (ceramic type) Cb 1 / (2 x Rbx FOSC x 0.7)
SD: L, CL :
MA2Q737 (Schottky Diode type, MATSUSHITA) Adjust as below according to the condition and peripheral components When Ceramic capacitor is used : L: 22H (SUMIDA CDRH5D28, FOSC = 100kHz) 10H (SUMIDA CDRH5D18, FOSC = 300kHz) CL : 10V 10F (Ceramic capacitor, LMK325BJ106ML, TAIYOYUDEN) Use the formula below when step-up ratio and output current is large. CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN) RSENSE : 100m (FOSC = 300kHz) Look up "Low Chip Resistor" for the selection 50m (FOSC = 100kHz) When Tantalum condenser is used : L: 22H (SUMIDA CDRH5D28, FOSC = 300kHz) 47H (SUMIDA CDRH5D28, FOSC = 100kHz) Except when IOUT(mA) / 100mA x VOUT / VIN > 2 22H CL: 16V 47F (tantalum type NIPPONCHEMI 16MCE476MD2) Use the formula below when step-up ratio and output current is large. CL = (CL standard value) x (IOUT(mA) / 300mA x VOUT / VIN) RSENSE: Not required, but short out the wire. When AL Electrolytic condenser is used : L: 22H (SUMIDA CDRH5D28, FOSC = 300kHz) 47H (SUMIDA CDRH5D28, FOSC = 100kHz) Except when IOUT(mA) / 100mA x VOUT / VIN > 2 22H CL: 16V 100F (AL electrolytic type) + 10V 2.2F (ceramic type) Strengthen appropriately when step-up ratio and output current is large. RSENSE: Not required, but short out the wire. CFB: Set up so that fzfb = 100kHz. 6
XC9106 / 07 Series
Preliminary
Test Circuits
PWM Control, PWM/PFM Switching Control,
Step-up DC/DC Converters
Externally Applied Reference Voltage (Vref)
Circuit 1
SD L A Tr VIN CIN CE GND FB RFB2 RL OSC EXT VDD CFB RFB1 CL V A RSENSE VOUT
Circuit 4
RP CP
OSC EXT CE GND VDD FB CDD A
Circuit 2
A
Circuit 5
EXT
SD L OSC EXT CE GND VDD FB RFB2 RL
VDD FB GND A A
A
RSENSE CFB
C CE E
A Tr VIN CIN
CB
RFB1 CL
A
V
RB
Circuit 3
SD L A Tr VIN CIN RB CE GND CB OSC EXT VDD FB RFB2 RL CFB RFB1 CL V A RSENSE
7

▲Up To Search▲

Price & Availability of XC9107D

	To Download XC9107D Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .