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x Input Voltage Range: 2.2~10.0V x Output Voltage Range: 1.5~6.0V(2.5%) x Oscillator Frequency: 300kHz(15%) x Maximum Duty Ratio: 100% x High Efficiency: 92% x PWM/PFM Switching Control (XC6366) x SOT-25 Package
s General Description
The XC6365/66 series are multi-functional step-down DC/DC converters with built-in high speed, low ON resistance drivers. An output current of more than 1A is possible using an externally connected transistor, coil, diode and capacitor. Output voltage is programmable in 0.1V steps between 1.5V to 6.0V (VOUT) (2.5% accuracy). Further, with 1.0V of standard voltage supply internal and using externally connected components, output voltage can be set up freely (FB). With a 300kHz switching frequency, the size of the external components can be reduced. Control switches from PWM to PFM during light loads with the XC6366 (PWM/PFM switchable) and the series is highly efficient from light loads to large output currents. In relation to soft-start time, both internally set-up 10msec types (A,B) and external resistor or capacitor regulated types (C,D) are available. During stand-by time (CE pin "Low" ), current consumption is reduced to less than 0.5A. With U.V.L.O internal, the external Tr. will be forcibly switched off if used below the stipulated voltage.
s Applications
q Electronic Information Organizers q Palmtops q Cellular and portable phones q Portable Audio Systems q Various Multi-function Power Supplies
s Features
Input voltage range: 2.2V~10V (VOUT type) Output voltage range: 1.5V~6.0V programmable in 0.1V steps (2.5%) Oscillator frequency: 300kHz (15%) Custom products for 180, 500kHz Output Current: 1.0A + (VIN=5.0V, VOUT=3.0V) High Efficiency: 92% (typ.) Stand-by capability: ISTB=0.5A (max.) Soft-start time set-up externally type possible Internally set-up output voltage type possible (VOUT) Externally set-up outut voltage type possible (FB) Package: SOT-25
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s Pin Configuration
VOUT (FB) CE
s Pin Assignment
PIN NUMBER 1 2 3 PIN NAME EXT/ VDD GND FUNCTION External Transistor Connection Power Supply Ground Chip Enable Soft-start capacitor connection with soft-start externally set-up types (C,D) Output Voltage Monitor FB with externally set-up types (B,D)
4
5
1
EXT/
2
VDD
3
GND
4
CE
SOT-25 (TOP VIEW)
5
VOUT (FB)
s Selection Guide
START
Soft-start internally set-up Output voltage internally set-up XC6365A, XC6366A XC6365B, XC6366B
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Output voltage externally set-up
Soft-start externally set-up Output voltage internally set-up Output voltage externally set-up XC6365C, XC6366C XC6365D, XC6366D
s Ordering Information
XC6365 XC6365 Series
A B C D
PWM Control
VOUT type - internally set-up soft-start FB type - internally set-up soft-start VOUT type - externally set-up soft-start FB type - externally set-up soft-start Output voltage e.g. 3.0V output : ( =3, N.B. with FB (B,D) types ( =1, =0) =0),
3 5 2 M R L
Oscillator frequency 300kHz Oscillator frequency 500kHz (Custom) Oscillator frequency 180kHz (Custom) Package SOT-25 Embossed Tape : standard loading : reverse loading
XC6366 XC6366 Series
PWM/PFM switching control (same as XC6365 series)
s Block Diagram
XC6365, XC6366 Series A,C type (Vout)
VOUT
Phase Compensation Error Amp.
VDD
+ + PWM Comparator Buffer, Driver
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EXT/
CE
Vref with Soft Start CE
PWM/PFM Controller
Ramp Wave Generator, OSC
GND
XC6365, XC6366 Series B,D type (FB)
Phase Compensation Error Amp.
VDD
FB
+ + PWM Comparator Buffer, Driver
EXT/
CE
Vref with Soft Start, CE
PWM/PFM Controller
Ramp Wave Generator, OSC
GND
s Absolute Maximum Ratings
PARAMETER VIN Pin Voltage VOUT Pin Voltage FB Pin Voltage CE Pin Voltage EXT/ Pin Voltage SYMBOL VDD VOUT VFB VCE VEXT/ IEXT/ Pd Topr Tstg RATINGS -0.3 ~ 12 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 100 150 -30 ~ +80 -40 ~ +125
Ta=25: UNITS V V V V V mA mW : :
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EXT/ Pin Current Continuous Total Power Dissipation Operating Ambient Temperature Storage Temperature
s Electrical Characteristics
XC6365A333MR, XC6366A333MR
PARAMETER Output Voltage Maximum Input Voltage UVLO Voltage (min. operating voltage) Supply Current 1 Supply Current 2 Stand-by Current Oscillator Frequency Maximum Duty Ratio PFM Duty Ratio CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance Efficiency Soft-Start Time SYMBOL VOUT VIN VUVLO IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY VCEH VCEL REXTBH REXTBL EFFI TSS
VIN=5.0V, IOUT=220mA
(VOUT=3.3V, FOSC=300kHz) CONDITIONS MIN 10.0 Same as IDD1, voltage required to maintain H at EXT/ No external components, CE=VIN, VOUT=0V No external components, CE=VOUT=VIN No external components, CE=VOUT=0V Measuring of EXT/ waveform, VIN=output voltage + 0.3V No load (XC6366 only) No external components, VOUT=0V, apply 0.65V (min.) to CE, determine EXT/ "Low" Same as VCEH, determine EXT/ "High" Same as IDD2, VEXT/=VIN-0.4V Same as IDD1, VEXT/=0.4V Use of a XP162A01B5 transistor recommended 5 16 14 92 10 20 255 100 15 0.65 0.20 22 19 300 25 XC6365 XC6366 0.9 57 57 15 2.2 102 102 27 0.5 345 35 TYP
Ta=25: MAX UNITS V V V A A A A kHz % % V V A A % msec 3.218 3.300 3.383
Measuring conditions: Unless otherwise specified, connect external components. Series Amendments:
XC6365C, XC6366C series
External Components : CSS=0.033F, RSS=470k The following parameter applies : Soft Start Time (TSS) : Connect RSS, CSS. CE, 0V 3.0V (When VIN<3.0V, VIN=3.0V)
s Electrical Characteristics
XC6365A503MR, XC6366A503MR
PARAMETER Output Voltage Maximum Input Voltage UVLO Voltage (min. operating voltage) Supply Current 1 Supply Current 2 Stand-by Current Oscillator Frequency Maximum Duty Ratio PFM Duty Ratio CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance Efficiency Soft-Start Time SYMBOL VOUT VIN VUVLO IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY VCEH VCEL REXTBH REXTBL EFFI TSS
VIN=7.5V, IOUT=330mA
(VOUT=5.0V, FOSC=300kHz) CONDITIONS MIN 10.0 0.9 67 XC6365 XC6366 255 100 15 0.65 0.20 12 10 93 5 10 20 17 14 67 16 300 25 TYP
Ta=25: MAX UNITS V V V A A A A kHz % % V V A A % msec 4.875 5.000 5.125
Same as IDD1, voltage required to maintain H at EXT/ No external components, CE=VIN, VOUT=0V No external components, CE=VOUT=VIN No external components, CE=VOUT=0V Measuring of EXT/ waveform, VIN=output voltage + 0.3V No load (XC6366 only) No external components, VOUT=0V, apply 0.65V (min.) to CE, determine EXT/ "Low" Same as VCEH, determine EXT/ "High" Same as IDD2, VEXT/=VIN-0.4V Same as IDD1, VEXT/=0.4V Use of a XP162A01B5 transistor recommended
2.2 122 122 29 0.5 345 35
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Measuring conditions: Unless otherwise specified, connect external components. Series Amendments:
XC6365C, XC6366C series
External Components : CSS=0.033F, RSS=470k The following parameter applies : Soft Start Time (TSS) : Connect RSS, CSS. CE, 0V 3.0V (When VIN<3.0V, VIN=3.0V)
s Electrical Characteristics
XC6365B103MR, XC6366B103MR
PARAMETER Output Voltage Maximum Input Voltage UVLO Voltage (min. operating voltage) Supply Current 1 Supply Current 2 SYMBOL VOUT VIN VUVLO IDD1 IDD2 ISTB FOSC MAXDTY PFMDTY VCEH VCEL REXTBH REXTBL EFFI TSS
VIN=4.5V, IOUT=200mA
(VOUT=3.0V [when set up], FOSC=300kHz) CONDITIONS MIN 10.0 0.9 55 XC6365 XC6366 255 100 15 0.65 0.20 17 15 92 5 10 20 24 20 55 15 300 25 TYP
Ta=25: MAX UNITS V V V A A A A kHz % % V V A A % msec 2.925 3.000 3.075
Same as IDD1, voltage required to maintain H at EXT/ No external components, CE=VIN, FB=0V No external components, CE=VIN, FB=1.2V No external components, CE=FB=0V Measuring of EXT/ waveform, VIN=output voltage + 0.3V No load (XC6366 only) No external components, FB=0V, apply 0.65V (min.) to CE, determine EXT/ "Low" Same as VCEH, determine EXT/ "High" Same as IDD2, VEXT/=VIN-0.4V Same as IDD1, VEXT/=0.4V Use of a XP162A01B5 transistor recommended
2.2 100 100 27 0.5 345 35
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Stand-by Current Oscillator Frequency Maximum Duty Ratio PFM Duty Ratio CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance Efficiency Soft-Start Time
Measuring conditions: Unless otherwise specified, connect external components. External components: RFB1 = 400k, RFB2 = 200k, CFB = 100pF Series Amendments:
XC6365D, XC6366D series
External Components : CSS=0.033F, RSS=330k The following parameter applies : Soft Start Time (TSS) : Connect RSS, CSS. CE, 0V 3.0V
s Typical Application Circuits
Circuit 1. XC6365A, XC6366A
Tr
L
VDD VIN + CIN SD EXT/ CE GND VOUT + CL
VOUT
RL
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Circuit 2.
XC6365B, XC6366B
Tr
L
VDD VIN EXT/ + CIN SD CE GND FB RFB2 CFB RFB1 + CL
VOUT
RL
Circuit 3.
XC6365C, XC6366C
Tr
L
VDD VIN + CIN SD EXT/ RSS CE GND CSS + CL VOUT
VOUT
RL
Circuit 4.
XC6365D, XC6366D
Tr
L
VDD VIN EXT/ + CIN SD RSS CE CSS GND FB RFB2 CFB RFB1 + CL
VOUT
RL
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Circuit 5.
XC6365A, XC6366A (when used with a PNP transistor)
Tr CB VDD EXT/ VOUT CE GND
L
RB VIN + CIN SD
VOUT + CL RL
Circuit 6.
XC6365B, XC6366B (when used with a PNP transistor)
Tr CB
L
VOUT RB VIN + CIN SD VDD EXT/ CE GND FB CFB RFB1 + CL RFB2 RL
Circuit 7.
XC6365C, XC6366C (when used with a PNP transistor)
Tr CB VDD EXT/ VOUT CE GND CSS
L
RB VIN + CIN SD RSS
VOUT + CL RL
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Circuit 8.
XC6365D, XC6366D (when used with a PNP transistor)
Tr CB
L
VOUT RB VIN + CIN RSS SD CSS VDD EXT/ CE GND FB CFB RFB1 + CL RFB2 RL
Recommended Components
Tr L SD CL CIN : XP162A01B5PR (Torex P-channel Power MOSFET) Please use a PNP transistor where VIN < 2.5V : 22H (Sumida CD54, FOSC=300kHz) 47H (Sumida CD75, FOSC=180kHz) 10H (Sumida CD54, FOSC=500kHz) : MA737 (Schottky Diode, Matsushita) : 10V 47F (Tantalum capacitor, Nichicon F93) : 16V 10F (Tantalum capacitor, Nichicon F93)
C, D type (soft-start externally set-up) :
CSS : 0.033F (Ceramic capacitor) RSS : 470k (C type), 330k (D type)
B, D type (FB versions)
RFB : Set up so that RFB1 / RFB2 = VOUT - 1 (VOUT = set output voltage), RFB1 = RFB2 2M CFB : Set up so that fzfb = 1/ (2 x x CFB x RFB1) is within the 0.5 to 20kHz range (10kHz conventional) Adjustments necessary in respect of L, CL. e.g VOUT = 3.0V RFB1 = 400k, RFB2 = 200k, CFB = 100pF
PNP Tr type :
Tr Rb Cb : 2SA1213 (Toshiba) : 500 (Adjust according to load and Tr. hFE levels) : 2200pF (Ceramic type) Set up so that CB 1 / (2 x RB x FOSC x 0.7)
s Notes on Use
Take ample care to ensure that none of the IC's, nor the external component's, absolute maximum ratings are exceeded. Be extremely careful when selecting parts and do not limit your reference to the specifications and characteristics for the DC/DC converter alone. The IC also depends, to a great extent, upon the external components. Arrange the peripherals in the environs of the IC. In order to reduce wiring impedance, use short, thick wires. In particular, wire the load capacitor as close as possible and strengthen the ground wiring sufficiently. Ground current during switching may cause the IC's operations to become unstable due to changes in ground voltage, so please strengthen the IC's GND pin surroundings.
Electrical Characteristics
(1) Output Voltage vs. Output Current
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(2) Efficiency vs. Output Current
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(3) Ripple Voltage vs. Output Current
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(4) Output Voltage vs. Ambient Temperature
(5) Oscillation Frequency vs. Ambient Temperature
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(6) PFM Duty Ratio vs. Ambient Temperature
(7) Supply Current1 vs. Ambient Temperature
(8) Supply Current2 vs. Ambient Temperature
(9) Stand-By Current vs. Ambient Temperature
(10) CE "L"Voltage vs. Ambient Temperature
(11) CE "H"Voltage vs. Ambient Temperature
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(12) EXT"H"ON Resistance vs. Ambient Temperature
(13) EXT"L"ON Resistance vs. Ambient Temperature
(14) Efficiency vs. Ambient Temperature
(15) Soft Start Time vs. Ambient Temperature
(16) Load Transient Response
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