BD9763FVM-TR ROHM

Large Current External FET Controller Type Switching Regulators Single-output Step-up,High-efficiency Switching Regulator (Controller Type) BD9763FVM No.09028EAT07 Description BD9763FVM is a 1-channel high efficiency step-up switching regulator. It is possible to choose small application space due to its high-speed operation (Max switching frequency 1.2MHz) Features 1) Build-in under voltage lock out circuit. 2) High accuracy reference voltage (2.5V1.0%) 3) Establish maximum duty cycle internally. 4) CTL/SS terminal for both stand-by and soft-start function. (Soft-start time can be set by external capacitor) 5) MSOP8 thin and small package. Applications Single-lens reflex cameras, digital video cameras, liquid crystal modules, DVD drive. Absolute Maximum Ratings(Ta=25) Parameter Symbol Limit Unit Supply voltage Vcc 10 V Storage temperature range Tstg -55 to +150 Power dissipation Pd 587 * mW Junction temperature Tjmax +150 * IC mounted on a PCB board (70mm x 70mm x 1.6mm, glass epoxy). Reduced by 4.7mW for each increase in Ta of 1 over 25. Recommended Operating Conditions Limit Parameter Symbol Unit Min Typ Max Supply voltage Vcc 4 7 9 V Oscillating frequency fosc 100 - 1200 kHz Operating temperature range Topr -40 - +85 www.rohm.com 2009.05 - Rev.A 1/11 2009 ROHM Co., Ltd. All rights reserved. BD9763FVM Technical Note Electrical characteristics (Unless otherwise specified, Ta=25, Vcc=7.0V) Limits Parameter Symbol Unit Condition Min Typ Max Oscillator Oscillating frequency fosc 522 600 678 kHz R =24k RT Frequency tolerance FDV -5 0 5 % Vcc=4 to 9V Swing voltage Vpptr 0.5 V Stand-by, Soft start CTL/SS pin source current ISS -1.90 -1.00 -0.55 A V =1.5V CTL/SS CTL/SS pin clamp voltage VSS 2.2 2.4 2.6 V CTL threshold voltage VCTLTH 1.2 1.3 1.4 V PWM comparator 0% threshold voltage D0 1.5 1.6 1.7 V Maximum duty cycle DMAX 80 90 99.5 % Error amplifier Threshold voltage VIN 0.98 1.00 1.02 V Band width BW 3.0 MHzAV=0dB Voltage gain Av 70 dB Input bias current IIB -150 -70 nA Maximum output voltage VCH 2.3 2.4 2.6 V Minimum output current VCL 0.03 0.20 V Output source current IOI -3.1 -1.6 -1.0 mA V =1.0V FB Output sink current IOO 12 50 125 mA V =1.0V FB Reference voltage Output voltage VREF 2.475 2.500 2.525 V I =0mA VREF Load regulation VREFlo - - 10 mV I =0 to -1mA VREF Output short current IVREF -45 -16 -1 mA Whole device Stand-by current ICCS 420 610 960 A Circuit current ICCA 3.4 5.0 7.8 mA No load Output ON resistance RON 0.9 2.5 8.0 Output rise/fall time Tr/Tf 20 nsecCout=1000pF Ta=-40 to 85,VCC=4 to 9V, Output source current IOUTSO -0.80 A OUT=0Vrush current Ta=-40 to 85,VCC=4 to 9V, Output sink current IOUTSI 0.85 A OUT=VCCrush current Under voltage lock out Threshold voltage VUT 3.7 3.8 3.9 V Vcc sweep down Hysteresis width VUThy 0.05 0.10 0.15 V www.rohm.com 2009.05 - Rev.A 2/11 2009 ROHM Co., Ltd. All rights reserved.