MB3782 Datasheet | Fujitsu Semiconductor Limited

DESCRIPTION The FUJITSU MB3782 is a PWM-type switching regulator controller, designed with open-collector output for connection to external drive transistors and coils, providing a selection of three types of output voltage: stepup, step-down or inverting (inverting output is available on one circuit only). The MB3782 features identical oscillator output waveforms to enable pletely synchronous operation and prevent the occurrence of low-frequency beat between channels. Also, the MB3782 features low power dissipation (2.1 m A typ) and a built-in standby mode (10 µA), making possible the configuration of a wide variety of. high-efficiency, stable power supplies, even with the use of battery power. The MB3782 is an ideal power supply for high-performance portable devices such as video camcorders and cameras. Data Shee s FEATURES - - - - - - - - Wide voltage range (3.6 to 18 V) Low power dissipation (operating mode: 2.1 m A (typ), standby mode: 10 µA (max) Wide range of oscillator frequencies, high-frequency capability (1 to 500 k Hz) On-chip timer-latch type short detection circuit On-chip undervoltage lockout circuit On-chip 2.50 V reference voltage circuit (1.25 V output available at RT pin) Dead time adjustment over full duty cycle range On-chip standby mode (power on/off function) (Continued) s PACKAGE Plastic DIP , 20 pin Plastic SOP , 20 pin . (DIP-20P-M01) (FPT-20P-M01) Data Sheet 4 U . .. MB3782 s PIN ASSIGNMENT TOP VIEW VREF CT RT + IN1 - IN1 FB1 DTC1 PUT1 GND OUT2 1 2 3 4 5 6 7 8 9 10 VCC CTL - IN3 FB3 DTC3 OUT3 SCP - IN2 FB2 DTC2 20 19 18 17 16 15 14 13 12 11 et4U. (DIP-20P-M01) (FPT-20P-M01) Data Shee . s PIN DESCRIPTION Pin No. 1 2 Pin Name VREF CT I/O O - Description 2.50 V (typ) voltage output: provides load current up to 3 m A, for use as error amplifier reference input and for dead time setting. Oscillator timing capacity connection: should be used in the capacity range 150 to 15000 p F. Oscillator timing resistor connection: should be used...