FUJITSU MICROELECTRONICS
DATA SHEET
DS04-27205-7Ea
ASSP Power Supplies
BIPOLAR
Switching Regulator Controller
MB3782
■ DESCRIPTION
The FUJITSU MICROELECTRONICS MB3782 is a PWM-type switching regulator controller, designed with opencollector output for connection to external drive transistors and coils, providing a selection of three types of output
voltage: step-up, step-down or inverting (inverting output is available on one circuit only).
The MB3782 features identical oscillator output waveforms to enable completely synchronous operation and
prevent the occurrence of low-frequency beat between channels.
Also, the MB3782 features low power dissipation (2.1 mA 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.
■ FEATURES
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Wide voltage range (3.6 V to 18 V)
Low power dissipation (operating mode: 2.1 mA (Typ), standby mode: 10 µA (Max)
Wide range of oscillator frequencies, high-frequency capability (1 kHz to 500 kHz)
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)
One type of package (SOP-20pin : 1 type)
■ APPLICATIONS
• LCD monitor/panel
• Surveillance camera
etc.
Copyright©1995-2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved
2006.5
