■ DESCRIPTION

The MB3788 is a dual-channel PWM-type switching regulator controller; it incorporates a reference voltage.

The MB3788 has a PWM circuit and an output circuit as well as a reference voltage power supply with a voltage accuracy of ±1. The maximum operating frequency is 1 MHz. It is designed for a voltage-drop output switching regulator suitable for a logic power supply or speed control of a DC motor.

The MB3788 is compatible with all master ICs producing triangular waves, sawtooth waves and sine waves with an amplitude of 1.3 to 1.9 V.

It can be used in high-performance portable equipment such as a video camcorder or notebook personal computer (word processor).

■ FEATURES

- Wide operating power supply voltage range: 3.6 to 18 V

- Low power dissipation

- Operating: 1.9 mA (standard)

Standby: 10 µA max.

- High-frequency operation: 100 kHz to 1 MHz

- On-chip timer and latch-type short-circuit detection circuit

- Wide error amplifier input voltage range: -0.2 V to VCC - 1.8 V

- On-chip high-accuracy reference voltage circuit: 2.50 V ±1

- Output circuit

PNP transistor drive output pin: Push-pull type

ON/OFF current values set independently

- On-chip standby function and output control function

- High-density packaging: SSOP-24P