MB3788 Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Fabricante

MB3788

SWITCHING REGULATOR CONTROLLER

Fujitsu 

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27209-1E

ASSP

SWITCHING REGULATOR

CONTROLLER

MB3788

s DESCRIPTION

The MB3788 is a dual-channel PWM-type switching regulator controller; it in-

corporates 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, saw-

tooth 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 cam-

corder or notebook personal computer (word processor).

s 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

24-PIN PLASTIC SSOP

(FPT-24P-M03)

This device contains circuitry to protect the inputs against

damage due to high static voltages or electric fields. However,

it is advised that normal precautions be taken to avoid appli-

cation of any voltage higher than maximum rated voltages to

this high impedance circuit.

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