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DS04-27209-3E
FUJITSU SEMICONDUCTOR
DATA SHEET
ASSP
SWITCHING REGULATOR
CONTROLLER
MB3788
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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, saw-tooth waves and sine waves with
an amplitude of 1.3 V to 1.9 V.
It can be used in high-performance portable equipment such as a video camcorder or notebook personal computer
(word processor).
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FEATURES
• Wide operating power supply voltage range: 3.6 V to 18 V
• Low power dissipation
• Operating: 1.9 mA (standard)
Standby: 10 µA Max
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PACKAGE
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 application of any voltage higher than maximum rated voltages to this high
impedance circuit.
24-pin Plastic SSOP
(FPT-24P-M03)