FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27209-1E
ASSP
SWITCHING REGULATOR
CONTROLLER
MB3788
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DESCRIPTION
24-PIN PLASTIC SSOP
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).
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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 V
CC
- 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
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.
(FPT-24P-M03)
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FUJITSU [ FUJITSU COMPONENT LIMITED. ]
