MB3785A 데이터 시트보기 (PDF) - Fujitsu

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MB3785A

Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities)

Fujitsu 

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27208-4E

ASSP

BIPOLAR

Switching Regulator Controller

(4 Channels plus High-Precision, High-Frequency Capabilities)

MB3785A

s DESCRIPTION

The MB3785A is a PWM-based 4-channel switching regulator controller featuring high-precision, high-frequency

capabilities. All of the four channels of circuits allow their outputs to be set in three modes: step-down, step-up,

and inverted. The third and fourth channels are suited for DC motor speed control.

The triangular-wave oscillation circuit accepts a ceramic resonator, in addition to the standard method of oscillation

using an RC network.

s FEATURES

• Wide range of operating power supply voltages: 4.5 V to 18 V

• Low current consumption: 6 mA [Typ] when operating10 µA or less during standby

• Built-in high-precision reference voltage generator: 2.50 V±1%

• Oscillation circuit

- Capable of high-frequency oscillation: 100 kHz to 1 MHz

- Also accepts a ceramic resonator.

• Wide input range of error amplifier: –0.2 V to VCC–1.8 V

• Built-in timer/latch-actuated short-circuiting detection circuit

• Output circuit

- The drive output for PNP transistors is the totem-pole type allowing the on-current and off-current values to

be set independently.

s PACKAGE

(Continued)

48-pin, Plastic LQFP

(FPT-48P-M05)

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