MB3790 데이터 시트보기 (PDF) - Fujitsu

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MB3790

Battery Backup IC

Fujitsu 

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27502-3E

ASSP For Power Supply Applications

Bi-CMOS

Battery Backup IC

MB3790

s DESCRIPTION

The MB3790 is designed to control power supplies to SRAM, logic IC, or other circuit devices and protects them

against momentary power failures by using backup batteries. In addition to its function to supply the power to

these devices, it has a function to switch the source of power to the primary or secondary backup battery when

the power supply voltage drops below a predetermined level. Also, it outputs a reset signal when the power supply

turns on or off or when a fault occurs in the power supply.

Ideally designed as a single-chip IC for power supply control, the MB3790 consumes only a minimal current and

comes in a thin-type package. Therefore, it is best suited for power supply control in memory cards and similar

other devices.

s FEATURES

• Input circuit current consumption when non-loaded: 50 µA [typ]

• Output drive current: 200 mA [max]

• Resistance between input and output: 0.5 ohms [typ]

• Input power-down detection level: 4.2 V ± 2.5 %

• On-chip power-on reset circuit

• Primary battery voltage-down detection levels: 2.65 V, 2.37 V

(Continued)

s PACKAGES

Plastic SOP, 16 pin

Plastic SSOP*, 20 pin

(FPT-16P-M06)

(FPT-20P-M04)

* : Since the SSOP is an extremely thin package, use a partial heating method when mounting the device.

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