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MB39A123

6 ch DC/DC Converter IC with Synchronous Rectification

Fujitsu 

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27257-1E

ASSP For Power Supply Applications

6 ch DC/DC Converter IC with

Synchronous Rectification

MB39A123

■ DESCRIPTION

MB39A123 is a 6-channel DC/DC converter IC using pulse width modulation (PWM) , and it is suitable for up

conversion, down conversion, and up/down conversion. MB39A123 is built in 6 channels into BCC-48++/LQFP-

48P package and this IC can control and soft-start at each channel. MB39A123 is suitable for power supply of

high performance potable instruments such as a digital still camera (DSC).

■ FEATURES

• Supports for step-down with synchronous rectification (ch.1)

• Supports for step-down and up/down Zeta conversion (ch.2 to ch.4)

• Supports for step-up and up/down Sepic conversion (ch.5, ch.6)

• Negative voltage output (Inverting amplifier) (ch.4)

• Low voltage start-up (ch.5, ch.6) : 1.7 V

• Power supply voltage range

: 2.5 V to 11 V

• Reference voltage

: 2.0 V ± 1%

• Error amplifier reference voltage : 1.0 V ± 1% (ch.1) , 1.23 V ± 1% (ch.2 to ch.6)

• Oscillation frequency range

: 200 kHz to 2.0 MHz

• Standby current

: 0 µA (Typ)

• Built-in soft-start circuit independent of loads

• Built-in totem-pole type output for MOS FET

• Short-circuit detection capability by external signal (−INS terminal)

• Two types of packages (BCC-48 pin : 1 type, LQFP-48 pin : 1 type)

■ APPLICATIONS

• Digital still camera(DSC)

• Digital video camera(DVC)

• Surveillance camera

etc.

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