■ DESCRIPTION

The MB39A103 is a 4-channel DC/DC converter IC using pulse width modulation (PWM). This IC is ideal for up conversion, down conversion, and up/down conversion.

Achievement of low voltage start-up (1.7 V or more) enables operation from low voltage.

4ch is built in TSSOP-30P/package. Each channel can be controlled, and soft-start.

This is an ideal power supply for high-performance portable devices such as digital still cameras.

This product is covered by US Patent Number 6,147,477.

■ FEATURES

• Supports for down-conversion and up/down Zeta conversion (CH1)

• Supports for up-conversion and up/down Sepic conversion (CH2 to CH4)

• Low voltage start-up (CH4): 1.7 V

• Power supply voltage range : 2.5 V to 11 V

• Reference voltage : 2.0 V ± 1

• Error amplifier threshold voltage : 1.24 V ± 1.5

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

• Built-in soft-start circuit independent of loads

• High-frequency operation capability: 1.5 MHz (Max)

• External short-circuit detection capability by −INS terminal