■ 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.