■ 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.