■ DESCRIPTION

The MB39A115 is a 5-channel DC/DC converter IC using pulse width modulation (PWM) , and the MB39A115 is suitable for up conversion, down conversion, and up/down converstion. The MB39A115 is built in 5 channels into TSSOP-38P/BCC-40P package and operates at 2 MHz maximum and, this IC can control and soft-start at each channel. The MB39A115 is suitable for power supply of high performance potable instruments such as a digital still camera (DSC).

■ FEATURES

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

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

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

• Low voltage start-up (ch.5) : 1.7 V

• Power supply voltage range : 2.5 V to 11 V

• Reference voltage : 2.0 V ± 1

• Error amplifier threshold voltage : 1.0 V ± 1 (ch.1) , 1.23 V ± 1 (ch.2 to ch.5)

• 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)