■ DESCRIPTION

The MB3883 is a 6-channel step-up/step-down DC/DC converter IC using pulse width modulation (PWM) and synchronous rectification, designed for low voltage, high efficiency, and compact size. This IC is ideal for up conversion, down conversion, and up/down conversion (using a step-up/step-down Zeta system with free input and output settings).

The MB3883 can operate at low voltage levels, and has a wide supply voltage range from 1.7 V to 9 V.

The MB3883 is available in two packages, an LQFP-48P or a leadless BCC-48P formed with a contact electrode pad only.

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 synchronous rectification (CH1, 2, 5)

• Supports for down-conversion and up/down Zeta conversion (CH1, 2)

Supports for up-conversion (CH5)

• Supports up-conversion (CH3, 4, 6)

• Low start-up voltage : 1.7 V (CH6)

• Power supply voltage range : 2.4 V to 9 V (CH6)

: 3.6 V to 9 V (CH1 to CH5)

• Built-in high-precision reference voltage circuit : ±1

• Wide operating oscillator frequency range with high-frequency capability : 100 kHz to 1 MHz

• Error amplifier output for soft start (CH1 to CH6)

• Totem-pole type output switch control circuit