AIC1555

Features:

95% Efficiency or up
700mA Guaranteed Output Current.
Adjustable Output Voltage from 0.75V to VIN of a range from +2.5V to 6.5V.
Very Low Quiescent Current: 35mA (Typ.).
Fixed- 500KHz or Adjustable Frequency Synchronous PWM Operation.
Synchronizable external Switching Frequency up to 1MHz.
Constant Over-current-protection mode.
Accurate Reference: 0.75V (¡Ó2%).
100% Duty Cycle in Dropout.
Low Profile 8-Pin MSOP Package.

Application

PDAs.
Digital Still Cameras.
Handy-Terminals.
Cellular Phones.
CPU I/O Supplies.
Cordless Phones.
Notebook Chipset Supplies.
Battery-Operated Devices (4 NiMH/ NiCd or 1 Li-ion Cells).

Pinout






Description

The AIC1555 is a low-noise pulse-width-modulated (PWM) DC-DC step-down converter. It powers logic circuits in PDAs and small wireless systems such as cellular phones, handy-terminals.
The device features an internal synchronous rectifier for high conversion efficiency. Excellent noise characteristics and fixed-frequency operation provide easy post-filtering. The AIC1555 is ideally suited for Li-ion battery applications. It is also suitable for +3V or +5V fixed input applications. The device can operate in either one of the following four modes.


The AIC1555 is a low-noise pulse-width-modulated (PWM) DC-DC step-down converter. It powers logic circuits in PDAs and small wireless systems such as cellular phones, handy-terminals.
The device features an internal synchronous rectifier for high conversion efficiency. Excellent noise characteristics and fixed-frequency operation provide easy post-filtering. The AIC1555 is ideally suited for Li-ion battery applications. It is also suitable for +3V or +5V fixed input applications. The device can operate in either one of the following four modes.