General Description

The APW7137 is a fixed switching frequency (1MHz typical), current-mode, step-up regulator with an integrated N-channel MOSFET. The device allows the usage of small inductors and output capacitors for portable devices. The current-mode control scheme provides fast transient response and good output voltage accuracy.

The APW7137 includes under-voltage lockout, current limit, and over-temperature shutdown preventing damage in the event of an output overload.

Features

· Wide 2.5V to 6V Input Voltage Range

· Built-in 0.6W N-Channel MOSFET

· Built-in Soft-Start

· High Efficiency up to 90%

· <1mA Quiescent Current During Shutdown

· Current-Mode Operation

   - Stable with Ceramic Output Capacitors

   - Fast Transient Response

· Current-Limit Protection

· Over-Temperature Protection with Hysteresis

· Available in a Tiny 5-Pin SOT-23 Package

· Lead Free and Green Devices Available (RoHS Compliant)

Applications

· Cell Phone and Smart Phone

· PDA, PMP, MP3

· Digital Camera

· Boost Regulators