SC1631

Features:

*  High efficiency 90%
*  Power-saving shutdown mode (7A typical)
*  Internal 2A switch
*  120kHz switching rate
*  Adjustable switch current limit
*  On-chip low battery detector


Application

*  Palmtop and notebook computers
*  Pocket organizers
*  Cameras
*  Pagers
*  Battery backup supplies
*  Portable instruments


Pinout




Specifications

Parameter	Symbol	Maximum	Units
Supply Voltage	VIN	7.0	v
Operating Temperature Range	TA	0 to 70	°C
Storage Temperature Range	TSTG	-65 to 125	°C

Description

The SC1631 is a high efficiency step up DC-DC converter. Only four external components are required to deliver a fixed voltage of 3V, 3.3V, or 5V. Efficiency
beyond 87% can be easily achieved at 100mA load with 2.2V to 3V input voltages.

A logic-controlled shutdown mode is provided for power saving. Switch current limit can be programmed with a resistor. The low battery detector can be configured as a linear regulator or a burst mode controller providing extremely low supply current operation.

A switching rate of 120kHz reduces the inductor size - inductors of 25H to 50H are recommended for most applications.