SC1631
SC1631 is LOW VOLTAGE STEP-UP DC-DC CONVERTER manufactured by SEMTECH.
DESCRIPTION
The SC1631 is a high efficiency step up DC-DC converter. Only four external ponents are required to deliver a fixed voltage of 3V, 3.3V, or 5V. Efficiency beyond 87% can be easily achieved at 100m A 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 120k Hz reduces the inductor size inductors of 25µH to 50µH are remended for most applications.
Features
- High efficiency 90%
- Power-saving shutdown mode (7µA typical)
- Internal 2A switch
- 120k Hz switching rate
- Adjustable switch current limit
- On-chip low battery detector APPLICATIONS
- Palmtop and notebook puters
- Pocket organizers
- Cameras
- Pagers
- Battery backup supplies
- Portable instruments
BLOCK DIAGRAM
ORDERING INFORMATION
DEVICE
(1)
OUTPUT VOLTAGE 3.3V 3.0V 5.0V
PACKAGE SO-8
SC1631CS SC1631-3CS SC1631-5CS
Note: (1) Add suffix ‘TR’ for tape and reel.
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage Operating Temperature Range Storage Temperature Range Symbol Maximum VIN TA TSTG 7.0 0 to 70 -65 to 125 Units V °C °C
© 1997 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
LOW VOLTAGE STEP-UP DC-DC CONVERTER
January 29,...
