SC1630
SC1630 is LOW VOLTAGE MULTI-MODE DC-DC CONVERTER manufactured by SEMTECH.
LOW VOLTAGE MULTI-MODE DC-DC CONVERTER
January 30, 1998
TEL:805-498-2111 FAX:805-498-3804 WEB:http://.semtech.
DESCRIPTION
The SC1630 is a DC-DC converter designed to drive an external power switch for more flexibility, especially in higher voltage and larger power applications. Typically six ponents are required to set up a step-up configuration easily achieving an efficiency beyond 80%. A few more ponents are required to set up a step down configuration delivering 4A load current with 83% typical efficiency, 86% at 2A load, and 300µA quiescent current. The output voltage can be internally set to 5V or externally set to an arbitrary value below breakdown voltage of the power switch. Logic-controlled shutdown mode is provided for power-saving. The low battery detector can also be configured as a linear regulator. A 120k Hz switching rate reduces the inductor size. Inductors of 25µH to 50µH inductance are remended for most applications.
Features
- Default +5V output voltage
- Adjustable output voltage with two resistors
- Power-saving shutdown mode (7µA typical)
- 120k Hz switching rate
- On-chip low battery detector
BLOCK DIAGRAM
APPLICATIONS
- Palmtop and notebook puters
- Battery charger supply
- Cellular telephones
- LCD contrast supply
- Flash memory programmer
- Battery backup supplies
- Portable instruments PIN CONFIGURATION
ORDERING INFORMATION
DEVICE
(1)
PACKAGE SO-8
SC1630CS Note: (1) Add suffix ‘TR’ for tape and...
