Products
Power Management
Semtech SC4603
Very Low Input, MHz Operation, High-Efficiency Synchronous Buck
The SC4603 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from input supply range 2.25V to 5.5V. A high level of integration reduces external component count and makes it suitable for low voltage applications where cost, size and efficiency are critical.
Overview
Features
- BiCMOS voltage-mode PWM controller
- 2.25 V to 5.5 V Input voltage range
- Output voltages as low as 0.5 V
- Sleep mode (Icc = 10 μA typ)
- Lossless adjustable over-current protection
- Combination pulse by pulse & hiccup mode current limit
- High-efficiency synchronous switching
- 0% to 100% duty cycle range
- Synchronization to external clock
- Asynchronous start-up
- 1 MHz frequency of operation
- 10-pin MSOP surface mount package
Applications
- Distributed power architecture
- Servers/workstations
- Local microprocessor core power supplies
- DSP and I/O power supplies
- Battery-powered applications
- Telecommunication equipment
- Data processing applications
Packaging
MSOP-10
Order Codes
- SC4603IMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
Diagrams and Specs
Block Diagram
Click diagram to enlarge