Power Management
FemtoBuck DC-DC Regulators and Controllers

Semtech SC190

Synchronous Buck Converter with Programmable Output

Not recommended for new designs.

The SC190 is a synchronous step-down converter with integrated power devices and an integrated front-end LDO to minimize input supply ripple. Output voltage is programmable using two control bits, eliminating the need for feedback resistors tied to the output. The device is offered in four distinct variants with each variant providing four fixed output voltage options to choose from.

Overview

Features

Less than 1mV Supply Ripple
Output Voltage Regulated by Either the Switching Regulator or Linear Regulator
Dynamic Handover Between Linear and Switching Regulator for Maximum Efficiency
2.7V to 5.5V Input Range
300mA Guaranteed Output Current
10µA quiescent current at light loads
Fixed Frequency 1MHz Operation or 750kHz to 1.5MHz Clocked Operation
No Schottky Diode Required
Up to 95% Efficiency (VIN=BP)
Over-current Protection
Over-voltage Protection
Over-temperature Protection
Soft Start
Low Output Noise < 100µVrms
MLP-10, 3 x 3mm Lead-frame, Lead-free Package

Applications

Cell Phones
Cordless Phones
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
WLAN Peripherals
1 Li-Ion or 3 NiMH/NiCd Powered Devices

Packaging

MLP-10

Order Codes

SC190AIMLTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
SC190BIMLTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
SC190CIMLTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
SC190DIMLTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel

Diagrams and Specs

Block Diagram

Click diagram to enlarge

Datasheets and Resources

Datasheets

SC190 Datasheet