Products
Power Management
Semtech SC197
3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator
The SC197 contains two identical high efficiency 500mA step-down regulators designed for use in battery-powered applications. Each regulator includes 15 programmable output voltage settings that can be selected using the four control pins, eliminating the need for external feedback resistors. The output voltage can be fixed to a single setting or dynamically switched between different levels. Pulling all four control pins low disables the output.
Overview
Features
- Input Voltage — 2.9V to 5.5V
- Output Voltage — 0.8V to 3.3V
- Output current capability — 500mA per regulator
- Efficiency up to 94%
- Programmable output voltages — 15
- High light-load efficiency via automatic PSAVE mode
- Fast transient response
- Oscillator frequency — 3.5MHz
- 100% duty cycle capability
- Quiescent current — 38μA typical per regulator
- Shutdown current — 0.1μA typical per regulator
- Internal soft-start
- Over-voltage protection
- Current limit and short circuit protection
- Over-temperature protection
- Under-voltage lockout
- Floating control pin protection
- MLPQ-UT18 2.0 x 3.0 x 0.6 (mm) package
- Lead-free, halogen-free, and RoHS/WEEE compliant
Applications
- Smart phones and cellular phones
- MP3/Personal media players
- Personal navigation devices
- Digital cameras
- Single Li-ion cell or 3 NiMH/NiCd cell devices
- Devices with 3.3V or 5V internal power rails
Packaging
MLPQ-UT18 2.0 x 3.0 x 0.6 (mm)
Order Codes
SC197ULTRT: MLPQ-UT18 2 x 3
SC197EVB: Evaluation Board
Diagrams and Specs
Block Diagram
Click diagram to enlarge