产品
电源管理
Semtech SC195F
3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
The SC195F is a high efficiency, 500mA step down regulator designed to operate with an input voltage range of 2.9V to 5.5 V. The input voltage range makes it ideal for battery operated applications with space limitations. The SC195F operates at a fixed 3.5MHz switching frequency in normal PWM (Pulse-Width Modulation) mode. The SC195F also includes fifteen 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.
概览
Features
- Input Voltage — 2.9V to 5.5V
- Output Voltage — 0.8V to 3.3V
- Output current capability — 500mA
- Efficiency up to 94%
- 15 Programmable output voltages
- Fast transient response
- Oscillator frequency — 3.5MHz
- 100% duty cycle capability
- Quiescent current — 4.8 mA typ
- Shutdown Current — 0.1μA typ
- Internal soft-start
- Over-voltage protection
- Current limit and short circuit protection
- Over-temperature protection
- Input under-voltage lockout
- Floating control pin protection
- MLPQ-UT8 1.5 x 1.5 x 0.6 (mm) package
- Pb free, halogen free, and RoHS/WEEE compliant
应用
- 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-UT8 - 1.5 x 1.5 x 0.6 mm package
Order Codes
- SC195FULTRT - Pb free, halogen free, and RoHS/WEEE compliant, 3,000 pcs
- SC195FEVB - Pb free, halogen free, and RoHS/WEEE compliant, 3,000 pcs.
Diagrams and Specs
Block Diagram
Click diagram to enlarge