SC250: Step-Down DC-DC Converter with Bias LDO for RF Power Amplifiers
The SC250 is a synchronous step-down converter designed specifically for use as an adaptive voltage supply for CDMA and WCDMA RF Power Amplifiers (PAs).
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- Adjustable output voltage range - 0.3 to 3.6V
- Linearly proportional VDAC to VOUT relationship for increased PA efficiency
- Pass-through mode automatic and on demand
- Input voltage range - 2.7V to 5V
- Typical settling time - 40μs
- Output current capability - 600mA
- Maximum output current in bypass mode - 1A
- Up to 96% effi ciency
- Constant frequency operation - 1MHz
- Less than 1μA shutdown current
- Internal 75mΩ PMOS bypass transistor
- PA bias voltage supply - 2.85V, 20mA, 1.5%
- MLPD-W8, 2.3 x 2.3mm package
- CDMA and WCDMA Phones
- Handheld Radios
- RF PC Cards
- Battery Powered RF Devices
- SC250WLTRT: RoHS and WEEE compliant, 3000 pcs. Tape & Reel
