介紹一個為手機PA供電的電源SC250

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Step-Down DC-DC Converter with Bias LDO for RF Power Amplifiers
Adjustable output voltage - 0.3 to 3.6V
VOUT linearly proportional to VDAC for increased PA
effi ciency
Pass-through mode automatic and on demand
Input range - 2.7V to 5V
Fast response time - 40μs typical
Regulated output current - 600mA
Maximum bypass load capability - 1A
High effi ciency - 96% Typ at VIN=3.6V, VOUT=3V, 120mA
Constant frequency operation at 1MHz
Shutdown mode <1μA supply current
Internal 75mΩ PMOS bypass transistor
Reference source - 2.85V, 20mA, 1.5%
Very small MLPD-W8, 2.3 x 2.3mm package

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如果需要design application note,請與我聯係victor.zhou@frontek.com.tw, 13564440200