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== 电源参考 == === 强弱电转换 === 主控非隔离电源芯片 F7298 典型应用电路: [[文件:F7298.refer.sch.png]] <br><br> === 3.3V LDO === ==== WL2803E ==== ;;Feature: * 500mA CMOS LDO * Ultra low dropout, 130mV (Typ.) @ 500mA load current * The quiescent current is typically 150uA * Vin MAX = 6.5V * SOT23-5 small package * Output 3.3V is marking WS33/YYWW (YY - Year code, WW - Week code) [[文件:Wl2803-pin-app.png]] <br><br> ==== AP2112 ==== ;;Feature: * 600mA CMOS LDO * Low Dropout Voltage (3.3V): 250mV (Typ.) @ 600mA * Low Quiescent Current: 55μA (Typ.) * Low Standby Current: 0.01μA (Typ.) * Vin MAX = 6.5V * Provides SOT-23-5, SOT-89-5, and SOIC-8 packages [[文件:AP2112-pin-app.png]] <br><br> ==== WL2803G ==== 需要低 dropout voltage 的场合,替换 AMS1117 ;;Feature: * 1000mA CMOS LDO * Dropout voltage : 260mV @ Iout = 800mA load current * The quiescent current is typically 150uA * Vin MAX = 6.5V * SOT-223-3L package * Output 3.3V is marking 2803G**/YYWW [ ** - Voltage code (33: 3.3V), YY - Year code, WW - Week code ] [[文件:Wl2803g-pin-app.png]] <br><br> ==== AMS1117-3.3 ==== ;;Feature: * 1000mA LDO * Dropout voltage : 1.1V @ Iout = 800mA load current * The quiescent current is typically 5mA * Vin MAX = 15V * SOT-223-3L package [[文件:AMS1117-pin.png]] <br><br> === DC-to-DC === ==== TPS63001 ==== * Input Voltage Range: 1.8 V to 5.5 V * Fixed and Adjustable Output Voltage Options from 1.2 V to 5.5 V * Up to 96% Efficiency * 1200-mA Output Current at 3.3 V in Step-Down Mode (VIN = 3.6 V to 5.5 V) * Up to 800-mA Output Current at 3.3 V in Boost Mode (VIN > 2.4 V) * Automatic Transition Between Step-Down and Boost Mode * Device Quiescent Current less than 50 μA * Power-Save Mode for Improved Efficiency at Low Output Power * Load Disconnect During Shutdown * Overtemperature Protection * Small 3mm × 3mm 10-Pin VSON Package (QFN) [[文件:TPS63001-APP-SCH.png]] [[文件:TPS63001-APP-Layout.png]] <br><br> ==== BQ27441 ==== * http://www.ti.com/product/bq27441-g1 <br><br>
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