2017年10月17日 (二) 07:56的版本

1 电源参考

1.1 强弱电转换

主控非隔离电源芯片 F7298 典型应用电路：

1.2 3.3V LDO

1.2.1 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)

1.2.2 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

1.2.3 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 ]

1.2.4 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

1.3 DC-to-DC

1.3.1 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)

1.3.2 BQ27441

• http://www.ti.com/product/bq27441-g1

1.4 12V

220V switch to 12V constant voltage power supply model, rated 12W and 1A current output

• ACT522/ACT520/ACT41x http://www.active-semi.com/products/acdc-converters/secondary-side-regulators/
• OB2263/OB2273 http://www.on-bright.com/cn/english/products_PWM.htm

1.5 3.3V

ESP8266/ESP8285 chip、MY9291/MY9231 chip、SPI Flash chip are all 3.3V power.

1.5.1 MP1470

• Wide 4.7V to 16V Operating Input Range
• Fixed 500kHz Switching Frequency
• Over-Current Protection and Hiccup
• Thermal Shutdown
• Output Adjustable from 0.8V
• Available in a 6-pin TSOT-23 package

1.5.2 MP2359

• Wide 4.5V to 24V Operating Input Range
• 1.2A Peak Output Current
• 0.35Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic Capacitors
• Up to 92% Efficiency
• 0.1μA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Output Adjustable from 0.81V to 15V