LT1120A Typical applicaTionsBattery Backup Regulator VOUT 5V BATTERY 5 V 4 5 MAIN IN V 4 OUT VOUT V INPUT IN POWER + LT1120A 0.001µF INPUT 1M 10µF LT1120A FB 2 2 GND FB GND 1 50k 1 1M INTERNAL PARASITIC DIODES OF LT1120A 1120A TA05 VIN VOUT Current Limited 1 Amp Regulator 2.2k 0.5Ω* VIN MJE2955 2N3906* 5 VIN VOUT + 5V AT 1A 0.22µF 1M 220µF† VOUT 4 LT1120A FB 2 GND 270Ω 100k 1 * SETS CURRENT LIMIT BUT INCREASES DROPOUT VOLTAGE BY 0.5V. † MUST HAVE LOW ESR. SEVERAL 100µF CAPACITORS CAN BE PARALLELED. 1120A TA06 1120afb 10 For more information www.linear.com/LT1120A Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Related Parts
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