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LTC1514-5 Datasheet(PDF) 7 Page - Linear Technology |
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LTC1514-5 Datasheet(HTML) 7 Page - Linear Technology |
7 / 8 page 7 LTC1514-3.3/LTC1514-5 APPLICATIONS INFORMATION resistor divider (see Figure 2). Since the low-battery comparator is kept alive in shutdown, it may be used to protect batteries against deep discharge by shutting down the power supply when the battery voltage gets too low. The open-drain comparator output allows for flex- ible interfacing between the LBO output and external logic. LBO pull-up resistors in the 50k to 1M range are recommended. TYPICAL APPLICATIONS N 3.3V Step-Up/Step-Down Supply with Power Good Output 1 2 3 4 8 7 6 5 SHDN LBO LBI GND VOUT VIN C1+ C1– LTC1514-3.3 VOUT = 3.3V ±4% IOUT = 15mA, VIN > 2V IOUT = 50mA, VIN > 3V VIN 2V TO 8V 0.22 µF 499k 1% 10 µF 10 µF 806k 1% 100k 1514 TA05 ON OFF POWER GOOD 3V VTRIP + + Low Power Battery Backup Supply with Autoswitchover and No Reverse Current 1 2 3 4 8 7 6 5 SHDN LBO LBI GND VOUT VIN C1+ C1– LTC1514-5 5V BACKUP SUPPLY IOUT = 15mA 0.1 µF 499k MAIN 5V SUPPLY 10 µF 10 µF 3-CELL NiCd BATTERY TRICKLE CHARGE AND LTC1514 IDD 499k 1% 1.5M 1% 499k 1514 TA03 4.6V VTRIP TP0610T + + BACKED-UP CIRCUITRY BAT54 1 2 3 4 8 7 6 5 SHDN LBO LBI GND VOUT VIN C1+ C1– LTC1514-5 MBR0520L 0.22 µF CHARGE PATH 499k 1% 3-CELL NiCd BATTERY 499k 1M 1% 6V WALL ADAPTER INPUT 1514 TA06 EXTERNAL POWER GOOD 5V ON OFF 10 µF + 22 µF + Battery/External Power Autoswitch Regulator Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. |
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