Datasheet LT1431 (Analog Devices) - 9

LT1431
Typical applicaTions 12V to 5V Buck Converter with Foldback Current Limit* Buck Converter Efficiency
PULSE ENGINEERING 80 #PE-51515 V V IN = 9V IN VIN V LT1089 OUT 70 HI-SIDE SWITCH VIN = 12V MBR735 100Ω LOGIC IN GND 0.5W 60 VIN = 15V 5k 1500pF 50 EFFICIENCY (%) 2 1 40 COMP COLL 3 8 V+ REF 30 4 LT1431 7 0 1 2 3 4 5 6 7 8 RTOP RMID I GND-S GND-F LOAD (A) LT1431 TA10 5 6 5V, 7A *CONTACT LTC FOR HIGH EFFICIENCY + 3300µF SWITCHING REGULATORS LT1431 TA09
Isolated 5V to ±15V Flyback Converter Fully Loaded Output Ripple vs Filtering
COILTRONICS C* LT1172 LT1072 CTX02-11934 MUR105 + 4.5V 6, 7 9 TO 5.5V –15V, 70mA 210µF 30mVP-P 40mVP-P 0.47µF 3k C* + 15k L* MUR105 • • + + 6mV 100µF 100µF P-P 8mVP-P 4, 5 2 + 50µF V 10 IN VOUT LT1172 *L BELL INDUSTRIES J.W. MILLER LT1431 TA12 OR DIVISION 9310-36 10µH, 450mA LT1072 MUR105 GND V • C 15V, 70mA 1 + C* 1.5k 3 4N36 13.3k 2.4k 1 V+ 8 MEASURED EFFICIENCY 0.68µF COLL REF LT1172 67.8% AT 2.2WOUT 0.1µF 20k LT1431 LT1072 68.6% AT 2.2WOUT 2 2.7k COMP LT1071 61.1% AT 4.4WOUT GND-S GND-F 5 6 LT1431 TA11 1431fe 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Schematic Diagram Package Description Revision History Package Description Related Parts