Datasheet LT1931, LT1931A (Analog Devices) - 9

LT1931/LT1931A
U TYPICAL APPLICATIO S 5V to –12V Inverting Converter Efficiency
C2 100 L1A L1B 1µF 10µH 10µH 95 VIN 5V 90 D1 85 VIN SW VOUT –12V 80 SHDN R1 150mA 75 C1 LT1931 84.5k 4.7µF C3 NFB 70 10µF EFFICIENCY (%) GND R2 65 10k 60 55 C1: TAIYO YUDEN X5R JMK212BJ475MG 1931 TA02 50 C2: TAIYO YUDEN X5R TMK316BJ105ML 0 25 50 75 100 125 150 C3: TAIYO YUDEN X5R EMK325BJ106MM LOAD CURRENT (mA) D1: ON SEMICONDUCTOR MBR0520 L1: SUMIDA CLS62-100 1931 TA03
5V to – 5V Inverting Converter Using Uncoupled Inductors
C2 L1 L2 1µF 10µH 10µH VIN 5V D1 VIN SW VOUT –5V SHDN R1 300mA C1 LT1931 29.4k 220pF 4.7µF C3 NFB 22µF GND R2 10k C1: TAIYO YUDEN X5R JMK212BJ475MG 1931 TA04 C2: TAIYO YUDEN X5R LMK212BJ105MG C3: TAIYO YUDEN X5R JMK212BJ226MM D1: ON SEMICONDUCTOR MBR0520 L1, L2: MURATA LQH3C100K04
2.2MHz, 5V to – 5V Inverting Converter Efficiency
C2 L1 L2 80 1µF 4.7µH 4.7µH VIN 5V 75 D1 VIN SW VOUT 70 –5V SHDN R1 300mA C4 C1 LT1931A 28.7k 180pF 65 4.7µF C3 NFB 4.7µF GND R2 EFFICIENCY (%) 60 10k 55 C1: TAIYO YUDEN X5R JMK212BJ475MG 1931 TA05a 50 C2: TAIYO YUDEN X5R LMK212BJ105MG 0 50 100 150 200 250 300 350 C3: TAIYO YUDEN X5R JMK212BJ475MG D1: ON SEMICONDUCTOR MBR0520 LOAD CURRENT (mA) L1, L2: MURATA LQH3C4R7M24 1931 TA05b 1931fa 9