Datasheet LT1070, LT1071 (Linear Technology) - 10

LT1070/LT1071
U TYPICAL APPLICATIONS (Note that maximum output currents are divided by 2 for the LT1071) Voltage Boosted Boost Converter Current Boosted Boost Converter
R4 C3 680Ω R4 C3 0.68µF I D1 VOUT 1W 28V TOTAL N 4A D2 D2 1 INDUCTANCE = 4mH VIN INTERLEAVE PRIMARY VIN VSW L1 VSW AND SECONDARY FOR + N = 5 + R1 LOW LEAKAGE V V IN IN 27k INDUCTANCE 15V LT1070 16V TO 24V LT1070 R1 D1 + 98k V C1 OUT FB 100V FB GND V GND V C C 300mA R3 R2 + C1 R3 R2 10k 1.24k 1.24k 200µF C2 C2 0.047µF 1070/71 TA10 1070/71 TA11
Negative Boost Regulator Negative Input/Negative Output Flyback Converter
D2 • C3 R6 R3 R2 1k 5k V • V IN SW T1 + VIN VSW Q1 1:N C1 R + 2N3906 O R1 LT1070 C1 R1* (MINIMUM + + 27k 1000µF C4* LOAD) LT1070/LT1071 470µF + C3 – VOUT FB GND V 10 C µF FB V GND V OUT – 1.6V C *R1 = R3 R2 200µA 3.3k 1.24k R5 R4 L1 C2 1.24k 200µH 0.22µF D1 V V OUT C2 IN –28V –15V 1070/71 TA17 – V 1A IN *REQUIRED IF INPUT LEADS ≥ 2" 1070/71 TA15
External Current Limit External Current Limit
VIN VSW VX LT1070/LT1071 LT1070/LT1071 + R2 V = 2V IN FB GND VC GND VC D1 R1 500Ω R1 1k R2 Q1 C1 1070/71 TA04 1000pF C2 R NOTE THAT THE LT1070/LT1071 S GND PIN IS NO LONGER COMMON TO V – IN 1070/71 TA06 10701fe 10