LT1071HVCK datasheet(9/12 Pages) LINER

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10701fe

LT1070/LT1071

TYPICAL APPLICATIONS (Note that maximum output currents are divided by 2 for the LT1071)

Positive Current Boosted Buck Converter

680

Ω

0.33

µF

200pF

*REQUIRED IF INPUT LEADS

≥ 2"

1.24k

5000

µF

VOUT

10A

VIN

28V

VSW

•

VIN

0.47

µF

0.002

µF

470

Ω

1:N

≈ 0.25

LT1070

GND

1070/71 TA19

470

Ω

COMP

LM308

VIN

1.24k

V –

V +

C5*

100

µF

Positive to Negative Buck/Boost Converter

11.3k

1070/71 TA05

VOUT

12V

VIN

– 12V

2.2k

0.22

µF

1.24k

REQUIRED IF INPUT LEADS

≥ 2"

PULSE ENGINEERING 92113

1000

µF

C4*

100

µF

L1**

150

µH

VSW

VIN

LT1070

GND

OPTIONAL

OUTPUT

FILTER

OPTIONAL

INPUT

FILTER

470

Ω

1070/71 TA09

VIN

10V TO 30V

REQUIRED IF INPUT LEADS

≥ 2"

PULSE ENGINEERING 92113

†TO AVOID START-UP

PROBLEMS FOR INPUT

VOLTAGES BELOW 10V,

CONNECT ANODE OF D3

TO VIN AND REMOVE R5.

C1 MAY BE REDUCED FOR

LOWER OUTPUT CURRENTS.

≈ (500µF)(IOUT) FOR 5V

OUTPUTS, REDUCE R3 TO

1.5k, INCREASE C2 TO 0.3

µF

AND REDUCE R6 TO 100

Ω.

VOUT

– 12V

1.24k

0.1

µF

C5*

100

µF

C1†

1000

µF

L1**

200

µH

VSW

VIN

LT1070

R5†

470

Ω

D3†

1N4001

10.7k

Ω

1N914

GND

Negative to Positive Buck/Boost Converter

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