12

LT1160/LT1162

Figure 5. 90% Efficiency, 40V to 5V 10A Low Dropout Current Mode Switching Regulator

+

+

+

+

6800pF

100pF

10k

18k

18k

10k

2k

1k

1k

5k

25k

500k

5V

5400

µF

LOW ESR

1160/62 F05

0.1

µF

10

µF

2.2

µF

+

1

µF

0.1

µF

330k

12V

1N4148

1N4148

1N4148

4700pF

IRFZ44

IRFZ44

MBR340

* HURRICANE LAB

HL-KM147U

IRFZ44

60V

MAX

2200

µF EA

LOW ESR

0.007

Ω

L*

47

µH

f = 40kHz

14

13

12

11

10

9

8

1

2

3

4

5

6

7

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

BOOST

T GATE DR

T GATE FB

T SOURCE

B GATE DR

B GATE FB

LT1160

IN TOP

IN BOTTOM

UV OUT

SGND

PGND

NC

+

2N2222

LT1846

** DALE TYPE LVR-3

ULTRONIX RCS01

+

+

+

+

+

2.2nF

27k

0.1

µF

1k

1k

5k

2k

5V

5400

µF

LOW ESR

1160/62 F04

0.1

µF

10

µF

1

µF

1

µF

0.1

µF

0.022

µF

C1

0.1

µF

360

Ω

510

Ω

4.7k

0.33

µF

330k

12V

1N4148

1N4148

1N4148

IRFZ44

IRFZ44

MBR340

* MAGNETICS CORE #55585-A2

30 TURNS 14GA MAGNET WIRE

IRFZ44

60V MAX

2200

µF EA

LOW ESR

0.007

Ω

L*

70

µH

4.7k

f = 25kHz

14

13

12

11

10

9

8

1

2

3

4

5

6

7

1

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

11

10

BOOST

T GATE DR

T GATE FB

T SOURCE

B GATE DR

B GATE FB

LT1160

IN TOP

IN BOTTOM

UV OUT

SGND

PGND

NC

SHUTDOWN

+

2N2222

LT3526

** DALE TYPE LVR-3

ULTRONIX RCS01

Figure 4. 90% Efficiency, 40V to 5V 10A Low Dropout Voltage Mode Switching Regulator