16

LTC1159

LTC1159-3.3/LTC1159-5

Figure 10. High Efficiency 8V to 20V Input 2.5/5A Output Regulator

4

3

2

1

P-GATE

P-DRIVE

CAP

SHDN2

N-GATE

PGND

SGND

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

LTC1159

0.15

µF

SHUTDOWN

0.1

µF

1N4148

1N4148

1000pF

2k

10k

10k

1%

0.047

µF

3.3

µF

1000pF

100pF

100

Ω

100

Ω

IRF7201

IRF7201

MBRS330

1

µF

WIMA

47

µF

25V

× 2

OS-CON

8V TO 20V

5V

L*

15

µH

0.02

Ω

330

µF

6.3V

× 3

AVX

LTC1159 • F10

2.5V/5A

*MAGNETICS 77120-A7 CORE, 16T 18GA. WIRE

**KRL SL-1-R020J

IRF7205

10k

1%

+

+

+

Figure 11. 5:1 Input Range (4V to 20V) High Efficiency 3.3V/2.5A Regulator

4

3

2

1

P-GATE

P-DRIVE

CAP

SHDN2

N-GATE

PGND

SGND

SHDN1

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

LTC1159-3.3

0.15

µF

0.1

µF

1N4148

1N4148

270pF

1k

3300pF

1

µF

0.01

µF

1

µF

SHUTDOWN

Si9410DY

MBRS130LT3

0.1

µF

47

µF

25V

OS-CON

4V TO 20V

L*

20

µH

0.04

Ω

330

µF

6.3V

× 2

AVX

LTC1159 • F11

3.3V/2.5A

*COILTRONICS CTX20-4

**KRL SL-1/2-R040J

Si9435DY

VN2222LL

BAT85

BAT85

BAT85

0.22

µF

+

+

+

+

TYPICAL APPLICATIO S