LTC1159 View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC1159

High Efficiency Synchronous Step-Down Switching Regulators

Linear Technology 

LTC1159

LTC1159-3.3/LTC1159-5

TYPICAL APPLICATIO S

12V

VIN

15V TO 40V

MPSA06

0.33µF

0.1µF

1N4148

1N4148

MPSA56

+

10µF

1

P-GATE

CAP 16

0.15µF

2

VIN

15

SHDN2

3

VCC

14

EXTVCC

4

P-DRIVE

13

N-GATE

5

LTC1159-5

12

VCC

PGND

6

CT

SGND 11

750pF

0.047µF

470Ω

7

ITH

8 SENSE–

SHDN1 10

SENSE+ 9

*HURRICANE LAB HL-KK122T/BB

**DALE LVR-3-0.01

1N4148

MPSA56

SMP40P06

HEAT SINK

+ 1200µF

50V × 2

LXF

1µF

WIMA

L*

22µH

RSENSE**

1 0.01Ω 2

3

4

VOUT

5V/10A

MTP75N05HD MBR350

+ 220µF

10V × 3

OS-CON

SHUTDOWN

1000pF

18k

100Ω

100Ω

LTC1159 • F12

Figure 12. High Current, High Efficiency 15V to 40V Input 5V/10A Output Regulator

VIN

15V TO 40V

1N4148

1N4148

+ 100µF

63V × 2

Si4401DY

SXC

1µF

WIMA

1

P-GATE

CAP 16

0.1µF

0.15µF

2

VIN

3

VCC

SHDN2 15

14

EXTVCC

4

P-DRIVE

N-GATE 13

+

3.3µF

5

VCC

6

CT

LTC1159

12

PGND

SGND 11

390pF

7

ITH

10

VFB

3300pF 8 SENSE–

SENSE+ 9

470Ω

5M

L*

50µH

RSENSE**

1 0.02Ω 2

VOUT

3

4

12V/5A

Si4840DY

MBR350

100pF

1000pF

10.5k 90.9k

1%

1%

100Ω

100Ω

+ 150µF

16V × 2

OS-CON

LTC1159 • F13

VN2222LL

0V = NORMAL

>3V = SHUTDOWN

*COILTRONICS CTX50-5-KM

**IRC LO-3-0.02 ±5%

Figure 13. High Efficiency 15V to 40V Input 12V/5A Output Regulator

17

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