LTC1143 查看數據表（PDF） - Linear Technology

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LTC1143

Dual High Efficiency SO-16 Step-Down Switching Regulator Controllers

Linear Technology 

LTC1143/LTC1143L

LTC1143L-ADJ

TYPICAL APPLICATIONS

VIN

3.5V TO 10V

VOUT1

3.3V/2A

RSENSE1

0.05Ω

COUT1

220µF

10V

×2

R2

82.5k

1%

R1

49.9k

1%

CIN1

22µF

25V

×2

L1

27µH

0.22µF

P1

1000pF

D1

MBRS130L

100pF

CIN1, CIN2: AVX TPSD226K025R0200

COUT1, COUT2: AVX TPSE227M010R0100

L1: SUMIDA CDRH125-270

L2: PULSE ENGINEERING PE-53718

13

VIN1

4

P-DRIVE 1

1 SENSE+ 1

SENSE– 1

16

LTC1143L-ADJ

2 VFB1

GND1

CT1 ITH1

ITH2

3

14 15

7

0.22µF

5

VIN2

12

P-DRIVE 2

P2

220µF

10V

+

L2A

SENSE+ 2 9

SENSE– 2

8

1000pF

RSENSE2

0.082Ω

VFB2 10

CT2

GND2

100pF

6

11

+

L2B

D2

MBRS130L

R4

150k

1%

R3

49.9k

1%

CIN2

22µF

25V

×2

VOUT2

5V/1A

COUT2

220µF

10V

CT1

300pF

RC1

1k

CC1

3300pF

P1, P2: SILICONIX Si9803DY

RSENSE1: IRC 1206-R050F

RSENSE2: IRC 1206-R082F

Z1: MMBZ5231B

RC2

1k

CC2

3300pF

CT2

180pF

OVERVOLTAGE

PROTECTION

Z1

5.1V

MMBT2222ALT1

1k

1143 F12

Figure 12. Dual 3.3V/5V Buck-Boost Regulator

18

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