ADP1147AR-3.3 查看數據表（PDF） - Analog Devices

零件编号

产品描述 (功能)

生产厂家

ADP1147AR-3.3

High Efficiency Step-Down Switching Regulator Controllers

Analog Devices 

ADP1147-3.3/ADP1147-5

3.3V

0V

(a) Continuous Mode Operation

3.3V

0V

(b) Power Saving Mode

Figure 19. CT Waveforms

VIN

CT

390pF

3300pF

1k⍀

P-CHANNEL L

CIN

D1

1␮F

ADP1147-3.3

VIN

P-DRIVE

CT

GROUND

ITH

SHUTDOWN

SENSE(–) SENSE(+)

SHUTDOWN

RSENSE

COUT

VOUT

GROUND

PLANE

1000pF

Figure 20. Circuit Diagram Indicating the Recommended

Ground Plane Scheme for PCB Layout

VIN

6V TO 14V

D1

1N4148

R5

20k⍀

R6

470⍀

Q1

R7

2N3906 220⍀

Q2

2N2222

C1

1␮F

+

D3

1N4148

Q4

IRF7403

C8

1␮F

+

C2-C4

220␮F/16V

OS-CON

D2

30BQ040

U1

ADP1147-5

Q3

VN2222LL

L1

50␮H

C5

470pF

R1

1k⍀

C6

3.3nF

1 VIN P-DRV 8

2 CT

GND 7

3 ITH

SHD 6

4 SNS– SNS+ 5

C7

2.2nF

R3

100⍀

R4

100⍀

R2

0.02⍀

C9–C11

+

220␮F ؋ 10V

OS-CON

VOUT 5V/3A

Figure 21. 5 V/3 A Regulator Using N-Channel Device

VIN

4V–14V

IRF7204

CIN

1␮F

D1

30BQ040

100␮F

25V

CT

620pF

3300pF

RC

1k⍀

ADP1147-3.3

VIN

P-DRIVE

CT

GND

ITH

SHUTDOWN

SENSE(–) SENSE(+)

L*

50␮H

SHUTDOWN

1nF

RSENSE**

50m⍀

*COILTRONICS

CTX50-4

**KRL SL-1-C1-0R050J

Figure 22. 3.3 V/2 A Regulator

COUT

220␮F

6.3V

X2

VOUT

3.3V/2A

100

95

VIN = 6 VOLTS

90

VIN = 10 VOLTS

85

80

75

70

65

60

1

10

100

1K

10K

LOAD CURRENT – mA

Figure 23. Efficiency vs. Load Current at VO = 3.3 V;

Figure 22 Circuit

–6–

REV. 0

Share Link: