ADP3180 Ver la hoja de datos (PDF) - Analog Devices

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Fabricante

ADP3180

6-Bit Programmable 2-, 3-, 4-Phase Synchronous Buck Controller

Analog Devices 

ADP3180–Typical Performance Characteristics

4

3

2

1

0

0

50

100

150

200

250

300

RT VALUE – k⍀

SEE EQUATION 1 FOR FREQUENCIES NOT ON THIS GRAPH

TPC 1. Master Clock Frequency vs. RT

5.3

TA = 25؇C

4-PHASE OPERATION

5.2

5.1

5.0

4.9

4.8

4.7

4.6

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

MASTER CLOCK FREQUENCY – MHz

TPC 2. Supply Current vs. Master Clock Frequency

TEST CIRCUITS

ADP3180

12V

28 VCC

39k⍀

1k⍀

1.0V

18 CSCOMP

100nF

17 CSSUM

16 CSREF

19 GND

VOS =

CSCOMP – 1V

40

Test Circuit 1. Current Sense Amplifier VOS

ADP3180

12V

28 VCC

10k⍀

200k⍀

⌬V

200k⍀

100nF

1.0V

8 FB

9 COMP

18 CSCOMP

17 CSSUM

16 CSREF

19 GND

⌬VFB = FB⌬V = 80mV – FB⌬V = 0mV

Test Circuit 2. Positioning Voltage

ADP3180

1 VID4

VCC 28

2 VID3

PWM1 27

+

1␮F

6-BIT CODE

3 VID2

4 VID1

PWM2 26

PWM3 25

5 VID0

PWM4 24

6 VID5

SW1 23

7 FBRTN

SW2 22

8 FB

SW3 21

1k⍀

9 COMP

10 PWRGD

SW4 20

GND 19

1.25V

11 EN

12 DELAY

4.7nF 250k⍀ 13 RT

CSCOMP 18

CSSUM 17

CSREF 16

20k⍀

14 RAMPADJ

ILIMIT 15

250k⍀

12V

100nF

100nF

Test Circuit 3. Closed-Loop Output Voltage Accuracy

–6–

REV. 0

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