ADP3188 Просмотр технического описания (PDF) - Analog Devices

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ADP3188

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

Analog Devices 

TEST CIRCUITS

ADP3188

1 VID4

VCC 28

2 VID3

PWM1 27

+1µF

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

9 COMP

1k Ω

10 PWRGD

SW4 20

GND 19

1.25V

12nF 250kΩ

11 EN

12 DELAY

13 RT

CSCOMP 18

20kΩ

CSSUM 17

CSREF 16

14 RAMPADJ

ILIMIT 15

250kΩ

12V

100n F

100nF

Figure 2. Closed-Loop Output Voltage Accuracy

ADP3188

12V

39kΩ

1kΩ

1.0V

ADP3188

VCC

28

CSCOMP

18

100nF

CSSUM

17

CSREF

16

GND

19

VOS =

CSCOMP – 1V

40

Figure 3. Current-Sense Amplifier VOS

12V

10kΩ

200kΩ

200kΩ 100nF

∆V

1.0V

ADP3188

VCC

28

FB

8

COMP

9

CSCOMP

18

CSSUM

17

CSREF

16

GND

19

∆VFB = FB∆V = 80mV – FB∆V = 0mV

Figure 4. Positioning Voltage

Rev. A | Page 5 of 28

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