ADP3181JRUZ-REEL View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

ADP3181JRUZ-REEL

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

ON Semiconductor 

TEST CIRCUITS

ADP3181

1 VID4

VCC 28

2 VID3

PWM1 27

+ 1µF

5-BIT CODE

3 VID2

4 VID1

PWM2 26

PWM3 25

5 VID0

PWM4 24

6 CPUID

SW1 23

7 FBRTN

SW2 22

8 FB

SW3 21

9 COMP

1kΩ

10 PWRGD

SW4 20

GND 19

1.25V

11 EN

12 DELAY

CSCOMP 18

20kΩ

CSSUM 17

12nF

250kΩ 13 RT

CSREF 16

14 RAMPADJ ILIMIT 15

250kΩ

12V

100nF

100nF

Figure 2. Closed-Loop Output Voltage Accuracy

12V

39kΩ

1kΩ

1.0V

ADP3181

VCC

28

CSCOMP

18

100nF

CSSUM

17

CSREF

16

GND

19

VOS

=

CSCOMP–1V

40

Figure 3. Current Sense Amplifier VOS

ADP3181

ADP3181

VCC

12V

28

10kΩ

FB

8

COMP

9

200kΩ

∆V

1.0V

200kΩ

100nF

CSCOMP

18

CSSUM

17

CSREF

16

GND

19

∆VFB = FB∆V = 80mV – FB∆V = 0mV

Figure 4. Positioning Voltage

Rev. 0 | Page 5 of 24

Share Link: