FAN5019 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FAN5019

6-Bit VID Controller 2-4 Phase VRM10.X Controller

Fairchild Semiconductor 

PRODUCT SPECIFICATION

Typical Characteristics

4

3.5

3

2.5

2

1.5

1

0.5

0

0

100

200

300

400

RESISTOR’S RT VALUE (kΩ)

TPC 1. Master Clock Frequency

FAN5019

5.3

5.2 TA = 25°C

4-Phase Operation

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

+12V

39kΩ

1kΩ

1V

100nF

VCC

28

CSCOMP

18

17 CSSUM

CSA

16 CSREF

GND

19

VOS

=

CSCOMP–1V

40

Test Circuit 1. Current Sense Amplifier VOS

+12V

28 VCC

10kΩ

8 FB

9 COMP

200kΩ

200k Ω

18 CSCOMP

100nF

CSSUM

17

CSA

80mV

CSREF

16

GND

19

1V

∆VFB = FB − VVID

Test Circuit 2. Voltage Positioning

4.7nF

VID4

VID3

VID2

VID1

VID0

VID5

FAN5019

1 VID4

VCC 28

2 VID3

PWM1 27

3 VID2

PWM2 26

4 VID1

PWM3 25

5 VID0

PWM4 24

6 VID5

SW1 23

7 FBRTN

SW2 22

8 FB

SW3 21

9 COMP

1kΩ

10 PWRGD

SW4 20

GND 19

11 EN CSCOMP 18

250kΩ

12 DELAY

13 RT

CSSUM 17

CSREF 16

14 RAMPADJ ILIMIT 15

+12V

100nF 1µF

20kΩ

100nF

250kΩ

Test Circuit 3. Closed Loop Output Voltage Accuracy

REV. 1.0.7 1/5/04

9

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