FAN5018B Просмотр технического описания (PDF) - Fairchild Semiconductor

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FAN5018B

6-Bit VID Controller 2-4 Phase VR10.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

FAN5018B

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

200kΩ

200kΩ

80mV

1V

8 FB

9 COMP

18 CSCOMP

100nF

CSSUM

17

CSA

CSREF

16

GND

19

ΔVFB = FB − VVID

4.7nF

VID4

VID3

VID2

VID1

VID0

VID5

FAN5018B

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

100nF

+12V

1μF

20kΩ

100nF

250kΩ

Test Circuit 2. Voltage Positioning

Test Circuit 3. Closed Loop Output Voltage Accuracy

REV. 1.0.0 Jul/15/05

9

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