LTC3776 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC3776

Dual 2-Phase, No RSENSE™, Synchronous Controller for DDR/QDR Memory Termination

Linear Technology 

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TYPICAL APPLICATIO S

LTC3776

VIN

5V

CIN

10µF

×2

RFB1A

59k

RFB1B

187k

CITH1A

100pF

CITH1

RITH1

22k

1000pF

RVIN 10Ω

22

SW1

SENSE1+ 21

MP1

23

24

1

2

IPRG1

PGND

VFB1

BG1

ITH1 SYNC/SSEN

IPRG2

TG1

20

19

18

17

3 PLLLPF

4 SGND

PGND 16

TG2 15

5

LTC3776EUF

VIN

RUN/SS

14

13

CITH2

CVIN 2.2nF

1µF

RITH2

6.2k

9

7

8

6

PGOOD

VFB2

ITH2

VREF

BG2

PGND

SENSE2+

12

11

SW2 10

PGND

MP2

CSS

10nF

CITH2B

25

330pF

L1

1.5µH

MN1

Si7540DP

VDDQ

2.5V

5A

COUT1

100µF

MN2

Si7540DP

L2

1.5µH

COUT2

100µF VTT

1.25V

±5A

3776 F14

Figure 14. 2-Phase, 550kHz, DDR Memory Supplies

3776f

23

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