LTC3776EUF View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC3776EUF

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

Linear Technology 

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TYPICAL APPLICATIO S

LTC3776

VIN

3.3V

CIN

22µF

RFB1A

59k

CFF1

100pF

RFB1B

187k

CITH1

220pF

CLP

10nF

RITH1

15k

RLP

15k

RVIN 10Ω

CITH2

CVIN 220pF

1µF

RITH2

15k

1

SW1

SENSE1+ 24

2

3

4

5

6

IPRG1

PGND

VFB1

BG1

ITH1 SYNC/SSEN

IPRG2

TG1

PLLLPF PGND

23

22

21

20

19

7 SGND

TG2 18

5 LTC3776EGN 17

VIN

RUN/SS

12

10

11

9

PGOOD

VFB2

ITH2

VREF

BG2

PGND

SENSE2+

16

15

14

SW2 13

CLK IN

MP1

MP2

SW1

MN1

Si7540DP

L1

1.5µH

D1 +

VDDQ

2.5V

4A

COUT1

150µF

MN2

Si7540DP

SW2

D2

L2

1.5µH

COUT2

150µF VTT

1.25V

±4A

COUT1, COUT2: SANYO 4TPB150MC

D1, D2: OPTIONAL SCHOTTKY DIODES

L1, L2: VISHAY IHLP-2525CZ-01

3736 F16

Figure 16. 2-Phase, Synchronizable, DDR Memory Supplies

3776f

25

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