Datasheet

LTC3707-SYNC
32
3707sfa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2002
LT 0508 REV A • PRINTED IN USA
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TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
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SENSE
TM
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LTC1628-SYNC Higher Voltage and Higher Accuracy Specifi ed LTC3707-SYNC V
IN
up to 36V, 1% V
OUT
Accuracy
LTC1629/
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20A to 200A PolyPhase
TM
Synchronous Controllers Expandable from 2-Phase to 12-Phase, Uses All
Surface Mount Components, No Heat Sink
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SENSE
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with 5-Bit Mobile VID Control
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®
III Processors, 550kHz,
V
IN
≤ 7V
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IN
≤ 36V, VID Sets V
OUT1
, PGOOD
LT1709/
LT1709-8
High Effi ciency, 2-Phase Synchronous Step-Down Switching Regulators
with 5-Bit VID
1.3V ≤ V
OUT
≤ 3.5V, Current Mode Ensures
Accurate Current Sharing, 3.5V ≤ V
IN
≤ 36V
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3.5V ≤ V
IN
≤ 36V
LTC1929/
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2-Phase Synchronous Controllers Up to 42A, Uses All Surface Mount Components,
No Heat Sinks, 3.5V ≤ V
IN
≤ 36V
LTC3707 Includes Standby Mode Function V
IN
up to 36V, PGOOD
Adaptive Power, No R
SENSE
and PolyPhase are trademarks of Linear Technology Corporation.
Figure 14. Multioutput Multiphase Application
PHASMD
CLKOUT
TG1
TG2
0°
I
1
I
3
I
2
I
4
90°
OPEN
180°
U1
LTC1629
BUCK: 2.5V/15A
BUCK: 2.5V/15A
PLLIN
TG1
TG2
90°
90°
270°
U2
LTC3707-SYNC
BUCK: 1.5V/15A
2.5V
O
/30A
C
IN
I
IN
12V
IN
*INPUT RIPPLE CURRENT CANCELLATION
INCREASES THE RIPPLE FREQUENCY AND
REDUCES THE RMS INPUT RIPPLE CURRENT
THUS, SAVING INPUT CAPACITORS
I
IN
*
1.5V
O
/15A
1.8V
O
/15A
3707 F14
BUCK: 1.8V/15A
I
1
I
2
I
3
I
4