lt3740 Linear Technology Corporation, lt3740 Datasheet - Page 20

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lt3740

Manufacturer Part Number
lt3740
Description
Wide Operating Range, Valley Mode, No Rsense Synchronous Step-down Controller
Manufacturer
Linear Technology Corporation
Datasheet

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TYPICAL APPLICATIO
RELATED PARTS
PART NUMBER
LTC1778
LTC1876
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LTC3728L
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LT3740
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
DESCRIPTION
No R
2-Phase, Dual Synchronous Step-Down Switching Controller
Monolithic 3A, 200kHz/500kHz Step-Down Switching Regulator
No R
Dual, 2-Phase Synchronous Step-Down Controller
Wide Operating Range, No R
High Voltage, Wide Input Range, Step-Down Controller With Low I
SENSE
SENSE
, Step-Down Synchronous DC/DC Controller
, Dual, 2-Phase, Synchronous DC/DC Controller
FAX: (408) 434-0507
10k
15k
U
0.47μF
16k
SENSE
22μH
1500pF
www.linear.com
Step-Down Controller
High Efficiency Step-Down Converter
22pF
SWB
V
SHDN
XREF
V
RANGE
IN
C
LT3740
GND
TGATE
BGATE
BGDP
PGND
BIAS
SN
SN
SW
FB
+
HAT2165H
1μF
M2
Q
M1
HAT2168H
COMMENTS
V
I
Current Mode; 20A per Channel
V
V
V
Single Channel, Separate V
V
Drive, 10-Pin MSOP
OUT
IN
IN
IN
IN
IN
: 4V to 36V, Fast Transient Responds, Current Mode,
: 5.5V to 60V, 0.1Ω Saturation Switch, 16-Lead SSOP Package
: 4V to 36V, Current Mode, Up/Down Tracking, Synchronizable
: 4V to 36V, 550kHz, PLL: 250kHz to 550kHz
: 4V to 60V, I
≤ 20A
D1
B340A
3.4μH
20μF
V
7V to 20V
IN
2k
Q
22pF
= 40μA, 100% Duty Cycle, 2A P-Channel Gate
255k
80.6k
3740 TA04
ON
100μF
× 3
© LINEAR TECHNOLOGY CORPORATION 2006
V
3.3V
10A
OUT
Programming
LT 0407 REV A • PRINTED IN USA
3740fa

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