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LTC3852 Datasheet(PDF) 32 Page - Linear Technology

Part # LTC3852
Description  Low Input Voltage, Synchronous Step-Down DC/DC Controller
PDF  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3852 Datasheet(HTML) 32 Page - Linear Technology

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LTC3852
32
3852f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
”LINEAR TECHNOLOGY CORPORATION 2010
LT 1010 • PRINTED IN USA
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LTC3736/LTC3736-1/
LTC3736-2
Dual, 2-Phase Synchronous Step-Down Controller
2.75V ≤ VIN ≤ 9.8V, No RSENSE™
LTC3772/LTC3772B
Micropower, No RSENSE Constant Frequency Step-Down
DC/DC Controller
2.75V ≤ VIN ≤ 9.8V, No RSENSE, 40μA No-Load IQ
LTC3776
Dual 2-Phase, No RSENSE Synchronous Controller for DDR/
QDR Memory Termination
2.75V ≤ VIN ≤ 9.8V, VOUT2 Tracks 1/2 VREF
LT3808
No RSENSE, Low EMI, Synchronous DC/DC Controller with
Output Tracking
2.75V ≤ VIN ≤ 9.8V, Spread Spectrum Modulation for Low Noise
LTC3809/LTC3809-1
No RSENSE, Low Input Voltage, Synchronous DC/DC
Controller
2.75V ≤ VIN ≤ 9.8V, Output Tracking (LTC3809-1) or Spread
Spectrum Modulation
LTC3822/LTC3822-1
Low Input Voltage Synchronous Step-Down Controller
2.75V ≤ VIN ≤ 4.5V, No RSENSE
LTC3836
Dual, Low Input Voltage Synchronous Step-Down Controller
2.75V ≤ VIN ≤ 4.5V, No RSENSE
TYPICAL APPLICATIONS
Figure 18. 1.2V/20A Low Ripple DCR Sense Application
C8
1nF
1
2
3
JP1
RUN
R9
12.1k
C5
0.1μF
2.2μF
10V
0603
C1
R5
95.3k
1%
R16
100k
R17
100k
C9
100pF
C11
0.1μF
VIN
INTVCC
PGOOD
ON
OFF
VIN
2.7V TO 5.5V
CIN1
220μF
6.3V
2
L1
0.36μH
CIN5
10μF
16V
1206
COUT1
100μF
6.3V
5
COUT3
470μF/4V
2
VOUT
1.2V/20A
Q1
D1
Q3
C15
4.7μF
10V
C6
0.1μF
C12
0.1μF
+
GND
R8
2.1k
R20
20k
1%
R19
40.2k
1%
GND1
GND2
FB
BG
BOOST
SW
TG
INTVCC
VIN2
VIN1
VPUMP
SENSE–
SENSE+
C–
C+
MODE/
PLLIN
FREQ/PLLFLTR
RUN
TRACK/SS
PGOOD
SHDN
ITH
GND
LTC3852EUDD
3852 F17
CIN1: SANYO 6TPE220MI
COUT1: AVX 12106D107MAT2A
COUT3: SANYO 4TPF470ML
D1: CENTRAL SEMI CMDSH-3
L1: VISHAY IHLP4040DZ-01
Q1, Q3: VISHAY SILICONIX SiR438DP



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