LTC3851 LINER [Linear Technology], LTC3851 Datasheet - Page 28

• Manufacturer Part Number: LTC3851
• Description: Synchronous Step-Down Switching Regulator Controller
• Manufacturer: LINER [Linear Technology]

LTC3851
TYPICAL APPLICATION
RELATED PARTS
28
PART NUMBER
LTC1625/LTC1775
LTC1735
LTC1778
LTC3727A-1
LTC3728
LTC3729
LTC3731
LTC3773
LTC3810
LTC3811
LTC3826/LTC3826-1 Low I
LTC3834/LTC3834-1 Low I
LT
LTC3850
PolyPhase is a registered trademark of Linear Technology Corporation. No R
®
3845
47pF
R
1k
C
4700pF
C
C
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
R
0.1μF
80k
FREQ
1000pF
C
100pF
0.1μF
C2
DESCRIPTION
No R
High Effi ciency Synchronous Step-Down Switching Regulator
No R
Dual, 2-Phase Synchronous Controller
2-Phase 550kHz, Dual Synchronous Step-Down Controller
20A to 200A PolyPhase
3-Phase, 600kHz Synchronous Step-Down Controller
Triple Output DC/DC Synchronous Controller
100V Current Mode Synchronous Nonisolated Switching
Regulator Controller
Dual, PolyPhase Synchronous Step-Down Controller, 20A to 200A Differential Remote Sense Amplifi er, R
Low I
Dual, 2-Phase Synchronous Step-Down Controller
C
SS
●
SENSE
SENSE
Q
Q
Q
FAX: [phone]
MODE/PLLIN
FREQ/PLLFLTR
RUN
TK/SS
I
V
SENSE
SENSE
Dual Synchronous Controllers
Synchronous Step-Down Controllers
Synchronous Step-Down Controller
TH
FB
TM
Wide Input Range Synchronous Step-Down Controller
LTC3851
Current Mode Synchronous Step-Down Controllers
–
+
INTV
BOOST
GND
I
V
SW
LIM
BG
TG
CC
IN
®
Synchronous Controllers
●
+
www.linear.com
Dual Output 15W 3.3V/5V Power Supply
4.7μF
D
CMDSH-3
B
0.1μF
C
B
4.5V TO 28V
V
IN
M1
Si4412DY
M2
Si4412DY
SENSE
•
1
T1A
C
22μF
50V
is a trademark of Linear Technology Corporation.
IN
8
•
2
MBRS140T3
0.01μF
T1B
COMMENTS
97% Effi ciency, No Sense Resistor, 16-Pin SSOP
Output Fault Protection, 16-Pin SSOP
Up to 97% Effi ciency, 4V ≤ V
0.8V ≤ V
Very Low Dropout, V
QFN and SSOP Packages
Expandable from 2-Phase to 12-Phase, Uses All Surface Mount
Components, No Heat Sink
0.6V ≤ V
MOSFET Drivers
3-Phase Step-Down DC/DC Controller, 3.3V ≤ V
Frequency 160kHz to 700kHz
6.2V ≤ V
Tracking and Synchronizable
Sense
4V ≤ V
Single Channel LTC3826/LTC3826-1
4V ≤ V
R
SENSE
7
IN
IN
or DCR Current Sensing
OUT
OUT
IN
CMDSH-3
≤ 36V, 0.8V ≤ V
≤ 60V, 1.23V ≤ V
R
0.01Ω
≤ 100V, 0.8V ≤ V
SENSE
≤ (0.9)(V
≤ 6V, 4.5V ≤ V
4.7k
3851TA06
OUT
IN
C
C
R
T1: BI TECHNOLOGIES HM00-93839
), I
IN
OUT1,2
SENSE
OUT
≤ 14V
: MARCON THCR70EIH226ZT
OUT
© LINEAR TECHNOLOGY CORPORATION 2008
OUT
IN
OUT
MBRS140T3
M3
Si4412DY
R2
62.6k
1%
R1
20k
1%
≤ 10V, 30μA Quiescent Current
IN
: IRC LRF2512-01-R010F
≤ 32V, I
: AVX TPSD107M010R0065
≤ 36V, 120μA Quiescent Current
Up to 20A
≤ 36V,
•
≤ 0.9V
3
+
OUT
SENSE
IN
C
100μF
10V
6
T1C
, No R
≤ 60A, Integrated
OUT1
2
LT 0708 • PRINTED IN USA
+
or DCR Current
SENSE
IN
C
100μF
10V
≤ 36V, Fixed
OUT2
2
,
V
5V
1.5A
V
3.3V
2.5A
OUT2
OUT1
3851f