LTC3775 查看數據表（PDF） - Linear Technology
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LTC3775 Datasheet PDF : 34 Pages
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LTC3775
TYPICAL APPLICATION
Wide Input Range CPU Power Supply (Refer to Demo Board DC1290A-B)
VIN = 5V TO 36V
VOUT = 1.2V/10A
VIN
E1
VIN+
FS = 350kHz
VOUT
R8
0Ω
R1
1.62k
R15
0Ω CIN5 0.1μF
50V
C4
4700pF
R5
2k
R4
10k
1%
R9
56.2k
R6
10k
R2
31.6k
1%
C2
R7
0.022μF 1.82k
C3
330pF
RUN
1
2
ILIMT
ILIMB
VIN
LTC3775
BOOST
11
14
3 FB
4
COMP
16
RUN
13
TG
12
SW
SENSE 10
R16
(OPT)
15
MODE
MODE/
SYNC
6
FREQ
5
SS
C6
10nF
SGND
7
INTVCC 9
8
BG
17
PGND
C8 100pF
R3 4.7
C1
0.1μF
INTVCC CMDSH-4E
D2
C5
4.7μF
10V
RSNS1
0.004Ω
RSNS2
(OPT)
RS2 0Ω
INFINEON
BSC093NO4LSG
RS1 (OPT)
BSC016NO4LSG
CIN2
4.7μF
50V
Q1 4
1
CIN3
4.7μF
50V
CIN4
(OPT)
J1
VIN
CIN1
100μF 5V TO 36V
50V
J2
5
GND
Q3
(OPT)
E2
VIN–
23
L1
WURTH
744314110
1.1μH
5
Q2
Q4
(OPT)
4
123
D1
(OPT)
INTVCC
E8
SGND
E6
SYNC
MODE INTVCC
1
PULSE-SKIPPING
2
R13 1k
SYNC
3
FCC
4
MODE
JP1
E7
RUN
VOUT
1
ON
2
OFF
3
JP2
RUN
VIN
R12
(OPT)
C7
(OPT)
R14
(OPT)
VOUT
COUT4
100μF
6.3V
COUT1
470μF
4V
SANYO
POSCAP
4TPF470MU
COUT2
470μF
4V
COUT5
(OPT)
E3
VOUT+
J3
COUT3
1μF
6.3V
X5R
VOUT
1.2V/10A
J4
GND
E4
VOUT–
3775 TA05
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
LTC3854
Small Footprint Wide VIN Range Synchronous Step-Down Fixed 400kHz Operating Frequency, 4.5V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 5.25V,
DC/DC Controller
2mm × 3mm QFN-12
LTC3851A/
LTC3851A-1
LTC3878/
LTC3879
LTC3850/
LTC3850-1/
LTC3850-2
Wide VIN Range Synchronous Step-Down DC/DC Controller
No RSENSE™ Constant On-Time Synchronous Step-Down
DC/DC Controller
Dual 2-Phase, High Efficiency Synchronous Step-Down
DC/DC Controllers, RSENSE or DCR Current Sensing and
Tracking
Phase-Lockable Fixed Operating Frequency 250kHz to 750kHz, 4V ≤ VIN ≤ 38V,
0.8V ≤ VOUT ≤ 5.25V, MSOP-16E, 3mm × 3mm QFN-16, SSOP-16
Very Fast Transient Response, tON(MIN) = 43ns, 4V ≤ VIN ≤ 38V,
0.8V ≤ VOUT ≤ 0.9VIN, SSOP-16, MSOP-16E, 3mm × 3mm QFN-16
Phase-Lockable Fixed Operating Frequency 250kHz to 780kHz,
4V ≤ VIN ≤ 30V, 0.8V ≤ VOUT ≤ 5.25V
LTC3860
LTC3853
Dual, Multiphase Synchronous Step-Down DC/DC
Controller with Diff Amp and 3-State Output Drive
Triple Output, Multiphase Synchronous Step-Down DC/DC
Controller, RSENSE or DCR Current Sensing and Tracking
Operates with Power Blocks, DRMOS Devices or External MOSFETs
3V ≤ VIN ≤ 24V, tON(MIN) = 20ns
Phase-Lockable Fixed Operating Frequency 250kHz to 750kHz,
4V ≤ VIN ≤ 24V, VOUT Up to 13.5V
34 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
3775fa
LT 0810 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2009
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