LTC4440
16
4440fb
For more information www.linear.com/LTC4440
LINEAR TECHNOLOGY CORPORATION 2003
LT 0215 REV B • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC4440
RELATED PARTS
TYPICAL APPLICATION
LTC3723-2/LTC4440/LTC3901 240W 42V-56V
IN
to Unregulated 12V Half-Bridge Converter
5
46
A
B
11V12VV
IN
MMBT3904
15
LTC3723EGN-2
DRVB
SDRB
SDRA
COMP
V
CC
UVLO
12
62k
330pF
12V
MMBZ5242B
150pF
1
0.47µF
1µF
DRVA
DPRG V
REF
RAMP SPRG GND SSCS FBC
T
470pF
0.47µF
4.7k
0.22µF
2N7002
B
CS
+
T3
1(1.5mH):0.5
T1
5:4:4:2:2
1µF
89 13
1k
22Ω
0.1µF
C1
2.2nF
250V
1µF
100V
1µF
100V
1µF
100V
1µF
100V
0.22µF
Si7370DP
×2
Si7852DP
×2
1
6
5
42
3
A
Si7370DP
×2
1500pF
100V
L2 0.22µH
L3
1mH
C3
68µF
V
F
•
•
11
3
2
8
1 9
5
4
16
10k
120Ω
7 10 14
7.5Ω
D4 D5
7.5Ω
220pF
100Ω
10k 3k
4.7k
1/4W
100pF
215k
15k
1/4W
SYNC PV
CC
CSF
+
V
F
LTC3901EGN
CSF
–
8
11 12
1
4 10 13 7
1µF
1µF
4440 TA04
–V
OUT
10V
1k
V
OUT
MF MF2
GND PGND GND2 PGND2 TIMER
V
CC
330pF
14 15
10k 3k
33.2k 100Ω
4.7k
1/4W
CSE
+
V
E
20Ω 1W
–V
OUT
V
OUT
V
OUT
–V
OUT
CSE
–
6 5
ME ME2
2 3 16
MMBT3904
Si7852DP
×2
0.56µH
72
4
CS
+
T2
70(980H):1
8
7
1
3
12V
D2
D1
D3
3
5
1
6
•
••
•
•
•
•
9
11
V
E
+
LTC4440ES6
BOOSTINP
TG
TSGND
V
CC
11V
1µF
100V
V
IN
V
IN
–V
IN
48V
IN
1µF
100V
C2
180µF
16V
+
1µF
1µF, 100V TDK C4532X7R2A105M
C1: MURATA DE2E3KH222MB3B
C2: SANYO 16SP180M
C3: AVX TPSE686M020R0150
D1-D3: BAS21
D4, D5: MMBD914
L1: COILCRAFT DO1813P-561HC
L2: SUMIDA CDEP105-0R2NC-50
L3: COILCRAFT DO1608C-105
T1: PULSE PA0801.005
T2: PULSE P8207
PART NUMBER DESCRIPTION COMMENTS
LT C 4441 6A N-Channel MOSFET Gate Driver Up to 25V Supply Voltage, Adjustable Gate Drive Voltage from 5V to 8V
LT 1910 Protected High Side MOSFET Driver Up to 48V/60V Surge Supply Voltage, Adjustable Current Limit
LT C 4442 High Speed Synchronous N-Channel MOSFET Driver Up to 38V Supply Voltage, 6V ≤ V
CC
≤ 9.5V
LT C 4449 High Speed Synchronous N-Channel MOSFET Driver Up to 38V Supply Voltage, 4.5V ≤ V
CC
≤ 6.5V
LT C 4444/
LT C 4444-5
High Voltage Synchronous N-Channel MOSFET Driver
with Shoot-Through Protection
Up to 100V Supply Voltage, 4.5V/7.2V ≤ V
CC
≤ 13.5V, 3A Peak Pull-
Up/0.55Ω Peak Pull-Down
LT C 4446 High Voltage Synchronous N-Channel MOSFET Driver
without Shoot-Through Protection
Up to 100V Supply Voltage, 7.2V ≤ V
CC
≤ 13.5V, 3A Peak Pull-Up/0.55Ω
Peak Pull-Down
LT C 1154 High Side Micropower MOSFET Driver Up to 18V Supply Voltage, 85μA Quiescent Current, Internal Charge Pump
LT C 1155 Dual High Side Micropower MOSFET Driver Up to 18V Supply Voltage, 85μA Quiescent Current, Internal Charge Pump
LT C 3900 Synchronous Rectifier Driver for Forward Converters Pulse Transformer Synchronous Input
LT C 3901 Synchronous Rectifier Driver for Push-Pull and Full-
Bridge Converters
Pulse Transformer Synchronous Input
LT C 3722-1/
LT C 3722-2
Synchronous Phase Modulated Full-Bridge Controllers Adjustable Synchronous Rectification Timing for Highest Efficiency
LT C 3723-1/
LT C 3723-2
Synchronous Push-Pull and Full-Bridge Controllers
High Efficiency with On-Chip MOSFET Drivers
