Datasheet
12
LTC4440
4440f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2003
LT/TP 1004 1K • PRINTED IN USA
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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Internal Charge Pump
LT
®
1161 Quad Protected High Side MOSFET Driver 8V to 48V Supply Range, t
ON
= 200µs, t
OFF
= 28µs
LTC1163 Triple 1.8V to 6V High Side MOSFET Driver 1.8V to 6V Supply Range, t
ON
= 95µs, t
OFF
= 45µs
LT1339 High Power Synchronous DC/DC Controller Current Mode Operation Up to 60V, Dual N-Channel Synchronous Drive
LTC1535 Isolated RS485 Transceiver 2500V
RMS
of Isolation Between Line Transceiver and Logic Level Interface
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IN
≤ 13.2V
LT3010/LT3010-5 50mA, 3V to 80V Low Dropout Micropower Regulators Low Quiescent Current (30µA), Stable with Small (1µF) Ceramic Capacitor
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Architecture, 16-Pin Exposed Pad TSSOP Package
LTC3722-1/ Synchronous Dual Mode Phase Modulated Full-Bridge Adaptive Zero Voltage Switching, High Output Power Levels
LTC3722-2 Controllers (Up to Kilowatts)
LTC3723-1/ Synchronous Push-Pull PWM Controllers Current Mode or Voltage Mode Push-Pull Controllers
LTC3723-2
LT3781/LTC1698 36V to 72V Input Isolated DC/DC Converter Chip Set Synchronous Rectification; Overcurrent, Overvoltage, UVLO Protection;
Power Good Output Signal; Voltage Margining; Compact Solution
LT3804 Secondary Side Dual Output Controller with Opto Driver Regulates Two Secondary Outputs, Optocoupler Feedback Divider and
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LTC3900 Synchronous Rectifier Driver for Forward Converters Programmable Time Out, Reverse Inductor Current Sense
LTC3901 Secondary Side Synchronous Driver for Push-Pull and Programmable Time Out, Reverse Inductor Current Sense
Full-Bridge Converters
LTC4441 6A MOSFET Driver Adjustable Gate Drive from 5V to 8V, 5V ≤ V
IN
≤ 28V
TYPICAL APPLICATIO
U
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
8913
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
19
5
4
16
10k
120Ω
30.1k
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
41013 7
1µF
1µF
4440 TA04
–V
OUT
10V
MMBZ5240B
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
–
65
ME ME2
23 16
MMBT3904
Si7852DP
×2
L1
0.56µH
72
4
CS
+
T2
70(980µH):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
T3: PULSE PA0785
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