LT1737IGN#TR Linear Technology, LT1737IGN#TR Datasheet - Page 28

• Manufacturer Part Number: LT1737IGN#TR
• Description: IC CNTRLR ISOLATD FLYBACK 16SSOP
• Manufacturer: Linear Technology
• Type: Flybackr

Specifications of LT1737IGN#TR

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Frequency - Switching: 50kHz ~ 250kHz
• Voltage - Input: 4.1 ~ 20 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Voltage - Output: -
• Power - Output: -
• Other names: LT1737IGNTR

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28
TYPICAL APPLICATIO S
PART NUMBER
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
C9
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R8
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R9
33k
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●
FAX: [phone]
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C6
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DESCRIPTION
Isolated Flyback Switching Regulator
Isolated Flyback Switching Regulator
Isolated Flyback Switching Regulator
Ultralow Noise 1A Switching Regulator
General Purpose Isolated Flyback Controller
Ultra Low Noise DC/DC Controller
SFST
OUT
9
3
C8
0.1µF
25V
Z5U
UVLO
t
ON
14
10
R5
33k
5%
ENDLY
8
3
U
L1, L2: COILTRONICS UP4B-150 INDUCTOR
M1: INT’L RECTIFIER IRLZ34S 60V, 0.05Ω LOGIC LEVEL N-CH MOSFET
R1: IRC 4 × 0.1Ω, 1W (LR2512)
13
R6
24k
5%
INP
GND
MINENAB
LT1121
●
Figure 18. 8V-16V to 12V Nonisolated Converter
U2
www.linear.com
LT1737
OUT
12
ADJ
R7
100k
5%
90
80
50
40
30
20
70
60
0.01
R
1
2
OCMP
4
Figure 19. Efficiency vs I
R12
24k
5%
R13
20k
5%
R
V
CMPC
V
IN
CC
15
5
= 8V
0.1
+
V
V
IN
IN
SGND
= 16V
I
LOAD
C4
1µF
25V
Z5U
C1
150µF
20V
11
V
IN
I
COMMENTS
V
V
General Purpose with External Application Resistor
V
Suitable for Telecom or Offline Input Voltage
Reduced EMI and Switching Harmonics
(A)
SENSE
PGND
GATE
IN
IN
IN
= 12V
1
= 3V to 20V, I
= 3V to 20V, I
= 2.7V to 23V, Reduced EMI and Switching Harmonics
1
16
2
LOAD
2.7Ω
5%
R2
1737 F19
C10
470pF
50V
X7R
10
Q
Q
= 7mA
= 7mA
51Ω
R10
5%
15µH
L1
M1
IRLZ34S
R1
0.025Ω
22µF
22µF
C2A
25V
C2B
25V
© LINEAR TECHNOLOGY CORPORATION 2000
15µH
LT/LT 0605 REV A • PRINTED IN THE USA
L2
MBRD640CT
D1
33µF
16V
×4
C3
+
R14
750Ω
5%
1737 F18
V
OUT
1737fa
= 12V