LT1737IGN(RevA) View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT1737IGN Datasheet PDF : 28 Pages
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LT1737
TYPICAL APPLICATIO S
VIN
R3
26.1k
1%
C7
R4
47pF 3.01k
50V 1%
NPO
8
7
R11
C9
22k
47pF
5%
50V
C5
NPO
4.7nF
50V
X7R
C8
+ C1
R8
160k
5%
0.1µF
25V
Z5U
8 INP OUT 1
U2
R12
3
LT1121
GND ADJ
2
24k
5%
R9
R13
33k
20k
5%
5%
150µF
20V
C4
1µF
25V
Z5U
9
10
15
3VOUT UVLO
FB
LT1737
VC
OSCAP SFST tON ENDLY MINENAB ROCMP
6
3
C6
47pF
50V
NPO
14 13
R5 R6
33k 24k
5% 5%
12
4
R7
100k
5%
VCC
RCMPC
5
16
GATE
ISENSE 2
SGND PGND
11 1
L1
15µH
R2
2.7Ω
5%
C10 R10
470pF 51Ω
50V 5%
X7R
C2A
22µF
25V
D1
MBRD640CT
M1
IRLZ34S C2B L2
22µF 15µH
R1
25V
0.025Ω
C3 +
33µF
16V
×4
C1: SANYO OS-CON (20SV150M)
C2A-B: TOKIN Y5V (IE226ZY5U-C505)
C3: SANYO POSCAP (16TPC33M)
D1: MOTOROLA 40V, 6A SCHOTTKY DIODE
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)
Figure 18. 8V-16V to 12V Nonisolated Converter
90
80
VIN = 8V
70
VIN = 12V
60
VIN = 16V
50
40
30
20
0.01
0.1
1
ILOAD (A)
10
1737 F19
Figure 19. Efficiency vs ILOAD
VOUT = 12V
R14
750Ω
5%
1737 F18
RELATED PARTS
PART NUMBER
LT1424-5
LT1424-9
LT1425
LT1533
LT1725
LT1738
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
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
COMMENTS
VIN = 3V to 20V, IQ = 7mA
VIN = 3V to 20V, IQ = 7mA
General Purpose with External Application Resistor
VIN = 2.7V to 23V, Reduced EMI and Switching Harmonics
Suitable for Telecom or Offline Input Voltage
Reduced EMI and Switching Harmonics
1737fa
LT/LT 0605 REV A • PRINTED IN THE USA
© LINEAR TECHNOLOGY CORPORATION 2000
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