参数资料
型号: LT3579EFE-1#PBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: SWITCHING REGULATOR, PDSO20
封装: 4.40 MM, LEAD FREE, PLASTIC, TSSOP-20
文件页数: 35/40页
文件大小: 503K
代理商: LT3579EFE-1#PBF
LT3579/LT3579-1
40
35791f
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 2010
LT 0410 PRINTED IN USA
relaTeD parTs
PART NUMBER
DESCRIPTION
COMMENTS
LT3581
3.3A (ISW), 42V, 2.5MHz, High Efficiency
Step-Up DC/DC Converter
VIN: 2.5V to 22V, VOUT(MAX) = 42V, IQ = 1.9mA, ISD = < 1A, 4mm × 3mm DFN-14,
MSOP-16E
LT3580
2A (ISW), 42V, 2.5MHz, High Efficiency Step-Up
DC/DC Converter
VIN: 2.5V to 32V, VOUT(MAX) = 42V, IQ = 1mA, ISD = < 1A, 3mm × 3mm DFN-8,
MSOP-8E
LT3479
3A (ISW), 40V, 3.5MHz, High Efficiency Step-Up
DC/DC Converter
VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 5mA, ISD = < 1A, 4mm × 3mm DFN-14,
TSSOP-16E
Typical applicaTion
1MHz SEPIC Converter Generates a 12V Output from
a 9V to 16V Input
D1
L2
6.8H
0.22F
47pF
L1
6.8H
VOUT
12V
1.9A*
CVIN
4.7F
VIN
3.3V TO VPWR
VPWR
9V TO 16V
VIN
SW1 SW2
35791 TA29
LT3579
86.6k
9.53k
130k
C1
4.7F
SHDN
FAULT
CLKOUT
GATE
FB
VC
SYNC GND
SS
RT
2.2nF
COUT
10F
×3
100k
CPWR
4.7F
CPWR: 4.7F, 25V, X7R, 1206
CVIN: 4.7F, 25V, X7R, 1206
C1: 4.7F, 25V, X7R, 1206
COUT: 10F, 25V, X7R, 1210
D1: DIODES INC MBRM360
L1, L2: COOPER BUSSMANN DRQ125-6R8-R
LINE REGULATION (VIN = 5V, IOUT = 1A) = 0.017%/V
LOAD REGULATION (VPWR = 12V, VIN = 5V) = –0.23%/A
*MAX OUTPUT CURRENT
VPWR = 9V VPWR = 12V
VIN = 3.3V TO 5V
1.6A
1.9A
VIN = VPWR
1.4A
LOAD CURRENT (A)
0
20
EFFICIENCY
(%)
POWER
LOSS
(W)
60
70
80
90
50
40
30
100
0
1.6
2
2.4
2.8
1.2
0.8
0.4
3.2
0.75 1 1.25 1.5 1.75 2
0.25 0.5
35791 TA30
VPWR = 12V
VIN = 5V
Efficiency and Power Loss
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