Datasheet

LT3477
20
3477fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2005
LT 0309 REV C • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION COMMENTS
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High Effi ciency Boost Regulator
V
IN
: 1.6V to 18V, V
OUT(MAX)
= 5.5V, I
Q
= 2.5mA, I
SD
< 1μA, QFN16 Package
LT3436 3A (I
SW
), 800kHz, 34V Step-Up DC/DC Converter V
IN
: 3V to 25V, V
OUT(MAX)
= 34V, I
Q
= 0.9mA, I
SD
< 6μA, TSSOP16E Package
LTC
®
3453 Synchronous Buck-Boost High Power White
LED Driver
V
IN
: 2.7V to 5.5V, V
OUT(MAX)
= 5.5V, I
Q
= 2.5mA, I
SD
< 1μA, QFN16 Package
LT3466 Dual Constant Current, 2MHz, High Effi ciency
White LED Boost Regulator With Integrated
Schottky Diode
V
IN
: 2.7V to 24V, V
OUT(MAX)
= 40V, I
Q
= 5mA, I
SD
< 16μA, DFN Package
LT3479 3A, 42V Full Featured Boost/Inverter Converter
With Soft-Start
V
IN
: 2.5V to 24V, V
OUT(MAX)
= 40V, I
Q
= 5mA, I
SD
< 1μA, DFN/TSSOP Packages
LTC3490 Single Cell 350mA, 1.3MHz LED Driver V
IN
: 1V to 3.2V, V
OUT(MAX)
= 4.7V, I
SD
< 1μA, DFN/SO8 Packages
Buck Mode High Current LED Driver
Effi ciency
LED CURRENT (A)
0
EFFICIENCY (%)
50
60
70
0.6
1
3477 TA05b
40
30
20
0.2 0.4 0.8
80
90
100
I
SN1
I
SP1
V
IN
I
ADJ1
I
ADJ2
FBN
I
SP2
R3
280k
R4
10k
C1
2.2μF
R1
0.1Ω
C3
3.3μF
PV
IN
32V
V
IN
3.3V
C4
33nF
C1: NIPPON UNITED CHEMICON NTS40X5R1H225M
C2: TAIYO YUDEN GMK316BJ105ML
C3: TAIYO YUDEN LMK316BJ475
L1: TOKO A814AY-330M
D1: DIODES INC DFLS140
C
C
4.7nF
3477 TA07
R2
22k
R
C
1k
SW
L1
33μH
1A
LED
STRING
C2
1μF
D1
LED4
LED1
•
•
•
FBP SSGND
LT3477
I
SN2
R
T
SHDN
V
C
V
REF
SHDN