LT3755/LT3755-1/LT3755-2
26
37551fd
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2008
LT 0310 REV D • PRINTED IN USA
relaTeD parTs
Typical applicaTion
Buck-Boost LED Driver for Automotive
PART NUMBER DESCRIPTION COMMENTS
LT3474 36V, 1A (I
LED
), 2MHz, Step-Down LED Driver V
IN
: 4V to 36V, V
OUT(MAX)
= 13.5V, True Color PWM Dimming = 400:1,
I
SD
< 1µA, TSSOP16E Package
LT3475 Dual 1.5A (I
LED
), 36V, 2MHz Step-Down LED Driver V
IN
: 4V to 36V, V
OUT(MAX)
= 13.5V, True Color PWM Dimming = 3000:1,
I
SD
< 1µA, TSSOP20E Package
LT3476 Quad Output 1.5A, 36V, 2MHz High Current
LED Driver with 1000:1 Dimming
V
IN
: 2.8V to 16V, V
OUT(MAX)
= 36V, True Color PWM Dimming = 1000:1,
I
SD
< 10µA, 5mm × 7mm QFN Package
LT3477 3A, 42V, 3MHz Boost, Buck-Boost, Buck LED Driver V
IN
: 2.5V to 25V, V
OUT(MAX)
= 40V, Dimming = Analog/PWM,
I
SD
< 1µA, QFN and TSSOP20E Packages
LT3478/LT3478-1 4.5A, 42V, 2.5MHz High Current LED Driver with
3000:1 Dimming
V
IN
: 2.8V to 36V, V
OUT(MAX)
= 42V, True Color PWM Dimming = 3000:1,
I
SD
< 3µA, TSSOP16E Package
LT3486 Dual 1.3A, 2MHz High Current LED Driver V
IN
: 2.5V to 24V, V
OUT(MAX)
= 36V, True Color PWM Dimming = 1000:1,
I
SD
< 1µA, 5mm × 3mm DFN and TSSOP16E Packages
LT3496 Triple 0.75A, 2.1MHz, 45V LED Driver V
IN
: 3V to 30V, V
OUT(MAX)
= 45V, Dimming = 3000:1,
I
SD
< 1µA, 4mm × 5mm QFN and TSSOP16E Packages
LT3517 1.3A, 2.5MHz, 45V LED Driver V
IN
: 3V to 30V, V
OUT(MAX)
= 45V, Dimming = 3000:1,
I
SD
< 1µA, 4mm × 4mm QFN and TSSOP16E Packages
LT3518 2.3A, 2.5MHz, 45V LED Driver V
IN
: 3V to 30V, V
OUT(MAX)
= 45V, Dimming = 3000:1,
I
SD
< 1µA, 4mm × 4mm QFN and TSSOP16E Packages
LT3756/LT3756-1/
LT3756-2
100V
IN
, 100V
OUT
LED Controller V
IN
: 6V to 100V, V
OUT(MAX)
= 100V, True Color PWM Dimming = 3000:1,
I
SD
< 1µA, 3mm × 3mm QFN-16 and MS16E Packages
LTC
®
3783 High Current LED Controller V
IN
: 3V to 36V, V
OUT(MAX)
= Ext FET, True Color PWM Dimming = 3000:1,
I
SD
< 20µA, 5mm × 4mm QFN10 and TSSOP16E Packages
Efficiency vs V
IN
V
IN
LT3755-2
LTC4440-5
D1
GNDV
C
INTV
CC
SHDN/UVLO
FB
V
REF
ISP
383k
100k
INTV
CC
INTV
CC
INTV
CC
1M
4.7µF
s2
0.01µF
0.01µF
V
IN
6V TO
36V
330k
10k
28.7k
375kHz
1%
4.7µF
47k
CTRL
0.025Ω
0.1Ω
1M
40k
M2
M1
1A
4.7µF
37551 TA05a
OPENLED
PWM
SS
RT
ISN
GATE
SENSE
PWMOUT
INP
V
CC
GND
TG
TS
BOOST
M1, M2: VISHAY SILICONIX SI7850DP
D1, D2: DIODES, INC SBM540
D2
0.22µF
22µF
V
IN
(V)
0
EFFICIENCY (%)
10
20 30
37551 TA05b
40
80
84
88
92
100
96
