B0530W 查看數據表（PDF） - Linear Technology
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B0530W Datasheet PDF : 20 Pages
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LT3474/LT3474-1
TYPICAL APPLICATION
Step-Down 1A LED Driver with Four Series Connected LED Output
VIN
21V TO
36V
C1
2.2μF
50V
VIN
BOOST
SHDN
SW
LT3474-1
D2
RT
BIAS
C3
0.22μF L1
16V 47μH
D1
R1
80.6k
C4
0.1μF
REF
VADJ
VC
OUT
PWM
LED
GND
C2
2.2μF
R2
25V
10k
D3
12V TO 18V
LED VOLTAGE
1A LED
CURRENT
Q1
R3
100k
fSW = 500kHz
D1: MBRM 140
D2: 7.5V Zener Diode
D3: 22V Zener Diode
Q1: MMBT3904
C1 TO C3: X5R OR X7R
3474 TA02a
RELATED PARTS
PART NUMBER DESCRIPTION
COMMENTS
LT1618
Constant Current, 1.4MHz, 1.5A Boost Converter
VIN: 1.6V to 18V, VOUT(MAX) = 36V, IQ = 1.8mA, ISD = <1μA,
MS10 Package
LT1766
60V, 1.2A (IOUT), 200kHz, High Efficiency Step-Down DC/DC Converter VIN: 5.5V to 60V, VOUT(MAX) = 1.20V, IQ = 2.5mA, ISD = 25μA,
TSSOP16/E Packages
LT1956
60V, 1.2A (IOUT), 500kHz, High Efficiency Step-Down DC/DC Converter VIN: 5.5V to 60V, VOUT(MAX) = 1.20V, IQ = 2.5mA, ISD = 25μA,
TSSOP16/E Packages
LT1961
1.5A (ISW), 1.25MHz, High Efficiency Step-Up DC/DC Converter
VIN: 3V to 25V, VOUT(MAX) = 35V, IQ = 0.9mA, ISD = 6μA,
MS8E Package
LT1976/LT1977 60V, 1.2A (IOUT), 200kHz/500kHz, High Efficiency Step-Down
DC/DC Converters with BurstMode® Operation
VIN: 3.3V to 60V, VOUT(MAX) = 1.20V, IQ = 100μA, ISD = <1μA,
TSSOP16E Package
LT3430/LT3431
LT3433
LT3434/LT3435
60V, 2.5A (IOUT), 200kHz, High Efficiency Step-Down DC/DC Converters
60V, 400mA (IOUT), 200kHz, High Efficiency Step-Up/Step-Down
DC/DC Converters with Burst Mode Operation
60V, 2.5A (IOUT), 200kHz/500kHz, High Efficiency Step-Down
DC/DC Converters with Burst Mode Operation
VIN: 5.5V to 60V, VOUT(MAX) = 1.20V, IQ = 2.5μA,
ISD = <25μA, TSSOP16/E Packages
VIN: 4V to 60V, VOUT: 3.3V to 20V, IQ = 100μA,
ISD = <1μA, TSSOP16E Package
VIN: 3.3V to 60V, VOUT(MAX) = 1.20V, IQ = 100μA, ISD = <1μA,
TSSOP16E Package
LTC3453
1MHz, 800mA Synchronous Buck-Boost High Power LED Driver
VIN: 2.7V to 5.5V, VOUT(MAX) = 5.5V, IQ = 2.5mA, ISD = <6μA,
QFN Package
LT3467/LT3467A 1.1A (ISW), 1.3MHz/2.1MHz, High Efficiency Step-Up DC/DC Converters VIN: 2.4V to 16V, VOUT(MAX) = 40V, IQ = 1.2mA, ISD = <1μA,
with Integrated Soft-Start
ThinSOT™ Package
LT3477
3A, 42V, 3MHz Step-Up Regulator with Dual Rail to Rail Current Sense VIN: 2.5V to 2.5V, VOUT(MAX) = 40V, IQ = 5mA, ISD = <1μA,
QFN, TSSOP16E Packages
LT3479
3A, Full Featured DC/DC Converter with Soft-Start and Inrush
Current Protection
VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 6.5mA, ISD = <1μA,
DFN and TSSOP Packages
Burst Mode is a registered trademark of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
3474fd
LT 1008 REV D • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005
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