LTC3442 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3442
Linear Technology
'LTC3442' PDF : 20 Pages View PDF
TYPICAL APPLICATIONS
High Current LED Driver with Low/High Current Range for Pulsed
Applications; LED Current Is 0.5A with 1.5A Pulse
LTC3442
VIN
2.7V TO
4.2V
10µF
6.3V
R5
7.87k
*OFF ON
3.3µH
SW1
SW2
VIN
VOUT
LTC3442
SHDN/SS
FB
RLIM
VC
RT
BURST
R4
2k
57.6k SGND
PGND
VOUT
ILED = 500mA/1.5A
1nF
R2
20k
R2
200k
LHXL-PW03
10µF
6.3V
95.3k
1nF
R1
301k
OPEN LED VOLTAGE LIMIT = (R4 + R5) • 0.95/R4
LOW HI
40.2k
2N7002
R2 = R1/1.5
ILED = 24 • (R1 + R2 + R3)/(R1 • R3) AMPS
(OR: ILED = 40/R3 + .08)
3442 TA05
* NOTE: THE SHDN/SS VOLTAGE MUST BE NO MORE THAN 0.5V BELOW VIN WHEN ENABLED.
For more information www.linear.com/LTC3442
3442fb
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