LTC3530 LINER [Linear Technology], LTC3530 Datasheet - Page 14

• Manufacturer Part Number: LTC3530
• Description: Wide Input Voltage Synchronous Buck-Boost DC/DC Converter
• Manufacturer: LINER [Linear Technology]

LTC3530
TYPICAL APPLICATIONS
14
2.2V TO
4.2V
10μF
V
C
IN
IN
R2 = R1/1.5
I
D1 = BAT54
LED
High Effi ciency Li-Ion Powered Constant Current Lumiled Driver
=
12,810 (R1+R2+R3+R4)
OFF ON
R1 • R3
R
44.2k
T
Lumiled Driver Effi ciency vs LED Current
100
98
96
94
92
90
88
86
84
82
80
0.1
SW1
V
SD/SS
R
IN
T
V
1MHz
IN
LTC3530
= 3.6V
3.3μH
GND
L1
C
C
BURST
IN
OUT
V
SW2
= TAIYO YUDEN JMK212BJ106MG
LED CURRENT (A)
OUT
FB
V
= TAIYO YUDEN JMK325BJ475MM
C
C
1nF
P1
R3
95.3k
100k
R2
C
470pF
100k
D1
BURST
R4
3530 TA04b
0.5
4.7μF
R1
301k
C
OUT
I
LED
LHXL-PW01
= 500mA
3530fb