Datasheet

13
LT3436
3436fa
LT3436
V
IN
GND
V
IN
**
4V TO 9V
V
C
FB
LT3436 • TA03
V
SW
SHDN
C1
4.7µF
20V
C4
15nF
C5
470pF
R1
2.2k
R3
10k
1%
R2
31.6k
1%
V
OUT
†
5V
C3
47µF
10V
ON
OFF
L1A*
15µH
•
•
L1B*
15µH
C2
4.7µF
COILTRONICS CTX15-4
INPUT VOLTAGE MAY BE GREATER OR
LESS THAN OUTPUT VOLTAGE
D1
B220A
V
IN
4V
5V
6V
7V
9V
I
OUT
0.84A
1.03A
1.18A
1.29A
1.50A
†
MAX I
OUT
*
**
+
+
4V-9V
IN
to 5V
OUT
SEPIC Converter**
TYPICAL APPLICATIO S
U
Boost Converter Drives Luxeon III 1A 3.6V White LED with 70% Efficiency
V
IN
FB
V
C
SYNC
GNDGND
3436 TA03b
SW
SHDN
0.1µF
Q1
Q2
V
OUT
= V
IN
+ V
LED
V
OUT
V
IN
GND
V
IN
3.3V TO 4.2V
LT3436
UPS120
L1
0.05Ω
1%
1A CONSTANT CURRENT
Q1: MMBT2222A
Q2: FMMT3906
L1: CDRH6D28-3R0
LXHL-PW09 EMITTER
4.7µF
X5R
6.3V
CERAMIC
22µF
X5R
10V
CERAMIC
1.21k
1%
4.99k
78.7k
49.9Ω
1%
8.2k
–
+
LED ON
LT1783