LT3436 Datasheet, PDF (14/16 Pages) Linear Technology – 3A, 800kHz Step-Up Switching Regulator

LT3436
TYPICAL APPLICATIO S
Single Li-Ion Cell to 5V
L1
4.7µH
ON
OFF
+
SINGLE +
Li-Ion
CELL
C1
10µF
V_IN
SHDN
V_SW
LT3436
FB
GND
V_C
C2
3.3nF
R3
1.5k
D1
B220A
R1
31.6k
1%
V_OUT
5V
C3
470pF
+ C4
47µF
10V
R2
10k
1%
I_OUT V_IN
1.5A 2.7V
1.86A 3.3V
2.0A 3.6V
LT3436 • TA04
SEPIC Converter Drives 5W LumiLEDs Luxeon V White LEDs at 70% Efficiency
D1
B130A
VIN
3.6V TO 17V
GND
L1
LED ON
C1
4.7µF
X5R
25V
CERAMIC
8.2k
V_IN
SW
SHDN
FB
LT3436
SYNC
V_C
GND GND
C4
0.1µF
C_COUP
2.2µF, X5R, 25V
CERAMIC
L2
V_IN
+
R5
23.7k
LT1783
–
Q1
R7
124k
R6
4.99k
V_OUT
R4
1k
1%
Q1: DIODES, INC. MMBT2222A
L1: CDRH6D28 10µH 1.7A
L2: CDRH4D28 10µH 1A
D2: LUMILEDS LXHL-PW03 EMITTER OR LXHL-LW6C STAR
V_OUT
D2
700mA
R2
0.068Ω
1%
C2
22µF
X5R
16V
CERAMIC
3436 TA04b
3436fa
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