LTC1872ES6 LINER [Linear Technology], LTC1872ES6 Datasheet - Page 11

• Manufacturer Part Number: LTC1872ES6
• Description: Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIO
V
AA
AA
AA
IN
= 3 AA CELLS 2.7V TO 4.8V
10k
220pF
C1: TAIYO YUDEN CERAMIC EMK325BJ106MNT
C2: AVX TPSE476M016R0150
D1: IR10BQ015
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
10k
220pF
U
C1: TAIYO YUDEN CERAMIC EMK325BJ106MNT
C2: AVX TPSD156M035R0300
D0: MOTOROLA MBR0540
D1-D7: CMD333UWC
1
2
3
I
GND
V
TH
FB
78.7k
1
2
3
/RUN
LTC1872
I
GND
V
LTC1872 12V/500mA Boost Converter
TH
FB
LTC1872 Three-Cell White LED Driver
SENSE
/RUN
NGATE
LTC1872
1.1M
V
SENSE
IN
–
NGATE
5
4
6
V
IN
–
5
4
6
L1: COILTRONICS UP2B-100
M1: Si9804DV
R1: DALE 0.25W
M1
M1
R1
0.27
R1
0.033
L1
10 H
L1
150 H
D0
D1
L1: COILCRAFT DO1608C-154
M1: Si9804
R1: DALE 0.25W
+
+
C1
10 F
10V
C2
15 F
35V
C1
10 F
10V
C2
47 F
16V
1872 TA02
WHITE
1 TO 8
LEDs
C3
0.1 F
CERAMIC
V
3V TO 9.8V
V
12V
IN
OUT
(WITH 8 LEDs)
V
OUT
53.6
28.8V
15mA
D1
D2
D8
1872 TA04
•
•
•
LTC1872
11