LTC1872BES6 LINER [Linear Technology], LTC1872BES6 Datasheet - Page 10

• Manufacturer Part Number: LTC1872BES6
• Description: Constant Frequency Current Mode Step-Up DC/DC Controller in ThinSOT
• Manufacturer: LINER [Linear Technology]

APPLICATIONS
LTC1872B
10
TYPICAL APPLICATIO S
V
AA
AA
AA
IN
U
= 3 AA CELLS 2.7V TO 4.8V
C
ITH
R
ITH
INFORMATION
U
10k
BOLD LINES INDICATE HIGH CURRENT PATHS
220pF
Figure 6. LTC1872B Layout Diagram (See PC Board Layout Checklist)
U
C1: TAIYO YUDEN CERAMIC EMK325BJ106MNT
C2: AVX TPSD156M035R0300
D0: MOTOROLA MBR0540
D1-D7: CMD333UWC
W
R1
1
2
3
I
GND
V
TH
FB
1
2
3
/RUN
LTC1872B
I
GND
V
TH
FB
/RUN
LTC1872B
SENSE
NGATE
LTC1872B 3-Cell White LED Driver
R2
SENSE
V
NGATE
U
IN
–
V
5
4
6
IN
–
6
5
4
0.1 F
M1
R1
0.27
L1
150 H
+
D0
C
L1: COILCRAFT DO1608C-154
M1: Si9804
R1: DALE 0.25W
R
IN
S
+
C1
10 F
10V
C2
15 F
35V
L1
+
WHITE
1 TO 8
LEDs
C3
0.1 F
CERAMIC
D1
C
(WITH 8 LEDs)
OUT
V
OUT
M1
53.6
28.8V
15mA
V
V
1872B F06
IN
OUT
D1
D2
D8
1872B TA04
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