LT1937ESC6 Linear Technology, LT1937ESC6 Datasheet - Page 9

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LT1937ESC6

Manufacturer Part Number
LT1937ESC6
Description
White LED Step-Up Converter in SC70 and ThinSOT
Manufacturer
Linear Technology
Datasheet

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TYPICAL APPLICATIO S
3V TO 5V
3V TO 5V
V
V
IN
IN
C
C
D: CENTRAL CMDSH-3
L: MURATA LQH3C220
C
C
D: CENTRAL CMDSH2-3
L: MURATA LQH3C220
IN
OUT
IN
OUT
: TAIYO YUDEN JMK107BJ105
C
1 F
: TAIYO YUDEN JMK107BJ105
: AVX 0603YD224
C
1 F
IN
: AVX 0603ZD105
IN
Li-Ion to Three White LEDs
Li-Ion to Two White LEDs
V
SHDN
V
SHDN
IN
IN
LT1937
22 H
LT1937
GND
22 H
GND
L
L
SW
SW
FB
FB
DIMMING
DIMMING
V
V
DC
U
DC
D
90k
D
90k
5k
5k
R1
4
R1
2
1937 TA01a
1937 TA05a
C
0.22 F
C
1 F
OUT
OUT
90
85
80
75
70
65
60
86
84
82
80
78
76
74
72
70
0
0
V
IN
= 3V
Three LED Efficiency
10
5
Two LED Efficiency
LED CURRENT (mA)
LED CURRENT (mA)
V
IN
= 3.6V
10
20
V
IN
V
= 3V
IN
= 3.6V
15
30
1937 TA01b
1937 TA05a
20
40
LT1937
9
1937f

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