LT1937ES5#TR Linear Technology, LT1937ES5#TR Datasheet - Page 9

• Manufacturer Part Number: LT1937ES5#TR
• Description: IC LED DRIVR WHITE BCKLGT TSOT-5
• Manufacturer: Linear Technology
• Type: Backlight, White LEDr

Specifications of LT1937ES5#TR

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.6MHz
• Voltage - Supply: 2.5 V ~ 10 V
• Voltage - Output: 36V
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Operating Temperature: -40°C ~ 85°C
• Internal Switch(s): Yes
• Efficiency: 84%
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output / Channel: -
• Other names: LT1937ES5TR

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