LT1937ES5#TRMPBF Linear Technology, LT1937ES5#TRMPBF Datasheet - Page 12

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

Specifications of LT1937ES5#TRMPBF

• 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
• Current - Output / Channel: 15mA
• Internal Switch(s): Yes
• Efficiency: 84%
• No. Of Outputs: 1
• Output Current: 320mA
• Output Voltage: 36V
• Dimming Control Type: PWM
• Operating Temperature Range: -40°C To +85°C
• Driver Case Style: TSOT-23
• Switching Frequency: 1.2MHz
• Rohs Compliant: Yes
• Operating Supply Voltage (typ): 3.3/5/9V
• Number Of Segments: 6
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: TSOT-23
• Pin Count: 5
• Mounting: Surface Mount
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 10V
• Led Driver Application: Cell Phones, PDA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LT1937ES5#TRMPBFTR

RELATED PARTS
PART NUMBER
LT1615
LT1618
LT1932
LT1944/LT1944-1
LTC
LTC3201
LTC3202
LT1937
12
TYPICAL APPLICATIO
®
3200/LTC3200-5 Low Noise White LED Charge Pump Converter
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
80
70
60
85
75
0
V
IN
= 3V
DESCRIPTION
Micropower Step-Up Converter in ThinSOT
Constant Current/Voltage Step-Up DC/DC
White LED Step-Up Converter in ThinSOT
Dual Micropower Step-Up Converter
For up to 6 LEDs
Ultralow Noise White LED Charge Pump Converter
For up to 6 LEDs
Low Noise White LED Fractional Charge Pump Converter
For up to 6 LEDs
Four LED Efficiency
5
V
LOAD CURRENT (mA)
IN
= 3.6V
10
3V TO 5V
U
15
V
IN
1937 TA02b
www.linear.com
C
C
D: CENTRAL CMDSH-3
L: MURATA LQH3C220
IN
OUT
20
: TAIYO YUDEN JMK107BJ105
C
1 F
: AVX 0603YD224
IN
Li-Ion to Four White LEDs
V
SHDN
IN
LT1937
22 H
GND
L
SW
FB
DIMMING
V
DC
100mA/DIV
100mV/DIV
D
COMMENTS
Up to 36V Output; 20 A I
Can Drive Up to Six LEDs, ThinSOT Package
1.4MHz, Drives Up to 20 LEDs, MS10 Package
1.2MHz, V
ThinSOT Package
V
MS10 Package
2MHz, 100mA, No Inductor Required, MS8/ThinSOT Packages
1.8MHz, 100mA, No Inductor Required, DAC Brightness Adj,
MS8 Package
1.5MHz, 125mA, No Inductor Required, Digital Brightness Adjust,
MS8 Package
90k
10V/DIV
IN
V
= 1.2V to 15V, Two Independent DC/DCs, Up to 36V
5k
V
I
OUT
SW
SW
V
FOUR LEDs
15mA
IN
R1
4
IN
= 3.6V
= 1V to 10V, Drives Up to Eight LEDs from 3V Input,
Switching Waveforms
1937 TA02a
C
0.22 F
OUT
Q
, V
0.2 s/DIV
IN
: 1V to 15V,
LINEAR TECHNOLOGY CORPORATION 2002
LT/TP 0702 2K • PRINTED IN USA
1937 TA02c
OUT
, 20 A I
1937f
Q
,