LT1937ES5#TRMPBF
ActiveWHITE LED STEP-UP CONVERTER IN SC70 AND THINSOT
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LT1937ES5#TRMPBF
ActiveWHITE LED STEP-UP CONVERTER IN SC70 AND THINSOT
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Technical Specifications
Parameters and characteristics for this part
| Specification | LT1937ES5#TRMPBF |
|---|---|
| Applications | Backlight |
| Current - Output / Channel | 320 mA |
| Dimming | Analog, PWM |
| Frequency | 1.2 MHz |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | SOT-23-5 Thin, TSOT-23-5 |
| Topology | Step-Up (Boost) |
| Type | DC DC Regulator |
| Voltage - Output | 36 V |
| Voltage - Supply (Max) [Max] | 10 V |
| Voltage - Supply (Min) [Min] | 2.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 6.08 | |
| 10 | $ 4.10 | |||
| 25 | $ 3.59 | |||
| 100 | $ 3.01 | |||
| 250 | $ 2.73 | |||
| Digi-Reel® | 1 | $ 6.08 | ||
| 10 | $ 4.10 | |||
| 25 | $ 3.59 | |||
| 100 | $ 3.01 | |||
| 250 | $ 2.73 | |||
| Tape & Reel (TR) | 500 | $ 2.56 | ||
| 1000 | $ 2.42 | |||
| 1500 | $ 2.35 | |||
| 2500 | $ 2.27 | |||
| 3500 | $ 2.24 | |||
Description
General part information
LT1937 Series
The LT1937 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The LT1937 switches at 1.2MHz, allowing the use of tiny external components. The output capacitor can be as small as 0.22µF, saving space and cost versus alternative solutions. A low 95mV feedback voltage minimizes power loss in the current setting resistor for better efficiency.The LT1937 is available in low profile SC70 and ThinSOT packages.ApplicationsCellular PhonesPDAs, Handheld ComputersDigital CamerasMP3 PlayersGPS Receivers
Documents
Technical documentation and resources