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Technical Specifications
Parameters and characteristics for this part
| Specification | LM3444MAX/NOPB |
|---|---|
| Applications | Lighting |
| Dimming | Analog |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 8-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 8-SOIC |
| Topology | Step-Down (Buck) |
| Type | AC DC Offline Switcher |
| Voltage - Supply (Max) [Max] | 13 V |
| Voltage - Supply (Min) [Min] | 8 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2500 | $ 0.49 | |
| 5000 | $ 0.47 | |||
| 12500 | $ 0.45 | |||
| Texas Instruments | LARGE T&R | 1 | $ 0.78 | |
| 100 | $ 0.65 | |||
| 250 | $ 0.47 | |||
| 1000 | $ 0.35 | |||
Description
General part information
LM3444 Series
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCCundervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCCundervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.
Documents
Technical documentation and resources
