The LM3409-Q1 is an automotive-grade P-channel MOSFET (PFET) controller for step-down (buck) current regulators. It uses constant off-time (COFT) control to regulate an accurate constant current without the need for external control loop compensation. The device features a wide input voltage range from 6V to 42V, high-side differential current sensing, and support for up to 5A forward current. It includes a 10,000:1 PWM dimming range and a 250:1 analog dimming range, making it suitable for automotive lighting and general illumination applications.
Temp Range-40 to 125°C
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Technical Specifications
Texas Instruments LM3409-Q1 technical specifications.
General
| Input Voltage (Min) | 6V |
| Input Voltage (Max) | 42V |
| Output Current (Max) | 5A |
| Switching Frequency (Max) | 2000kHz |
| Output Voltage (Min) | 1.24V |
| Gate Drive Peak Current | 1A |
| Operating Temperature Range | -40 to 125°C |
| Quiescent Current (Typ) | 2mA |
Compliance
| Automotive Qualification | AEC-Q100 Grade 1 |
| RoHS | Compliant |
Datasheet
Texas Instruments LM3409-Q1 Datasheet
Download the complete datasheet for Texas Instruments LM3409-Q1 to view detailed technical specifications.
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