The IS31LT3954/A is a DC-to-DC switching converter that integrates an N-channel MOSFET as a high-side switch to operate in a buck configuration. It delivers a wide input voltage range from 4.5V to 38V and provides a constant output current of up to 3A for driving high power LEDs. The device features cycle-by-cycle controlled on-time method for true average output current operation and fast transient response. It includes spread spectrum frequency dithering to optimize EMI performance and supports PWM dimming via a dedicated logic input.
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| Input Voltage Range | 4.5 to 38V |
| Maximum Output Current | 3A |
| Switching Frequency | Up to 1000kHz |
| Output Current Accuracy | ±5% |
| Shutdown Current | 2µA |
| Operating Temperature Range | -40 to +125°C |
| RoHS | Compliant |
| Automotive | AEC-Q100 (IS32LT versions) |
