ALT80800 Description
The ALT80800 is a synchronous buck switching regulator that provides constant-current output to drive high-power LEDs. It integrates both high-side and low-side N-channel DMOS switches for DC-to-DC step-down conversion. A true average current output is achieved using a cycle-by-cycle, controlled on-time method.
ALT80800 Key Features
- AEC-Q100 qualified
- Supply voltage 4.5 to 55 V
- 2.0 A maximum output over operating temperature range
- Integrated high-side and low-side MOSFETs: 200 mΩ
- True average output current control
- Internal control loop pensation
- Integrated 5 V, 14 mA LDO regulator for peripheral circuits
- Dimming via PWM pin or EN pin down to 0.1% at 200 Hz
- Analog dimming (ADIM pin) for brightness calibration
- Low-power shutdown (1 µA typical)