DC-DC LED Driver Development

I need a DC-DC LED driver designed specifically for low-power LEDs with dimming controlled by a microcontroller.

Requirements:
- Input voltage range: 5-57V
- PWM dimming frequency: Not Known
Ideal skills and experience:
- Experience in designing DC-DC converters
- Proficiency in PWM control
- Familiarity with microcontroller integration
- Background in LED driver development