MAX1577Y Overview
The MAX1577Y/MAX1577Z charge pumps drive white LEDs, including camera strobes, with regulated current up to 1.2A (guaranteed to 800mA). The very low openloop output resistance allows high flash brightness, even from a low battery input voltage. The adaptive 1x/2x regulating charge-pump operation provides high efficiency (up to 92%) while in movie mode or backlighting.
MAX1577Y Key Features
- Up to 1.2A Output Drive Capability (800mA Guaranteed)
- Up to 92% PLED / PBATT Efficiency for Movie Mode
- Flexible Brightness Control Two-Bit Logic for 100%, 33%, 20%, and Off PWM for 20% to 100%
- 3% Current Regulation Over Line and Temperature
- Current or Voltage Regulation for Flash and Backlighting (MAX1577Y)
- Current Regulation for Flash (MAX1577Z)
- Low Ripple and EMI
- 2.7V to 5.5V Supply Voltage Range
- Soft-Start Limits Inrush Current
- Output-Voltage Regulation Mode