MAX8645Y
Description
The MAX8645X/MAX8645Y charge pumps drive up to eight white LEDs with regulated constant current for uniform intensity. The main group of LEDs (M1- M6) can be driven up to 30m A per LED for backlighting. The flash group of LEDs (F1 and F2) is independently controlled and can be driven up to 200m A per LED (or 400m A total). Two 200m A LDOs are on-board to provide power for camera functions. The LDOs’ output voltages are pin programmable to meet different camera-module requirements. The MAX8645X and MAX8645Y differ only in LDO output voltages. By utilizing adaptive 1x/1.5x/2x chargepump modes and very-low-dropout current regulators, the MAX8645X/MAX8645Y achieve high efficiency over the full 1-cell lithium-battery voltage range. The 1MHz fixed-frequency switching allows for tiny external ponents, and the regulation scheme is optimized to ensure low EMI and low input ripple. The MAX8645X/MAX8645Y are available in a 28-pin TQFN, 4mm x 4mm (0.8mm max height) lead-free...
