The MAX8556/MAX8557 low-dropout linear regulators operate from input voltages as low as 1.425V and are able to deliver up to 4A of continuous output current with a typical dropout voltage of only 100mV. The output voltage is adjustable from 0.5V to VIN - 0.2V. Designed with an internal p-channel MOSFET pass transistor, the MAX8556/MAX8557 maintain a low 800µA typical supply current, independent of the load current and dropout voltage. Using a p-channel MOSFET eliminates the need for an additional external supply or a noisy internal charge pump. Other features include a logic-controlled shutdown mode, built-in soft-start, short-circuit protection with foldback current limit, and thermal-overload protection. The MAX8556 features a POK output that transitions high when the regulator output is within ±10% of its nominal output voltage. The MAX8557 offers a power-on reset output that transitions high 140ms after the output has achieved 90% of its nominal output voltage. The MAX8556/MAX8557 are available in a 16-pin thin QFN 5mm x 5mm package with exposed paddle. Applications * Automated Test Equipment (ATE) * Base Stations * Networking * Optical Modules * Point-of-Load Supplies * Servers and Storage Devices * 1.425V to 3.6V Input Voltage Range * Guaranteed 4A Output Current * ±1% Output Accuracy Over Load/Line/Temperature * 100mV Dropout at 4A Load (typ) * Built-In Soft-Start * 800µA (typ) Operating Supply Current * 150µA (max) Shutdown Supply Current * Short-Circuit Current Foldback Protection * Thermal-Overload Protection * ±10% Power-OK (MAX8556) * 140ms Power-On Reset Output (MAX8557) * Fast Transient Response * 16-Pin Thin QFN (5mm x 5mm) Package https://elecena.pl/product/22337097/4a-ultra-low-input-voltage-ldo-regulators 2022-12-29 https://elecena.pl/product/22337097/4a-ultra-low-input-voltage-ldo-regulators 2025-01-20