<strong>MAX8556ETE General Description
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 out-put voltage is adjustable from 0.5V to VIN - 0.2V.Designed with an internal p-channel MOSFET pass tran-sistor, the MAX8556/MAX8557 maintain a low 800µA typi-cal 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 inter-nal charge pump. Other features include a logic-con-trolled shutdown mode, built-in soft-start, short-circuit protection with foldback current limit, and thermal-over-load 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.
MAX8556ETE Features
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
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