EVALUATION KIT AVAILABLE MAX8556/MAX8557 4A Ultra-Low-Input-Voltage LDO Regulators General Description Benefits and Features The MAX8556/MAX8557 low-dropout linear regulators 1.425V to 3.6V Input Voltage Range operate from input voltages as low as 1.425V and are Guaranteed 4A Output Current able to deliver up to 4A of continuous output current with a 1% Output Accuracy Over Load/Line/Temperature typical dropout voltage of only 100mV. The output voltage 100mV Dropout at 4A Load (typ) is adjustable from 0.5V to V - 0.2V. IN Built-In Soft-Start Designed with an internal p-channel MOSFET pass tran- 800A (typ) Operating Supply Current sistor, the MAX8556/MAX8557 maintain a low 800A typi- 150A (max) Shutdown Supply Current cal supply current, independent of the load current and Short-Circuit Current Foldback Protection dropout voltage. Using a p-channel MOSFET eliminates Thermal-Overload Protection the need for an additional external supply or a noisy inter- 10% Power-OK (MAX8556) nal charge pump. Other features include a logic-controlled shutdown mode, built-in soft-start, short-circuit protection 140ms Power-On Reset Output (MAX8557) with foldback current limit, and thermal-overload protec- Fast Transient Response tion. The MAX8556 features a POK output that transitions 16-Pin TQFN (5mm x 5mm) Package high when the regulator output is within 10% of its nomi- nal output voltage. The MAX8557 offers a power-on reset Typical Operating Circuit 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 TQFN V V IN OUT 1.425V TO 3.6V 0.5V TO V - 0.2V IN 5mm x 5mm package with exposed paddle. IN OUT Applications MAX8556 (MAX8557) Servers and Storage Optical Modules Devices Point-of-Load Supplies EN FB Networking ATE Base Stations POK GND (POR) N.C. Ordering Information appears at end of data sheet. 19-3257 Rev 3 4/17MAX8556/MAX8557 4A Ultra-Low-Input-Voltage LDO Regulators Absolute Maximum Ratings IN, EN, POK, POR to GND .....................................-0.3V to +4V Operating Temperature Range ........................... -40C to +85C FB, OUT to GND ........................................-0.3V to (V + 0.3V) Junction Temperature ......................................................+150C IN Output Short-Circuit Duration ....................................Continuous Storage Temperature Range ............................ -65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 16-Pin TQFN (derate 33.3mW/C above +70C) (Note 1) ...........................................2666.7mW Note 1: Maximum power dissipation is obtained using JEDEC JESD51-5 and JESD51-7 standards. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information PACKAGE TYPE: 16 TQFN Package Code T1655+3 Outline Number 21-0140 Land Pattern Number 90-0072 For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Electrical Characteristics (V = V = 1.8V, V = 1.5V, I = 2mA, T = -40C to +105C (MAX8556ETE+) and T = -40C to +85C (MAX8557ETE+), EN IN OUT OUT A A typical values are at T = +25C, unless otherwise noted.) (Note 2) A PARAMETER CONDITIONS MIN TYP MAX UNITS IN Input Voltage Range 1.425 3.600 V V rising, 70mV hysteresis 1.30 1.35 1.40 IN Input Undervoltage Lockout V V falling 1.23 1.28 1.33 IN OUT Output Voltage Range 0.5 3.4 V Load Regulation I = 2mA to 4A 0.1 %/A OUT Line Regulation V = 1.425V to 3.6V, V = 1.225V -0.15 0 +0.15 %/V IN OUT Dropout Voltage V = 1.425V, I = 4A, V = 480mV 100 200 mV IN OUT FB Regulated Output-Voltage Current V = 3.6V, V = 3V, V = 460mV 5 7 9 A IN OUT FB Limit Load Capacitance ESR < 50mA (Note 3) 16 120 F FB FB Threshold Accuracy V = 1.225V to 3V, V = V + 0.2V to 3.6V, OUT IN OUT 495 500 505 mV (Note 4) I = 2mA to 4A OUT FB Input Bias Current V = 0.5V, V = 3.6V 0.001 1 A FB IN Maxim Integrated 2 www.maximintegrated.com