MAX8526/MAX8527/MAX8528 19-3190 Rev 2 8/09 1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators General Description Features The MAX8526/MAX8527/MAX8528 low-dropout linear 1.425V to 3.6V Input Voltage Range regulators operate from input voltages as low as 1.425V Guaranteed 200mV Dropout at 2A Output Current and are able to deliver up to 2A of continuous output current with a maximum dropout voltage of only 200mV. 0.6% Initial Accuracy The output voltage can be set from 0.5V to (V - 0.2V) IN 1.4% Output Accuracy over and is 1.4% accurate over load and line variations, from Load/Line/Temperature (0C to +85C) 0C to +85C. Compatible with Ceramic Capacitors These regulators use small, 2.2F ceramic input capaci- tors and 10F ceramic output capacitors to deliver 2A Fast Transient Response output current. High bandwidth provides excellent tran- 440A Operating Supply Current sient response and limits the output voltage deviation to 45mV for a 20mA to 2A load step, with only a 10F <50A Shutdown Supply Current ceramic output capacitor, and the voltage deviations can Short-Circuit Protection be reduced further by increasing the output capacitor. Designed with an internal p-channel MOSFET pass Thermal-Overload Protection transistor, the MAX8526/MAX8527/MAX8528 feature Soft-Start Limits Inrush Current low 500A typical supply current during dropout condi- 5mm x 6.4mm Footprint, 1.1mm Profile tions. Soft-start reduces inrush current. Other features include a logic-controlled shutdown mode, short-circuit Ordering Information protection, and thermal-overload protection. The MAX8527 features a power-OK (POK) output that PART TEMP RANGE PIN-PACKAGE transitions high when the regulator output is within MAX8526EUD -40C to +85C 14 TSSOP 10% of its nominal output voltage. The MAX8528 fea- MAX8526EUD+ -40C to +85C 14 TSSOP tures a 150ms power-on reset (POR) output. MAX8527EUD -40C to +85C 14 TSSOP The parts are packaged in a 14-pin TSSOP package, which includes an exposed pad for optimal power MAX8527EUD+ -40C to +85C 14 TSSOP dissipation. MAX8527EUD/V+ -40C to +85C 14 TSSOP MAX8528EUD -40C to +85C 14 TSSOP Applications MAX8528EUD+ -40C to +85C 14 TSSOP Servers +Denotes a lead(Pb)-free RoHS-compliant package. Networking /V Denotes an automotive qualified part. Storage Typical Operating Circuit Base Stations Optical Modules INPUT OUTPUT Post Regulators 1.425V TO 3.6V 0.5V TO (V - 0.2V), 2A IN IN OUT Notebooks 2.2F MAX8526 PDAs 10F MAX8527 ATE MAX8528 POWER-ON RESET POR (MAX8528) FB POWER-OK POK (MAX8527) ON EN GND Pin Configurations appear at end of data sheet. OFF Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators ABSOLUTE MAXIMUM RATINGS IN, EN, POK (MAX8527), POR (MAX8528), Operating Temperature Range ...........................-40C to +85C FB to GND ........................................................-0.3V to +4.0V Junction Temperature......................................................+150C OUT to GND ..................................................-0.3V to (IN + 0.3V) Storage Temperature Range .............................-65C to +150C Output Short-Circuit Duration.....................................Continuous Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C, A EP soldered to PC board ground) 14-Pin TSSOP (derate 20.8mW/C above +70C)..............1.7W 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. ELECTRICAL CHARACTERISTICS (Circuit of Figure 1: V = +1.8V, V = +1.5V, EN = IN, I = 2mA, T = -40C to +85C, unless otherwise noted.) (Note 1) IN OUT OUT A PARAMETER CONDITIONS MIN TYP MAX UNITS IN Input Voltage Range 1.425 3.600 V Input Undervoltage Lockout V rising, 70mV hysteresis 1.32 1.35 1.38 V IN OUT Output Voltage Range 0.5 3.4 V Load Regulation I = 2mA to 2A 0.08 %/A OUT Line Regulation V = 1.425V to 3.6V, V = 1.225V, I = 2mA -0.15 0 +0.15 % / V IN OUT OUT Dropout Voltage (V - V )V = 1.425V, I = 2A, V = 480mV 100 200 mV IN OUT IN OUT FB Current Limit V = 3.6V, V = 3V, V = 480mV 3.2 4 4.8 A IN OUT FB Output Shutdown Leakage V = 3.6V, V = 0V, V = 0V 0.5 50 A IN OUT EN FB I = 20mA, T = +85C 497 500 503 OUT A FB Threshold Accuracy mV V = 1.225V to 3V, V = (V + 0.2V) to 3.6V, OUT IN OUT 493 507 I = 2mA to 2A OUT FB Input Bias Current V = 0.5V, V = 3.6V 0.001 1A FB IN 2 MAX8526/MAX8527/MAX8528