MAX8887/MAX8888 19-1859 Rev 4 7/09 Low-Dropout, 300mA Linear Regulators in SOT23 General Description Features Guaranteed 300mA Output Current (500mA for The MAX8887/MAX8888 low-dropout linear regulators Pulsed Loads) operate from a 2.5V to 5.5V input and deliver up to 300mA continuous (500mA pulsed) current. The Low 100mV Dropout at 200mA Load MAX8887 is optimized for low-noise operation, while the POK Output (MAX8888) MAX8888 includes an open-drain power-OK (POK) ouput 42V Output Noise (MAX8887) RMS flag. Both regulators feature exceptionally low 100mV Preset Output Voltages (1.5V, 1.8V, 2.85V, and dropout at 200mA. These devices are available in a vari- 3.3V) ety of preset output voltages in the 1.5V to 3.3V range. 55A No-Load Supply Current An internal PMOS pass transistor allows the low 55A Thermal-Overload and Short-Circuit Protection supply current to remain independent of load, making Foldback Output Current-Limit Protection these devices ideal for portable battery-powered equip- ment such as personal digital assistants (PDAs), cellu- 60dB PSRR at 1kHz lar phones, cordless phones, and notebook computers. 0.1A Shutdown Current Other features include a micropower shutdown mode, Thin 5-Pin SOT23 Package, 1mm High short-circuit protection, thermal shutdown protection, and an active-low open-drain POK output that indicates Ordering Information when the output is out of regulation. The MAX8887/MAX8888 are available in a thin 5-pin SOT23 TEMP PIN- T O P package that is only 1mm high. PART RANGE PACKAGE MARK M A X88 8 7 E Z K15+T -40C to +85C 5 SOT23 ADQD MAX8887EZK18+T -40C to +85C 5 SOT23 ADPX MAX8887EZK29+T -40C to +85C 5 SOT23 ADPY Applications MAX8887EZK33+T -40C to +85C 5 SOT23 ADPZ Notebook Computers MAX8887EZKxy+ T* -40C to +85C 5 SOT23 Wireless Handsets M A X88 8 8 E Z K15+T -40C to +85C 5 SOT23 ADQE PDAs and Palmtop Computers MAX8888EZK18+T -40C to +85C 5 SOT23 ADQA Digital Cameras MAX8888EZK18/V+ T -40C to +85C 5 SOT23 PCMCIA Cards MAX8888EZK29+T -40C to +85C 5 SOT23 ADQB MAX8888EZK33+T -40C to +85C 5 SOT23 ADQC Hand-Held Instruments MAX8888EZKxy+ T* -40C to +85C 5 SOT23 *Other versions (xy) between +1.5 and +3.3V are available in 100mV increments. Contact factory for other versions. Minimum order quantity is 25,000 units. +Denotes a lead(Pb)-free RoHS-compliant package. Typical Operating Circuit /V denotes an automotive qualified part. Pin Configurations V INPUT OUT 300mA 2.5V TO 5.5V IN OUT TOP VIEW C C IN OUT 2.2F 2.2F MAX8887 MAX8888 IN 15 OUT IN 15 OUT POK ON MAX8887 MAX8888 SHDN GND 2 GND 2 (BP) OFF C GND BP 0.01F SHDN34 BP SHDN34 POK ( ) ARE FOR MAX8887 ONLY. 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.Low-Dropout, 300mA Linear Regulators in SOT23 ABSOLUTE MAXIMUM RATINGS IN, SHDN, POK, to GND...........................................-0.3V to +7V Operating Temperature Range ...........................-40C to +85C Junction Temperature......................................................+150C OUT, BP to GND ............................................-0.3 to (V + 0.3V) IN Output Short-Circuit Duration.....................................Continuous Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+500C Continuous Power Dissipation (T = +70C) A 5-Pin SOT23 (derate 9.1mW/C above +70C)............727mW 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 (V = V + 1V, SHDN = IN, T = -40C to +85C, unless otherwise noted.) (Note 1) IN OUT A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V 2.5 5.5 V IN V rising IN Input Undervoltage Lockout 2.15 2.4 V (2% typical hysteresis) T = +25C, I = 100mA -1.2 +1.2 A OUT I = 100A to 300mA, OUT Output Voltage Accuracy -2 +2 % T = 0C to +85C A I = 100A to 300mA -3 +3 OUT Continuous 300 Maximum Output Current mA 10ms pulse 500 300 V = 0 OUT Current Limit mA V > 93% of nominal value 420 OUT No load 55 100 Ground-Pin Current A I = 300mA 65 OUT 0.5 I = 1mA OUT Dropout Voltage (Note 2) V = +3.3V I = 200mA 100 200 mV OUT OUT I = 300mA 150 OUT V = 2.5V or (V + 0.4V) to 5.5V, IN OUT Line Regulation -0.15 0 0.15 %/V I = 5mA OUT 10Hz to 100kHz, C = 0.01F, BP MAX8887 42 C = 2.2F, ESR < 0.1 OUT COUT Output Noise V RMS 10Hz to 100kHz, C = 2.2F, OUT MAX8888 360 ESR < 0.1 COUT f < 1kHz, C = 0.01F, BP MAX8887 60 C = 4.7F, ESR < 0.1 OUT COUT PSRR dB f < 1kHz, C = 2.2F, OUT MAX8888 40 ESR < 0.1 COUT 2 MAX8887/MAX8888