MAX8880/MAX8881 19-1679 Rev 2 12/07 12V, Ultra-Low-I , Low-Dropout Q Linear Regulators with POK General Description Features The MAX8880/MAX8881 are ultra-low supply current, 3.5A Supply Current at 12V low-dropout linear regulators, capable of delivering up Reverse Battery Protection to 200mA. They are designed for battery-powered applications where reverse battery protection and long 2.5V to 12V Input Voltage Range battery life are critical. 1.5% Output Voltage Accuracy These regulators low 3.5A supply current extends bat- tery life in applications with long standby periods. Unlike 200mA max Output Current PNP-based designs, a 2 PMOS device maintains ultra- 2 PMOS Output Device low supply current throughout the entire operating range and in dropout. The parts are internally protected from Short-Circuit and Thermal Overload Protection output short circuits, reverse battery connection, and POK Output for Out-of-Regulation Indicator thermal overload. An internal power-OK (POK) com- parator indicates when the output is out of regulation. Fixed 1.8V, 2.5V, 3.3V, and 5V (MAX8881) Adjustable from 1.25V to 5V (MAX8880) The MAX8880 output is adjustable from 1.25V to 5V using an external resistor-divider. The MAX8881 pro- Tiny 6-Pin SOT23 Package vides only factory-preset output voltages of 1.8V, 2.5V, Thin 6-Pin TDFN Package 3.3V, or 5V (see Ordering Information). The devices are available in 6-pin SOT23 and 6-pin TDFN packages. Applications Smoke Detectors PDAs Handy Terminals Battery-Powered Alarms CMOS Backup Power Remote Transmitters Real-Time Clocks Smart Battery Packs Pin Configurations Typical Operating Circuit POK SHDN IN TOP VIEW V OUT V 6 5 4 IN 1.25V TO 5V IN OUT 2.5V TO 12V IN16 POK UP TO 200mA FB 1F 4.7F MAX8880 GND 2 5 SHDN MAX8881 MAX8880 MAX8881 REGULATION OK ON OUT34 FB SHDN POK OFF 1 2 3 GND FB GND OUT SOT23-6 TDFN 3mm x 3mm Ordering Information PART OUTPUT TEMP RANGE PIN-PACKAGE TOP MARK MAX8880EUT-T Adjustable -40C to +85C 6 SOT23-6 AAHR MAX8880ETT-T Adjustable -40C to +85C 6 TDFN AGS MAX8881EUT18-T 1.8V -40C to +85C 6 SOT23-6 AAHS MAX8881EUT25-T 2.5V -40C to +85C 6 SOT23-6 AAHT MAX8881EUT33-T 3.3V -40C to +85C 6 SOT23-6 AAHU MAX8881EUT50-T 5.0V -40C to +85C 6 SOT23-6 AAHV Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim s website at www.maxim-ic.com.12V, Ultra-Low-I , Low-Dropout Q Linear Regulators with POK ABSOLUTE MAXIMUM RATINGS IN to GND................................................................-14V to +14V OUT Continuous Current...................................................200mA OUT Short Circuit...........................................................Indefinite SHDN to GND.............................................-0.3V to (V + 0.3V), IN Continuous Power Dissipation (T = +70C) -0.3V to +0.3V when V < 0V A IN 6-Pin SOT23 (derate 8.7mW/C above +70C)...........696mW OUT, FB to GND...............................-0.3V to +6V when V > 5.7V, IN 6-Pin TDFN (derate 24.4mW/C above +70C) ........1951mW -0.3V to (V + 0.3V) when 0V V 5.7V, IN IN Operating Temperature Range ...........................-40C to +85C -0.3V to +0.3V when V < 0V IN Junction Temperature......................................................+150C POK to GND ...........................................................-0.3V to +14V Storage Temperature.........................................-65C to +165C Lead Temperature (soldering, 10s) .................................+300C 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, C = 4.7F, T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) IN OUT OUT A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V 2.5 12 V IN Supply Current I V = 12V 3.5 10 A IN IN Shutdown Supply Current I V = 0, V = 12V, V = 0, T = +25C 1.5 3 A IN(SHDN) SHDN IN OUT A Input Undervoltage Lockout V 2.1 2.4 V UVLO T = +25C 1.238 1.257 1.276 A FB Voltage, Adjustable MAX8880, V T = 0C to +85C 1.232 1.282 V FB A Mode I = 20mA OUT T = -40C to +85C 1.219 1.295 A T = +25C -1.5 1.5 A OUT Voltage Accuracy MAX8881, T = 0C to +85C -2 2 % A (Note 2) I = 20mA OUT T = -40C to +85C -3 3 A OUT Voltage Range V MAX8880 1.25 5.5 V OUT OUT Line Regulation V = V + 1V to 12V 0.01 0.05 %/V IN OUT OUT Load Regulation (Note 3) I = 10A to 100mA 0.006 0.015 %/mA OUT Current Limit (Note 3) I 200 400 mA OUT Dropout Voltage (Notes 3, 4) V I = 50mA 100 200 mV DO OUT IN Reverse Leakage Current I V = -12V, V = 0 1mA IN(REV) IN SHDN Foldback Current Limit I V = 5V, V = 0 250 mA OUT(SC) IN OUT V 2 IH SHDN Input Threshold V = 2.5V to 12V V IN V 0.5 IL SHDN Input Bias Current V = 0 to 12V, T = +25C -100 100 nA SHDN A FB Input Bias Current I FB = 1.25V, T = +25C, MAX8880 only 0 2 20 nA FB A Falling T = +25C 87.5 90.5 93.5 A % of POK Trip Threshold T = -40C to +85C 86 95 A V OUT Hysteresis 1.5 POK Off-Current I V = 12V, T = +25C 100 nA POK POK A POK Low Voltage V I = 1mA 50 200 mV POK POK 2 MAX8880/MAX8881