MAX1589A 19-3664 Rev 0 4/05 Low-Input-Voltage, 500mA LDO Regulator with RREESSEETT in SOT and TDFN General Description Features Low 1.62V Minimum Input Voltage The MAX1589A low-dropout linear regulator operates from a +1.62V to +3.6V supply and delivers a guaran- Guaranteed 500mA Output Current teed 500mA continuous load current with a low 175mV 0.5% Initial Accuracy dropout. The high-accuracy (0.5%) output voltage is Low 175mV Dropout at 500mA Load preset to internally trimmed voltages from +0.75V to 70ms RESET Output Flag +3.0V. An active-low, open-drain reset output remains Supply Current Independent of Load and Dropout asserted for at least 70ms after the output voltage reach- Voltage es regulation. This device is offered in 6-pin thin SOT23 Logic-Controlled Shutdown and 6-pin, 3mm x 3mm thin DFN packages. Thermal-Overload and Short-Circuit Protection An internal pMOS pass transistor maintains low supply Preset Output Voltages (0.75V, 1.0V, 1.3V, 1.5V, current, independent of load and dropout voltage, making 1.8V, 2.5V, and 3.0V) the MAX1589A ideal for portable battery-powered equip- Tiny 6-Pin Thin SOT23 Package (<1.1mm High) ment such as personal digital assistants (PDAs), digital Thin 6-Pin TDFN Package (<0.8mm High) still cameras, cell phones, cordless phones, and note- book computers. Other features include logic-controlled Ordering Information shutdown, short-circuit protection, and thermal-overload PART* TEMP RANGE PIN-PACKAGE protection. MAX1589AEZT +T -40C to +85C 6 Thin SOT23-6 MAX1589AETT + -40C to +85C 6 TDFN *Insert the desired three-digit suffix (see the Selector Guide) into the blanks to complete the part number. Contact the factory for other output voltages. Applications +Denotes lead-free packaging. Notebook Computers Selector Guide Cellular and PCS Phones MAX1589A V Personal Digital Assistants (PDAs) OUT TOP MARK SUFFIX (V) Handheld Computers SOT TDFN Digital Still Cameras 0.75 075 AACC ALG 1.00 100 AACD ALH PCMCIA Cards 1.30 130 AACE ALI CD and MP3 Players 1.50 150 AACF ALJ 1.80 180 AACG ALK 2.50 250 AACH ALF 3.00 300 AACI ALL Typical Operating Circuit Pin Configurations TOP VIEW INPUT OUTPUT 1.62V TO 3.6V 0.75V TO 3.0V 500mA IN OUT 6 5 4 C C IN OUT IN 1 6 OUT 1 F 4.7 F LOGIC SUPPLY MAX1589A MAX1589A MAX1589A 100k GND 2 5 I.C. ON SHDN RESET TO C 1 2 3 SHDN 3 4 RESET OFF GND TDFN THIN SOT23 3mm x 3mm Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. OUT IN SHDN I.C. GND RESETLow-Input-Voltage, 500mA LDO Regulator with RREESSEETT in SOT and TDFN ABSOLUTE MAXIMUM RATINGS Operating Temperature Range ...........................-40C to +85C IN, SHDN, RESET to GND.....................................-0.3V to +4.0V Junction Temperature..................................................... +150C OUT to GND ................................................-0.3V to (V + 0.3V) IN Output Short-Circuit Duration.....................................Continuous Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) A 6-Pin Thin SOT23 (derate 9.1mW/C above +70C)....727mW 6-Pin TDFN (derate 24.4mW/C above +70C) .........1951mW 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 + 0.5V) or 1.8V, whichever is greater SHDN = IN, C = 1F, C = 4.7F, T = -40C to +85C, unless otherwise IN OUT IN OUT A noted. Typical values are at T = +25C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V 1.62 3.60 V IN Input Undervoltage Lockout V V rising (180mV typical hysteresis) 1.30 1.60 V UVLO IN I = 150mA, T = +25C -0.5 +0.5 OUT A Output Voltage Accuracy % I = 1mA to 500mA, OUT -1.5 +1.5 V = (V + 0.5V) to +3.6V IN OUT Maximum Output Current I Continuous 500 mA OUT RMS Current Limit I V = 96% of nominal value 550 850 1150 mA LIM OUT No load 70 140 Ground Current I A I = 500mA 90 Q OUT Dropout (Note 2) 70 Dropout Voltage V - V I = 500mA, V 1.8V (Note 2) 175 350 mV IN OUT OUT OUT Load Regulation V I = 1mA to 500mA 0.02 0.5 % LDR OUT Line Regulation V V = (V + 0.5V) to +3.6V, I = 100mA -0.15 +0.01 +0.15 % / V LNR IN OUT OUT Output Noise 10Hz to 100kHz, I = 10mA 86 V OUT RMS PSRR f < 1kHz, I = 10mA 70 dB OUT SHUTDOWN T = +25C 0.001 1 A Shutdown Supply Current I SHDN = GND A OFF T = +85C 0.01 A V V = 1.62V to 3.6V 1.4 IH IN SHDN Input Logic Levels V V V = 1.62V to 3.6V 0.6 IL IN T = +25C1 300 A SHDN Input Bias Current I V = 0V or 3.6V nA SHDN SHDN T = +85C5 A Turn-On Delay From SHDN high to OUT high, V = 1.5V 90 s OUT RESET OUTPUT Reset Threshold Accuracy V falling (1.7% typical hysteresis) 80 82.5 85 %V OUT OUT I = 100A 1.5 100 RESET RESET Output Low Voltage V mV OL V = +1.0V, I = 100A 3 100 IN RESET 2 MAX1589A