MAX1963A/MAX1976A 19-3684 Rev 1 5/12 Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN General Description Features The MAX1963A/MAX1976A low-dropout linear regula- Low 1.62V Minimum Input Voltage tors operate from a +1.62V to +3.6V supply and deliver Guaranteed 300mA Output Current a guaranteed 300mA continuous load current with a low 2.5% Accuracy Over Load/Line/Temp 100mV dropout. The high-accuracy (0.5%) output voltage is preset to an internally trimmed voltage in the Low 100mV Dropout at 300mA Load +0.75V to +3.0V range. An active-low, open-drain reset 2.2ms (MAX1963A) or 70ms (MAX1976A) output remains asserted for at least 2.2ms (MAX1963A) RESET Output Flag or 70ms (MAX1976A) after the output voltage reaches regulation. These devices are offered in thin SOT23 and Supply Current Independent of Load and thin DFN packages. An internal pMOS pass transistor Dropout Voltage allows the low supply current to remain independent of Logic-Controlled Shutdown load and dropout voltage, making these devices ideal for Thermal-Overload and Short-Circuit Protection portable battery-powered equipment. Preset Output Voltages (0.75V to 3.0V) Tiny 6-Pin Thin SOT23 Package (<1.1mm High) Applications TDFN Package (<0.8mm High) Notebook/Handheld Computers Cellular/Smart/PDA Phones Ordering Information DSC, CD/MP3 Players PART* TEMP RANGE PIN-PACKAGE PCMCIA Cards M A X19 6 3 A E Z T + T -40C to +85C 6 Thin SOT23-6 MAX1963AETT +T -40C to +85C 6 TDFN -6 3mm x 3mm Pin Configurations M AX1963A E TA +T -40C to +85C 8 TDFN -8 2mm x 2mm M A X19 7 6 A E Z T + T -40C to +85C 6 Thin SOT23-6 TOP VIEW M AX1976A E TT +T -40C to +85C 6 TDFN -6 3mm x 3mm + 87 6 5 M AX1976A E TA +T -40C to +85C 8 TDFN -8 2mm x 2mm IN 1 6 OUT MAX1976AETT /V+T -40C to +85C 6 TDFN -6 3mm x 3mm *Insert the desired three-digit suffix (see the Selector Guide) into MAX1963A MAX1963A the blanks to complete the part number. Contact the factory for GND 2 5 I.C. MAX1976A MAX1976A other output voltages. +Denotes a lead(Pb)-free/RoHS-compliant package. SHDN 3 4 RESET + 12 3 4 /V denotes an automotive-qualified part. Typical Operating Circuit THIN SOT23 TDFN 2mm x 2mm INPUT OUTPUT UP TO 1.62V TO 3.6V 0.75V TO 3.0V 65 4 300mA IN OUT C IN 1F LOGIC C OUT SUPPLY 4.7F MAX1963A MAX1963A MAX1976A MAX1976A 100k ON + 12 3 RESET SHDN TO C OFF GND TDFN 3mm x 3mm Selector Guide appears at end of data sheet. 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 I.C. SHDN GND RESET OUT IN N.C. N.C. SHDN I.C. GND RESETLow-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN ABSOLUTE MAXIMUM RATINGS Operating Temperature Range ...........................-40C to +85C IN, SHDN, RESET to GND.....................................-0.3V to +4.0V OUT to GND ................................................-0.3V to (V + 0.3V) Junction Temperature..................................................... +150C IN Storage Temperature Range .............................-65C to +150C Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (multilayer board, T = +70C) Lead Temperature (soldering, 10s) .................................+300C A Soldering Temperature (reflow) .......................................+260C 6-Pin SOT23 (derate 9.1mW/C above +70C)............727mW 6-Pin TDFN (derate 23.8mW/C above +70C) ......1904.8mW 8-Pin TDFN (derate 11.9mW/C above +70C) ........953.5mW 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 V rising or falling IN Input Undervoltage Lockout V 1.30 1.60 V UVLO (180mV typical hysteresis) I = 1mA to 300mA, OUT Output Voltage Accuracy -2.5 0.5 +2.5 % V = (V + 0.5V) to +3.6V IN OUT Maximum Output Current I Continuous 300 mA OUT RMS Current Limit I V = 96% of nominal value 450 550 650 mA LIM OUT No load 70 140 Ground Current I A Q I = 300mA 90 OUT Dropout (Note 2) 70 Dropout Voltage V - V I = 300mA, V 1.8V (Note 2) 100 200 mV IN OUT OUT OUT Load Regulation V I = 1mA to 300mA 0.02 0.3 % LDR OUT Line Regulation V V = (V + 0.5V) to +3.6V, I = 1mA -0.15 +0.01 +0.15 % / V LNR IN OUT OUT Output Noise 10Hz to 100kHz, I = 10mA, V = 1.5V 86 V OUT 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 = +25C 1 100 A SHDN Input Bias Current I V = 0V or 3.6V nA SHDN SHDN T = +85C 5 A Turn-On Delay From SHDN high to OUT high, V = 1.8V 90 s OUT 2 MAX1963A/MAX1976A