MAX6329/MAX6349 19-1889 Rev 3 3/04 150mA, SOT23, Low-Dropout Linear Regulators with Internal Microprocessor Reset Circuit General Description Features The MAX6329/MAX6349 are low-dropout, micropower Preset +3.3V/+2.5V/+1.8V or Adjustable Regulator linear voltage regulators with integrated microproces- Output sor reset circuits. Each is available with preset +3.3V, 3.0% Regulator Accuracy Over the Specifed +2.5V, +1.8V, or adjustable output voltages and can deliver up to 150mA load current. Employing internal P- Operating Range channel MOSFET pass transistors, the devices con- 25A Supply Current sume only 25A supply current, independent of the device load. The low supply current, low dropout volt- Low 180mV Dropout at 100mA Load age, and integrated reset functionality make these Small Output Capacitor (1F min ceramic or devices ideal for battery powered portable equipment. tantalum) The MAX6329/MAX6349 include an internal reset circuit that indicates when the regulator output drops below Zero Reverse Leakage Current standard microprocessor supply tolerances (-5% or Thermal and Short-Circuit Protection -10%). The reset output remains asserted for 100ms (min) after the regulator output exceeds the selected Integrated Microprocessor Reset Circuit with reset threshold, ensuring that supply voltages and clock 100ms (min) Timeout oscillators have stabilized before processor activity is Open-Drain and Push-Pull Reset Outputs enabled. Reset outputs are available in push-pull (active- low or -high) and open-drain (active-low) options. The Regulator Shutdown Input (MAX6329) or Manual internal reset circuit replaces external microprocessor Reset Input (MAX6349) supervisors or RC-based reset time delays. 6-Pin SOT23 Package The MAX6329/MAX6349 are optimized for use with a 1F (min) output capacitor. The regulator output volt- Ordering Information age is adjustable with an external resistor-divider net- work at SET (reset threshold voltages track the desired PIN- PART TEMP RANGE output voltage). Each device includes thermal shut- PACKAGE down protection, output short-circuit protection, and MAX6329 UT-T 0C to +85C 6 SOT23-6 reverse leakage protection. The MAX6329 includes a MAX6349 UT-T 0C to +85C 6 SOT23-6 shutdown feature to reduce regulator current below 1A (max) and the MAX6349 offers a manual reset These parts offer a choice of regulator/reset voltages and reset input to assert a microprocessor reset while the regula- outputs. From the Selector Guide, insert the desired suffix let- ters into the blanks to complete the part number. Each device tor output is within specification. is available in nine standard versions. Sample stock is general- Applications ly held on standard versions only (see Standard Versions table). Standard versions have an order increment requirement Hand-Held Instruments of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability of Electronic Planners nonstandard versions. Palm Top Computers Pin Configuration PCMCIA Cards USB Devices TOP VIEW Cellular Telephones IN16 OUT Cordless Telephones Modems MAX6329/ GND 2 5 SET MAX6349 Selector Guide appears at end of data sheet. (MR) SHDN34 RESET/RESET Typical Operating Circuit appears at end of data sheet. SOT23-6 ( ) ARE FOR MAX6349 ONLY. 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.150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit ABSOLUTE MAXIMUM RATINGS IN to GND.................................................................-0.3V to +7V Continuous Power Dissipation (T = +70C) A SHDN to GND...........................................................-0.3V to +7V 6-Pin SOT23 (derate 7.1mW/C above +70C).............571mW SET to GND ..............................................-0.3V to (V + 0.3V) Thermal Resistance ( ) ............................................+140C/W OUT JA MR to GND ...............................................................-0.3V to +7V Operating Temperature Range...............................0C to +85C RESET, RESET to GND, (Push-Pull) ..........0.3V to (V + 0.3V) Junction Temperature......................................................+150C OUT RESET to GNd,(Open-Drain).....................-0.3V to (V +0.3V) Storage Temperature Range .............................-65C to +150C OUT OUT to GND .............................................................-0.3V to +7V Lead Temperature (soldering, 10s) .................................+300C Short-Circuit Duration.................................................Continuous Maximum Current into Any Pin (except IN, OUT) ............20mA 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 = +3.6V, T = 0C to +85C. Typical values are at I = 0, C = 2.2F, T = +25C, unless otherwise noted.) (Note 1) IN A OUT OUT A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V 2.5 5.5 V IN Supply Current I At GND 25 50 A Q o Shutdown Supply Current T = +25C1A A REGULATOR Maximum Output Current 150 mA V = 4.0V to 5.5V, SET = GND, I = 0 to IN OUT 3.20 3.3 3.40 100mA, T/S Versions V = 3.0V to 5.5V, SET = GND, I = 0 to IN OUT Output Voltage (Note 2) V 2.425 2.5 2.575 V OUT 100mA, Z/Y Versions V = 2.5V to 5.5V, SET = GND, I = 0 to IN OUT 1.745 1.8 1.855 100mA, W/V Versions I = 10mA, T/S Versions 20 30 LOAD I = 150mA, T/S Versions 300 360 LOAD I = 10mA, Z/Y Versions 25 35 LOAD Dropout Voltage (Note 3) V mV DO I = 150mA, Z/Y Versions 300 400 LOAD I = 10mA, W/V Versions 60 200 LOAD I = 150mA, W/V Versions 600 750 LOAD Output Current Limit V = V +1V 350 mA IN OUT Input Reverse Leakage Current V = 0, V = 5.5V 0.01 1.5 A IN OUT Rising edge of V or SHDN to V IN OUT Startup-Time Response 500 s R = 68 , SET = GND, C = 1F L L V 0.3 V IL IN SHDN Input Voltage MAX6329 only V V 0.8 V IH IN SHDN Input Current I SHDN = GND or IN MAX6329 only -1 0.1 1 A SHDN SET Reference Voltage V 1.20 1.23 1.26 V SET SET Input Leakage Current I -10 +10 nA SET o Thermal Shutdown Temperature 160 C o Thermal Shutdown Hysteresis 20 C 2 MAX6329/MAX6349