Details, datasheet, quote on part number: MAX6349VP
PartMAX6349VP
CategoryPower Management => Supervisory Circuits => Microprocessor Supervisors
TitleReset Circuits
Description150mA, SOT23, Low-dropout Linear Regulators With Internal Microprocessor Reset Circuit
CompanyMaxim Integrated Products
DatasheetDownload MAX6349VP datasheet
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Features, Applications

150mA, SOT23, Low-Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349

The MAX6329/MAX6349 are low-dropout, micropower linear voltage regulators with integrated microprocessor reset circuits. Each is available with preset +1.8V, or adjustable output voltages and can deliver to 150mA load current. Employing internal Pchannel MOSFET pass transistors, the devices consume only 25A supply current, independent of the device load. The low supply current, low dropout voltage, and integrated reset functionality make these devices ideal for battery powered portable equipment. The MAX6329/MAX6349 include an internal reset circuit that indicates when the regulator output drops below standard microprocessor supply tolerances or -10%). The reset output remains asserted for 100ms (min) after the regulator output exceeds the selected reset threshold, ensuring that supply voltages and clock oscillators have stabilized before processor activity is enabled. Reset outputs are available in push-pull (activelow or -high) and open-drain (active-low) options. The internal reset circuit replaces external microprocessor supervisors or RC-based reset time delays. The MAX6329/MAX6349 are optimized for use with a 1F (min) output capacitor. The regulator output voltage is adjustable with an external resistor-divider network at SET (reset threshold voltages track the desired output voltage). Each device includes thermal shutdown protection, output short-circuit protection, and reverse leakage protection. The MAX6329 includes a shutdown feature to reduce regulator current below 1A (max) and the MAX6349 offers a manual reset input to assert a microprocessor reset while the regulator output is within specification.

Features

o Preset +3.3V/+2.5V/+1.8V or Adjustable Regulator Output o 3.0% Regulator Accuracy Over the Specifed Operating Range o 25A Supply Current o Low 180mV Dropout at 100mA Load o Small Output Capacitor (1F min ceramic or tantalum) o Zero Reverse Leakage Current o Thermal and Short-Circuit Protection o Integrated Microprocessor Reset Circuit with 100ms (min) Timeout o Open-Drain and Push-Pull Reset Outputs o Regulator Shutdown Input (MAX6329) or Manual Reset Input 6-Pin SOT23 Package

PART MAX6329_ _ UT-T MAX6349_ _ UT-T TEMP. RANGE to +85C PINPACKAGE 6 SOT23-6

Hand-Held Instruments Electronic Planners Palm Top Computers PCMCIA Cards USB Devices Cellular Telephones Cordless Telephones Modems

These parts offer a choice of regulator/reset voltages and reset outputs. From the Selector Guide, insert the desired suffix letters into the blanks to complete the part number. Each device is available in nine standard versions. Sample stock is generally held on standard versions only (see Standard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability of nonstandard versions.

Selector Guide appears at end of data sheet. Typical Operating Circuit appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349

to +7V SHDN to +7V SET GND..............................................-0.3V to (VOUT to +7V RESET, RESET to GND, (Push-Pull)..........0.3V to (VOUT + 0.3V) RESET GNd,(Open-Drain).....................-0.3V to (VOUT +0.3V) OUT to +7V Short-Circuit Duration.................................................Continuous Maximum Current into Any Pin (except IN, OUT)............20mA Continuous Power Dissipation (TA 6-Pin SOT23 (derate 7.1mW/C above +70C).............571mW Thermal Resistance (JA)............................................+140C/W Operating Temperature to +85C Junction Temperature......................................................+150C Storage Temperature to +150C 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.

(VIN to +85C. Typical values are at IOUT = 0, COUT = +25C, unless otherwise noted.) (Note 1)

PARAMETER Input Voltage Range Supply Current Shutdown Supply Current REGULATOR Maximum Output Current VIN to 5.5V, SET = GND, IOUT to 100mA, T/S Versions Output Voltage (Note 2) VOUT VIN to 5.5V, SET = GND, IOUT to 100mA, Z/Y Versions VIN to 5.5V, SET = GND, IOUT to 100mA, W/V Versions ILOAD = 10mA, T/S Versions ILOAD = 150mA, T/S Versions Dropout Voltage (Note 3) VDO ILOAD = 10mA, Z/Y Versions ILOAD = 150mA, Z/Y Versions ILOAD = 10mA, W/V Versions ILOAD = 150mA, W/V Versions Output Current Limit Input Reverse Leakage Current Startup-Time Response SHDN Input Voltage SHDN Input Current SET Reference Voltage SET Input Leakage Current Thermal Shutdown Temperature Thermal Shutdown Hysteresis VIL VIH I SHDN VSET ISET VIN = VOUT +1V VIN = 0, VOUT = 5.5V Rising edge of VIN or SHDN to VOUT = 68, SET = GND, 1F MAX6329 only SHDN = GND IN MAX6329 only 0.8 VIN V nA

150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit
(VIN to +85C. Typical values are at IOUT = 0, COUT = +25C, unless otherwise noted.) (Note 1)

PARAMETER RESET CIRCUIT MAX63_9T SET = GND MAX63_9S SET = GND MAX63_9Z SET = GND Reset Threshold (Note 2) VTH MAX63_9Y SET = GND MAX63_9W SET = GND MAX63_9V SET = GND MAX63_9T/Z/W SET = divider, Figure 1 (Note 4) MAX63_9S/Y/V SET = divider, Figure 1 (Note 4) Reset Timeout Period VOUT to Reset Delay MR Input Voltage MR Minimum Input Pulse MR Glitch Rejection MR to Reset Delay MR Pullup Resistance Open-Drain RESET Output Voltage Open-Drain Reset Output Leakage Current Push-Pull RESET Output Voltage VOL ILKG VOL VOH Push-Pull RESET Output Voltage VOL VOH VOUT 1.0V, ISINK = 50A VOUT < VTH (min), ISINK = 3.2mA VOUT > VTH (max), ISOURCE = 500A VOUT > VTH (max), ISINK = 3.2mA VOUT < VTH, ISOURCE 150A 0.8 VOUT 0.8 VOUT 0.4 V tRP tRD VIL VIH MAX6349 only MAX6349 only MAX6349 only MAX6349 only MAX6349 only VOUT > 1.0V, ISINK = 50A VOUT > 2.7V, ISINK 10 0.8 VOUT V SYMBOL CONDITIONS MIN TYP MAX UNITS

Note 1: Limits over temperature are guaranteed by design and not production tested. Note 2: Specification from 0C to less than 25C is guaranteed to four sigma only. Note 3: Dropout voltage is defined as VIN - VOUT when VOUT is 2% below the value of VOUT for VIN = VOUT + 1V. Note 4: VADJ + R1/R2), where VSET = 1.23V nominal.


 

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