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19-1889; Rev 2; 4/01
150mA, SOT23, Low-Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349
General Description
The MAX6329/MAX6349 are low-dropout, micropower linear voltage regulators with integrated microprocessor reset circuits. Each is available with preset +3.3V, +2.5V, +1.8V, or adjustable output voltages and can deliver up 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 (-5% 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 (MAX6349) o 6-Pin SOT23 Package
Ordering Information
PART MAX6329_ _ UT-T MAX6349_ _ UT-T TEMP. RANGE 0C to +85C 0C to +85C PINPACKAGE 6 SOT23-6 6 SOT23-6
________________________Applications
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.
Pin Configuration
TOP VIEW
IN 1 6 OUT
GND 2
MAX6329/ MAX6349
5
SET
Selector Guide appears at end of data sheet. Typical Operating Circuit appears at end of data sheet.
(MR) SHDN
3
4
RESET/RESET
SOT23-6
( ) ARE FOR MAX6349 ONLY.
________________________________________________________________ Maxim Integrated Products
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349
ABSOLUTE MAXIMUM RATINGS
IN to GND .................................................................-0.3V to +7V SHDN to GND...........................................................-0.3V to +7V SET to GND ..............................................-0.3V to (VOUT + 0.3V) MR to GND ...............................................................-0.3V to +7V RESET, RESET to GND, (Push-Pull) ..........0.3V to (VOUT + 0.3V) RESET to GNd,(Open-Drain).....................-0.3V to (VOUT +0.3V) OUT to GND .............................................................-0.3V to +7V Short-Circuit Duration.................................................Continuous Maximum Current into Any Pin (except IN, OUT) ............20mA Continuous Power Dissipation (TA = +70C) 6-Pin SOT23 (derate 7.1mW/C above +70C).............571mW Thermal Resistance (JA) ............................................+140C/W Operating Temperature Range...............................0C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C 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.
ELECTRICAL CHARACTERISTICS
(VIN = +3.6V, TA = 0C to +85C. Typical values are at IOUT = 0, COUT = 2.2F, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER Input Voltage Range Supply Current Shutdown Supply Current REGULATOR Maximum Output Current VIN = 4.0V to 5.5V, SET = GND, IOUT = 0 to 100mA, T/S Versions Output Voltage (Note 2) VOUT VIN = 3.0V to 5.5V, SET = GND, IOUT = 0 to 100mA, Z/Y Versions VIN = 2.5V to 5.5V, SET = GND, IOUT = 0 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 RL = 68, SET = GND, CL = 1F MAX6329 only SHDN = GND or IN MAX6329 only 0.8 VIN -1 1.20 -10 160 20 0.1 1.23 1 1.26 +10 150 3.20 2.425 1.745 3.3 2.5 1.8 20 300 25 300 60 600 350 0.01 500 0.3 VIN 1.5 3.40 2.575 1.855 30 360 35 400 200 750 mA A s V A V nA
o o
SYMBOL VIN IQ At GND TA = +25oC
CONDITIONS
MIN 2.5
TYP 25
MAX 5.5 50 1
UNITS V A A mA
V
mV
C C
2
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +3.6V, TA = -0C to +85C. Typical values are at IOUT = 0, COUT = 2.2F, TA = +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 = 3.2mA 10 0.8 VOUT 1 120 500 20 50 0.3 0.4 1.0 0.3 0.4 V 2.92 2.75 2.21 2.08 1.59 1.50 3.185 3.02 2.41 2.28 1.74 1.65 V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6329/MAX6349
0.885 VADJ 0.965 VADJ 0.835 VADJ 0.915 VADJ 100 200 35 0.2 VOUT 300 ms s V s ns ns k V A
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 = VSET(1 + R1/R2), where VSET = 1.23V nominal.
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
GROUND PIN CURRENT vs. INPUT VOLTAGE
MAX6329/49 toc01
SHUTDOWN CURRENT vs. INPUT VOLTAGE
MAX6329/49 toc02
MAXIMUM PULSE DURATION vs. RESET THRESHOLD OVERDRIVE
MAX6329/49 toc03
40 35 GROUND PIN CURRENT (A) 30 25 20 15 10 5 0 0 1 2 3 4 5 6 INPUT VOLTAGE (V) IOUT = 150mA
11 10 SHUTDOWN CURRENT (nA) 9 8 7 6 5 4 3 2 1 0 2.5 3.0 3.5 4.0 4.5 5.0
250
200 PULSE DURATION (s)
IOUT = 0
150
RESET ASSERTS ABOVE THIS LINE
100
50
0 5.5 1 10 100 INPUT VOLTAGE (V) RESET THRESHOLD OVERDRIVE (VTH - VOUT) (mV)
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX6329/49 toc04
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX6329/49 toc05
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX6329/49 toc06
300 250 DROPOUT VOLTAGE (mV) 200
0 -10 -20 PSRR (dB) -30 -40 -50
3.5 3.0 OUTPUT VOLTAGE (V) 2.5 2.0 1.5 1.0 0.5
150 100 50 VOUT = 3.3V 0 0 30 60 90 120 150 LOAD CURRENT (mA)
COUT = 1F -60 0.01 0.1 1 10 FREQUENCY (kHz) 0 0 1 2 3 4
MAX63_9S/T 5 6
INPUT VOLTAGE (V)
REGION OF STABLE COUT ESR vs. LOAD CURRENT
MAX6329/49 toc07
OUTPUT NOISE
MAX6329/49 toc08
SHUTDOWN RESPONSE
MAX6329/49 toc09
150 125 100 75 50 25 STABLE REGION 0 0 COUT = 4.7F
SHDN 5V/div
COUT ESR ()
VOUT 10mV/div
OUT 5V/div
RESET 5V/div COUT = 1F 10ms/div 50ms/div
15 30 45 60 75 90 105 120 135 150 LOAD CURRENT (mA)
4
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
MAX6329/MAX6349
STARTUP RESPONSE
MAX6329/49 toc10
LOAD TRANSIENT RESPONSE
MAX6329/49 toc11
VIN 5V/div VOUT 50mV/div VOUT 2V/div
IOUT = 50mA COUT = 1F 20s/div 200s/div
VIN = 5V IOUT = 0 - 100mA
LOAD TRANSIENT RESPONSE NEAR DROPOUT
LINE TRANSIENT
MAX6329/49 toc13
MAX6329/49 toc12
5V VIN 4.5V VOUT 50mV/div
VOUT 50mV/div VIN = 3.6V IOUT = 0 - 100mA 200s/div 500s/div VIN = 3.6V IOUT = 0 - 100mA 50mA
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349
Pin Description
PIN 1 2 NAME IN GND SHDN 3 MR DESCRIPTION Regulator Input. Supply voltage can range from +2.5V to +5.5V. Ground. This pin also functions as a heatsink. Solder to large pads or the circuit board ground plane to maximize thermal dissipation. (MAX6329 Only) Active-Low Shutdown Input. A logic low reduces the supply current to < 1A. Connect (MAX6349 Only) Active-Low Manual Reset Input. A logic low forces a reset. Reset remains asserted for the duration of the reset timeout period after MR transitions from low to high. Leave unconnected or connect to VOUT if not used. MR has an internal pullup resistor of 20k (typ) to OUT. Active-Low Reset Output. RESET remains low while VOUT is below the reset threshold or while MR is held low. RESET remains low for the duration of the reset timeout period after the reset conditions are terminated. Active-High Reset Output. RESET remains high while VOUT is below the reset threshold or while MR is held low. RESET remains high for the duration of the reset timeout period after the reset conditions are terminated. Feedback Input for Setting the Output Voltage. Connect to GND to set the output voltage to the preset fixed value (+3.3V, +2.5V, or +1.8V). Connect to an external resistor-divider network for adjustable output operation. Regulator Output. Fixed (+3.3V, +2.5V, or +1.8V) or adjustable (+1.23V to +5.0V). Sources up to 150mA. Bypass with a 1F minimum capacitor for full rated performance.
RESET 4 RESET
5
SET
6
OUT
Detailed Description
The MAX6329/MAX6349 are low-dropout, low-quiescent current linear regulators with integrated microprocessor reset circuits. The devices drive loads up to 150mA and are available with preset output voltages of +3.3V, +2.5V, or +1.8V. The internal reset circuit monitors the regulator output voltage and asserts the reset output when the regulator output is below the microprocessor supply tolerance.
OUT is an internally regulated low dropout (LDO) linear regulator that powers a microprocessor.
Reset Circuit
The reset supervisor circuit is fully integrated in the MAX6329/MAX6349 and uses the same reference voltage as the regulator. Two supply tolerance reset thresholds, -5% and -10%, are provided for each type of device:
2.5V TO 5.5V
Regulator
The regulator core operates with an input voltage range of +2.5V to +5.5V. The output voltage is offered with three fixed voltage options (+3.3V, +2.5V, and +1.8V) for the MAX6329 and MAX6349. Enable the fixed voltage output by connecting SET to ground. The MAX6329/MAX6349 offer an adjustable output voltage that is implemented with an external resistor-divider network connected to OUT, SET, and GND (Figure 1). SET must be connected to either GND or the external divider. The MAX6329/MAX6349 automatically determine the feedback path depending on the voltage seen at SET. Featured characteristics include ultra-low quiescent current and low dropout voltage. The Typical Operating Circuit shows a typical connection for the MAX6329.
6
IN OUT
MAX6329 MAX6349
SET GND
R1
R2
Figure 1. Adjustable Output Voltage Configuration
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349
THERMAL SENSOR
IN SHDN
REVERSE LEAKAGE PROTECTION
OUT ERROR AMP MOS DRIVER WITH CURRENT LIMIT
SET
1.23V
FEEDBACK MODE COMPARATOR 200ms RESET DELAY
60mV
OUTPUT STAGE
RESET/RESET
RESET COMPARATOR
GND
MR
Figure 2. Functional Diagram
5% reset: Reset does not assert until the regulator output voltage is at least -5% out of tolerance and always asserts before the regulator output voltage is -10% out of tolerance. 10% reset: Reset does not assert until the regulator output voltage is at least -10% out of tolerance and always asserts before the regulator output voltage is -15% out of tolerance. Reset Output A P's reset input starts the P in a known state. The MAX6329/MAX6349 P supervisory circuits assert a reset during power-up, power-down, and brownout conditions. Reset is guaranteed to be logic high or low depending on the device chosen (see Selector Guide). RESET or RESET asserts when VOUT is below the reset
threshold and for at least 100ms (tRP) after VOUT rises above the reset threshold. RESET or RESET also asserts when MR is low (MAX6349).
Shutdown (MAX6329 only)
SHDN allows for the regulator to shutdown thereby reducing the total IIN consumption of the device. The MAX6329 provides a digitally controlled active-low shutdown function. In shutdown mode the pass transistor, control circuit, reference, and all biases turn off, reducing the supply current to below 1A. Connect SHDN to IN for normal operation.
Manual Reset Input (MAX6349 only)
Many P-based products require manual reset capability, allowing the operator, a test technician, or external logic circuitry to initiate a reset. For the MAX6349, a
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349
logic low on MR asserts reset while the regulator is still within tolerance. Reset remains asserted while MR is low and for the reset timeout period (100ms min) after MR returns high. The MR input has an internal pullup of 20k (typ) to OUT. This input can be driven with TTL/CMOS logic levels or with open-drain/collector outputs. Connect a normally open momentary switch from MR to GND to create a manual reset function; external debounce circuitry is not required. If MR is driven from long cables or the device is used in a noisy environment, connect a 0.1F capacitor from MR to GND to provide additional noise immunity. cuit board, the temperature difference between the die junction and the ambient air, and the rate of airflow. The power dissipation across the device is: P = IOUT (VIN - VOUT) The maximum power dissipation is: PMAX = (TJ - TA) / (JB + BA) where TJ - TA is the temperature difference between the die junction and the surrounding air, JB (or JC) is the thermal resistance of the package, and BA is the thermal resistance through the printed circuit board, copper traces, and other materials to the surrounding air. The MAX6329/MAX6349s' ground pin (GND) performs the dual function of providing an electrical connection to the system ground and channeling heat away. Connect GND to the system ground using a large pad or ground plane.
Reverse Leakage Protection
An internal circuit monitors the input and output voltages. When the output voltage is greater than the input voltage, the internal pass transistor and parasitic diodes turn off. OUT powers the device. There is no leakage path from OUT to IN. Therefore, the output can be powered from an auxiliary supply such as a backup battery without any need for additional blocking diodes.
Applications Information
Output Voltage Selection
The MAX6329/MAX6349 feature dual mode operation: they operate in either a preset voltage mode or an adjustable mode. In preset voltage mode, internal feedback resistors set the MAX6329/MAX6349 to +3.3V, +2.5V, or +1.8V (see Selector Guide). Select this mode by connecting SET to ground. In adjustable mode, select an output between 1.23V to 5.0V using two external resistors connected as a voltage divider to SET (Figure 1). The output voltage is set by the following equation: VOUT = VSET (1 + R1/R2) where VSET = 1.23V. To simplify resistor selection: R1 = R2 (VOUT/VSET - 1) Choose R2 100k to optimize power consumption, accuracy, and high-frequency power-supply rejection. Since the VSET tolerance is typically less than 30mV, the output can be set using fixed resistors instead of variable resistors. In preset voltage mode, impedance between SET and ground should be less than 50k.
Current Limit
The MAX6329/MAX6349 include a current limiter that monitors and controls the pass transistor's gate voltage, limiting the output current to 350mA (typ). The output can be shorted to ground for an indefinite period without damaging the part.
Thermal Overload Protection
When the junction temperature exceeds TJ = +160C, the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to cool. The thermal sensor will turn the pass transistor on again after the IC's junction temperature cools by 20C, resulting in a pulsed output during continuous thermaloverload conditions. Thermal overload protection is designed to protect the MAX6329/MAX6349 in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction temperature rating of TJ = +150C.
Operating Region and Power Dissipation
The MAX6329/MAX6349s' maximum power dissipation depends on the thermal resistance of the case and cir-
8
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit
Capacitor Selection and Regulator Stability
For stable operation over the full temperature range and with load currents up to 150mA, use a 1F (min) output capacitor. To reduce noise and improve load transient response, stability, and power-supply rejection, use large output capacitor values such as 10F. Note that some ceramic dielectrics exhibit large capacitance and ESR variation with temperature. With dielectrics such as Z5U and Y5V, it may be necessary to use 2.2F or more to ensure stability at temperatures below -10C. With X7R or X5R dielectrics, 1F should be sufficient at all operating temperatures. A graph of the Region of Stable COUT ESR vs. Load Current is shown in the Typical Operating Characteristics. To improve power-supply rejection and transient response use a 1F capacitor between IN and GND. Operating Characteristics section shows a graph of the Maximum Transient Duration vs. Reset Threshold Overdrive for which reset is not asserted. The graph was produced using negative going OUT transients starting at OUT and ending below the reset threshold by the magnitude indicated (Reset Threshold Overdrive). The graph shows the maximum pulse width that a negative going OUT transient can typically have without triggering a reset pulse. As the amplitude of the transient increases (i.e., goes further below the reset threshold), the maximum allowable pulse width decreases. Typically, an OUT transient that goes only 10mV below the reset threshold and lasts for 75s will not trigger a reset pulse.
MAX6329/MAX6349
Input-Output (Dropout) Voltage
A regulator's minimum input-output voltage differential (or dropout voltage) determines the lowest useable supply voltage. In battery powered systems, this will determine the useful end-of-life battery voltage. Since the MAX6329/MAX6349 use a P-channel MOSFET pass transistor, their dropout voltage is a function of RDS(ON) multiplied by the load current (see Electrical Characteristics).
Chip Information
TRANSISTOR COUNT: 800 PROCESS: BiCMOS
Negative Going OUT Transients
These supervisors are relatively immune to short-duration, negative going OUT transients. The Typical
Typical Operating Circuit
2.5V TO 5.5V
IN SHDN
OUT 1F
VCC P
MAX6329
SET RESET RESET GND
GND
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150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit MAX6329/MAX6349
Selector Guide
REGULATOR OUTPUT VOLTAGE PACKAGE INFORMATION MAX6329TP MAX6329TL MAX6329TH MAX6329SP MAX6329SL MAX6329SH MAX6329ZP MAX6329ZL MAX6329ZH MAX6329YP MAX6329YL MAX6329YH MAX6329WP MAX6329WL MAX6329WH MAX6329VP MAX6329VL MAX6329VH MAX6349TP MAX6349TL MAX6349TH MAX6349SP MAX6349SL MAX6349SH MAX6349ZP MAX6349ZL MAX6349ZH MAX6349YP MAX6349YL MAX6349YH MAX6349WP MAX6349WL MAX6349WH MAX6349VP MAX6349VL MAX6349VH SHDN * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * MR 3.3V * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 2.5V 1.8V VOUT RESET TOLERANCE -5% VTH T/Z/W * * * * * * * * * * * * -10% VTH S/Y/V OPENDRAIN (P) * * * RESET OUTPUT RESET PUSHPULL (L) RESET PUSH-PULL (H)
TOP MARK AAIP AAIO AAIN AAIM AAIL AAIK AAJB AAJA AAIZ AAIY AAIX AAIW AAIV AAIU AAIT AAIS AAIR AAIQ AAJH AAJG AAJF AAJE AAJD AAJC AAJT AAJS AAJR AAJQ AAJP AAJO AAJN AAJM AAJL AAJK AAJJ AAJI
Bold items indicate standard versions. Samples are generally available on standard versions only. Contact factory for availability of nonstandard versions. 10 ______________________________________________________________________________________
150mA, SOT23, Low Dropout Linear Regulators with Internal Microprocessor Reset Circuit
Package Information
6LSOT.EPS
MAX6329/MAX6349
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________11 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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