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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6349 Datasheet

150mA / SOT23 / Low-Dropout Linear Regulators

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19-1889; Rev 3; 3/04
150mA, SOT23, Low-Dropout Linear Regulators
with Internal Microprocessor Reset Circuit
General Description
The MAX6329/MAX6349 are low-dropout, micropower
linear voltage regulators with integrated microproces-
sor 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 P-
channel MOSFET pass transistors, the devices con-
sume only 25µA supply current, independent of the
device load. The low supply current, low dropout volt-
age, 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 (active-
low 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
1µF (min) output capacitor. The regulator output volt-
age is adjustable with an external resistor-divider net-
work at SET (reset threshold voltages track the desired
output voltage). Each device includes thermal shut-
down protection, output short-circuit protection, and
reverse leakage protection. The MAX6329 includes a
shutdown feature to reduce regulator current below
1µA (max) and the MAX6349 offers a manual reset
input to assert a microprocessor reset while the regula-
tor output is within specification.
________________________Applications
Hand-Held Instruments
Electronic Planners
Palm Top Computers
PCMCIA Cards
USB Devices
Cellular Telephones
Cordless Telephones
Modems
Features
o Preset +3.3V/+2.5V/+1.8V or Adjustable Regulator
Output
o ±3.0% Regulator Accuracy Over the Specifed
Operating Range
o 25µA Supply Current
o Low 180mV Dropout at 100mA Load
o Small Output Capacitor (1µF 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
TEMP RANGE
PIN-
PACKAGE
MAX6329_ _ UT-T
0°C to +85°C
6 SOT23-6
MAX6349_ _ UT-T
0°C to +85°C
6 SOT23-6
These parts offer a choice of regulator/reset voltages and reset
outputs. From the Selector Guide, insert the desired suffix let-
ters into the blanks to complete the part number. Each device
is available in nine standard versions. Sample stock is general-
ly 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
MAX6329/
GND 2 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 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6349 Datasheet

150mA / SOT23 / Low-Dropout Linear Regulators

No Preview Available !

150mA, SOT23, Low Dropout Linear Regulators
with Internal Microprocessor Reset Circuit
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 = +70°C)
6-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW
Thermal Resistance (θJA) ............................................+140°C/W
Operating Temperature Range...............................0°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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 = 0°C to +85°C. Typical values are at IOUT = 0, COUT = 2.2µF, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Range
Supply Current
Shutdown Supply Current
REGULATOR
VIN
IQ At GND
TA = +25oC
2.5 5.5 V
25 50 µA
1 µA
Maximum Output Current
150 mA
VIN = 4.0V to 5.5V, SET = GND, IOUT = 0 to
100mA, T/S Versions
3.20 3.3 3.40
Output Voltage (Note 2)
VOUT
VIN = 3.0V to 5.5V, SET = GND, IOUT = 0 to
100mA, Z/Y Versions
2.425 2.5 2.575
V
Dropout Voltage (Note 3)
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
VDO
VIL
VIH
I SHDN
VSET
ISET
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
ILOAD = 10mA, Z/Y Versions
ILOAD = 150mA, Z/Y Versions
ILOAD = 10mA, W/V Versions
ILOAD = 150mA, W/V Versions
VIN = VOUT +1V
VIN = 0, VOUT = 5.5V
Rising edge of VIN or SHDN to VOUT
RL = 68, SET = GND, CL = 1µF
MAX6329 only
SHDN = GND or IN MAX6329 only
1.745 1.8 1.855
20
300
25
300
60
600
350
0.01
30
360
35
400
200
750
1.5
mV
mA
µA
500 µs
0.8 VIN
-1
1.20
-10
0.1
1.23
160
20
0.3 VIN
1
1.26
+10
V
µA
V
nA
oC
oC
2 _______________________________________________________________________________________


Part Number MAX6349
Description 150mA / SOT23 / Low-Dropout Linear Regulators
Maker Maxim Integrated
PDF Download

MAX6349 Datasheet PDF






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