MAX6329 Maxim, MAX6329 Datasheet
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MAX6329
Manufacturer Part Number
MAX6329
Description
150mA / SOT23 / Low-Dropout Linear Regulators with Internal Microprocessor Reset Circuit
Manufacturer
Maxim
Datasheet
1.MAX6329.pdf
(11 pages)
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.
19-1889; Rev 2; 4/01
Typical Operating Circuit appears at end of data sheet.
________________________Applications
Selector Guide appears at end of data sheet.
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.
150mA, SOT23, Low-Dropout Linear Regulators
Hand-Held Instruments
Electronic Planners
Palm Top Computers
PCMCIA Cards
USB Devices
Cellular Telephones
Cordless Telephones
Modems
with Internal Microprocessor Reset Circuit
________________________________________________________________ Maxim Integrated Products
General Description
o Preset +3.3V/+2.5V/+1.8V or Adjustable Regulator
o ±3.0% Regulator Accuracy Over the Specifed
o 25µA Supply Current
o Low 180mV Dropout at 100mA Load
o Small Output Capacitor (1µF min ceramic or
o Zero Reverse Leakage Current
o Thermal and Short-Circuit Protection
o Integrated Microprocessor Reset Circuit with
o Open-Drain and Push-Pull Reset Outputs
o Regulator Shutdown Input (MAX6329) or Manual
o 6-Pin SOT23 Package
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.
Output
Operating Range
tantalum)
100ms (min) Timeout
Reset Input (MAX6349)
MAX6329_ _ UT-T
MAX6349_ _ UT-T
TOP VIEW
PART
( ) ARE FOR MAX6349 ONLY.
(MR) SHDN
GND
IN
Ordering Information
TEMP. RANGE
1
2
3
0°C to +85°C
0°C to +85°C
SOT23-6
Pin Configuration
MAX6329/
MAX6349
6
5
4
Features
OUT
SET
RESET/RESET
6 SOT23-6
6 SOT23-6
PIN-
PACKAGE
1