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MAX6329THUT-T

P1-P3P4-P6P7-P9P10-P11
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
♦ Preset +3.3V/+2.5V/+1.8V or Adjustable Regulator
Output
♦ ±3.0% Regulator Accuracy Over the Specifed
Operating Range
♦ 25µA Supply Current
♦ Low 180mV Dropout at 100mA Load
♦ Small Output Capacitor (1µF min ceramic or
tantalum)
♦ Zero Reverse Leakage Current
♦ Thermal and Short-Circuit Protection
♦ Integrated Microprocessor Reset Circuit with
100ms (min) Timeout
♦ Open-Drain and Push-Pull Reset Outputs
♦ Regulator Shutdown Input (MAX6329) or Manual
Reset Input (MAX6349)
♦ 6-Pin SOT23 Package
MAX6329/MAX6349
150mA, SOT23, Low-Dropout Linear Regulators
with Internal Microprocessor Reset Circuit
________________________________________________________________ Maxim Integrated Products 1
GND
RESET/RESET
16OUT
5 SET
IN
MAX6329/
MAX6349
SOT23-6
TOP VIEW
2
34
(MR) SHDN
( ) ARE FOR MAX6349 ONLY.
Pin Configuration
19-1889; Rev 3; 3/04
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.
Typical Operating Circuit appears at end of data sheet.
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.
MAX6329/MAX6349
150mA, SOT23, Low Dropout Linear Regulators
with Internal Microprocessor Reset Circuit
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +3.6V, T
A
= 0°C to +85°C. Typical values are at I
OUT
= 0, C
OUT
= 2.2µF, T
A
= +25°C, unless otherwise noted.) (Note 1)
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.
IN to GND .................................................................-0.3V to +7V
SHDN to GND...........................................................-0.3V to +7V
SET to GND ..............................................-0.3V to (V
OUT
+ 0.3V)
MR to GND ...............................................................-0.3V to +7V
RESET, RESET to GND, (Push-Pull) ..........0.3V to (V
OUT
+ 0.3V)
RESET to GNd,(Open-Drain).....................-0.3V to (V
OUT
+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 (T
A
= +70°C)
6-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW
Thermal Resistance (θ
JA
) ............................................+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
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Input Voltage Range V
IN
2.5 5.5 V
Supply Current I
Q
At GND 25 50 µA
Shutdown Supply Current T
A
= +25
o
C1µA
REGULATOR
Maximum Output Current
150
mA
V
IN
= 4.0V to 5.5V, SET = GND, I
OUT
= 0 to
100mA, T/S Versions
3.20
3.3
3.40
V
IN
= 3.0V to 5.5V, SET = GND, I
OUT
= 0 to
100mA, Z/Y Versions
2.425
2.5
2.575
Output Voltage (Note 2)
V
OUT
V
IN
= 2.5V to 5.5V, SET = GND, I
OUT
= 0 to
100mA, W/V Versions
1.745
1.8
1.855
V
I
LOAD
= 10mA, T/S Versions 20 30
I
LOAD
= 150mA, T/S Versions 300 360
I
LOAD
= 10mA, Z/Y Versions 25 35
I
LOAD
= 150mA, Z/Y Versions 300 400
I
LOAD
= 10mA, W/V Versions 60 200
Dropout Voltage (Note 3)
∆V
DO
I
LOAD
= 150mA, W/V Versions 600 750
mV
Output Current Limit V
IN
= V
OUT
+1V 350 mA
Input Reverse Leakage Current V
IN
= 0, V
OUT
= 5.5V
0.01
1.5 µA
Startup-Time Response
Rising edge of V
IN
or SHDN to V
OUT
R
L
= 68Ω, SET = GND, C
L
= 1µF
500 µs
V
IL
0.3
✕
V
IN
SHDN Input Voltage
V
IH
MAX6329 only
0.8
✕
V
IN
V
SHDN Input Current
I
SHDN
SHDN = GND or IN MAX6329 only -1 0.1 1 µA
SET Reference Voltage V
SET
1.20 1.23 1.26
V
SET Input Leakage Current I
SET
-10
+10
nA
Thermal Shutdown Temperature 160
o
C
Thermal Shutdown Hysteresis 20
o
C
MAX6329/MAX6349
150mA, SOT23, Low Dropout Linear Regulators
with Internal Microprocessor Reset Circuit
_______________________________________________________________________________________ 3
Note 1: Limits over temperature are guaranteed by design and not production tested.
Note 2: Specification from 0°C to less than 25°C is guaranteed to four sigma only.
Note 3: Dropout voltage is defined as V
IN
- V
OUT
when V
OUT
is 2% below the value of V
OUT
for V
IN
= V
OUT
+ 1V.
Note 4: V
ADJ
= V
SET
(1 + R1/R2), where V
SET
= 1.23V nominal.
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
RESET CIRCUIT
MAX63_9T SET = GND
2.92 3.185
MAX63_9S SET = GND
2.75 3.02
MAX63_9Z SET = GND
2.21 2.41
MAX63_9Y SET = GND
2.08 2.28
MAX63_9W SET = GND
1.59 1.74
MAX63_9V SET = GND
1.50 1.65
M AX63_9T/Z /W SE T = d i vi d er, Fig ur e 1 (N ote 4)
0.885
✕
V
AD J
0.965
✕
V
AD J
Reset Threshold (Note 2) V
TH
M AX63_9S /Y /V SE T = d i vi d er, Fig ur e 1 (N ote 4)
0.835
✕
V
AD J
0.915
✕
V
AD J
V
Reset Timeout Period t
RP
100
200 300 ms
V
OUT
to Reset Delay t
RD
35 µs
V
IL
0.2
✕
V
OUT
MR Input Voltage
V
IH
MAX6349 only
0.8
✕
V
OUT
V
MR Minimum Input Pulse MAX6349 only 1 µs
MR Glitch Rejection MAX6349 only 120 ns
MR to Reset Delay MAX6349 only 500 ns
MR Pullup Resistance MAX6349 only 10 20 50 kΩ
V
OUT
>
1.0V, I
SINK
= 50µA
0.3
Open-Drain RESET Output
Voltage
V
OL
V
OUT
>
2.7V, I
SINK
= 3.2mA
0.4
V
Open-Drain Reset Output
Leakage Current
I
LKG
1.0 µA
V
OUT
≥ 1.0V, I
SINK
= 50µA
0.3
V
OL
V
OUT
< V
TH
(min), I
SINK
= 3.2mA
0.4
Push-Pull RESET Output Voltage
V
OH
V
OUT
> V
TH
(max), I
SOURCE
= 500µA 0.8
✕
V
OUT
V
V
OL
V
OUT
> V
TH
(max), I
SINK
= 3.2mA
0.4
Push-Pull RESET Output Voltage
V
OH
V
OUT
< V
TH
, I
SOURCE
= 150µA 0.8
✕
V
OUT
V
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +3.6V, T
A
= -0°C to +85°C. Typical values are at I
OUT
= 0, C
OUT
= 2.2µF, T
A
= +25°C, unless otherwise noted.) (Note 1)
P1-P3P4-P6P7-P9P10-P11

MAX6329THUT-T

Mfr. #:
Buy MAX6329THUT-T
Manufacturer:
Maxim Integrated
Description:
IC REG LIN POS ADJ 150MA SOT23-6
Lifecycle:
New from this manufacturer.
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