MAX1589ETT180+ ,Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFNApplicationsother output voltages.Selector GuideNotebook ComputersCellular and PCS TelephonesMAX158 ..
MAX1589ETT180+T ,Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFNApplicationsother output voltages.Selector GuideNotebook ComputersCellular and PCS TelephonesMAX158 ..
MAX1589ETT250+ ,Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFNFeatures Low 1.62V Minimum Input VoltageThe MAX1589 low-dropout linear regulator operatesfrom a +1 ..
MAX1589ETT250+T ,Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFNfeatures include logic-controlledOrdering Informationshutdown, short-circuit protection, and therma ..
MAX1589EZT075-T ,Low-input-voltage, 500mA LDO regulator with RESET, out=0.75VApplicationsother output voltages.Selector GuideNotebook ComputersCellular and PCS TelephonesMAX158 ..
MAX1589EZT150-T ,Low-input-voltage, 500mA LDO regulator with RESET, out=1.5VELECTRICAL CHARACTERISTICS(V = (V + 0.5V) or V = 1.8V, whichever is greater; SHDN = IN, C = 1µF, C ..
MAX4257ESA ,Quad, single-supply operation +2.4V to 5.5V, low-noise, low-distortion, Rail-to-Rail op amp. Gain bandwidth 22MHz, min stable gain 10V/V.ELECTRICAL CHARACTERISTICS(V = +5V, V = 0V, V = 0V, V = V /2, R tied to V /2, SHDN = V or open, T = ..
MAX4257ESA+ ,UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Ampsapplications that require low distortion and/or low noise.LoadFor additional power conservation, th ..
MAX4258ESA ,350MHz/250MHz / 2-Channel Video Multiplexer-AmplifiersMAX4158/MAX4159/MAX4258/MAX425919-1164; Rev 1; 3/97350MHz/250MHz, 2-Channel Video Multiplexer-Ampli ..
MAX4258EUA ,350MHz/250MHz / 2-Channel Video Multiplexer-AmplifiersGeneral Description ________
MAX4259EEE ,350MHz/250MHz / 2-Channel Video Multiplexer-AmplifiersFeaturesThe MAX4158/MAX4159/MAX4258/MAX4259 are wide- ' Excellent Video Specifications:band, 2-chan ..
MAX4271ESA ,3V to 12V Current-Limiting Hot Swap Controllers with Autoretry / DualSpeed/BiLevel Fault Protection
MAX1589ETT100+T-MAX1589ETT150+-MAX1589ETT180+-MAX1589ETT180+T-MAX1589ETT250+-MAX1589ETT250+T
Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFN
General DescriptionThe MAX1589 low-dropout linear regulator operates
from a +1.62V to +3.6V supply and delivers a guaran-
teed 500mA continuous load current with a low 175mV
dropout. The high-accuracy (±0.5%) output voltage is
preset to internally trimmed voltages from +0.75V to
+3.0V. An active-low, open-drain reset output remains
asserted for at least 70ms after the output voltage reach-
es regulation. This device is offered in 6-pin thin SOT23
and 6-pin 3mm x 3mm thin DFN packages.
An internal PMOS pass transistor maintains low supply
current, independent of load and dropout voltage, making
the MAX1589 ideal for portable battery-powered equip-
ment such as personal digital assistants (PDAs), digital
still cameras, cell phones, cordless phones, and note-
book computers. Other features include logic-controlled
shutdown, short-circuit protection, and thermal-
overload protection.
ApplicationsNotebook Computers
Cellular and PCS Telephones
Personal Digital Assistants (PDAs)
Hand-Held Computers
Digital Still Cameras
PCMCIA Cards
CD and MP3 Players
FeaturesLow 1.62V Minimum Input VoltageGuaranteed 500mA Output Current±0.5% InitialAccuracyLow 175mV Dropout at 500mA Load70ms RESETOutput FlagSupply Current Independent of Load and Dropout
VoltageLogic-Controlled ShutdownThermal-Overload and Short-Circuit ProtectionPreset Output Voltages (0.75V, 1.0V, 1.3V, 1.5V,
1.8V, 2.5V, and 3.0V)Tiny 6-Pin Thin SOT23 Package (<1.1mm High)Thin 6-Pin TDFN Package (<0.8mm High)
MAX1589
Low-Input-Voltage, 500mA LDO Regulator
with RREESSEETT
in SOT and TDFN
Pin Configurations
Typical Operating Circuit19-3048; Rev 0; 10/03
*Insert the desired three-digit suffix (see the Selector Guide) into
the blanks to complete the part number. Contact the factory for
other output voltages.
Selector Guide
Ordering Information
MAX1589
Low-Input-Voltage, 500mA LDO Regulator
with RREESSEETT
in SOT and TDFN
ABSOLUTE MAXIMUM RATINGSStresses 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, SHDN, RESETto GND.....................................-0.3V to +4.0V
OUT to GND................................................-0.3V to (VIN+ 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (TA= +70°C)
6-Pin Thin SOT23 (derate 9.1mW/°C above +70°C)....727mW
6-Pin TDFN (derate 24.4mW/°C above +70°C).........1951mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature.....................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS(VIN= (VOUT+ 0.5V) or VIN= 1.8V, whichever is greater; SHDN= IN, CIN= 1µF, COUT= 4.7µF, TA= -40°C to +85°C, unless other-
MAX1589
Low-Input-Voltage, 500mA LDO Regulator
with RREESSEETT
in SOT and TDFN
Note 2:The dropout voltage is defined as VIN- VOUT, when VOUTis 4% lower than the value of VOUTwhen VIN= VOUT+ 0.5V.
ELECTRICAL CHARACTERISTICS (continued)(VIN= (VOUT+ 0.5V) or VIN= 1.8V, whichever is greater; SHDN= IN, CIN= 1µF, COUT= 4.7µF, TA= -40°C to +85°C, unless other-
wise noted. Typical values are at TA= +25°C.) (Note 1)
OUTPUT VOLTAGE ACCURACY
vs. LOAD CURRENTMAX1589 toc01
LOAD CURRENT (mA)
OUTPUT VOLTAGE ACCURACY (%)
OUTPUT VOLTAGE ACCURACY
vs. INPUT VOLTAGE
MAX1589 toc02
INPUT VOLTAGE (V)
OUTPUT VOLTAGE ACCURACY (%)
OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
MAX1589 toc03
TEMPERATURE (°C)
OUTPUT VOLTAGE ACCURACY (%)3510-15
GROUND-PIN CURRENT
vs. LOAD CURRENT
MAX1589 toc04
LOAD CURRENT (mA)
GROUND-PIN CURRENT (
GROUND-PIN CURRENT
vs. INPUT VOLTAGE
MAX1589 toc05
INPUT VOLTAGE (V)
GROUND-PIN CURRENT (
GROUND-PIN CURRENT
vs. TEMPERATURE
MAX1589 toc06
TEMPERATURE (°C)
GROUND-PIN CURRENT (3510-15
Typical Operating Characteristics
(VIN= (VOUT+ 0.5V) or 1.8V, whichever is greater; SHDN= IN, CIN= 1µF, COUT= 4.7µF, TA= +25°C, unless otherwise noted.)
MAX1589
Low-Input-Voltage, 500mA LDO Regulator
with RREESSEETT
in SOT and TDFN
DROPOUT VOLTAGE
vs. LOAD CURRENTMAX1589 toc07
LOAD CURRENT (mA)
DROPOUT
(mV)
200500
ypical Operating Characteristics (continued)(VIN= (VOUT+ 0.5V) or 1.8V, whichever is greater; SHDN= IN, CIN= 1µF, COUT= 4.7µF, TA= +25°C, unless otherwise noted.)
MAX1589
Low-Input-Voltage, 500mA LDO Regulator
with RREESSEETT
in SOT and TDFN
SHUTDOWN RESPONSEMAX1589 toc13
100µs/div
500mV/div
1V/div
VOUT
VSHDN
ypical Operating Characteristics (continued)(VIN= (VOUT+ 0.5V) or 1.8V, whichever is greater; SHDN= IN, CIN= 1µF, COUT= 4.7µF, TA= +25°C, unless otherwise noted.)
MAX1589
Detailed DescriptionThe MAX1589 is a low-dropout, low-quiescent-current,
high-accuracy linear regulator designed primarily for
battery-powered applications. The device supplies
loads up to 500mA and is available with preset output
voltages from +0.75V to +3.0V. As illustrated in Figure 1,
the MAX1589 contains a reference, an error amplifier, a
P-channel pass transistor, an internal feedback voltage-
divider, and a power-good comparator.
The error amplifier compares the reference with the
feedback voltage and amplifies the difference. If the
feedback voltage is lower than the reference voltage,
the pass-transistor gate is pulled lower, allowing more
current to pass to the output and increasing the output
voltage. If the feedback voltage is too high, the pass-
transistor gate is pulled up, allowing less current to
pass to the output.
Internal P-Channel Pass TransistorThe MAX1589 features a 0.33Ω(RDS(ON)) P-channel
MOSFET pass transistor. Unlike similar designs using
PNP pass transistors, P-channel MOSFETs require no
base drive, which reduces quiescent current. PNP-
based regulators also waste considerable current in
dropout when the pass transistor saturates and use
high base-drive currents under large loads. The
MAX1589 does not suffer from these problems and
consumes only 90µA (typ) of quiescent current under
heavy loads, as well as in dropout.
ShutdownPull SHDNlow to enter shutdown. During shutdown, the
output is disconnected from the input, an internal 1.5kΩ
resistor pulls OUT to GND, RESETis actively pulled
low, and supply current drops below 1µA.REESSEETT
OutputThe MAX1589’s microprocessor (µP) supervisory cir-
cuitry asserts a guaranteed logic-low reset during
power-up, power-down, and brownout conditions down
to +1V. RESETasserts when VOUTis below the reset
threshold and remains asserted for at least 70ms (tRP)
after VOUTrises above the reset threshold.
Current LimitThe MAX1589 monitors and controls the pass transis-
tor’s gate voltage, limiting the output current to 850mA
(typ). If the output current exceeds ILIM, the MAX1589
output voltage drops.
Thermal-Overload ProtectionThermal-overload protection limits total power dissipa-
tion in the MAX1589. When the junction temperature
exceeds +165°C, a thermal sensor turns off the pass
Low-Input-Voltage, 500mA LDO Regulator
with RREESSEETT
in SOT and TDFN
