MAX1726EUK18-T ,12V / Ultra-Low IQ / Low-Dropout Linear RegulatorsApplicationsSmoke DetectorsPIN- TOPPART TEMP RANGEPACKAGE MARKRemote TransmittersMAX1725EUK-T -40°C ..
MAX1726EUK25+ ,12V, Ultra-Low-IQ, Low-Dropout Linear Regulatorsfeatures include reverse-battery protec-tion, short-circuit protection, and thermal protection.♦ Th ..
MAX1726EUK25-T ,12V / Ultra-Low IQ / Low-Dropout Linear RegulatorsELECTRICAL CHARACTERISTICS(Circuit of Figure 1, V = V + 1V, SHDN = IN, I = 1mA, T = -40°C to +85°C, ..
MAX1726EUK33+ ,12V, Ultra-Low-IQ, Low-Dropout Linear RegulatorsApplicationsMAX1725EUK+T -40°C to +85°C 5 SOT23 ADNKMAX1726EUK18+T -40°C to +85°C 5 SOT23 ADNLSmoke ..
MAX1726EUK33+T ,12V, Ultra-Low-IQ, Low-Dropout Linear RegulatorsFeaturesThe MAX1725/MAX1726 are ultra-low supply current,♦ 2µA Supply Currentlow-dropout linear reg ..
MAX1726EUK50+T ,12V, Ultra-Low-IQ, Low-Dropout Linear RegulatorsApplicationsMAX1725EUK+T -40°C to +85°C 5 SOT23 ADNKMAX1726EUK18+T -40°C to +85°C 5 SOT23 ADNLSmoke ..
MAX4558CPE ,15kV ESD-Protected / Low-Voltage / CMOS Analog Multiplexers/SwitchesApplications' Low Crosstalk: < -93dB (50Ω)Battery-Operated Equipment' High Off-Isolation: < -96dB ( ..
MAX4558CSE ,15kV ESD-Protected / Low-Voltage / CMOS Analog Multiplexers/SwitchesELECTRICAL CHARACTERISTICS—Dual ±5V Supplies(V = +4.5V to +5.5V, V = -4.5V to -5.5V, V = +2.4V, V = ..
MAX4558CSE+ ,±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers SwitchesFeaturesThe MAX4558/MAX4559/MAX4560 are low-voltage,♦ ESD-Protected X, Y, Z and X_, Y_, Z_ PinsCMOS ..
MAX4558EEE ,15kV ESD-Protected / Low-Voltage / CMOS Analog Multiplexers/SwitchesFeaturesThe MAX4558/MAX4559/MAX4560 are low-voltage,' ESD-Protected X, Y, Z and X_, Y_, Z_ PinsCMOS ..
MAX4558ESE ,15kV ESD-Protected / Low-Voltage / CMOS Analog Multiplexers/SwitchesMAX4558/MAX4559/MAX456019-1443; Rev 0; 4/99±15kV ESD-Protected, Low-Voltage, CMOSAnalog Multiplexer ..
MAX4558ESE+ ,±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers SwitchesELECTRICAL CHARACTERISTICS—Dual ±5V Supplies(V = +4.5V to +5.5V, V = -4.5V to -5.5V, V = +2.4V, V = ..
MAX1726EUK18-T-MAX1726EUK25-T
12V / Ultra-Low IQ / Low-Dropout Linear Regulators
General DescriptionThe MAX1725/MAX1726 are ultra-low supply current,
low-dropout linear regulators intended for low-power
applications that demand the longest possible battery
life. Unlike inferior PNP-based designs, the MAX1725/
MAX1726s’ PMOS pass elements maintain an ultra-low
2µA supply current throughout their entire operating
range and in dropout. Despite their ultra-low power
consumption, the MAX1725/MAX1726 have tight output
accuracy (1.5%) and require just 1µF output capacitance
to achieve good load-transient response.
These regulators have a wide input voltage range
(+2.5V to +12V), making them excellent choices for
systems powered from two lithium-ion (Li+) cells and 9V
batteries. Other features include reverse-battery protec-
tion, short-circuit protection, and thermal protection.
The MAX1725 provides an adjustable 1.5V to 5V output
using an external resistor-divider. The MAX1726 pro-
vides factory preset 1.8V, 2.5V, 3.3V, or 5V output volt-
ages (see the Ordering Information). Both devices are
available in a tiny 5-pin SOT23 package.
________________________ApplicationsSmoke Detectors
Remote Transmitters
Smart Battery Packs
Industrial Control Systems
Microcontroller Power
Real-Time Clock Backup Power
PDAs and Handy-Terminals
Battery-Powered Alarms
Features2µA Supply CurrentReverse-Battery Protection+2.5V to +12V Input Voltage RangeFixed 1.8V, 2.5V, 3.3V, and 5V Output Voltages
(MAX1726)Adjustable 1.5V to 5V Output Voltages (MAX1725)20mA Guaranteed Output Current1.5% Output Voltage AccuracySmall 1µF Output CapacitorShort-Circuit ProtectionThermal Protection Tiny 5-Pin SOT23 Package
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear Regulatorsypical Operating Circuit19-1680; Rev 1; 2/03
Ordering Information
Selector Guide
Pin Configuration appears at end of data sheet.
Note:See the Selector Guide for the MAX1725/MAX1726 output
options as they relate to the part number suffix.
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear Regulators
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VIN= VOUT+ 1V, SHDN= IN, IOUT= 1mA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at= +25°C.) (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................................................................-14V to +14V
SHDNto GND..............................................-0.3V to (VIN+ 0.3V)
(-0.3V to + 0.3V when VIN< 0V)
OUT, FB (MAX1725 only) to GND...................-0.3V to +6V when
VIN>5.7V; -0.3V to (VIN+ 0.3V) when 0V <
VIN< 5.7V; -0.3V to +0.3Vwhen VIN< 0V
OUT Continuous Current...................................................200mA
OUT Short Circuit...........................................................Indefinite
Continuous Power Dissipation (TA= +70°C)
5-Pin SOT23-5 (derate 7.1mW/°C above +70°C)........571mW
θJA...............................................................................+140°C/W
Junction Temperature......................................................+150°C
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear Regulators
SUPPLY CURRENT vs. LOAD CURRENTMAX1725/26 toc02
LOAD CURRENT (mA)
SUPPLY CURRENT (
SUPPLY CURRENT vs. TEMPERATURE
MAX1725/26 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX1725/26 toc04
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (%DEVIATION)
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX1725/26 toc05
LOAD CURRENT (mA)
OUTPUT VOLTAGE (% DEVIATION)42620
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
MAX1725/26 toc06
TEMPERATURE (°C)
NORMALIZED OUTPUT VOLTAGE (%)-0.20
Typical Operating Characteristics(VOUT= +3.3V, IOUT= 1mA, TA= +25°C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VIN= VOUT+ 1V, SHDN= IN, IOUT= 1mA, TA= -40°C to +85°C, unless otherwise noted. Typical values are at= +25°C.) (Note 1)
Note 1:Limits are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2:Guaranteed by OUT line-regulation testing.
Note 3:OUT accuracy from nominal voltage. The MAX1725 is tested at VOUT= 1.5V, 2.5V, and 5V.
Note 4:When VOUTfalls to 4% below its value at VIN= VOUT+ 1V.
Detailed DescriptionThe MAX1725/MAX1726 are low-dropout, low-quiescent-
current linear regulators designed primarily for battery-
powered applications (Figure 1). The MAX1725 provides
an adjustable output voltage from 1.5V to 5V using an
external resistor-divider. The MAX1726 supplies preset
output voltages of 1.8V, 2.5V, 3.3V, or 5V. These devices
consist of a +1.245V error amplifier, MOSFET driver,
and P-channel pass transistor (Figure 2).
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear Regulators
Typical Operating Characteristics (continued)(VOUT= +3.3V, IOUT= 1mA, TA= +25°C, unless otherwise noted.)
The error amplifier compares 1.245V to the selected
feedback voltage and amplifies the difference. If the
feedback voltage is lower than 1.245V, the pass-tran-
sistor gate is pulled lower, allowing more current to
pass, and thus increasing the output voltage. If the
feedback voltage is higher than 1.245V, the pass-tran-
sistor gate is driven higher, allowing less current to
pass to the output. The output voltage is fed back
through either an internal resistor voltage-divider con-
nected to OUT (MAX1726) or an external resistor net-
work connected to FB (MAX1725). Additional features
include an output currentlimiter, reverse-battery protec-
tion, a thermal sensor, and shutdown logic.
Internal P-Channel Pass TransistorThe MAX1725/MAX1726 feature a P-channel MOSFET
pass transistor. This provides advantages over similar
designs using PNP pass transistors, including longer
battery life. The P-channel MOSFET requires no base
drive, which reduces quiescent current considerably.
PNP-based regulators waste considerable current in
dropout when the pass transistor saturates; they also
use high base-drive currents under large loads. The
MAX1725/MAX1726 do not suffer from these prob-
lems, and consume only 2µA of quiescent current
throughout their load range (see the Typical Operating
Characteristics).
ShutdownTo enter shutdown, drive the SHDNpin below 0.5V.
When the MAX1725/MAX1726 are shut down, the output
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear RegulatorsFigure 1. Typical Application Circuit
Figure 2. Functional Diagram
MAX1725/MAX1726
12V, Ultra-Low IQ, Low-Dropout
Linear Regulators
