MAX1726:12V, Ultra-Low-IQ, Low-Dropout Linear Regulators

The 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 protection, short-circuit protection, and thermal protection. The MAX1725 provides an adjustable 1.5V to 5V output using an external resistor-divider. The MAX1726 provides factory preset 1.8V, 2.5V, 3.3V, or 5V output voltages (see the Ordering Information in the full data sheet). Both devices are available in a tiny 5-pin SOT23 package.

Key Features
  • 2µA Supply Current
  • Reverse-Battery Protection
  • +2.5V to +12V Input Voltage Range
  • Fixed 1.8V, 2.5V, 3.3V, and 5V Output Voltages (MAX1726)
  • Adjustable 1.5V to 5V Output Voltages (MAX1725)
  • 20mA Guaranteed Output Current
  • 1.5% Output Voltage Accuracy
  • Small 1µF Output Capacitor
  • Short-Circuit Protection
  • Thermal Protection
  • Tiny 5-Pin SOT23 Package
MAX1725, MAX1726: Typical Operating Circuit
MAX1725, MAX1726: Typical Operating Circuit
Applications/Uses
  • Battery-Powered Alarms
  • Industrial Control Systems
  • Microcontroller Power
  • PDAs and Handy-Terminals
  • Real-Time Clock Backup Power
  • Remote Transmitters
  • Smart Battery Packs/Chargers
  • Smoke Detectors
DataSheet
titleDownload file
MAX1725-MAX1726 Data SheetMAX1725-MAX1726.pdf
Parametrics
Part NumberRegulatorsVIN
(V)
VIN
(V)
Preset VOUT
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
VDROPOUT @Rated ILOAD
(V)
Rated ILOAD
(mA)
Rated ILOAD
(mA)
ICC
(µA)
Output Voltage Noise
(µV RMS)
Ref. BypassLow Batt./ Pwr. Fail OutWatchdogReverse Batt. Protect.Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtypmaxtypSee Notes
MAX172512.512-1.550.320204.5350NoNoNoYes-40 to +85SOT/5$0.82 @1k
MAX17261.8
2.5
3.3
5
--SOT/5
Quality and Environmental Data
Related Products
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  • MAX8877:Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
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Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1726EUK18+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1726EUK18-TNo Longer AvailableMAX1726EUK18+TSOT,;5 pin;9 mm²-40°C to +85°CNo
MAX1726EUK25+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1726EUK25-TNo Longer AvailableMAX1726EUK25+TSOT,;5 pin;9 mm²-40°C to +85°CNo
MAX1726EUK25/V+TNo Longer AvailableMAX1726EUK25+TSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1726EUK33+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1726EUK33-TNo Longer AvailableMAX1726EUK33+TSOT,;5 pin;9 mm²-40°C to +85°CNo
MAX1726EUK50+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1726EUK50+TG48ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX1726EUK50-TNo Longer AvailableMAX1726EUK50+TSOT,;5 pin;9 mm²-40°C to +85°CNo
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