MAX1725

PRODUCTION

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

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Overview

  • 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

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.

Applications

  • 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

MAX1725
12V, Ultra-Low-IQ, Low-Dropout Linear Regulators
MAX1725, MAX1726: Typical Operating Circuit
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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LDO Linear Regulators 12
MAX1615 PRODUCTION High-Voltage, Low-Power Linear Regulators for Notebook Computers
MAX1616 PRODUCTION High-Voltage, Low-Power Linear Regulators for Notebook Computers
MAX8863 PRODUCTION Low-Dropout, 120mA Linear Regulators
MAX8864 PRODUCTION Low-Dropout, 120mA Linear Regulators
MAX8873 PRODUCTION Low-Dropout 120mA Linear Regulators
MAX8874 PRODUCTION Low-Dropout 120mA Linear Regulators
MAX8867 PRODUCTION Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23
MAX8868 PRODUCTION Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23
MAX8877 PRODUCTION Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
MAX8888 PRODUCTION Low-Dropout, 300mA Linear Regulators in SOT23
MAX8880 PRODUCTION 12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8881 PRODUCTION 12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
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Reference Designs

MAXREFDES1151
MAXREFDES1151 Circuits from the lab

Supercapacitor dv/dt Suppression Circuit Using MAX406, MAX985, and MAX1725

Features and Benefits

  • +2.5V to +10V Single-Supply Range
  • 500μV Max Offset Voltage (MAX406A)
  • < 0.1pA Typical Input-Bias Current
  • Output Swings Rail-to-Rail
  • Input Voltage Range Including Negative Remote Alarm Notification (RAI)
MAXREFDES1151
Supercapacitor dv/dt Suppression Circuit Using MAX406, MAX985, and MAX1725
MAXREFDES1151

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