General Description

The MAX8718/MAX8719 are micropower, 8-pin TDFN linear regulators that supply always-on, keep-alive power to CMOS RAM, real-time clocks (RTC), and microcontrollers in systems with high-voltage batteries. The circuits consist of a 100mA linear regulator and a power-good comparator (PGOOD) with fixed-output delay. Key features include wide input voltage range, low-dropout voltage, and low-quiescent supply current.

Features

♦ 4V to 28V Input Range

♦ 18µA Quiescent Supply Current

♦ <3µA Shutdown Supply Current

♦ 100mA Output Current

♦ 3.3V or 5V, Pin-Selectable Output (MAX8718)

♦ Adjustable 1.24V to 28V Output (MAX8719)

♦ ±2 Output Accuracy

♦ Thermal-Overload Protection

♦ Delayed Power-Good Output

♦ Thermally Enhanced 8-Pin TDFN Package

Applications

    CMOS/RTC Backup Power

    Microcontroller Power

    Notebook Computers

    Smart-Battery Packs

    PDAs and Handy-Terminals

    Battery-Powered Systems