150mA, Low-Dropout Linear Regulator with Power OK Output

The MAX8875 low-dropout linear regulator operates from a +2.5V to +6.5V input range and delivers up to 150mA. A P-channel MOSFET pass transistor allows its 85µA supply current to remain independent of the load, making this device ideal for battery-operated portable equipment such as PCS phones, cellular phones, cordless phones, and modems.

The MAX8875 features a power-OK output that indicates when the output is out of regulation. The device is available in several preset output voltage versions: 5.0V, 3.3V, 3.0V, 2.7V, 2.5V, or 1.5V. Other features include 1µA (max) shutdown current, short-circuit protection, thermal shutdown protection, and reverse-battery protection. The device comes in a miniature 5-pin SOT23 package.

The MAX8875 is optimized for use with a 1µF ceramic output capacitor. For a pin-compatible, functionally equivalent device for use with a higher ESR output capacitor, see the MAX8885 data sheet.

Applications

* Audio Systems * Cordless Phones * Electronic Planners * Handheld Instruments (PDAs, Palmtops) * Modems * Palmtop Computers * PCMCIA Cards * PCS Telephones

* Power-OK Output

* Small Output Capacitor (1µF ceramic)

* Preset Output Voltages (±1% accuracy)

* Guaranteed 150mA Output Current

* 85µA No-Load Supply Current

* Low 110mV Dropout at 100mA Load (165mV at 150mA load)

* Thermal-Overload and Short-Circuit Protection

* Reverse-Battery Protection

* 60dB PSRR at 100Hz

* 1µA max Shutdown Current