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

SOT23 Low-Dropout Regulators Give Longest Battery Life

Product Details

Key Features

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Simplified Block Diagram

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Sampling:
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Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 2.5
VIN (V) (max) 6.5
Rated ILOAD (mA) 150
Preset VOUT (V) 3
5
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.16
ICC (µA) (max) 180
Output Voltage Noise (µV RMS) (typ) 170
Ref. Bypass No
Low Batt./ Pwr. Fail Out Yes
POK/Reset Thresh. (V) (nom) Vout-10.5%
Watchdog No
Reverse Batt. Protect. Yes
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
0.92

Key Features

  • 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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX8875: Typical Operating Circuit MAX8875: Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.