MAX1818

PRODUCTION

500mA, Low-Dropout Linear Regulator in SOT23

Data Sheet (Rev. 3) Product Selection Table
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Overview

  • Guaranteed 500mA Output Current
  • Low 120mV Dropout at 500mA
  • ±1% Output Voltage Accuracy
    • Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V, 5V
    • Adjustable from 1.25V to 5.0V
  • Power OK Output
  • Low 125µA Ground Current
  • 0.1µA Shutdown Current
  • Thermal Overload Protection
  • Output Current Limit
  • Tiny 800mW 6-Pin SOT23 Package

The MAX1818 low-dropout linear regulator operates from a +2.5V to +5.5V supply and delivers a guaranteed 500mA load current with low 120mV dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see Selector Guide in the full data sheet) or can be adjusted from 1.25V to 5.0V with an external resistive divider.

An internal PMOS pass transistor allows the low 125µA supply current to remain independent of load, making this device ideal for portable battery-operated equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, base stations, and notebook computers.

Other features include an active-low open-drain reset output that indicates when the output is out of regulation, a 0.1µA shutdown, short-circuit protection, and thermal shutdown protection. The device is available in a miniature 800mW 6-pin SOT23 package.

Applications

  • Cell Phones/Cordless Phones
  • Docking Stations
  • Notebook Computers
  • Palmtop Computers
  • PDAs and Other Handheld Devices
  • USB Hubs
  • Wireless Base Stations
MAX1818
500mA, Low-Dropout Linear Regulator in SOT23
MAX1818: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 1

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Evaluation Kits

MAX1818EVKIT

Evaluation Kit for the MAX1818EUT15, MAX1818EUT18, MAX1818EUT20, MAX1818EUT25, MAX1818EUT33, MAX1818EUT50

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Features and Benefits

  • +2.5V to +5.5V Input Voltage Range
  • Up to 500mA Output Current
  • Output Voltage
    • +1.8V Fixed Output Voltage (MAX1818EUT18)
    • +1.25 to +5.0V Adjustable Output Voltage (External Divider)
  • Power-OK Output
  • 6-Pin SOT23 Package
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX1818 linear regulator evaluation kit (EV kit) provides a regulated +1.8V output voltage from a +2.5V to +5.5V input source. It delivers up to 500mA output current.

The EV kit is a fully assembled and tested surface-mount PC board. It can also evaluate other preset voltages and other output voltages in the +1.25V to +5.0V range by using external resistors.
MAX1818EVKIT
Evaluation Kit for the MAX1818EUT15, MAX1818EUT18, MAX1818EUT20, MAX1818EUT25, MAX1818EUT33, MAX1818EUT50

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