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MAX1935
500mA, Low-Voltage Linear Regulator in Tiny QFN


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Description
FULL DATA SHEET (PDF, 252kB)
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The MAX1935 low-dropout linear regulator operates from a 2.25V to 5.5V supply and delivers a guaranteed 500mA load current with low 175mV dropout. The high-accuracy (±1.5%) output voltage is preset at an internally trimmed voltage or can be adjusted from 0.8V to 4.5V with an external resistive-divider.

An internal PMOS pass transistor allows low 210µA supply current, making this device ideal for portable equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, and other equipment, including base stations and docking stations.

Other features include an active-low, power-OK output that indicates when the output is out of regulation, a 0.02µA shutdown mode, short-circuit protection, and thermal-shutdown protection. The MAX1935 comes in a tiny 1.9W, 8-pin 3mm x 3mm thin QFN package.

Key Features   Applications/Uses
  • Guaranteed 500mA Output Current
  • Output Down to 0.8V
  • Low 175mV Dropout at 500mA
  • ±1.5% Output Voltage Accuracy
    • Preset at 1.5V
    • Adjustable from 0.8V to 4.5V
  • Power-OK Output
  • Low 210µA Ground Current
  • 0.02µA Shutdown Current
  • Thermal-Overload Protection
  • Output Current Limit
  • Tiny 1.9W, 8-Pin 3mm x 3mm Thin QFN Package

 
  • Cell Phones/Cordless Phones
  • Docking Stations
  • Notebook Computers
  • Palmtop Computers
  • PDAs
  • USB Hubs
  • Wireless Base Stations

    Key Specifications:   Linear Regulators
    Part Number Regulators per Pkg. Min. VIN (V) Max. VIN (V) Min. Adjustable VOUT (V) Max. Adjustable VOUT (V) Typ. VDROPOUT@ Rated ILOAD (V) Rated ILOAD (mA) Max. ICC (µA) Low Battery/ Power Fail Output Nominal POK/Reset Threshold (V) Watchdog Reverse Battery Protection Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX1935  1 2.25 5.5 0.8 4.5 0.175 500 600 No Vout-7% No No TDFN-EP/8 10 -40 to +85 $1.00 @ 1k
    See All Linear Regulators (145)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX1935: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-2599; Rev 0; 2002-11-19
    This page last modified: 2007-08-01


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