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MAX1793
Low-Dropout, Low-IQ, 1A Linear Regulator

1A LDO Has Only 210mV Dropout Voltage, Fits in 1.7W Package, Which Is 30% Smaller Than SOT23


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 464kB)
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The MAX1793 low-dropout linear regulator (LDO) operates from +2.5V to +5.5V and delivers a guaranteed 1A load current with a low 210mV dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see Ordering Information) or can be adjusted from 1.25V to 5.0V with an external resistor-divider.

An internal PMOS pass transistor allows a low 125µA supply current, making the MAX1793 ideal for battery-operated portable equipment. Other features include a built-in reset output, low-power shutdown, and short-circuit and thermal overload protection. The MAX1793 is available in a 1.5W, 16-pin power TSSOP package, which is 30% smaller than a SOT223 package and only 1.1mm high.

Key Features   Applications/Uses
  • Guaranteed 1A Output Current
  • Low 210mV Dropout at 1A
  • Up to ±1% Output Voltage Accuracy
    • Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V or 5.0V
    • Adjustable from 1.25V to 5.0V
  • Reset Output (4ms delay)
  • Low 125µA Ground Current
  • 0.1µA Shutdown
  • Low 115µVRMS Output Noise
  • Thermal Overload Protection
  • Output Current Limit
  • Tiny TSSOP Power Package (1.5W)
  • 30% Smaller than SOT223 (only 1.1mm high)

 
  • Docking Stations
  • Notebook Computers
  • PDAs
  • USB Hubs
  • Wireless Base Stations

    Key Specifications:  Linear Regulators
    Part Number Regulators VIN
    (V)
    VIN
    (V)
    Preset VOUT
    (V)
    Adj. VOUT
    (V)
    Adj. VOUT
    (V)
    VDROPOUT @Rated ILOAD
    (V)
    Rated ILOAD
    (mA)
    ICC
    (µA)
    Low Batt./ Pwr. Fail Out POK/Reset Thresh.
    (V)
    Watchdog Reverse Batt. Protect. Package/Pins Smallest Available Pckg.
    (mm2)
    Oper. Temp.
    (°C)
    Price
    min max min max typ max nom max w/pins See Notes
    MAX1793  1 2.5 5.5
    2.5
    3.3
    1.25 5 0.21 1000 200 No Vout-6% No No
    TSSOP-EP/16
    33 -40 to +85 $1.50 @1k
    See All Linear Regulators (153)

    Diagram
    MAX1793: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-1654; Rev 1; 2000-12-18
    This page last modified: 2008-12-12


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