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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

Product Details

Key Features

Applications/Uses

Parametric specs for Linear Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 1.25
Adj. VOUT (V) (max) 5
Rated ILOAD (mA) 1000
Preset VOUT (V) 2.5
3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.21
ICC (µA) (max) 200
Output Voltage Noise (µV RMS) (typ) 115
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-6%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
Package/Pins TSSOP/16
Budgetary
Price (See Notes)
1.58
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Simplified Block Diagram

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Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 1.25
Adj. VOUT (V) (max) 5
Rated ILOAD (mA) 1000
Preset VOUT (V) 2.5
3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.21
ICC (µA) (max) 200
Output Voltage Noise (µV RMS) (typ) 115
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-6%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
Package/Pins TSSOP/16
Budgetary
Price (See Notes)
1.58

Key Features

  • 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)

Applications/Uses

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

Description

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 the Ordering Information in the full data sheet) 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.

Simplified Block Diagram

MAX1793: Typical Operating Circuit MAX1793: Typical Operating Circuit Zoom icon

Technical Docs

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 .