Top

500mA, Low-Voltage Linear Regulator in µMAX

Low Input and Output Voltage Linear Regulator Delivers Up to 500mA in a Tiny Power µMAX Package

Product Details

The MAX1806 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%) output voltage is preset at an internally trimmed voltage (see Selector Guide) 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 MAX1806 comes in a miniature 1.3W, 8-pin power-µMAX® package with a metal pad on the underside of the package.

Key Features

  • Guaranteed 500mA Output Current
  • Output Down to 0.8V
  • Low 175mV Dropout at 500mA
  • ±1% Output Voltage Accuracy
    • Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V
    • 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 1.3W, 8-Pin Power-µMAX Package

Applications/Uses

  • Cell Phones/Cordless Phones
  • Docking Stations
  • Notebook Computers
  • Palmtop Computers
  • PDAs
  • USB Hubs
  • Wireless Base Stations
Parametric specs for Linear Regulators
VIN (V) (min) 2.25
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 0.8
Adj. VOUT (V) (max) 4.5
Rated ILOAD (mA) 500
Preset VOUT (V) 0.8
1.5
1.8
2.5
3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.17
ICC (µA) (max) 400
Output Voltage Noise (µV RMS) (typ) 300
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-7%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
$1.58 @1k
View More

Simplified Block Diagram

MAX1806: Typical Operating Circuit MAX1806: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

/en/design/design-tools/ee-sim.html?

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

Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 2.25
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 0.8
Adj. VOUT (V) (max) 4.5
Rated ILOAD (mA) 500
Preset VOUT (V) 0.8
1.5
1.8
2.5
3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.17
ICC (µA) (max) 400
Output Voltage Noise (µV RMS) (typ) 300
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-7%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
$1.58 @1k

Key Features

  • Guaranteed 500mA Output Current
  • Output Down to 0.8V
  • Low 175mV Dropout at 500mA
  • ±1% Output Voltage Accuracy
    • Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V
    • 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 1.3W, 8-Pin Power-µMAX Package

Applications/Uses

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

Description

The MAX1806 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%) output voltage is preset at an internally trimmed voltage (see Selector Guide) 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 MAX1806 comes in a miniature 1.3W, 8-pin power-µMAX® package with a metal pad on the underside of the package.

Simplified Block Diagram

MAX1806: Typical Operating Circuit MAX1806: 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