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45V, 400mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay

400mA, 45V Input, Low-Quiescent-Current Linear Regulators in High-Power TQFN Packages

Product Details

The MAX5087 high-voltage linear regulator operates from an input voltage of 6.5V to 45V and delivers up to 400mA of output current. The device consumes only 70µA of quiescent current with no load and 11µA in shutdown. The device includes a SET input, that when connected to ground, selects a preset output voltage of 3.3V (MAX5087A) or 5.0V (MAX5087B). Alternatively, the output voltage can be adjusted from 2.5V to 11V by simply connecting SET to the regulator's output through a resistive divider network. The MAX5087 also provides an open-drain, active-low microprocessor (µP) reset output that asserts when the regulator output drops below the preset output voltage threshold. An external capacitor programs the reset timeout period. Other features include an enable input, thermal shutdown, and short-circuit protection.

The MAX5087 operates over the automotive temperature range of -40°C to +125°C and is available in a 16-pin TQFN thermally enhanced package.

Key Features

  • Wide Operating Input Voltage Range (6.5V to 45V)
  • Thermally Enhanced Package Dissipates
    • 2.6W at TA = +70°C (16-Pin TQFN)
  • Guaranteed 400mA Output Current
  • 70µA Quiescent Supply Current
  • Preset 3.3V, 5.0V, or Adjustable 2.5V to 11V Output Voltage
  • Remote Load Sense Capability
  • Enable Input
  • Integrated µP Reset Circuit with Programmable Timeout Period
  • Thermal and Short-Circuit Protection
  • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Home Security/Safety
  • Industrial
  • Networking
Parametric specs for Linear Regulators
VIN (V) (min) 6.5
VIN (V) (max) 45
Adj. VOUT (V) (min) 2.5
Adj. VOUT (V) (max) 11
Rated ILOAD (mA) 400
Preset VOUT (V) 3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.9
ICC (µA) (max) 150
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-8%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +125
Package/Pins SOIC(N)/8
Budgetary
Price (See Notes)
$1.42 @1k
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Simplified Block Diagram

MAX5087: Functional Diagram MAX5087: Functional Diagram Zoom icon

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Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 6.5
VIN (V) (max) 45
Adj. VOUT (V) (min) 2.5
Adj. VOUT (V) (max) 11
Rated ILOAD (mA) 400
Preset VOUT (V) 3.3
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.9
ICC (µA) (max) 150
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-8%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +125
Package/Pins SOIC(N)/8
Budgetary
Price (See Notes)
$1.42 @1k

Key Features

  • Wide Operating Input Voltage Range (6.5V to 45V)
  • Thermally Enhanced Package Dissipates
    • 2.6W at TA = +70°C (16-Pin TQFN)
  • Guaranteed 400mA Output Current
  • 70µA Quiescent Supply Current
  • Preset 3.3V, 5.0V, or Adjustable 2.5V to 11V Output Voltage
  • Remote Load Sense Capability
  • Enable Input
  • Integrated µP Reset Circuit with Programmable Timeout Period
  • Thermal and Short-Circuit Protection
  • -40°C to +125°C Operating Temperature Range

Applications/Uses

  • Home Security/Safety
  • Industrial
  • Networking

Description

The MAX5087 high-voltage linear regulator operates from an input voltage of 6.5V to 45V and delivers up to 400mA of output current. The device consumes only 70µA of quiescent current with no load and 11µA in shutdown. The device includes a SET input, that when connected to ground, selects a preset output voltage of 3.3V (MAX5087A) or 5.0V (MAX5087B). Alternatively, the output voltage can be adjusted from 2.5V to 11V by simply connecting SET to the regulator's output through a resistive divider network. The MAX5087 also provides an open-drain, active-low microprocessor (µP) reset output that asserts when the regulator output drops below the preset output voltage threshold. An external capacitor programs the reset timeout period. Other features include an enable input, thermal shutdown, and short-circuit protection.

The MAX5087 operates over the automotive temperature range of -40°C to +125°C and is available in a 16-pin TQFN thermally enhanced package.

Simplified Block Diagram

MAX5087: Functional Diagram MAX5087: Functional Diagram 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