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Product details

Parameters

Output options Adjustable Output, Fixed Output Iout (Max) (A) 1.5 Vin (Max) (V) 29 Vin (Min) (V) 2.6 Vout (Max) (V) 27.5 Vout (Min) (V) 1.25 Fixed output options (V) 1.8, 2.5, 3.3, 5 Noise (uVrms) 38 Iq (Typ) (mA) 2 Thermal resistance θJA (°C/W) 23 Approx. price (US$) 0.63 | 1ku Load capacitance (Min) (µF) 10 Rating Catalog Regulated outputs (#) 1 Features Accuracy (%) 2 PSRR @ 100 KHz (dB) 30 Dropout voltage (Vdo) (Typ) (mV) 1300 Operating temperature range (C) -40 to 125, 0 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

TO-220 (NDE) 3 47 mm² 10.16 x 4.58 TO-263 (KTT) 3 155 mm² 10.16 x 15.24 WSON (NGN) 8 16 mm² 4 x 4 open-in-new Find other Linear regulators (LDO)

Features

  • Available in Fixed 1.8-V, 2.5-V, 3.3-V, 5-V
  • Available in Adjustable Version
  • Current Limiting and Thermal Protection
  • 2% Output Accuracy
  • Output Current 1.5 A
  • Line Regulation 0.015% (Typical)
  • Load Regulation 0.1% (Typical)
  • Maximum Input Voltage up to 29V
  • Minimum Adjustable Output Voltage Down to 1.25V
  • Stable with Ceramic Output Capacitor with ESR
  • Temperature Range : -40°C to 125°C

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Description

The LM1086 is a regulator with a maximum dropout of 1.5 V at 1.5 A of load current. The device has the same pin-out as TI’s industry standard LM317.

Two resistors are required to set the output voltage of the adjustable output voltage version of the LM1086. Fixed output voltage versions integrate the adjust resistors. Typically, no input capacitor is needed unless the device is situated more than 6 inches from the input filter capacitors. Output capacitor can be replaced with ceramic and appropriate ESR.

The LM1086 circuit includes a zener trimmed bandgap reference, current limiting, and thermal shutdown. Because the LM1086 regulator is floating and detects only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input-to-output differential is not exceeded. Exceeding the maximum input-to-output deferential will result in short-circuiting the output. By connecting a fixed resistor between the adjustment pin and output, the LM1086 can be also used as a precision current regulator.

For applications requiring greater output current, refer to LM1084 (clickable link) for the 5-A version, and the LM1085 (clickable link) for the 3-A version.

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Technical documentation

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Type Title Date
* Datasheet LM1086 1.5-A Low Dropout Positive Voltage Regulators datasheet (Rev. J) Apr. 23, 2015
Application notes A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Application notes LDO PSRR Measurement Simplified (Rev. A) Aug. 09, 2017
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application notes Linear power for automated industrial systems Jan. 09, 2015
Application notes AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) May 06, 2013
Application notes AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) May 06, 2013
Application notes Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) May 05, 2013
More literature Die D/S LM1086-ADJ MDC 1.5A Low Dropout Positive Regulators Sep. 12, 2012
Application notes Packaging Limits Range of Linear Regulators May 08, 2010
Application notes Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) Jun. 04, 2008
Application notes Understanding the Terms and Definitions of LDO Voltage Regulators Oct. 21, 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
$299.00
Description
The TPA6304-Q1 evaluation module showcases the industry's smallest 2.1-MHz 4-channel Analog Input Class-D Audio solution for Automotive Infotainment applications. TPA6304-Q1’s 2.1-MHz switching frequency allows customers to significantly reduce inductor size and cost and optimize total system (...)
Features
  • 2.1-Mhz switching frequency
  • 4-channel Analog input Class-D automotive audio amplifier
  • 27-W/Ch at 10% THD+N into 4-Ω with a 14.4-V supply
  • 45-W/Ch at 10% THD+N into 2-Ω with a 14.4-V supply
  • I2C diagnostics and protection
EVALUATION BOARDS Download
$249.00
Description

The TPA6404Q1EVM evaluation module (EVM) demonstrates the TPA6404-Q1 integrated circuit from Texas Instruments. The TPA6404-Q1 device is a four-channel analog-input Class-D audio amplifier that implements a 2.1 MHz PWM switching frequency that enables a cost optimized solution in a very small PCB (...)

Features
  • 4.5 V to 18 V input supply voltage support
  • Simple PPC3 GUI driven interface to support evaluation and diagnostics
  • Intelligent load diagnostics, including advanced AC diagnostic for Tweeter detection with impedance and phase response
  • 4 BTL output channels and 4 differential inputs 
  • Double-sided (...)

Design tools & simulation

SIMULATION MODELS Download
SNVMB32.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB33.ZIP (72 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB34.ZIP (72 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB35.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB36.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB37.ZIP (72 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB38.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB39.ZIP (72 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB40.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SNVMB41.ZIP (72 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 3 View options
TO-220 (NDE) 3 View options
WSON (NGN) 8 View options

Ordering & quality

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