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LM1086CS-ADJ/NOPB

TILM1086CS-ADJ/NOPB

Texas Instruments
Linear Voltage Regulator IC Positive Adjustable 1 Output 1.5A TO-263 (DDPAK-3)
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Overview

The LM1086CS-ADJ/NOPB is a low-dropout positive voltage regulator capable of providing up to 1.5A of output current. It features an adjustable output voltage starting from 1.25V and is designed to maintain high efficiency with a maximum input voltage of 29V. This device includes internal current limiting and thermal protection to ensure reliability under varying load conditions.

Why Choose This Part

The regulator offers excellent ripple rejection of 75dB at 120Hz and maintains 2% output accuracy over temperature. Its DDPAK surface-mount package provides superior thermal dissipation compared to smaller SOT-223 variants while supporting a full 1.5A load. It is also designed to be stable when using ceramic output capacitors that include sufficient ESR.

Applications

Post Regulation for Switching Supplies
Used to clean up high-frequency noise from switching regulators to provide stable, low-noise rails for sensitive analog circuitry.
Battery Chargers
Leverages adjustable output and current limiting features to manage charging cycles for various battery chemistries.
High-Efficiency Linear Regulators
Provides local on-card regulation for microprocessors and high-performance digital logic where low dropout voltage is required.
Constant Current Regulators
Can be configured with an external resistor to provide a precision constant current source for LEDs or sensors.

Key Specifications

PSRR 75dB (120Hz)
Output Type Adjustable
Mounting Type Surface Mount
Package / Case TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
Current - Output 1.5A
Protection Features Over Current, Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature 0degC ~ 125degC (TJ)
Voltage - Input (Max) 29V
Voltage Dropout (Max) 1.5V @ 1.5A
Current - Supply (Max) 10 mA
Voltage - Output (Max) 15V
Supplier Device Package TO-263 (DDPAK-3)
Current - Quiescent (Iq) 5 mA
Voltage - Output (Min/Fixed) 1.2V

Getting Started

When designing with the LM1086CS-ADJ, ensure a minimum 10uF tantalum or electrolytic capacitor is placed at the output for stability. Calculate the output voltage using two external resistors (R1 and R2) based on the 1.25V internal reference voltage. The DDPAK tab is electrically connected to the output pin, so ensure proper PCB copper pour for heat sinking.

Categories

Power Management > LDO Voltage Regulators