Texas Instruments LP3871EMP-1.8/NOPB

Mfr. Part

LP3871EMP-1.8/NOPB

Manufacturer

Luminary Micro / Texas Instruments

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Detailed Description

Low-dropout linear regulator, fixed 1.8V output, up to 800 mA load current. High PSRR, low noise, and robust protections. Surface-mount SOT-223-5 package. Suitable for clean 1.8V rail generation from inputs up to 7V.

Base product family: LP3871

RoHS: ROHS3 Compliant

Quantity available: 2677

Key Features

Output voltage: 1.8V fixed

Output current: up to 800 mA

Low dropout: 0.35V max at 800 mA

PSRR: 73 dB to 57 dB at 120 Hz

Enable pin for on/off control

Protections: over-current, over-temperature, short-circuit

Positive regulator, single channel

Quiescent current: ~5 mA typ, supply current max: 15 mA

Wide operating temperature: -40°C to +125°C

Surface-mount, SOT-223-5 footprint

Supplier device package: SOT-223-5

Mounting type: Surface Mount

Key Advantages

Clean, stable 1.8V rail for sensitive digital and RF loads

Low dropout reduces heat and extends battery life

High PSRR helps reject supply ripple and line noise

Integrated protections improve reliability in demanding environments

Simple enable control supports power sequencing and low-power modes

Compact SOT-223-5 package with good PCB heat spreading via tab

Packaging

Shipment format: Tape & Reel (TR) for automated assembly

Package / Case: SOT-223-5 (JEDEC TO-261-5 / TO-261AB)

Type: Surface-mount LDO regulator

Material: Molded epoxy package with copper leadframe and thermal tab

Size: Standard SOT-223 outline; see datasheet mechanical drawing for exact dimensions and land pattern

Pin configuration (typical): VIN, VOUT, GND, EN (Enable), BYPASS/Noise-Reduction

Thermal characteristics: Thermal shutdown built in; heat dissipation aided by the large SOT-223 tab and copper area on PCB; actual RθJA depends on board copper and airflow

Electrical properties summary: 1.8V fixed output, 800 mA max load, 0.35V max dropout at full load, PSRR 73–57 dB at 120 Hz, quiescent current ~5 mA, input voltage up to 7V

Lifecycle

Status can vary by date code and region. For the latest lifecycle and stock status, please contact Y-IC sales.

Equivalent or alternative models to consider (verify pinout, dropout, noise, and package compatibility):

- Texas Instruments LM1117-1.8 (800 mA, higher dropout, SOT-223)

- Texas Instruments TLV1117-18 (800 mA class, SOT-223)

- Texas Instruments TPS79618 (1 A, low-noise LDO)

- ON Semiconductor NCP1117ST18T3G (1.8V, 1 A, SOT-223)

- STMicroelectronics LD1117-1.8 (800 mA, SOT-223/TO-220 variants)

- Analog Devices ADP3338-1.8 (1 A, low dropout)

- Microchip MCP1825S-1802 (1 A, low dropout)

If you need pin-for-pin or performance-optimized replacements, visit our website or contact our sales team for tailored recommendations.

Key Application Areas

Core 1.8V rails for MCUs, DSPs, FPGAs, and ASICs

High-speed memory and I/O subsystems requiring clean 1.8V

RF and analog front-ends needing low-noise supply

Industrial control, instrumentation, and test equipment

Networking and telecom modules

Portable and battery-powered devices where low dropout reduces power loss

Datasheet

Y-IC hosts the most authoritative datasheet for LP3871EMP-1.8/NOPB on our product page. We recommend downloading it now to get complete electrical specs, pin details, layout guidelines, and thermal data.

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