Texas Instruments LP2989IMM-1.8/NOPB

Mfr. Part

LP2989IMM-1.8/NOPB

Manufacturer

Luminary Micro / Texas Instruments

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Detailed Description

Low-dropout linear voltage regulator delivering a fixed 1.8 V output up to 500 mA. Wide input voltage up to 16 V. High PSRR for cleaner power to sensitive circuitry. Enable control for easy power sequencing. Robust protection against over current, over temperature, and short circuit. Compact 8-VSSOP package for space-constrained designs. Industrial temperature range -40 to +125 °C. RoHS3 compliant. Tape & Reel for automated assembly.

Key Features

Fixed 1.8 V output, positive regulator

Output current up to 500 mA

Max dropout 0.65 V at 500 mA

PSRR 60 dB at 1 kHz

Enable pin for shutdown and power control

Wide input range 2.5 V to 16 V (typical use up to 16 V max)

Single regulator channel

Comprehensive protections: over current, over temperature, short circuit

Surface-mount 8-VSSOP package

Industrial temp range -40 °C to +125 °C

RoHS3 compliant

Key Advantages

Simple, reliable power rail at 1.8 V without complex external components

Stable operation and cleaner output for RF, ADC, DAC, and precision analog loads

Small footprint saves PCB area in portable and dense designs

Enable pin allows low-power standby and easy sequencing

Strong protection increases system robustness and safety

Broad input range fits many upstream supplies

Proven TI LP2989 family for long-term availability and ecosystem support

Packaging

Type: Tape & Reel (TR) for automated pick-and-place

Package case: 8-VSSOP (also referenced as 8-TSSOP / 8-MSOP by some suppliers)

Body width: about 3.00 mm (0.118 inch)

Lead pitch: about 0.65 mm (typical for VSSOP-8)

Mounting: Surface Mount

Material: Molded epoxy body with copper leadframe, lead-free matte tin plating (NOPB)

Pin configuration: 8 leads – typical LDO pins include VIN, VOUT, GND, EN (enable), BYPASS/NR (noise reduction). Fixed-voltage version uses internal feedback. Refer to datasheet for exact pin assignments.

Thermal characteristics: Integrated thermal shutdown; thermal performance depends on PCB copper area. Use wide copper pour under and around the device to reduce thermal resistance and junction temperature.

Electrical properties: Fixed 1.8 V output, up to 500 mA; dropout 0.65 V max at 500 mA; PSRR 60 dB at 1 kHz; quiescent current approximately 175 µA (typical family value); supply current up to 9 mA; input voltage up to 16 V; positive regulator; enable control

Lifecycle

Status: Generally active in TI’s portfolio for LP2989 family

Not known to be nearing discontinuation based on typical availability. For current status, confirm with our sales team.

Equivalent and alternative models

- Same family, different fixed voltages: LP2989IMM-2.5/NOPB, LP2989IMM-3.3/NOPB, LP2989IMM-5.0/NOPB

- TI alternatives with similar roles (check ratings): TPS73518 (500 mA), TPS73618 (400 mA), TPS73218 (250 mA), TLV1117-18 (800–1000 mA, higher dropout), TPS79618 (1 A, low-noise), TPS7A05-1.8 (200 mA, ultralow IQ), TPS7A02-1.8 (200 mA, ultralow IQ)

- Cross-vendor options (specs vary): Microchip MCP1826S-1802, ON Semiconductor NCP1117ST18T3G, Analog Devices ADP3338-1.8

If you need an exact drop-in or the closest match, contact our sales team via the Y-IC website for a detailed cross-reference and availability

Key Application Areas

Microcontroller and processor 1.8 V core rails

DSP, FPGA auxiliary rails

High-PSRR analog supplies for ADCs, DACs, audio codecs

RF modules, PLLs, and clocking circuits needing clean power

Sensors and precision instrumentation

Industrial control and data acquisition

Portable and battery-powered devices

Communications equipment and networking

Automotive and harsh environments requiring -40 to +125 °C operation

Datasheet

Our Y-IC website hosts the most authoritative datasheet for LP2989IMM-1.8/NOPB. Download the datasheet on this page for complete electrical characteristics, pin assignments, layout guidelines, and application notes.

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