Texas Instruments LP3985ITLX-3.1/NOPB

Mfr. Part

LP3985ITLX-3.1/NOPB

Manufacturer

Luminary Micro / Texas Instruments

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Detailed Description

Low-dropout linear voltage regulator, fixed 3.1 V output, up to 150 mA load, single-channel, positive regulator with enable control. Ultra-compact 5-ball DSBGA package (1.41 mm x 1.08 mm) for space-constrained designs. Wide input up to 6 V, strong PSRR (about 50 dB at 1 kHz and 40 dB at 10 kHz). Built-in protection: over-current, thermal shutdown, and short-circuit. Industrial temperature range -40°C to +125°C. RoHS3 compliant and lead-free (NOPB).

Key Features

Output voltage: fixed 3.1 V

Output current: up to 150 mA

Max input voltage: 6 V

Dropout voltage: 0.1 V at 150 mA (typical max)

PSRR: ~50 dB at 1 kHz, ~40 dB at 10 kHz

Regulator channels: 1

Output type: fixed, positive

Control: enable pin for on/off

Protections: over current, over temperature, short circuit

Operating temperature: -40°C to +125°C

Mounting: surface mount (SMD)

Package: 5-DSBGA, ultra-small 1.41 x 1.08 mm

Compliance: RoHS3, lead-free (NOPB)

Base family: LP3985

Key Advantages

Very small footprint saves PCB space in wearables and compact IoT modules

Low dropout supports longer battery life and stable output near battery end-of-life

Solid PSRR improves rail cleanliness for RF, audio, and precision sensors

Robust built-in protections reduce failure risk and simplify design safety

Simple enable control for power sequencing and low-power modes

Wide input range provides flexibility across battery and adapter sources

Industrial temperature range ensures reliability in harsh environments

Packaging

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

Package/case: 5-DSBGA (also noted as 5-WFBGA, DSBGA)

Dimensions: 1.41 mm x 1.08 mm body

Ball/pin configuration: 5-ball array; refer to datasheet for exact ball map and pin functions

Materials: wafer-level DSBGA, lead-free solder balls (NOPB), RoHS3 compliant

Mounting type: surface mount

Thermal characteristics: heat is conducted through balls into PCB copper; actual thermal resistance and allowable power dissipation depend on board layout and ambient; see datasheet for guidance

Electrical properties summary: fixed 3.1 V output; 150 mA max load; 0.1 V dropout at 150 mA; good PSRR

Moisture sensitivity/storage: follow JEDEC handling; check datasheet and product labels for MSL details

Lifecycle

Current status: Generally available in TI’s portfolio. Not known to be near discontinuation based on public information. For the latest status, contact Y-IC.

Family options: Other fixed-output variants exist within the LP3985 family (different voltages in the same package). Base product number: LP3985.

Potential alternatives (verify pinout, package, and specs before use; not drop-in):

- Texas Instruments TPS7A02-3.1, TPS7A05-3.1, TLV700-3.1, LP5907-3.1, TPS727 series

- Microchip MIC5504-3.1

- onsemi NCP114-3.1 / NCP117-3.1

- Analog Devices ADP160-3.1

If you need exact drop-in or fully equivalent models, please contact our sales team via the Y-IC website for tailored recommendations.

Key Application Areas

Wearables and ultra-compact IoT nodes with tight space budgets

Battery-powered devices needing low dropout and efficient standby

RF modules, wireless sensors, and audio circuits requiring cleaner rails

Microcontroller, DSP, and FPGA auxiliary rails around the 3 V range

Cameras, image sensors, and precision analog front ends

Portable medical and industrial handheld instruments

General-purpose post-regulation after DC/DC converters for noise reduction

Datasheet

Y-IC hosts the most authoritative datasheet for LP3985ITLX-3.1/NOPB on our product page. We recommend downloading it now for ball map, layout guidelines, thermal data, and detailed electrical characteristics.

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