Texas Instruments LP3985ITL-3.1/NOPB

Mfr. Part

LP3985ITL-3.1/NOPB

Manufacturer

Luminary Micro / Texas Instruments

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Detailed Description

Single-channel low-dropout linear regulator

Fixed 3.1 V output, positive regulation

Up to 150 mA continuous output current

Wide input voltage up to 6 V

Very low dropout, 0.1 V at 150 mA

Good PSRR, about 50 dB at 1 kHz and 40 dB at 10 kHz

Enable control pin for easy on/off

Built-in protection against overcurrent, overtemperature, and short circuit

Industrial temperature range, -40°C to +125°C

Ultra-compact 5-ball DSBGA package, 1.41 x 1.08 mm footprint

RoHS3 compliant

Surface-mount, tape-and-reel supply

In stock quantity reference, 2855 units available at time of listing (subject to prior sale)

Key Features

Output voltage fixed at 3.1 V

Output current 150 mA

Input voltage up to 6 V

Maximum dropout 100 mV at full load

Enable pin for low-power standby and sequencing

PSRR 50 dB to 40 dB from 1 kHz to 10 kHz

Protections included, OCP, OTP, short circuit

Single regulator channel

Surface mount, wafer-level DSBGA 5

RoHS3 compliant

Key Advantages

Tiny footprint saves PCB area and enables ultra-compact designs

Low dropout cuts power loss and heat at high load currents

Integrated protections improve system safety and reliability

Good low-frequency PSRR helps clean up supply noise for sensitive IC rails

Simple fixed-output design reduces external components and design time

Enable control supports power sequencing and low standby power

Packaging

Type, wafer-level DSBGA, 5-ball array (5-DSBGA, also referred to as 5-WFBGA or 5-DSBGA 1.41 x 1.08)

Material, silicon die with polymer passivation and lead-free solder balls; RoHS3 compliant

Size, approximately 1.41 mm x 1.08 mm, ultra-thin profile for mobile designs

Pin configuration, 5-ball grid supporting VIN, VOUT, GND, EN, and one auxiliary or no-connect depending on variant; refer to the datasheet for the exact ball map

Mounting, surface-mount reflow; shipped in Tape & Reel (TR) for automated placement

Thermal characteristics, heat is removed through PCB copper; use generous copper on VIN, VOUT, and GND for best thermal performance; actual thermal resistance depends on board layout

Electrical properties summary, input up to 6 V, fixed 3.1 V output, 150 mA output current, dropout 0.1 V at 150 mA, PSRR 50 dB to 40 dB (1 kHz to 10 kHz), enable control, integrated protections

ESD and moisture handling, standard ESD precautions required; dry-pack and MSL handling per JEDEC guidance as indicated on product labeling and datasheet

Lifecycle

Status, active product family and not near discontinuation as of the most recent public information

Direct footprint and pin-to-pin equivalents in the exact same 5-DSBGA are limited; always confirm package, pinout, and electrical specs before substitution

Potential alternatives by Texas Instruments depending on requirements

- TLV70031 series, 200 mA, fixed 3.1 V option, SOT-23-5 and small DFN packages, higher PSRR options available in related families

- TLV70431 series, 150 mA, fixed 3.1 V option, low Iq, small SOT/DFN packages

- TPS70931 series, 150 mA, high input voltage capability, fixed 3.1 V option, SOT-23

- LP5907 series, up to 250 mA, very low noise, multiple fixed voltages, tiny packages (check availability of 3.1 V)

- TPS7A02 / TPS7A05 families, very low Iq modern LDOs, multiple fixed voltages (commonly 3.0 V or 3.3 V; verify 3.1 V availability)

Potential alternatives by other vendors (functional alternatives, not pin-compatible)

- Analog Devices ADP160-3.1, 150 mA, fixed 3.1 V, small SOT/TSOT packages

- onsemi NCP4681-3.1, 150 mA class, fixed 3.1 V, low Iq, SC-70/DFN packages

- Microchip MCP1703A family, 250 mA, low quiescent current, fixed voltages near 3.1 V (often 3.0 V or 3.3 V, verify 3.1 V option)

- Torex XC6206 or XC6215 series, 150–200 mA, fixed voltages including 3.1 V variants in SOT-23

If you need a pin-to-pin DSBGA match or a special 3.1 V option, contact our sales team on the Y-IC website for the latest cross-reference and availability

Key Application Areas

Battery-powered and portable electronics

Wearables, trackers, medical portables, and sensor nodes

Wireless modules, BLE, Zigbee, Wi-Fi power rails

Low-noise rails for MCUs, DSPs, codecs, and mixed-signal ICs

Cameras, imaging modules, and small embedded systems

General-purpose 3.1 V point-of-load regulation over industrial temperatures

Datasheet

Y-IC hosts the most authoritative datasheet for this product model on our website. For accurate pin maps, electrical tables, and layout guidelines, download the datasheet from this page now for your design work.

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