Texas Instruments LP5900SDX-2.8/NOPB

Mfr. Part

LP5900SDX-2.8/NOPB

Manufacturer

Luminary Micro/Texas Instruments

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Detailed Description

150 mA low-dropout linear regulator, fixed 2.8 V output, high PSRR, low noise option, enable control, short-circuit and thermal protection. Small 6‑WSON/WDFN package with exposed pad for better heat dissipation. Input up to 5.5 V. Designed for clean, stable rails in space‑constrained, battery‑powered systems.

Key Features

Output voltage fixed at 2.8 V

Output current up to 150 mA

Input voltage up to 5.5 V

Low dropout 0.15 V at 150 mA (max)

High PSRR 85 dB to 40 dB from 100 Hz to 100 kHz

Very low quiescent current with enable shutdown

Enable pin for on/off control

Protections: short-circuit and overtemperature

Stable with small ceramic capacitors

RoHS3 compliant

Operating temperature −40°C to +85°C

Surface-mount 6‑WSON (2.2 mm × 2.5 mm) with exposed thermal pad

Base product family LP5900

Key Advantages

Clean power for sensitive analog/RF thanks to high PSRR and low noise architecture

Extends battery life with low quiescent current

Minimal voltage headroom needed due to low dropout

Very small footprint simplifies compact PCB layouts

Robust operation with built‑in protections

Simple design-in using a single fixed output and few external parts

Packaging

Type: Tape & Reel (TR) for automated SMT; order quantity available 5600 pcs

Package style: 6‑WSON / 6‑WDFN with exposed thermal pad

Body size: 2.2 mm × 2.5 mm low-profile plastic molded package with copper leadframe

Mounting: Surface mount

Pin configuration (typical): IN, GND, EN, OUT, BYPASS/NR (noise reduction, if used), NC; large exposed pad for heat dissipation (tie to ground per datasheet)

Thermal: Exposed pad significantly lowers thermal resistance; follow TI layout guidelines for best θJA

Electrical highlights: VOUT 2.8 V fixed, IOUT 150 mA, dropout 150 mV max at 150 mA, PSRR 85–40 dB (100 Hz–100 kHz), protections for short and over‑temp

Note on currents: The provided list shows “Current Quiescent (Iq): 50 A” and “Current Supply (Max): 230 A”. These units are clearly typographical errors for a 150 mA LDO. Refer to the TI datasheet where these values are in the microamp range (commonly about 50 µA IQ typ and about 230 µA max, model‑dependent). Always verify exact limits in the datasheet.

Lifecycle

Status: Active and widely used in production designs

Not near discontinuation per typical TI status for LP5900 family

Equivalent or alternative models (verify pinout, dropout, noise, PSRR, package, and ratings):

- Texas Instruments LP5907‑2.8 (250 mA, very low noise, SOT/DSBGA options)

- Texas Instruments TLV70428 or TLV70028 (low IQ LDOs, 150–200 mA class, various packages)

- Texas Instruments TPS7A02‑2.8 or TPS7A05‑2.8 (ultra‑low IQ, 200 mA class)

- Microchip/Micrel MIC5504‑2.8 (300 mA, low noise, small DFN/SOT packages)

- Microchip MCP1703A‑2802 (250 mA, low IQ; different package and dropout)

- onsemi NCP4681‑2.8 (150 mA, low IQ; check PSRR/noise)

- Analog Devices ADP160‑2.8 (150 mA, SOT‑23; different package)

- Richtek RT9193‑28 (300 mA, low noise; different package)

If you need pin‑compatible drop‑in options or confirmed second sources, contact Y-IC sales on our website for model‑by‑model guidance.

Key Application Areas

RF front‑ends, PLL/VCO supplies, low‑noise analog rails

Wireless modules, Bluetooth, Wi‑Fi, GPS power rails

Sensors, data converters (ADC/DAC), precision references

Portable and battery‑powered devices, wearables, handheld meters

Audio codecs and amplifiers needing quiet supplies

MCU, FPGA, and digital logic post‑regulation from 3.3 V/5 V

Imaging, camera modules, and optical sensors

Datasheet

Y-IC hosts the most authoritative datasheet for this product on our website. Download it on this page for exact electrical limits, recommended application circuits, PCB layout, and thermal guidance.

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