LP2985A

ACTIVE

150-mA 16-V low-dropout (LDO) voltage regulator with high-accuracy

A newer version of this product is available

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
TPS7A24 ACTIVE 200-mA, 18-V, ultra-low-IQ, low-dropout (LDO) voltage regulator with enable Ultra-low-IQ (2 µA)

Product details

Output options Fixed Output Iout (max) (A) 0.15 Vin (max) (V) 16 Vin (min) (V) 2.2 Vout (max) (V) 10 Vout (min) (V) 1.8 Fixed output options (V) 1.8, 2.5, 2.8, 2.9, 3, 3.3, 5, 10 Noise (µVrms) 30 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 206 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 3 PSRR at 100 KHz (dB) 40 Dropout voltage (Vdo) (typ) (mV) 280 Operating temperature range (°C) -45 to 125
Output options Fixed Output Iout (max) (A) 0.15 Vin (max) (V) 16 Vin (min) (V) 2.2 Vout (max) (V) 10 Vout (min) (V) 1.8 Fixed output options (V) 1.8, 2.5, 2.8, 2.9, 3, 3.3, 5, 10 Noise (µVrms) 30 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 206 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 3 PSRR at 100 KHz (dB) 40 Dropout voltage (Vdo) (typ) (mV) 280 Operating temperature range (°C) -45 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • V IN range (new chip): 2.5 V to 16 V
  • V OUT range (new chip):
    • 1.2 V to 5.0 V (fixed, 100-mV steps)
  • V OUT accuracy:
    • ±1% for A-grade legacy chip
    • ±1.5% for standard-grade legacy chip
    • ±0.5% for new chip only
  • ±1% output accuracy over load, and temperature for new chip
  • Output current: Up to 150 mA
  • Low I Q (new chip): 71 µA at I LOAD = 0 mA
  • Low I Q (new chip): 750 µA at I LOAD = 150 mA
  • Shutdown current:
    • 0.01 µA (typ) for legacy chip
    • 1.12 µA (typ) for new chip
  • Low noise: 30 µV RMS with 10-nF bypass capacitor
  • Output current limiting and thermal protection
  • Stable with 2.2-µF ceramic capacitors
  • High PSRR: 70 dB at 1 kHz, 40 dB at 1 MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)
  • V IN range (new chip): 2.5 V to 16 V
  • V OUT range (new chip):
    • 1.2 V to 5.0 V (fixed, 100-mV steps)
  • V OUT accuracy:
    • ±1% for A-grade legacy chip
    • ±1.5% for standard-grade legacy chip
    • ±0.5% for new chip only
  • ±1% output accuracy over load, and temperature for new chip
  • Output current: Up to 150 mA
  • Low I Q (new chip): 71 µA at I LOAD = 0 mA
  • Low I Q (new chip): 750 µA at I LOAD = 150 mA
  • Shutdown current:
    • 0.01 µA (typ) for legacy chip
    • 1.12 µA (typ) for new chip
  • Low noise: 30 µV RMS with 10-nF bypass capacitor
  • Output current limiting and thermal protection
  • Stable with 2.2-µF ceramic capacitors
  • High PSRR: 70 dB at 1 kHz, 40 dB at 1 MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)

The LP2985 is a fixed-output, wide-input, low-noise, low-dropout voltage regulator supporting an input voltage range from 2.5 V to 16 V and up to 150 mA of load current. The LP2985 supports an output range of 1.2 V to 5.0 V (for new chip).

Additionally, the LP2985 (new chip) has a 1% output accuracy across load, and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

Low output noise of 30 µV RMS (with 10-nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70 dB at 1 kHz and 40 dB at 1 MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2985 is available in a 5-pin 2.9-mm × 1.6-mm SOT-23 (DBV) package.

The LP2985 is a fixed-output, wide-input, low-noise, low-dropout voltage regulator supporting an input voltage range from 2.5 V to 16 V and up to 150 mA of load current. The LP2985 supports an output range of 1.2 V to 5.0 V (for new chip).

Additionally, the LP2985 (new chip) has a 1% output accuracy across load, and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

Low output noise of 30 µV RMS (with 10-nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70 dB at 1 kHz and 40 dB at 1 MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2985 is available in a 5-pin 2.9-mm × 1.6-mm SOT-23 (DBV) package.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Data sheet LP2985 150-mA, Low-Noise, Low-Dropout Regulator With Shutdown datasheet (Rev. R) PDF | HTML 10 Jul 2023

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

LP2985-10 PSpice Transient Model

SLVMA21.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-10 Unencrypted PSpice Transient Model

SNVMB87.ZIP (1 KB) - PSpice Model
Simulation model

LP2985-18 PSpice Transient Model

SLVMA17.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-18 Unencrypted PSpice Transient Model

SNVMB86.ZIP (1 KB) - PSpice Model
Simulation model

LP2985-25 PSpice Transient Model

SLVMA22.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-25 Unencrypted PSpice Transient Model

SNVMB91.ZIP (1 KB) - PSpice Model
Simulation model

LP2985-28 PSpice Transient Model

SLVMA20.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-28 Unencrypted PSpice Transient Model

SNVMB93.ZIP (1 KB) - PSpice Model
Simulation model

LP2985-29 PSpice Transient Model

SLVMA18.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-29 Unencrypted PSpice Transient Model

SNVMB90.ZIP (1 KB) - PSpice Model
Simulation model

LP2985-30 PSpice Transient Model

SLVMA23.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-30 Unencrypted PSpice Transient Model

SNVMB88.ZIP (1 KB) - PSpice Model
Simulation model

LP2985-33 PSpice Transient Model

SLVMA24.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-33 Unencrypted PSpice Transient Model

SNVMB89.ZIP (1 KB) - PSpice Model
Simulation model

LP2985-50 PSpice Transient Model

SLVMA19.ZIP (20 KB) - PSpice Model
Simulation model

LP2985-50 Unencrypted PSpice Transient Model

SNVMB92.ZIP (1 KB) - PSpice Model
Reference designs

PMP23332 — Interleaved and multiphase inverting buck-boost converter reference design

This reference design uses the UCD3138064A as a digital controller to control inverting buck-boost with the capability of supporting two-phase peak current mode control. The soft-switching technology is used in this design to improve the power efficiency. The input voltage range is -62 V to -36 V. (...)
Test report: PDF
Package Pins Download
SOT-23 (DBV) 5 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos