Home Power management Linear & low-dropout (LDO) regulators
Home
Power management
Linear & low-dropout (LDO) regulators

LP2985-N

ACTIVE

150-mA, 16-V, low-dropout voltage regulator with enable

Order now
Data sheet

LP2985-N

ACTIVE
Data sheet Order now

Product details

Rating Catalog Vin (max) (V) 16 Vin (min) (V) 2.2 Iout (max) (A) 0.15 Output options Adjustable Output, Fixed Output Vout (max) (V) 6.1 Vout (min) (V) 1.8 Fixed output options (V) 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.5, 5, 5.7, 6.1 Noise (µVrms) 30 PSRR at 100 KHz (dB) 30 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 169 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 280 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 16 Vin (min) (V) 2.2 Iout (max) (A) 0.15 Output options Adjustable Output, Fixed Output Vout (max) (V) 6.1 Vout (min) (V) 1.8 Fixed output options (V) 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.5, 5, 5.7, 6.1 Noise (µVrms) 30 PSRR at 100 KHz (dB) 30 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 169 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 280 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • VIN range: 2.5V to 16V
  • VOUT range (new chip):
    • 1.2V to 5.0V (fixed, 100mV steps)
  • VOUT range (legacy chip): 2.5V to 6.1V
  • VOUT accuracy:
    • ±1% for A-grade (legacy chip)
    • ±1.5% for standard-grade (legacy chip)
    • ±0.5% (new chip)
  • Output accuracy over load, and temperature:
    • ±1% (new chip)
  • Output current: Up to 150mA
  • Low IQ (new chip): 71µA at ILOAD = 0mA
  • Low IQ (new chip): 750µA at ILOAD = 150mA
  • Shutdown current:
    • 0.05µA (typical, legacy chip)
    • 1.12µA (typical, new chip)
  • Low noise: 30µVRMS with 10nF bypass capacitor
  • Output current limiting and thermal protection
  • Stable with 2.2µF ceramic capacitors (new chip)
  • High PSRR: 70dB at 1kHz, 40dB at 1MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)
  • VIN range: 2.5V to 16V
  • VOUT range (new chip):
    • 1.2V to 5.0V (fixed, 100mV steps)
  • VOUT range (legacy chip): 2.5V to 6.1V
  • VOUT accuracy:
    • ±1% for A-grade (legacy chip)
    • ±1.5% for standard-grade (legacy chip)
    • ±0.5% (new chip)
  • Output accuracy over load, and temperature:
    • ±1% (new chip)
  • Output current: Up to 150mA
  • Low IQ (new chip): 71µA at ILOAD = 0mA
  • Low IQ (new chip): 750µA at ILOAD = 150mA
  • Shutdown current:
    • 0.05µA (typical, legacy chip)
    • 1.12µA (typical, new chip)
  • Low noise: 30µVRMS with 10nF bypass capacitor
  • Output current limiting and thermal protection
  • Stable with 2.2µF ceramic capacitors (new chip)
  • High PSRR: 70dB at 1kHz, 40dB at 1MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)

The LP2985-N is a fixed-output, wide-input, low-noise, low-dropout voltage regulator. The device supports an input voltage range from 2.5V to 16V (new chip) and up to 150mA of load current. The LP2985-N supports an output range of 1.2V to 5.0V (new chip) and 2.5V to 6.1V (legacy chip).

Additionally, the LP2985-N (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 30µVRMS (with 10nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70dB at 1kHz and 40dB at 1MHz (for new chip) help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The new chip version of LP2985-N has internal soft-start mechanism that reduces inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2985-N is available in a 5-pin, 2.9mm × 2.8mm SOT-23 (DBV) package.

The LP2985-N is a fixed-output, wide-input, low-noise, low-dropout voltage regulator. The device supports an input voltage range from 2.5V to 16V (new chip) and up to 150mA of load current. The LP2985-N supports an output range of 1.2V to 5.0V (new chip) and 2.5V to 6.1V (legacy chip).

Additionally, the LP2985-N (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 30µVRMS (with 10nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70dB at 1kHz and 40dB at 1MHz (for new chip) help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The new chip version of LP2985-N has internal soft-start mechanism that reduces inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2985-N is available in a 5-pin, 2.9mm × 2.8mm SOT-23 (DBV) package.
filter Find other Linear & low-dropout (LDO) regulators
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
LP2985 ACTIVE 150-mA, 16-V, low-dropout voltage regulator with enable Pin-to-pin equivalent for cost-sensitive applications
TPS709 ACTIVE 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable Wider voltage range
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 Pin-to-pin option with ultra-low-IQ (2 uA)

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 7
Type Title Date
* Data sheet LP2985-N 150mA, Low-Noise, Low-Power, Ultra-Low-Dropout Regulator in a SOT-23 Package datasheet (Rev. AB) PDF | HTML 06 Jun 2025
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Technical article Trends in building automation: connected sensors for user comfort PDF | HTML 02 Sep 2016
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 06 May 2013
User guide AN-1840 USB I 2 C Interface Board Reference Manual (Rev. A) 30 Apr 2013
Application note AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B) 25 Apr 2013
White paper Engineers note: Capacitors are key to voltage regulator design 01 Jul 2002

Design & development

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

Evaluation board

FDC1004QEVM — Automotive 4-Channel Capacitive to Digital Converter Evaluation Module

The FDC1004Q evaluation module is used to evaluate the FDC1004-Q1, automotive 4-channel capacitive-to-digital converter. The evaluation modules features a breakable PCB composed of three sections: a USB to I²C converter based on the MSP430F5528 microcontroller, the FDC1004-Q1, and two sensor (...)

User guide: PDF
Not available on TI.com
Evaluation board

LDC1314DIAL-EVM — LDC1314 inductance-to-digital converter evaluation module: 1-degree dial

The LDC1314DIAL evaluation module implements a contactless rotational position sensing solution that is accurate to 1 degree with 0.1 degree resolution.

This design uses the LDC1314 but can also be replicated with the LDC1312, LDC1612 and LDC1614.

Not available on TI.com
Simulation model

LP2985_N_2P5 PSpice Transient Model

SNVM632.ZIP (40 KB) - PSpice Model
Download
Simulation model

LP2985_N_2P5 Unencrypted PSpice Transient Model

SNVMA86.ZIP (1 KB) - PSpice Model
Download
Simulation model

LP2985_N_3P3 PSpice Transient Model

SNVM634.ZIP (41 KB) - PSpice Model
Download
Simulation model

LP2985_N_3P3 Unencrypted PSpice Transient Model

SNVMA84.ZIP (1 KB) - PSpice Model
Download
Simulation model

LP2985_N_5P0 PSpice Transient Model

SNVM633.ZIP (40 KB) - PSpice Model
Download
Simulation model

LP2985_N_5P0 Unencrypted PSpice Transient Model

SNVMA85.ZIP (1 KB) - PSpice Model
Download
Reference designs

TIDA-00300 — Isolated power architecture reference design for communication and analog input/output modules

This reference design provides a means to isolate I2C or SPI communication lines. This is often required in grid infrastructure applications such as protection relays and circuit breakers where high voltages are involved. This reference design provides both power isolation and signal isolation.
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00508 — 1-Degree Dial Reference Design Using the LDC1314 Inductance-to-Digital Converter

The LDC1314's unique inductive sensing capability is used to implement a contactless rotational position sensing solution that is accurate to 1 degree. It uses standard PCB technology and easily manufactured components to implement a low cost solution.

This reference design uses the LDC1314.  (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00440 — Leakage Current Measurement Reference Design for Determining Insulation Resistance

This reference design measures insulation resistance up to 100 MΩ. It has an on-board isolated 500-Vdc power supply and an isolated signal conditioning circuit to measure the leakage current. This design is useful to find leakage due to insulation breakdown in transformer and motor windings.
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00509 — 16-button Inductive Keypad Reference Design Using the LDC1314 Inductance-to-Digital Converter

The LDC1314's unique inductive sensing capability is used to implement a contactless, 16 button, multi-function keypad. It uses standard PCB technology and easily manufactured components to implement a low cost solution.

This reference design uses the LDC1314.  This reference design can also be (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01070 — HVAC Coil Airflow Sensor Reference Design for Predictive Maintenance in Air Filter Replacement

This design provides a reference for monitoring airflow efficiency and temperature through heat ventilation and air conditioner (HVAC) systems. The reference design is used in conjunction with solid state relays and piezoelectric vibration sensors to monitor and react accordingly to low airflow and (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01465 — Capacitive Frost or Ice Detection Reference Design, Resolution of <1mm, Temperature Drift <0.25%

Frost and ice buildup on cooling bodies and evaporators can significantly decrease system energy efficiency in many appliance applications such as refrigerators, air conditioners, and freezers. This sensor reference design helps to achieve the more stringent energy efficiency requirements of (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP20587 — Inverting buck-boost reference design

This reference design uses UCD3138064A as a digital controller to control two-phase two-rail inverting buck-boost. This non-isolated converter is used for wireless radio power. The input voltage is from -35 V to -60 V. There are two outputs. The default output voltage of rail 1 is 32 V and max (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-01102 — Inductive Touch Stainless Steel Keypad Reference Design for Waterproof/Noise Immune HMI Applications

This 16-button stainless steel keypad, which utilizes TI's inductive touch technology, demonstrates highly sensitive buttons on a single piece of 0.6mm thick stainless steel metal.  The design utilizes a MUXed approach to implement many buttons with a single LDC1614. The design is (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00590 — Dual Battery Charger IC Reference Design (connected in Cascode Configuration)

Higher capacity 1S batteries in the latest smartphones and tablets need higher charge currents to charge faster.  With 12-V power sources, two 5-A battery charger ICs connected in cascode, parallel configuration can provide more than 5-A charging current.  In addition, the heat from the (...)
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 5 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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

View all forum topics

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