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Product details

Parameters

Output options Fixed Output Iout (Max) (A) 0.15 Vin (Max) (V) 16 Vin (Min) (V) 2.2 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, 6.1 Noise (uVrms) 30 Iq (Typ) (mA) 0.065 Thermal resistance θJA (°C/W) 169 Load capacitance (Min) (µF) 2.2 Rating Catalog Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR @ 100 KHz (dB) 30 Dropout voltage (Vdo) (Typ) (mV) 280 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Linear regulators (LDO)

Features

  • Input Voltage Range: 2.5 V to 16 V
  • Ultra Low-Dropout Voltage
  • Ensured 150 mA Output Current
  • Requires Minimum External Components
  • Stable With Low-ESR Output Capacitor
  • < 1 µA Quiescent Current When Shut Down
  • Low Ground Pin Current at All Loads
  • Output Voltage Accuracy 1% (A Grade)
  • High Peak Current Capability
  • Low ZOUT: 0.3 Ω Typical (10 Hz to 1 MHz)
  • Overtemperature and Overcurrent Protection
  • −40°C to 125°C Junction Temperature Range
  • Custom Voltages Available
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Description

The LP2985-N low noise linear (LDO) regulator delivers up to 150-mA output current and only requires 300-mV dropout voltage of input to output. Using an optimized vertically integrated PNP (VIP) process, the LP2985-N delivers unequaled performance for all battery-powered designs. The LP2985-N device provides 1% tolerance precision output voltage with only 75-µA quiescent current at 1-mA load and 850 µA at 150-mA load. By adding a 10-nF bypass capacitor, the output noise can be reduced to 30 µVRMS in a 30-kHz bandwidth.

The LP2985-N is designed to work with a ceramic output capacitor with equivalent series resistance (ESR) as low as 5 mΩ. The device is available with fixed output voltage from 2.5 V to 6.1 V. Contact Texas Instrument Sales for specific voltage option needs.

For all available packages, see the orderable addendum at the end of the data sheet.
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Exact equivalent in functionality and parametrics to the compared device:
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Technical documentation

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Type Title Date
* Datasheet LP2985-N Micropower 150-mA Low-Noise Ultra-Low-Dropout Regulator in a SOT-23 Package Designed for Use With Very Low ESR Output Capacitors datasheet (Rev. Y) Dec. 20, 2016
Application notes A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Application notes AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) May 06, 2013
User guides AN-1840 USB I 2 C Interface Board Reference Manual (Rev. A) Apr. 30, 2013
Application notes AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B) Apr. 25, 2013
White papers Engineers note: Capacitors are key to voltage regulator design Jul. 01, 2002

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Multiple board perforations provide maximum evaluation and system design flexibility
  • EVM does not require additional components for operation, enabling rapid device evaluation
  • Accompanying GUI for quick concept demonstration and data capture
EVALUATION BOARDS Download
document-generic User guide
199
Description

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 LDC1312LDC1612 and LDC1614.

Evaluation steps

Step 1: Purchase the LDC1314DIAL-EVM
Step 2 (...)

Features
  • Absolute angle sensing with 1 degree accuracy with 0.1 degree resolution
  • No magnets used and not affected by DC magnetic fields
  • Maximum speed of 200 RPM

Design tools & simulation

SIMULATION MODELS Download
SNVM632.ZIP (40 KB) - PSpice Model
SIMULATION MODELS Download
SNVM633.ZIP (40 KB) - PSpice Model
SIMULATION MODELS Download
SNVM634.ZIP (41 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA84.ZIP (1 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA85.ZIP (1 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA86.ZIP (1 KB) - PSpice Model

Reference designs

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TIDA-00300 This reference design provides a simple means through which to isolate I2C or SPI type communication lines. This is often required in Grid Infrastructure applications such as, protertion relays and circuit breakers, where high voltages are involved. This reference design provides the complete (...)
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TIDA-00440 This TI design provides a reference solution to measure Insulation Resistance up to 100MΩ. It has an on-board isolated 500Vdc 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 (...)
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5.85W Isolated Self-Driven Synchronous Inverting Fly-Buckboost with Optocoupler Reference Design
PMP30197 — The PMP30197 reference design is an inverting Fly-BuckBoost power supply using the LM2743 to generate an isolated output voltage of 3.9V. The design accepts an input voltage of 2V to 5.25V.  The converter regulates the secondary side output with an optocoupler and is capable of achieving good (...)
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HVAC Coil Airflow Sensor Reference Design for Predictive Maintenance in Air Filter Replacement
TIDA-01070 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 (...)
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16-button Inductive Keypad Reference Design Using the LDC1314 Inductance-to-Digital Converter
TIDA-00509 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 (...)

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Dual Battery Charger IC Reference Design (connected in Cascode Configuration)
TIDA-00590 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 (...)
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1-Degree Dial Reference Design Using the LDC1314 Inductance-to-Digital Converter
TIDA-00508 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.  (...)

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CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

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