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LP2985-N

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

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

LP2985-N

ACTIVE
Data sheet Order now

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
 open-in-new Find other Linear regulators (LDO)

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. open-in-new Find other Linear regulators (LDO)
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Technical documentation

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Type Title Date
* Data sheet 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 note A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical article LDO Basics: Preventing reverse current Jul. 25, 2018
Technical article LDO basics: introduction to quiescent current Jun. 20, 2018
Technical article LDO basics: noise – part 1 Jun. 14, 2017
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) May 06, 2013
User guide AN-1840 USB I 2 C Interface Board Reference Manual (Rev. A) Apr. 30, 2013
Application note AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B) Apr. 25, 2013
White paper 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 BOARD 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
View details
EVALUATION BOARD 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 LDC1312, LDC1612 and LDC1614.

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
View details

Design tools & simulation

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

Reference designs

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PMP20587 — 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 (...)
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Isolated power architecture reference design for communication and analog input/output modules
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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Capacitive Frost or Ice Detection Reference Design, Resolution of <1mm, Temperature Drift <0.25%
TIDA-01465 — 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 (...)
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Inductive Touch Stainless Steel Keypad Reference Design for Waterproof/Noise Immune HMI Applications
TIDA-01102 — 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 (...)
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Leakage Current Measurement Reference Design for Determining Insulation Resistance
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

Ordering & quality

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  • Ongoing reliability monitoring

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