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Product details

Parameters

Output options Fixed Output Iout (Max) (A) 0.1 Vin (Max) (V) 16 Vin (Min) (V) 2.7 Vout (Max) (V) 5 Vout (Min) (V) 2.5 Fixed output options (V) 2.5, 3, 3.3, 3.6, 5 Noise (uVrms) 160 Iq (Typ) (mA) 0.065 Thermal resistance θJA (°C/W) 176 Approx. price (US$) 0.30 | 1ku Load capacitance (Min) (µF) 2.2 Rating Catalog Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR @ 100 KHz (dB) 41 Dropout voltage (Vdo) (Typ) (mV) 200 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

  • Operating Input Voltage Range: 2.1 V to 16 V
  • Ultralow-Dropout Voltage
  • Output Voltage Accuracy 0.75% (A Grade)
  • Specified 100-mA Output Current
  • < 1-μA Quiescent Current when Shutdown
  • Low Ground Pin Current at All Load Currents
  • High Peak Current Capability (300 mA Typical)
  • Wide Supply Voltage Range (16 V Maximum)
  • Fast Dynamic Response to Line and Load
  • Low ZOUT Over Wide Frequency Range
  • Overtemperature and Overcurrent Protection
  • −40°C to 125°C Junction Temperature Range
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Description

The LP2981-N is a 100-mA, fixed-output voltage regulator designed specifically to meet the requirements of battery-powered applications.

Using an optimized Vertically Integrated PNP (VIP) process, the LP2981-N delivers unequaled performance in all specifications critical to battery-powered designs:

Dropout Voltage: Typically 200 mV at 100-mA load, and 7 mV at 1-mA load.

Ground Pin Current: Typically 600 μA at 100-mA load, and 80 μA at 1-mA load.

Sleep Mode: Less than 1-μA quiescent current when ON/OFF pin is pulled low.

Precision Output: 0.75% tolerance output voltages available (A grade).

Assorted voltage options, from 2.5 V to 5 V, are available as standard products.

For all available packages, see the orderable addendum at the end of the data sheet.
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Technical documentation

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Type Title Date
* Datasheet LP2981-N Micropower 100-mA Ultralow Dropout Regulator in SOT-23 Package datasheet (Rev. N) Apr. 01, 2016
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
User guides Universal Low-Dropout (LDO) Linear Voltage Regulator EVM User's Guide Oct. 12, 2016
Application notes AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B) Apr. 25, 2013
Application notes AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) Apr. 23, 2013

Design & development

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

Reference designs

REFERENCE DESIGNS Download
22-W/in3, 93.1% peak efficiency, 100-W USB-PD 3.0 AC/DC adapter reference design with Si MOSFET
TIDA-010047 — This fully-tested reference design is a high-efficiency, high-power-density, AC/DC adapter solution with a wide input voltage range (100- to 240-V AC) for laptop adapters and smartphone charger applications. This design consists of a front-end transition-mode (TM) power factor correction (PFC (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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

Ordering & quality

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