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Product details

Parameters

Output options Fixed Output Iout (Max) (A) 0.5 Vin (Max) (V) 16 Vin (Min) (V) 2.1 Vout (Max) (V) 5 Vout (Min) (V) 2.5 Fixed output options (V) 2.5, 2.8, 3, 3.3, 3.8, 5 Noise (uVrms) 18 Iq (Typ) (mA) 0.11 Thermal resistance θJA (°C/W) 35 Approx. price (US$) 0.89 | 1ku Load capacitance (Min) (µF) 4.7 Rating Catalog Regulated outputs (#) 1 Features Enable, Power Good Accuracy (%) 2 PSRR @ 100 KHz (dB) 32 Dropout voltage (Vdo) (Typ) (mV) 310 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (NGN) 8 16 mm² 4 x 4 open-in-new Find other Linear regulators (LDO)

Features

  • 2.1-V to 16-V Input Voltage Range
  • 2.5-V to 5-V Fixed Output Voltage Options
  • Ultra-Low Dropout Voltage
  • 500-mA Continuous Output Current
  • Very Low Output Noise With External Capacitor
  • < 0.8-µA Quiescent Current When Shutdown
  • Low Ground Pin Current at All Loads
  • 0.75% Output Voltage Accuracy (A Grade)
  • High Peak Current Capability (800-mA typical)
  • Overtemperature and Overcurrent Protection
  • −40°C to 125°C Junction Temperature Range
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Description

The LP2989 is a fixed-output 500-mA precision LDO regulator designed for use with ceramic output capacitors.

Output noise can be reduced to 18 µV (typical) by connecting an external 10-nF capacitor to the bypass pin.

Using an optimized Vertically Integrated PNP (VIP) process, the LP2989 delivers superior performance:

  • Dropout Voltage: Typically 310 mV at 500-mA load, and 1 mV at 100-µA load.
  • Ground Pin Current: Typically 3 mA at 500-mA load, and 110 µA at 100-µA load.
  • Sleep Mode: The LP2989 draws less than 0.8-µA quiescent current when SHUTDOWN pin is pulled low.
  • Error Flag: The built-in error flag goes low when the output drops approximately 5% below nominal.
  • Precision Output: Output voltage accuracy is 0.75% (A grade) and 1.25% (standard grade) at room temperature.

For output voltages < 2 V, see LP2989LV (SNVS086) data sheet.

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TPS7A26 ACTIVE 500-mA, 18-V, ultra-low-IQ, high-accuracy, adjustable low-dropout voltage regulator with power good This is a 500-mA LDO with power good and lower IQ (2.5 μA)

Technical documentation

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Type Title Date
* Datasheet LP2989 Micropower and Low-Noise, 500-mA Ultra Low-Dropout Regulator for Use With Ceramic Output Capacitors datasheet (Rev. O) Mar. 10, 2015
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
Selection guides Low Dropout Regulators Quick Reference Guide (Rev. P) Mar. 21, 2018
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Selection guides LDO Solutions Selection Wheel (Rev. F) Jun. 21, 2016
Selection guides Power Management Solutions Set-Top Box and Digital TV (Rev. A) Apr. 18, 2012

Design & development

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

Design tools & simulation

SIMULATION MODELS Download
SLVMAJ9.ZIP (45 KB) - PSpice Model
SIMULATION MODELS Download
SLVMAL0.ZIP (46 KB) - PSpice Model
SIMULATION MODELS Download
SLVMAL1.ZIP (45 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA87.ZIP (1 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA88.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA89.ZIP (1 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options
WSON (NGN) 8 View options

Ordering & quality

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