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Product details

Parameters

Output options Adjustable Output, Fixed Output Iout (Max) (A) 0.5 Vin (Max) (V) 15 Vin (Min) (V) 2.7 Vout (Max) (V) 5.5 Vout (Min) (V) 1.3 Fixed output options (V) 2.5, 3, 3.3, 5 Noise (uVrms) 33 Iq (Typ) (mA) 1 Thermal resistance θJA (°C/W) 150 Load capacitance (Min) (µF) 0 Rating Catalog Regulated outputs (#) 1 Features Enable, Power Good Accuracy (%) 2 PSRR @ 100 KHz (dB) 20 Dropout voltage (Vdo) (Typ) (mV) 115 Operating temperature range (C) -40 to 85 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 SOT-223 (DCQ) 6 46 mm² 6.5 x 7.06 TO-263 (KTT) 5 155 mm² 10.16 x 15.24 open-in-new Find other Linear regulators (LDO)

Features

  • NEW DMOS TOPOLOGY:
    Ultra Low Dropout Voltage:
    115mV Typ at 500mA and 3.3V Output
    Output Capacitor NOT Required for Stability
  • FAST TRANSIENT RESPONSE
  • VERY LOW NOISE: 33µVrms
  • HIGH ACCURACY: ±2% max
  • HIGH EFFICIENCY:
    IGND = 1mA at IOUT = 500mA
    Not Enabled: IGND = 0.5µA
  • 2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE OUTPUT VERSIONS
  • FOLDBACK CURRENT LIMIT
  • THERMAL PROTECTION
  • OUTPUT VOLTAGE ERROR INDICATOR(1)
  • SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5, SO-8
  • APPLICATIONS
    • PORTABLE COMMUNICATION DEVICES
    • BATTERY-POWERED EQUIPMENT
    • PERSONAL DIGITAL ASSISTANTS
    • MODEMS
    • BAR-CODE SCANNERS
    • BACKUP POWER SUPPLIES

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

Description

The REG103 is a family of low-noise, low-dropout, linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low-dropout voltage (only 115mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF.

Typical ground pin current is only 1mA (at IOUT = 500mA) and drops to 0.5µA in not enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions. The REG103 has very low output noise (typically 33µVrms for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. On-chip trimming results in high output voltage accuracy. Accuracy is maintained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (–40°C to +85°C).

The SO-8 version of the REG103 has an ERROR\ pin that provides a power good flag, indicating the regulator is in regulation. The REG103 is well protected—internal circuitry provides a current limit that protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. In addition to the SO-8 package, the REG103 is also available in the DDPAK and the SOT223-5.

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

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 11
Type Title Date
* Datasheet DMOS 500mA Low-Dropout Regulator datasheet (Rev. D) Sep. 22, 2005
Application notes LDO Noise Demystified (Rev. B) Aug. 18, 2020
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
Application notes LDO PSRR Measurement Simplified (Rev. A) Aug. 09, 2017
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Application notes Packaging Limits Range of Linear Regulators May 08, 2010
User guides DEM-SOT223LDO Demonstration Fixture Oct. 15, 2003
User guides DEM-TO263LDO Demonstration Fixture Oct. 15, 2003
More literature DMOS Delivers Dramatic Performance Gains to LDO Regulators (EDN mag) Feb. 14, 2001

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
5
Description

The Texas Instruments DEM-SOT223LDO demonstration module (DEM) helps designers evaluate the operation and performance of Texas Instruments low-dropout regulators (LDOs).  This module is compatible with most positive output LDOs offered in the SOT223 (DCQ) package.

EVALUATION BOARDS Download
document-generic User guide
49
Description

The TPS76918EVM-127 give designer an easy layout for using and evaluating TPS76918 SOT23 LDO in an application to regulate from 5V to a 1.8V output. It includes input and output capacitors.

Features

Same size and TO220 package. Simplifies designing the core power power supply for low power TMS320C54x DSPs.

EVALUATION BOARDS Download
document-generic User guide
49
EVALUATION BOARDS Download
document-generic User guide
49
Description

The purpose of this EVM is to facilitate evaluation of the TPS793xx family of LDO regulators. Each EVM package contains one SLVP191 test board, with either a TPS79301DBV linear regulator or a TPS79328DBV linear regulator, as well as supporting passive components. The TPS79301DBV adjustable device (...)

CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 5 View options
SOIC (D) 8 View options
SOT-223 (DCQ) 6 View options

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