Product details

Output options Adjustable Output, Fixed Output Iout (Max) (A) 1 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) 1.7 Thermal resistance θJA (°C/W) 27 Rating Catalog Load capacitance (Min) (µF) 0 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (Typ) (mV) 230 Operating temperature range (C) -40 to 85
Output options Adjustable Output, Fixed Output Iout (Max) (A) 1 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) 1.7 Thermal resistance θJA (°C/W) 27 Rating Catalog Load capacitance (Min) (µF) 0 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (Typ) (mV) 230 Operating temperature range (C) -40 to 85
SOT-223 (DCQ) 6 46 mm² 6.5 x 7.06 TO-263 (KTT) 5 155 mm² 10.16 x 15.24
  • NEW DMOS TOPOLOGY:
    Ultra Low Dropout Voltage:
    230mV typ at 1A and 3.3V Output
    Output Capacitor NOT Required for Stability
  • FAST TRANSIENT RESPONSE
  • VERY LOW NOISE: 33µVRMS
  • HIGH ACCURACY: ±2% max
  • HIGH EFFICIENCY:
    IGND = 1.7mA at IOUT = 1A
    Not Enabled: IGND = 0.5µA
  • 2.5V, 2.7V, 3.0V, 3.3V, 5.0V AND ADJUSTABLE OUTPUT VERSIONS
  • THERMAL PROTECTION
  • SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5
  • APPLICATIONS
    • PORTABLE COMMUNICATION DEVICES
    • BATTERY-POWERED EQUIPMENT
    • MODEMS
    • BAR-CODE SCANNERS
    • BACKUP POWER SUPPLIES

All trademarks are the property of their respective owners.

  • NEW DMOS TOPOLOGY:
    Ultra Low Dropout Voltage:
    230mV typ at 1A and 3.3V Output
    Output Capacitor NOT Required for Stability
  • FAST TRANSIENT RESPONSE
  • VERY LOW NOISE: 33µVRMS
  • HIGH ACCURACY: ±2% max
  • HIGH EFFICIENCY:
    IGND = 1.7mA at IOUT = 1A
    Not Enabled: IGND = 0.5µA
  • 2.5V, 2.7V, 3.0V, 3.3V, 5.0V AND ADJUSTABLE OUTPUT VERSIONS
  • THERMAL PROTECTION
  • SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5
  • APPLICATIONS
    • PORTABLE COMMUNICATION DEVICES
    • BATTERY-POWERED EQUIPMENT
    • MODEMS
    • BAR-CODE SCANNERS
    • BACKUP POWER SUPPLIES

All trademarks are the property of their respective owners.

The REG104 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 230mV 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 1.7mA (at IOUT = 1A) 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 REG104 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 REG104 is well protected—internal circuitry provides a current limit which protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG104 is available in the DDPAK-5 and the SOT223-5.

The REG104 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 230mV 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 1.7mA (at IOUT = 1A) 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 REG104 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 REG104 is well protected—internal circuitry provides a current limit which protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG104 is available in the DDPAK-5 and the SOT223-5.

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Technical documentation

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Type Title Date
* Data sheet DMOS 1A Low-Dropout Regulator datasheet (Rev. G) 22 Sep 2005
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note LDO Noise Demystified (Rev. B) 18 Aug 2020
Application note LDO PSRR Measurement Simplified (Rev. A) 09 Aug 2017
Application note Packaging Limits Range of Linear Regulators 08 May 2010
User guide DEM-SOT223LDO Demonstration Fixture 15 Oct 2003
User guide DEM-TO263LDO Demonstration Fixture 15 Oct 2003
More literature DMOS Delivers Dramatic Performance Gains to LDO Regulators (EDN mag) 14 Feb 2001

Design & development

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

Evaluation board

DEM-SOT223LDO — DEM-SOT223LDO Compatible with Most Positive Output LDOs in SOT223 (DCQ) Package

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.

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Evaluation board

SN65DSI83EVM — SN65DSI83 MIPI® DSI to LVDS bridge evaluation module & FlatLink™ integrated circuit

The SN65DSI83EVM evaluation module (EVM) is a printed circuit board (PCB) that helps customers implement the SN65DSI85 device in system hardware.  This EVM can be used as a hardware reference design for any implementation using the SN65DSI83 device. This EVM includes (...)
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Evaluation board

SN65DSI83Q1-EVM — MIPI® DSI to LVDS bridge & FlatLink™ integrated circuit evaluation module

The SN65DSI83Q1-EVM evaluation module (EVM) is a printed circuit board (PCB) that helps customers implement the SN65DSI83-Q1 device in system hardware.  This EVM includes on-board connectors for DSI input and LVDS output signals.  These connectors are for connecting (...)
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Evaluation board

SN65DSI85EVM — SN65DSI85 dual-channel MIPI® DSI to dual-link FlatLink™ LVDS bridge evaluation module

The SN65DSI85EVM evaluation module (EVM) is a printed circuit board (PCB) that helps customers implementthe SN65DSI85 device in system hardware. This EVM can be used as a hardware reference design for any implementation using the SN65DSI85 device. The SN65DSI85EVM includes (...)
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Evaluation board

SN65DSI85Q1-EVM — Dual-Channel MIPI® DSI to Dual-Link FlatLink™ LVDS Bridge Evaluation Module

The SN65DSI85Q1EVM is a PCB created to help customers implementing SN65DSI85Q1 in system hardware.  This EVM includes on-board connectors for DSI input and LVDS output signals.  These connectors are for connecting MIPI DPHY compliant DSI source and LVDS panels to the EVM.
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Evaluation board

TPS76918EVM-127 — SOT23 LDO, 5 V to 3.3 V, 100mA output power supply

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.

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Evaluation board

TPS79301EVM — TPS79301 Evaluation Module

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Evaluation board

TPS79328EVM — TPS79328 Evaluation Module

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 (...)

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Reference designs

TIPD201 — Isolated Current Shunt/Voltage Measurement Reference Design for Automotive Battery Pack Monitoring

This TI Verified Design provides the theory, component selection, TINA-TI simulations, Verification & Measurement Performance, Altium Schematics, PCB Layout for automotive Battery Pack monitoring application.  The design uses a automotive AEC-Q100 qualified 12-bit, 4-Channel, 1Msps SAR ADC, (...)
Package Pins Download
DDPAK/TO-263 (KTT) 5 View options
SOT-223 (DCQ) 6 View options

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