Manufacturer Part Number

TPS73230DBVR

Description

Low-dropout linear voltage regulator IC made by Texas Instruments. Provides a fixed 3V regulated output with up to 250mA output current. Comes in a compact SOT-23-5 surface mount package. Ideal for portable devices and applications requiring stable, efficient voltage regulation.

Specifications

Input Voltage Maximum: 5.5V

Output Voltage: Fixed 3V

Output Current Maximum: 250mA

Dropout Voltage (Max): 0.15V at 250mA

Quiescent Current (Typical): 550μA

Maximum Supply Current: 950μA

Power Supply Rejection Ratio (PSRR): 58dB at 100Hz to 37dB at 10kHz

Output Type: Positive, Single Output

Enable Pin for On/Off Control

Protections: Overcurrent, Overtemperature, Short Circuit, Reverse Polarity

Operating Temperature Range: -40°C to +125°C

Package: SOT-23-5 (SC-74A, SOT-753)

RoHS: Compliant

Moisture Sensitivity Level: 1 (unlimited), safe for most manufacturing environments

REACH Status: Unaffected

ECCN: EAR99, non-controlled export

HTSUS: 8542.39.0001

Device Structure

Single positive voltage linear regulator

Five-pin SOT-23-5 surface-mount package

Includes enable (EN) control pin for power management

Straightforward pinout for easy PCB layout

Built-in protection circuits integrated internally

Performance Characteristics

Low dropout voltage helps maintain stable output even with low input voltages

Low quiescent current makes it energy efficient, suitable for battery-powered and portable equipment

Good PSRR minimizes noise transfer from input to output

Fast startup and enable/disable response

High reliability over industrial temperature range

Can withstand output short circuits, overcurrent events, and overtemperature without damage

Reverse polarity protection helps prevent accidental mis-connections

Application Environments

Suitable for powering analog circuits, microcontrollers, sensors, low-noise RF circuits, and battery-powered electronics

Good fit for portable equipment, handheld devices, medical instruments, industrial sensors, and communications devices

Often used in systems where tight voltage regulation and low noise are important, such as precision sensor supplies or RF subsystems

Selection Guidelines

Choose if a fixed 3V output at up to 250mA is needed and input voltage is below 5.5V

Best suited for designs that require low dropout, low noise, and good PSRR

Verify the output current and voltage needs match this device’s capability

Select when SOT-23-5 footprint and small size are required

Ensure enable feature is needed or can be utilized in the design

Usage Considerations

Observe maximum input voltage of 5.5V

Do not exceed 250mA output current

Good PCB layout for heat dissipation and noise performance is recommended

Filter input and output with suitable capacitors for stable operation (refer to datasheet for recommended values)

Allow for adequate airflow or PCB copper for heat sinking if operating at high currents

Ensure protection features are not unintentionally triggered

Enable pin should be properly controlled if not used, tie to VIN if always on

Potential Equivalent/Replacement Models

Texas Instruments TPS732xx series has other fixed voltage variants (e.g., TPS73218DBVR for 1.8V, TPS73233DBVR for 3.3V, TPS73225DBVR for 2.5V output)

Similar function can be found in Texas Instruments TPS7A02, TPS7A05 series (with possible differences in voltage, dropout, current, or package)

Analog Devices ADP3330, ADP7102, ON Semiconductor NCP4681, NCP4684, or Microchip MIC5365, MIC5366 offer comparable linear regulators with low dropout and low quiescent current

Always verify pinout, thermal performance, enable logic, and electrical ratings before substitution

If exact or equivalent models are not found above, contact Ariat-Tech sales team for more information and recommended replacements.

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