Texas Instruments TPS731 Low-Dropout (LDO) Linear Voltage Regulators
Texas Instruments TPS731 Low-Dropout (LDO) Linear Voltage Regulators use a topology with an NMOS pass element in a voltage-follower configuration. This topology is stable using output capacitors with low equivalent series resistance (ESR) and even allows operation without a capacitor. The device also provides ground pin current that is nearly constant over all output current values and a high reverse blockage (low reverse current).
The Texas Instruments TPS731 uses an advanced BiCMOS process to yield high precision while delivering low ground pin current and very low dropout voltages. Current consumption is less than 1µA, ideal for portable applications when not enabled. The extremely low output noise of 30µVRMS with 0.1µF CNR is perfect for powering VCOs. These devices are protected by foldback current limits and thermal shutdown.
Features
- Stable with or without capacitors of all types
- Input voltage range of 1.7V to 5.5V
- Ultra-low dropout voltage of 30mV (typ.) (150mA load)
- Excellent load transient response with or without an optional output capacitor
- NMOS topology provides low reverse leakage current
- Low noise of 30µVRMS (typ.) (10kHz to 100kHz)
- 0.5% initial accuracy
- 1% overall accuracy over line, load, and temperature
- Less than 1µA maximum IQ in shutdown mode
- Thermal shutdown and specified minimum and maximum current limit protection
- Available in multiple output voltage versions
- Fixed outputs of 1.20V to 5V
- Adjustable outputs from 1.2V to 5.5V
- Custom outputs are available
Applications
- Smart grid and energy
- Building automation
- Set-top boxes
- Medical equipment
- Test and measurement
- Point-of-Sale terminals
- Wireless infrastructure
Datasheets
Videos
Functional Block Diagrams
Development Tool
Texas Instruments DEM-SOT23LDO Positive LDO Regulator Eval Tool
Test fixture that helps designers evaluate the operation and performance of LDO linear regulators.
Published: 2025-01-16
| Updated: 2025-08-01