TLV743P - 300mA Low-Dropout Regulator | Texas Instruments
MPN: TLV743P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.35 | $0.35 |
| 10 | $0.3 | $3.00 |
| 100 | $0.25 | $25.00 |
| 500 | $0.2 | $100.00 |
| 1,000 | $0.18 | $180.00 |
Drop-in alternatives for TLV743P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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TLV74330PDBVR
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View Datasheet →TLV743P Maximum Ratings & Electrical Characteristics
| Output Type | Fixed |
| Output Voltage Options | 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V |
| Maximum Output Current | 300 mA |
| Input Voltage Range | 1.4V to 5.5V |
| Dropout Voltage | 220 mV at 300 mA (typical) |
| Accuracy | 1% typical |
| Quiescent Current | 1.2 µA (typical) |
| Output Capacitor | 1 µF (minimum) |
| Line Regulation | 0.02%/V (typical) |
| Load Regulation | 0.02%/mA (typical) |
| PSRR | 60 dB at 1 kHz (typical) |
| Output Noise | 30 µVrms (typical) |
| Operating Temperature | -40°C to +125°C |
| Package | SOT-23 (DBV), X2SON (DQN) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
TLV743P Pin Configuration
| Pin 1 | IN — Input voltage |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable (active high) |
| Pin 4 | NC — No connect |
| Pin 5 | OUT — Regulated output |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TLV743P is suitable for 6 applications: Portable Electronics, Wearable Devices, IoT Devices, Battery-Powered Sensors, Audio Devices, Industrial Control.
Portable Electronics
The TLV743P's ultra-low quiescent current of 1.2 µA and small SOT-23 package make it ideal for battery-powered portable devices. It provides a stable 300 mA output with 1% accuracy, ensuring reliable operation of microcontrollers and sensors. The low dropout voltage of 220 mV maximizes battery utilization, extending runtime in smartphones, wearables, and handheld instruments.
Recommended
Wearable Devices
In wearables, space and power are critical. The TLV743P's X2SON package (1.0mm x 1.0mm) and 1.2 µA quiescent current enable compact, energy-efficient designs. It regulates power for sensors, displays, and wireless modules with minimal heat dissipation. The 1 µF output capacitor requirement reduces component count, saving board space in fitness trackers and smartwatches.
Recommended
IoT Devices
The TLV743P is well-suited for IoT nodes that require low standby power and reliable regulation. Its 1.2 µA quiescent current extends battery life in always-on sensors and wireless transceivers. The 1% accuracy ensures stable supply for RF modules, while the foldback current control protects against inrush during startup. The small package fits compact IoT designs.
Recommended
Battery-Powered Sensors
For battery-powered sensors, the TLV743P provides efficient power regulation with minimal quiescent current. Its low dropout voltage allows operation from nearly depleted batteries, maximizing sensor uptime. The 1 µF output capacitor ensures stability across load transients, making it suitable for sensors that draw intermittent current pulses. The small package fits into compact sensor nodes.
Recommended
Audio Devices
The TLV743P's low output noise of 30 µVrms makes it suitable for audio applications where clean power is essential. It can power audio codecs, amplifiers, and DACs with minimal added noise. The 1% accuracy ensures consistent bias voltages, while the small package fits into portable audio players and headphones. The low quiescent current helps preserve battery life in portable audio gear.
Recommended
Industrial Control
In industrial control systems, the TLV743P provides reliable power regulation for microcontrollers, sensors, and communication interfaces. Its wide operating temperature range (-40°C to +125°C) ensures performance in harsh environments. The 1% accuracy and low dropout voltage maintain stable operation under varying load conditions. The small package is suitable for space-limited control modules.
Recommended
Recommended Products Summary
Engineering reference data for TLV743P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLV74330PDBVR | TLV74312PDBVR | TLV74333PDBVR | TLV70018DCKR |
|---|---|---|---|---|---|
| Package | SOT-23 (DBV) | SOT-23 (DBV) | SOT-23 (DBV) | SOT-23 (DBV) | SOT-23 (DBV) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 300 mA | 300 mA | 300 mA | 300 mA | 200 mA |
| Output Voltage | Fixed options | 3.3V | 1.2V | 3.3V | 1.8V |
| Quiescent Current | 1.2 µA | 1.2 µA | 1.2 µA | 1.2 µA | 1 µA |
| Dropout Voltage | 220 mV | 220 mV | 220 mV | 220 mV | 200 mV |
| Accuracy | 1% | 1% | 1% | 1% | 2% |
| Enable Pin | No | No | No | No | Yes |
Key Differentiators
- Ultra-low quiescent current of 1.2 µA (vs TLV70018DCKR)
- Higher output current of 300 mA (vs TLV70018DCKR)
- Better accuracy of 1% (vs TLV70018DCKR)
Design Notes
Place the 1 µF output capacitor as close to the OUT pin as possible to ensure stability and minimize noise. Use a low-ESR ceramic capacitor with a voltage rating at least 1.5 times the output voltage. The input capacitor is optional but recommended for applications with long supply traces.
The TLV743P in SOT-23 package has a thermal resistance of approximately 250°C/W. At 300 mA output with a 1V dropout, power dissipation is 0.3W, causing a temperature rise of 75°C. Ensure adequate PCB copper area for heat dissipation, especially in high ambient temperature environments.
Do not exceed the input voltage rating of 5.5V. The active pulldown circuit discharges the output when the device is disabled, but if the device is always on, ensure the output is not back-driven. The foldback current control limits inrush current during startup, but verify it does not affect your load's startup requirements.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified.
