The TPS74801DRCR is a high-performance, low-dropout (LDO) linear regulator delivering 1.5A output current with ultra-low 60mV dropout voltage at full load. This adjustable regulator operates from 0.8V to 5.5V input, providing 0.8V to 3.6V output with ±2% accuracy. Its programmable soft-start, power-good signal, and enable control make it ideal for power sequencing in FPGAs, DSPs, and processors .
How Does TPS74801DRCR Compare to Other LDO Regulators?
The TPS74801DRCR outperforms standard LDOs with its current feedback architecture, achieving 50dB PSRR at 1kHz and 30dB at 300kHz. Unlike basic regulators, it maintains stability with any output capacitor ≥2.2μF and offers monotonic soft-start programming. Compared to alternatives like TPS74801DRCT or TPS74801DRCRG4, it provides superior transient response and thermal performance .
Key comparison metrics:
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Dropout voltage: 60mV @1.5A vs 165mV typical competitors
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PSRR: 50dB @1kHz vs 30dB standard LDOs
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Accuracy: ±2% vs ±3% typical
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Temperature range: -40°C to 125°C vs 0°C to 125°C basic models
What Are the Critical Specifications of TPS74801DRCR?
The TPS74801DRCR LDO regulator boasts impressive specifications including 1.5A continuous output current, 0.8V to 5.5V input range, and 0.8V to 3.6V adjustable output. Its 60mV typical dropout (165mV max) at full load enables efficient operation from low input voltages. The device features 50dB PSRR at 1kHz, 1mA quiescent current, and programmable soft-start from 0.1ms to 18ms .
Performance highlights:
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Operating temperature: -40°C to +125°C
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Output accuracy: ±2% over line/load/temperature
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Protection: Thermal shutdown, current limit, UVLO
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Package: 3mm×3mm VSON-10 with exposed pad
Which Applications Benefit Most from TPS74801DRCR?
The TPS74801DRCR excels in space-constrained, noise-sensitive applications requiring precise power sequencing. Its combination of low dropout, high PSRR, and adjustable soft-start makes it perfect for powering FPGAs, ASICs, and processors in industrial, automotive, and telecom systems. The device’s wide temperature range and robust protection suit harsh environment applications .
Ideal use cases:
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FPGA/DSP core voltage supplies
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Automotive infotainment systems
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Industrial sensor interfaces
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Medical imaging equipment
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5G baseband processing
How to Implement TPS74801DRCR in Power System Designs?
Implementing the TPS74801DRCR requires attention to layout, thermal management, and external component selection. Use 10μF ceramic input/output capacitors placed within 5mm of the device. For adjustable output, select 1% tolerance feedback resistors (R1=3.57kΩ, R2=1.15kΩ for 3.3V output). The exposed pad must connect to a large PCB copper area for heat dissipation .
Design recommendations:
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Keep feedback trace short (<10mm)
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Use 2oz copper for thermal vias
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Program soft-start with 2.7nF for 5ms rise
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Enable sequencing using PG signal
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Derate current above 85°C ambient
What Protection Features Does TPS74801DRCR Offer?
The TPS74801DRCR integrates comprehensive protection including thermal shutdown (150°C typical), current limit (2A min), and undervoltage lockout. Its power-good output monitors output regulation, while enable input allows supply sequencing. The device withstands -0.3V to 6.5V on input and -0.3V to 6.5V on output pins, surviving accidental reverse polarity .
Safety mechanisms:
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Thermal shutdown with hysteresis
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Fold-back current limiting
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Input UVLO (1.5V typical)
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Output reverse current protection
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ESD protection (2kV HBM)
Electronic Components Expert Views
“In power management designs, the TPS74801DRCR has become our go-to solution when clients need sub-100mV dropout at amperage levels. Its ability to maintain stability with minimal output capacitance solves countless layout challenges in dense PCBs. We’ve successfully deployed it in automotive camera modules where both low noise and high transient response are critical. The programmable soft-start alone has eliminated numerous inrush current issues in FPGA designs.” – Power Systems Architect, Fly-Wing Technology
Buying Tips
When sourcing TPS74801DRCR, verify manufacturer markings and date codes (2023+ recommended). For production, opt for tape-and-reel packaging (3000pcs/reel). Sample pricing ranges 1.85−2.55/unit, dropping below $0.50 in volume. Authorized distributors like Fly-Wing Technology provide full traceability and technical support. Consider alternative models (TPS74801DRCT, TPS74801DRCRG4) for design flexibility or supply chain redundancy. Always request factory-sealed units to avoid counterfeit risks.
FAQ
Q: What’s the difference between TPS74801DRCR and TPS74801DRCT?
A: The TPS74801DRCR uses VSON-10 packaging while TPS74801DRCT comes in different packaging with identical electrical specs .
Q: Can TPS74801DRCR operate from 5V input?
A: Yes, the TPS74801DRCR accepts input voltages from 0.8V to 5.5V, making 5V operation well within spec .
Q: How to program the soft-start time?
A: Soft-start time is programmed via CSS capacitor: 2.7nF=5ms, 5.6nF=10ms, 0.01μF=18ms.
Q: What’s the maximum junction temperature?
A: The TPS74801DRCR can operate up to 125°C junction temperature, with thermal shutdown at ~150°C .
Q: Is lead-free soldering compatible?
A: Yes, the TPS74801DRCR is RoHS3 compliant and suitable for lead-free reflow processes.
In modern electronic design, stable power management is crucial for ensuring proper device operation. The TPS74801DRCR, a high-performance low-dropout linear regulator (LDO) from Texas Instruments, stands out with its high precision, low noise, and flexible adjustable output voltage range, making it an ideal choice for many electronic devices.
Key Features
1. Adjustable Output Voltage
The TPS74801DRCR supports an adjustable output voltage range of 0.8V to 3.6V, catering to a variety of application scenarios.
2. Wide Input Voltage Range
The device supports an input voltage range of 0.8V to 5.5V, making it suitable for applications with wide input voltage requirements.
3. High Precision and Low Noise
The TPS74801DRCR offers ±1% output voltage accuracy, along with low output noise and high PSRR (Power Supply Rejection Ratio), effectively suppressing input voltage disturbances and noise to provide clean power output.
4. Low Power Consumption and High Efficiency
Even at low load currents, the TPS74801DRCR maintains high efficiency, making it suitable for power-saving applications.
5. Protection Features
The chip includes overcurrent protection, overtemperature protection, and short-circuit protection to safeguard the circuit under abnormal conditions.
6. Compact Packaging
Housed in a 3mm × 3mm × 1mm VSON-10 package, it is ideal for space-constrained designs.
Functions and Applications
1. Programmable Soft Start
The TPS74801DRCR features programmable soft start, which reduces inrush currents during startup, alleviating the stress on the input power supply.
2. Power-Good Output
The device provides a power-good output signal for power monitoring or timing other power supplies.
3. Application Fields
The TPS74801DRCR is widely used in portable electronic devices (such as smartphones and tablets), wireless communication equipment (such as Wi-Fi routers and Bluetooth modules), medical electronic devices (such as electrocardiographs and blood pressure monitors), industrial control systems (such as sensors and actuators), and automotive electronic systems.
Technical Specifications
- Output Current: Up to 1.5A.
- Input Voltage Range: 0.8V to 5.5V.
- Output Voltage Range: 0.8V to 3.6V.
- Output Voltage Accuracy: ±1%.
- PSRR: 85dB @ 1kHz.
- Operating Temperature Range: -40°C to 125°C.
Conclusion
The TPS74801DRCR is a powerful low-dropout linear regulator, offering high precision, low noise, low power consumption, and a flexible adjustable output voltage range, making it an ideal choice for many modern electronic designs. Whether in portable devices, industrial systems, or automotive electronics, it provides a stable and efficient power management solution.
