Overview
The TPS74901RGWT, manufactured by Texas Instruments, is a 3-A, low-VIN (0.8-V) adjustable ultra-low-dropout voltage regulator. This device offers a robust power management solution for a wide variety of applications, including network attached storage, rack servers, network interface cards (NIC), and merchant network and server power supplies. It features user-programmable soft-start, which minimizes stress on the input power source by reducing capacitive inrush current during start-up. The regulator is designed to power various types of processors and application-specific integrated circuits (ASICs), and it includes an enable input and power-good output for easy sequencing with external regulators.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| VIN Range | 0.8 | - | 5.5 | V |
| VOUT Range | 0.8 | - | 3.6 | V |
| VBIAS Range | 2.7 | - | 5.5 | V |
| Dropout Voltage | - | 120mV | - | mV at 3A |
| Output Current | - | - | 3 | A |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package Types | - | VQFN (5mm × 5mm), VSON (3mm × 3mm), DDPAK-7 | - | - |
| Accuracy over Line, Load, and Temperature | 1% (new chip) | - | 2% (legacy chip) | - |
Key Features
- User-programmable soft-start to minimize stress on the input power source by reducing capacitive inrush current during start-up.
- Power-good (PG) output allows supply monitoring or provides a sequencing signal for other supplies.
- Adjustable start-up in-rush control.
- VBIAS permits low VIN operation with good transient response.
- Stable with any output capacitor ≥ 2.2µF.
- Active high enable input.
- Precision reference and error amplifier delivering high accuracy over load, line, temperature, and process.
- Thermal shutdown protection.
Applications
- Network attached storage - enterprise
- Rack servers
- Network interface cards (NIC)
- Merchant network and server power supplies
- Field-programmable gate arrays (FPGAs)
- Digital signal processors (DSPs)
- Various types of processors and application-specific integrated circuits (ASICs)
Q & A
- What is the input voltage range of the TPS74901RGWT?
The input voltage range is from 0.8V to 5.5V.
- What is the output voltage range of the TPS74901RGWT?
The output voltage range is from 0.8V to 3.6V.
- What is the typical dropout voltage of the TPS74901RGWT at 3A?
The typical dropout voltage is 120mV at 3A.
- What are the package options available for the TPS74901RGWT?
The device is available in VQFN (5mm × 5mm), VSON (3mm × 3mm), and DDPAK-7 packages.
- What is the purpose of the power-good (PG) output?
The power-good output allows supply monitoring or provides a sequencing signal for other supplies.
- How does the user-programmable soft-start feature work?
The user-programmable soft-start minimizes stress on the input power source by reducing capacitive inrush current during start-up, and it is set by a capacitor connected to the soft-start pin.
- What is the operating temperature range of the TPS74901RGWT?
The operating temperature range is from –40°C to 125°C.
- What is the accuracy over line, load, and temperature for the TPS74901RGWT?
The accuracy is 1% for new chips and 2% for legacy chips.
- Is the TPS74901RGWT stable with any type of output capacitor?
Yes, the device is stable with any output capacitor ≥ 2.2µF.
- What is the maximum output current of the TPS74901RGWT?
The maximum output current is 3A.
