Overview
The TPS74901, produced by Texas Instruments, is a 3A, low-dropout linear regulator designed to provide a robust power management solution for a wide range of applications. This regulator is known for its ultra-low input voltage range of 0.8V to 5.5V and an adjustable output voltage range of 0.8V to 3.6V. It features a low dropout voltage of 120mV at 3A, making it suitable for applications requiring high current and low voltage drop.
The device includes a power-good (PG) output for supply monitoring and sequencing, adjustable start-up in-rush control, and stability with any output capacitor greater than or equal to 2.2µF. The TPS74901 is available in compact packages such as the 3mm × 3mm VSON, 5mm × 5mm VQFN, and DDPAK-7, enhancing its suitability for space-constrained designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | -0.3 | - | 6 | V |
| Output Voltage (VOUT) | 0.8 | - | 3.6 | V |
| Maximum Output Current (IOUT) | - | - | 3A | A |
| Dropout Voltage | - | 120mV | - | mV |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
| Thermal Shutdown Temperature | - | - | 165 | °C |
| Power Supply Rejection Ratio (PSRR) at 1 kHz | - | 60 | - | dB |
| Enable Input High Level (VEN) | 1.1 | - | 5.5 | V |
| PG Trip Threshold (VIT) | 85% | 90% | 94% | %VOUT |
Key Features
- Ultra-low input voltage range: 0.8V to 5.5V
- Adjustable output voltage range: 0.8V to 3.6V
- Low dropout voltage: 120mV (typical) at 3A
- Power-good (PG) output for supply monitoring and sequencing
- Adjustable start-up in-rush control
- Stable with any output capacitor ≥ 2.2µF
- Compact packages: 3mm × 3mm VSON, 5mm × 5mm VQFN, and DDPAK-7
- Active high enable input
- Precision reference and error amplifier delivering 1% to 2% accuracy over line, load, and temperature
Applications
- Network attached storage - enterprise
- Rack servers
- Network interface cards (NIC)
- Merchant network and server power supplies
Q & A
- What is the input voltage range of the TPS74901?
The input voltage range of the TPS74901 is from 0.8V to 5.5V.
- What is the maximum output current of the TPS74901?
The maximum output current of the TPS74901 is 3A.
- What is the typical dropout voltage of the TPS74901 at 3A?
The typical dropout voltage of the TPS74901 at 3A is 120mV.
- Does the TPS74901 have a power-good output?
Yes, the TPS74901 has a power-good (PG) output for supply monitoring and sequencing.
- What types of packages are available for the TPS74901?
The TPS74901 is available in 3mm × 3mm VSON, 5mm × 5mm VQFN, and DDPAK-7 packages.
- What is the operating junction temperature range of the TPS74901?
The operating junction temperature range of the TPS74901 is from -40°C to 125°C.
- Is the TPS74901 stable with any type of output capacitor?
The TPS74901 is stable with any output capacitor greater than or equal to 2.2µF.
- Does the TPS74901 support adjustable start-up in-rush control?
Yes, the TPS74901 supports adjustable start-up in-rush control.
- What is the accuracy of the TPS74901 over line, load, and temperature?
The accuracy of the TPS74901 over line, load, and temperature is 1% for new chips and 2% for legacy chips.
- Can the PG pin be left floating if output monitoring is not necessary?
Yes, the PG pin can be left floating if output monitoring is not necessary.
