Overview
The TPS74401RGWT, produced by Texas Instruments, is a 3.0-A ultra-low dropout (LDO) linear regulator. This device provides a robust power-management solution for a wide variety of applications, including those requiring precise voltage regulation and sequencing capabilities. The TPS74401 features a user-programmable soft-start, which minimizes stress on the input power source by reducing capacitive inrush current during startup. This regulator is particularly suited for powering processors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs).
Key Specifications
| Specification | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.1 to 5.5 | V |
| Output Voltage Range | 0.8 to 3.6 | V |
| Output Current | 3.0 | A |
| Dropout Voltage (Typical) | 115 mV at 3.0 A | mV |
| Accuracy Over Line, Load, and Temperature | 1% | % |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | 5-mm × 5-mm × 1-mm VQFN (RGW) | |
| Pins | 20 |
Key Features
- Input voltage range: 1.1 V to 5.5 V
- User-programmable soft-start with linear startup, set by an external capacitor
- 1% accuracy over line, load, and temperature
- Supports input voltages as low as 0.9 V with an external bias supply
- Adjustable output voltage: 0.8 V to 3.6 V
- Ultra-low dropout voltage: 115 mV at 3.0 A (typical)
- Stable with any or no output capacitor (legacy chip), or with any output capacitor ≥ 2.2 µF (new chip)
- Excellent transient response
- Open-drain power-good (PG) output for supply monitoring or sequencing
- Enable input for easy sequencing with external regulators
Applications
- Field-programmable gate arrays (FPGAs)
- Digital signal processors (DSPs)
- Network attached storage - enterprise
- Rack servers
- Network interface cards (NIC)
- Merchant network and server power supplies
- Post-regulation applications
- Hot-swap and inrush control applications
Q & A
- What is the input voltage range of the TPS74401RGWT?
The input voltage range is from 1.1 V to 5.5 V.
- What is the typical dropout voltage of the TPS74401RGWT?
The typical dropout voltage is 115 mV at 3.0 A.
- Can the TPS74401RGWT operate without an output capacitor?
- What is the operating temperature range of the TPS74401RGWT?
The operating temperature range is from -40°C to 125°C.
- What is the purpose of the soft-start feature in the TPS74401RGWT?
The soft-start feature minimizes stress on the input power source by reducing capacitive inrush current during startup. It is set by an external capacitor.
- What types of applications is the TPS74401RGWT suited for?
The TPS74401RGWT is suited for applications such as FPGAs, DSPs, network attached storage, rack servers, and network interface cards.
- How does the power-good (PG) output work?
The power-good output is an open-drain signal that indicates the status of VOUT. It goes into a high-impedance state when VOUT exceeds the PG trip threshold and is driven to a low-impedance state when VOUT is below this threshold.
- What is the package type and size of the TPS74401RGWT?
The package type is a 5-mm × 5-mm × 1-mm VQFN (RGW) with 20 pins.
- Can the TPS74401RGWT support input voltages below 1.1 V?
- What is the accuracy of the output voltage over line, load, and temperature?
