Overview
The TPS74201RGWT from Texas Instruments is a 1.5-A, low-VIN (0.8-V), low-noise, high-PSRR (Power Supply Rejection Ratio), adjustable ultra-low-dropout voltage regulator. This device is part of the TPS742 series, which provides an easy-to-use and robust power-management solution for a wide variety of applications. The regulator features a user-programmable soft-start, which minimizes stress on the input power source by reducing capacitive inrush current on start-up. It is particularly well-suited for powering processors, ASICs, FPGAs, and DSPs due to its flexible start-up requirements and sequencing capabilities.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 0.8 to 5.5 | V |
| Output Current | 1.5 | A |
| Output Voltage Range | 0.8 to 3.6 | V |
| Dropout Voltage (Typical) | 55mV (new chip), 60mV (legacy chip) at 1.5A | mV |
| Accuracy over Line, Load, and Temperature | 1% | % |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | VQFN (RGW) with 20 pins | |
| Package Size | 5mm × 5mm | mm |
Key Features
- Input voltage range: 0.8V to 5.5V
- Soft-start (SS) pin provides a linear start-up with ramp time set by external capacitor
- 1% accuracy over line, load, and temperature
- Supports input voltages as low as 0.8V with external bias supply
- Adjustable output (0.8V to 3.6V)
- Ultra-Low Dropout: 55mV (new chip) and 60mV (legacy chip) at 1.5A (typical)
- Stable with any output capacitor ≥ 2.2µF (new chip) and stable with any or no output capacitor (legacy chip)
- Excellent transient response
- Open-drain power-good output
- Active high enable with hysteresis and deglitch
Applications
- Network attached storage - enterprise
- Rack servers
- Network interface cards (NIC)
- Merchant network and server power supplies
- Powering processors, ASICs, FPGAs, and DSPs
Q & A
- What is the input voltage range of the TPS74201RGWT?
The input voltage range is from 0.8V to 5.5V.
- What is the typical dropout voltage of the TPS74201RGWT?
The typical dropout voltage is 55mV for the new chip and 60mV for the legacy chip at 1.5A.
- How does the soft-start feature work?
The soft-start feature provides a linear start-up with a ramp time set by an external capacitor connected to the SS pin.
- What is the accuracy of the output voltage over line, load, and temperature?
The output voltage accuracy is 1% over line, load, and temperature.
- What types of capacitors are supported for stability?
The device is stable with any output capacitor ≥ 2.2µF (new chip) and stable with any or no output capacitor (legacy chip).
- What is the operating temperature range of the TPS74201RGWT?
The operating temperature range is from -40°C to 125°C.
- What is the package type and size of the TPS74201RGWT?
The package type is VQFN (RGW) with 20 pins, and the package size is 5mm × 5mm.
- Does the TPS74201RGWT have power-good and enable features?
Yes, it has an open-drain power-good output and an active high enable pin with hysteresis and deglitch.
- What are some common applications for the TPS74201RGWT?
Common applications include network attached storage, rack servers, network interface cards, and powering various types of processors and ASICs.
- How does the enable pin function?
The enable pin is active high, and it must not be left floating. It has hysteresis and deglitching to avoid ON and OFF cycling due to small glitches in the VEN signal.
