Overview
The TPS74201RGWR 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 a robust power-management solution for a wide variety of applications. It features a user-programmable soft-start, which minimizes stress on the input power source by reducing capacitive inrush current on start-up. The regulator is available in a 20-pin VQFN (RGW) package and is fully specified from –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 0.8 to 5.5 | V |
| Output Voltage Range | 0.8 to 3.6 | V |
| Output Current | 1.5 | A |
| Dropout Voltage (typical at 1.5A) | 55mV (new chip), 60mV (legacy chip) | mV |
| Accuracy over Line, Load, and Temperature | 1% | |
| Operating Temperature Range | –40 to 125 | °C |
| Package Type | VQFN (RGW) | |
| Number of Pins | 20 | |
| Thermal Resistance (Junction-to-Ambient) | 34.7 (new chip), 35.4 (legacy chip) | °C/W |
Key Features
- Soft-Start (SS) Pin: Provides a linear start-up with ramp time set by an external capacitor, minimizing stress on the input power source.
- Adjustable Output: Output voltage can be adjusted from 0.8V to 3.6V.
- Ultra-Low Dropout: Dropout voltage as low as 55mV (new chip) or 60mV (legacy chip) at 1.5A.
- Stability with Any Output Capacitor: Stable with any output capacitor ≥ 2.2µF (new chip) or with any or no output capacitor (legacy chip).
- Excellent Transient Response: Superior transient response, especially for low VIN applications.
- Open-Drain Power-Good Output: Allows supply monitoring and sequencing of other supplies.
- Active High Enable: Enable pin with hysteresis and deglitch for reliable operation with slow-ramping signals.
- Internal Current Limit: Factory-trimmed current limit protects against overload conditions and short circuit faults.
Applications
- Network Attached Storage - Enterprise: Suitable for powering storage systems in enterprise environments.
- Rack Servers: Used in server power supplies for data centers.
- Network Interface Cards (NIC): Powers network interface cards in various networking equipment.
- Merchant Network and Server PSU: Applicable in power supplies for merchant network and server systems.
- FPGAs, DSPs, and ASICs: Meets the sequencing requirements of field-programmable gate arrays, digital signal processors, and application-specific integrated circuits.
Q & A
- What is the input voltage range of the TPS74201RGWR?
The input voltage range is from 0.8V to 5.5V.
- What is the maximum output current of the TPS74201RGWR?
The maximum output current is 1.5A.
- What is the dropout voltage of the TPS74201RGWR?
The dropout voltage is typically 55mV (new chip) or 60mV (legacy chip) at 1.5A.
- Is the TPS74201RGWR stable with any output capacitor?
Yes, it is stable with any output capacitor ≥ 2.2µF (new chip) or with any or no output capacitor (legacy chip).
- What is the operating temperature range of the TPS74201RGWR?
The operating temperature range is from –40°C to 125°C.
- What package type is the TPS74201RGWR available in?
The device is available in a 20-pin VQFN (RGW) package.
- Does the TPS74201RGWR have a power-good output?
Yes, it has an open-drain power-good output for supply monitoring and sequencing.
- How does the soft-start feature work on the TPS74201RGWR?
The soft-start feature provides a linear start-up with a ramp time set by an external capacitor, minimizing stress on the input power source.
- What is the purpose of the enable pin on the TPS74201RGWR?
The enable pin is active high and allows the regulator to be enabled or disabled. It has hysteresis and deglitch for reliable operation with slow-ramping signals.
- Does the TPS74201RGWR have internal current limit protection?
Yes, it features a factory-trimmed current limit that protects against overload conditions and short circuit faults.
