Overview
The TPS74201RGRT from Texas Instruments is a highly versatile and robust ultra-low dropout (LDO) linear regulator. This device is part of the TPS742 series, known for its ease of use and comprehensive power management capabilities. It features a 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 support a wide range of applications, including those requiring precise voltage regulation and sequencing.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 0.8 | 5.5 | V | |
| Output Voltage Range | 0.8 | 3.6 | V | |
| Output Current | 1.5 | A | ||
| Dropout Voltage (at 1.5A) | 55 | mV | ||
| Enable Input High Level | 1.1 | 5.5 | V | |
| Enable Input Low Level | 0 | 0.4 | V | |
| Operating Temperature Range | -40 | 125 | °C | |
| Junction-to-Ambient Thermal Resistance (RGW Package) | 34.7 | °C/W |
Key Features
- Programmable Soft-Start: The soft-start (SS) pin allows for a linear start-up with the ramp time set by an external capacitor, reducing capacitive inrush current on start-up.
- Ultra-Low Dropout Voltage: The regulator has a typical dropout voltage of 55mV at 1.5A, ensuring efficient voltage regulation.
- High Accuracy: The device maintains 1% accuracy over line, load, and temperature, ensuring stable output voltage.
- Stable with Any Output Capacitor: The new chip version is stable with any output capacitor greater than or equal to 2.2μF, while the legacy chip is stable with any or no output capacitor.
- Excellent Transient Response: The NMOS-pass FET architecture provides superior transient response, especially for low input voltage applications.
- Power-Good Output and Enable Pin: The device includes an open-drain power-good output and an active high enable pin with hysteresis and deglitching, facilitating easy sequencing with external regulators).
- Internal Current Limit: The regulator features a factory-trimmed current limit that protects against overload conditions and ensures well-controlled recovery from short circuit faults).
Applications
- Network Attached Storage - Enterprise: Suitable for power management in enterprise-level network attached storage systems).
- Rack Servers: Used in the power supply units of rack servers due to its high reliability and performance).
- Network Interface Cards (NIC): Ideal for powering NICs in various network infrastructure devices).
- Merchant Network and Server PSU: Applicable in power supply units for merchant networks and servers).
Q & A
- What is the input voltage range of the TPS74201RGRT?
The input voltage range is from 0.8V to 5.5V).
- What is the typical dropout voltage at 1.5A?
The typical dropout voltage at 1.5A is 55mV).
- How does the soft-start feature work?
The soft-start feature allows for a linear start-up with the ramp time set by an external capacitor connected to the SS pin, reducing capacitive inrush current on start-up).
- What is the operating temperature range of the TPS74201RGRT?
The operating temperature range is from -40°C to 125°C).
- Is the regulator stable with any output capacitor?
Yes, the new chip version is stable with any output capacitor greater than or equal to 2.2μF, while the legacy chip is stable with any or no output capacitor).
- What is the purpose of the power-good output and enable pin?
The power-good output allows for supply monitoring, and the enable pin with hysteresis and deglitching facilitates easy sequencing with external regulators).
- How does the internal current limit protect the device?
The internal current limit protects against overload conditions and ensures well-controlled recovery from short circuit faults).
- What are some common applications of the TPS74201RGRT?
Common applications include network attached storage, rack servers, network interface cards, and merchant network and server power supply units).
- What is the typical enable input high level voltage?
The typical enable input high level voltage is between 1.1V and 5.5V).
- How does the NMOS-pass FET architecture benefit the regulator?
The NMOS-pass FET architecture provides superior transient response, especially for low input voltage applications, and ensures stability with a wide range of output capacitors).
