Overview
The TPS25944ARVCT from Texas Instruments is a highly integrated electronic fuse (eFuse) power multiplexer (MUX) designed to manage power distribution in various electronic systems. This device operates within a wide voltage range of 2.7 V to 18 V, with a maximum voltage of 20 V, making it suitable for controlling many popular DC bus voltages. The TPS25944ARVCT features a low on-resistance (RON) of 42 mΩ and supports adjustable current limits from 0.6 A to 5.3 A, providing robust protection and control over power delivery.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage | 2.7 V to 18 V | V |
| Maximum Voltage | 20 V | V |
| On-Resistance (RON) | 42 mΩ | mΩ |
| Adjustable Current Limit | 0.6 A to 5.3 A (±8%) | A |
| IMON Current Indicator Output | ±8% | % |
| Operating Quiescent Current (IQ) | 200 µA (Typical) | µA |
| Disabled Quiescent Current (IQ) | 15 µA (Typical) | µA |
| Overvoltage and Undervoltage Thresholds | ±2% | % |
| Junction Temperature Range | –40°C to +125°C | °C |
| UL Recognition | UL 2367 Recognized – File No. 169910 | - |
Key Features
- Reverse Current Blocking: Prevents backflow of current.
- 1-µs Reverse Voltage Shutoff: Rapid response to reverse voltage conditions.
- Programmable dV/dt Control: Allows customization of the output voltage ramp rate.
- Power Good and Fault Outputs: Provides status indicators for power and fault conditions.
- Two Overcurrent Fault Response Options:
- TPS25942: Current limit with thermal shutdown.
- TPS25944: 4 ms fault timer followed by shutoff.
- UL60950 Safety Compliance: Ensures safety during single point failure.
- Open-Short ILIM Detection: Detects and responds to open or short circuit conditions in the current limit resistor.
Applications
- Power Path Management: Ideal for managing power distribution in systems with multiple power sources.
- Redundant Power Supply Systems: Ensures reliable power delivery in systems requiring backup power sources.
- PCIe Cards, NICs, and RAID Systems: Suitable for use in high-reliability computing and storage systems.
Q & A
- What is the operating voltage range of the TPS25944ARVCT?
The operating voltage range is 2.7 V to 18 V, with a maximum voltage of 20 V.
- What is the typical on-resistance (RON) of the TPS25944ARVCT?
The typical on-resistance (RON) is 42 mΩ.
- What are the adjustable current limit ranges for the TPS25944ARVCT?
The adjustable current limit ranges from 0.6 A to 5.3 A with a ±8% tolerance.
- Does the TPS25944ARVCT have reverse current blocking capability?
- What are the overcurrent fault response options for the TPS25944ARVCT?
The TPS25944ARVCT has a 4 ms fault timer followed by shutoff.
- Is the TPS25944ARVCT compliant with any safety standards?
- What is the junction temperature range of the TPS25944ARVCT?
The junction temperature range is –40°C to +125°C.
- Does the TPS25944ARVCT have programmable dV/dt control?
- What kind of status indicators does the TPS25944ARVCT provide?
- How does the TPS25944ARVCT detect open or short circuit conditions in the current limit resistor?
