For engineers and procurement professionals who are selecting a 2.7V–23V power rail protection solution or seeking a stable supply of the TPS25970ARPWR, Texas Instruments’ TPS25970 is an integrated electronic fuse (eFuse) worth evaluating as a top priority. The following section explores the product from three perspectives—specifications, features, and typical applications—and includes current supply information from Mingjiada Electronics to facilitate quick technical verification and procurement decisions.
I. Product Overview: What Is the TPS25970?
The TPS25970 belongs to Texas Instruments’ TPS2597xx series of eFuses. It is a circuit protection and power management chip that integrates a low-on-resistance FET, overvoltage protection, overcurrent protection, current monitoring, and surge control into a 2mm × 2mm QFN package. Compared to traditional fuses or discrete protection circuits, the TPS25970 requires only a minimal number of external components to achieve adjustable current limiting, adjustable overvoltage latch-up, output slew rate control, and fault indication, significantly reducing board space and improving protection accuracy.
The device is rated for an operating junction temperature range of –40°C to +125°C, covering both industrial and consumer applications.
II. Key Parameter Quick Reference
The table below summarizes the key electrical and packaging parameters of the TPS25970 series to facilitate product selection and comparison.
Input voltage range: 2.7 V to 23 V
Absolute maximum input voltage: 28 V
Integrated FET On-Resistance (R_ON): 9.8 mΩ (typical)
Continuous Output Current Capability: 7 A
Adjustable Current Limit Range (I_LIM): 0.87 A to 7.7 A
Current Limit Accuracy: ±10% (I_LIM > 1.74 A)
Load Current Monitoring Accuracy: ±8% (maximum)
Short-Circuit Protection Response Time: 550 ns (typical)
Adjustable Overvoltage Lockout (OVLO): Response Time 1.2 μs (typical)
Overvoltage Clamping (OVC): Selectable Thresholds 3.89 V / 5.76 V / 13.88 V (select variants)
Transient Overcurrent Suppression Timer: Adjustable, supports peak currents up to 2 × I_LIM
Package: 10-pin VQFN-HR (2 mm × 2 mm, 0.45 mm pitch)
Operating Junction Temperature: –40°C to +125°C
III. Analysis of Key Features
3.1 Combining Low Power Loss with High Integration
The on-resistance of 9.8 mΩ results in an on-state power loss of approximately 0.48 W at a full load of 7 A, which is significantly lower than most discrete MOSFET solutions, helping to maintain thermal reliability in compact spaces. The integrated FET eliminates the need for external power device selection and layout, reducing BOM complexity and design cycle time.
3.2 Dual Overvoltage Protection Paths
The TPS25970 series offers adjustable overvoltage lockout (OVLO) with a typical response time of just 1.2 μs, making it suitable for optical modules, SSDs, and server standby rails that are sensitive to overvoltage events. The TPS25972x variants in the same series also support pin-selectable overvoltage clamping (OVC), with thresholds fixed at 3.89 V, 5.76 V, or 13.88 V, enabling direct compatibility with common voltage nodes such as USB PD and 12 V buses.
3.3 Precise Current Monitoring and Flexible Overcurrent Response
The ILM pin serves both as the current limit threshold setpoint and as an analog load current monitoring output. Designers can set the current limit point within the 0.87 A–7.7 A range using an external resistor; the analog voltage output from this pin is proportional to the load current, with an accuracy of ±8%, and can be fed directly into an MCU’s ADC for real-time power consumption monitoring. The Transient Immunity Timer (ITIMER) allows the load to draw a peak current of up to 2×I_LIM for a short period without triggering protection, preventing false shutdowns during scenarios such as motor startup or power-up of capacitive loads.
3.4 Fast Short-Circuit Protection and System-Level Reliability
In the event of a short circuit, the TPS25970’s fast-transition comparator can shut off the output within 550 ns (typical), minimizing the impact of short-circuit energy on the load and input bus. Combined with adjustable under-voltage lockout (UVLO), output voltage slew rate control (dVdt), and thermal shutdown, the device provides a comprehensive protection chain covering overvoltage, undervoltage, overcurrent, short circuits, and thermal events. The device is also certified to UL 2367 (File No. E339631) and IEC 62368-1 CB, providing ready-to-use compliance documentation for end-product safety certification.
IV. Typical Application Scenarios
The TPS25970’s 2.7 V–23 V / 7 A specifications enable it to cover multiple application levels, ranging from board-level hot-swapping to port protection in end devices. Key applications include:
Hot-swap and hot-swap control: When boards in servers, industrial PCs, and routers/switches are inserted into the backplane while powered on, the TPS25970 limits inrush current via dVdt slew rate control, preventing bus voltage sags.
Server Standby Power Rails and Add-in Card Input Protection: Rapid shutdown during overcurrent or short-circuit events prevents faulty loads from draining the standby rail or the main input bus.
Enterprise-Class Storage: Power protection for PCIe/SATA SSDs, HDDs, and RAID/HBA/SAN front-end power supplies.
Optical modules and communication boards: 3.3V/5V/12V power supply nodes requiring fast overvoltage response.
Consumer and portable devices: USB/HDMI port protection and battery power path management in smartphones, tablets, and retail POS terminals.
V. Mingjiada Supply Information: TPS25970ARPWR in Stock
Mingjiada Electronics (Shenzhen) currently offers the TPS25970ARPWR model, a variant of the TPS25970 series featuring an adjustable OVLO + active current limit configuration.
Model: TPS25970ARPWR
Brand: Texas Instruments
Package: VQFN-10 (2 mm × 2 mm)
Stock Quantity: 3,000 pieces (brand new, factory-sealed)
Lead Time: In stock
Tags: TPS25970ARPWR, TPS25970ARPW, TPS25970ARP, TPS25970AR, TPS25970A, TPS25970
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