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Texas Instruments TPS259470LRPWR
- Part No.:
- TPS259470LRPWR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-VFQFN
- Datasheet:
-
TPS259470LRPWR.pdf
- Description:
- IC ELECTRONIC FUSE 10VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,376
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Product details
Overview
TPS259470LRPWR from Texas Instruments is a 2.7V–23V, 5.5A eFuse with true reverse current blocking, integrated back-to-back FETs (RON = 28.3mΩ typ), latch-off overcurrent response, and input reverse polarity protection down to –15V. It delivers fast short-circuit protection (500ns typ), adjustable current limit (0.5A–6A), and digital fault indication (FLT) for high-reliability power path control in USB PD and server applications.
For engineers reviewing the TPS259470LRPWR datasheet, TPS259470LRPWR pinout, TPS259470LRPWR application, or TPS259470LRPWR equivalent, key selection criteria include its latch-off fault behavior, AUXOFF priority MUX control, ±10% ILIM accuracy above 1A, and QFN 2mm × 2mm HotRod™ package with thermal resistance of 41.7°C/W (custom PCB).
Technical Context
The TPS259470LRPWR implements a linear ORing scheme using integrated back-to-back N-channel MOSFETs to achieve near-zero DC reverse current and ideal diode behavior with <17mV forward drop at 10mA. Its reverse current blocking activates within 1µs when VOUT–VIN exceeds –29.3mV (typ), and it sustains –15V input without damage.
It features latch-off overcurrent response (vs auto-retry), fixed 22.2A fast-trip threshold, and user-configurable ILIM via RILM (549Ω–6.65kΩ). The device uses an internal 1.2µs OVLO comparator and supports external dVdt capacitor-based slew rate control (0.5–44.8V/ms range) for inrush management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 23V operating; withstands –15V reverse polarity - enables robust adapter input and hot-swap protection. |
| Continuous Current Rating | 5.5A max at TJ ≤ 125°C - supports high-power USB PD 3.0 and server board rails. |
| On-Resistance (RON) | 28.3mΩ typical (25°C); up to 45mΩ across –40°C to 125°C - minimizes conduction loss and self-heating. |
| Overcurrent Response | Latch-off mode (non-auto-retry) - ensures system shutdown on persistent overload, critical for safety-critical loads. |
| Short-Circuit Response Time | 500ns typical - prevents catastrophic failure during low-impedance faults. |
| Fault Indication | Active-low open-drain FLT pin - provides direct hardware interrupt to host controller upon overcurrent, overvoltage, or thermal fault. |
| Package | 10-pin HotRod™ QFN, 2mm × 2mm, 0.45mm pitch - enables compact layout and 41.7°C/W junction-to-ambient thermal performance on custom 4-layer PCB. |
Pinout & Package
TPS259470LRPWR is housed in a thermally enhanced 10-pin HotRod™ QFN package (2mm × 2mm, 0.45mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; pins are numbered counter-clockwise starting from top-left corner in top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 5) | Power Input | Main supply connection; accepts 2.7V–23V and tolerates –15V reverse voltage - serves as primary power rail entry point. |
| OUT (Pin 6) | Power Output | Protected output to load; blocks reverse current flow at all times - isolates downstream circuitry during input failure. |
| EN/UVLO (Pin 1) | Enable / UVLO Input | Active-high enable with adjustable undervoltage lockout (1.20V typ rising threshold) - prevents turn-on below safe input voltage. |
| OVLO (Pin 2) | Overvoltage Lockout Input | Resistor-divider input setting adjustable OVLO threshold (1.20V typ) - triggers immediate latch-off if VIN exceeds programmed level. |
| AUXOFF (Pin 3) | Priority MUX Control Output | Open-drain signal asserted high after successful inrush - enables coordinated switchover in dual-supply priority MUX systems. |
| FLT (Pin 4) | Fault Indicator Output | Active-low open-drain fault flag - pulls low on overcurrent, overvoltage, or thermal shutdown; requires external pull-up. |
| ILM (Pin 9) | Current Limit & Monitor | Analog pin setting ILIM threshold (via RILM) and outputting 182µA/A current monitor signal - enables precise load current sensing and limiting. |
| ITIMER (Pin 10) | Overcurrent Blanking Timer | Capacitor-connected node delaying fault response to allow controlled inrush peaks up to 2×ILIM - prevents nuisance tripping. |
| dVdt (Pin 7) | Slew Rate Control | Capacitor-to-GND node controlling output rise time (0.5–44.8V/ms) - manages inrush current and EMI during power-up. |
| GND (Pin 8) | Ground Reference | System ground return for all internal circuits and thermal pad - must be low-impedance connection for thermal and electrical stability. |
Key Features
| Feature | Design Value |
|---|---|
| True Reverse Current Blocking | Back-to-back FET architecture blocks reverse current at all times, enabling safe ORing and hold-up capacitor retention during input loss. |
| Latch-Off Overcurrent Protection | Permanently disables output on fault until EN is cycled - eliminates uncontrolled auto-retry in safety-critical or high-energy systems. |
| Input Reverse Polarity Protection | Withstands –15V applied to IN while OUT is grounded - protects against miswired adapters or battery reversal in portable equipment. |
| Adjustable Output Slew Rate | External capacitor on dVdt pin sets turn-on slew rate from 0.5V/ms to 44.8V/ms - balances inrush control and startup speed. |
| Dual-Function ILM Pin | Single pin configures current limit (RILM) and outputs analog current monitor (±6% accuracy ≥1A) - reduces BOM count and routing complexity. |
| Priority Power MUX Support | AUXOFF pin signals auxiliary channel readiness - enables seamless handoff between primary and backup supplies in redundant systems. |
Applications
| USB PD Source Protection | Server Board Power MUX |
|---|---|
|
Use Scenario: Protecting USB-C ports on notebooks and docks from input overvoltage, reverse polarity, and short circuits during hot-plug events. IC Role / Device Role / Timing Role: Primary eFuse on VBUS line; provides 500ns short-circuit response and latch-off behavior to prevent bus collapse. Use Value: Enables UL 2367–recognized, IEC 62368-1–compliant USB PD designs with no external reverse-blocking diode required. |
Use Scenario: Managing dual-input power paths (e.g., AC adapter + battery) on server motherboards with automatic priority switchover. IC Role / Device Role / Timing Role: Primary power path controller with AUXOFF coordination signal for auxiliary eFuse sequencing. Use Value: Eliminates need for discrete ideal diodes and timing controllers; supports seamless failover with sub-50µs RCB recovery. |
| Enterprise Storage RAID Controller | Patient Monitoring Equipment |
|
Use Scenario: Safeguarding 12V/5.5A power rails feeding RAID/HBA cards against inrush, overcurrent, and reverse feed from hot-swap drives. IC Role / Device Role / Timing Role: High-current eFuse with 28.3mΩ RON and ±10% ILIM accuracy - maintains stable rail under dynamic load steps. Use Value: Reduces power loss and thermal stress vs discrete solutions; supports 125°C junction operation for dense storage enclosures. |
Use Scenario: Isolating medical-grade 5V/3.3V subsystems in patient monitors from main power supply faults and ESD transients. IC Role / Device Role / Timing Role: Safety-isolated power path with latch-off fault response and 154°C thermal shutdown - meets IEC 62368-1 requirements. Use Value: Prevents cascading failures in life-critical devices; FLT output directly interfaces with system watchdog and alarm logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar eFuse applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS259470ARPWR | Auto-retry (not latch-off) overcurrent response; same pinout and RON. | Suitable for non-safety-critical systems where automatic recovery after transient overload is acceptable. | Select TPS259470ARPWR only if fault persistence is unlikely and system-level retry logic is not required. |
| TPS259421ARVCR | Lower 2.5A rating, 32mΩ RON, no reverse polarity support, 6-pin WSON package. | Targeted at space-constrained, lower-power applications without reverse-voltage exposure. | Choose TPS259421ARVCR only for cost-sensitive, low-current (<2.5A), single-supply designs lacking reverse-polarity risk. |
Compared with TPS259470ARPWR and TPS259421ARVCR, the TPS259470LRPWR uniquely combines latch-off fault behavior, –15V reverse polarity tolerance, and 5.5A/28.3mΩ performance in a 2mm × 2mm footprint - making it optimal for high-reliability USB PD, server, and medical power paths requiring guaranteed shutdown on fault.
Availability
TPS259470LRPWR is available at Aetrix Electronics and suitable for USB PD protection, server motherboard power MUX, and enterprise storage RAID controller applications requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for TPS259470LRPWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity technologies with emphasis on reliability, efficiency, and system-level integration.
The TPS25947xx family was designed specifically for high-density, high-reliability power path protection in computing, storage, and medical systems - integrating reverse blocking, precision current limiting, and fault signaling into a single HotRod™ QFN package.
FAQ
What is the overcurrent protection behavior of the TPS259470LRPWR?
The TPS259470LRPWR uses latch-off overcurrent protection: when output current exceeds the programmed ILIM threshold (set via RILM), the device permanently disables the power path until the EN pin is cycled low-then-high. This differs from auto-retry variants and ensures definitive shutdown for safety-critical loads. The TPS259470LRPWR also includes a fixed 22.2A fast-trip threshold with 500ns response time for hard shorts.
Does the TPS259470LRPWR support reverse polarity protection on the input?
Yes, the TPS259470LRPWR withstands –15V applied to the IN pin while OUT is grounded, per absolute maximum ratings. This reverse polarity capability is intrinsic to its back-to-back FET architecture and does not require external components. It is validated across the full –40°C to +125°C junction temperature range and supports robust adapter input protection in field-deployed systems.
How is the output slew rate controlled on the TPS259470LRPWR?
The TPS259470LRPWR uses the dVdt pin (Pin 7) for adjustable output slew rate control: connecting a capacitor from dVdt to GND slows the output rise time, with typical values ranging from 0.5V/ms (3300pF) to 44.8V/ms (no capacitor). This feature directly manages inrush current into large load capacitances and reduces EMI during power-up, without requiring external gate drivers or RC networks.
What is the function of the AUXOFF pin on the TPS259470LRPWR?
The AUXOFF pin (Pin 3) is an open-drain output that asserts high after the TPS259470LRPWR completes its inrush sequence and confirms stable output voltage. It is used to coordinate priority switchover in dual-supply MUX configurations - for example, enabling an auxiliary eFuse only after the primary rail is fully established. This eliminates cross-conduction and ensures clean handoff between power sources.
What certifications apply to the TPS259470LRPWR?
The TPS259470LRPWR carries UL 2367 recognition (File No. E339631) and IEC 62368-1 CB certification. These attest to its compliance with end-equipment safety standards for information technology and audio/video equipment, including insulation, flammability, and fault-condition robustness. Certification applies to the device itself, not system-level implementation.
TPS259470LRPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Electronic Fuse
- Sensing Method:
- -
- Accuracy:
- -
- Voltage - Input:
- 2.7V ~ 23V
- Current - Output:
- 5.5A
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VQFN-HR (2x2)
TPS259470LRPWR FAQ
1.How can I place an order for TPS259470LRPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS259470LRPWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS259470LRPWR reliable?
The price and inventory of TPS259470LRPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS259470LRPWR is usually 5 days.
3.What payment methods are accepted for TPS259470LRPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS259470LRPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS259470LRPWR?
TPS259470LRPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS259470LRPWR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS259470LRPWR?
For technical support, including TPS259470LRPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS259470LRPWR requirements.
6.How does Aetrix verify that TPS259470LRPWR is sourced from the original manufacturer or authorized distributors?
All TPS259470LRPWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS259470LRPWR meets industry standards.
7.What is the process for return or replacement of TPS259470LRPWR?
All TPS259470LRPWR units undergo pre-shipment inspection (PSI). If there is an issue with TPS259470LRPWR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS259470LRPWR part is unused and in its original packaging.
Return procedure for TPS259470LRPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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