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Texas Instruments TPS2051ADR
- Part No.:
- TPS2051ADR
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2051ADR.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,358
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Product details
Overview
TPS2051ADR from Texas Instruments is a single-channel, high-side N-channel MOSFET power-distribution switch with 80-mΩ on-resistance, 500 mA continuous current rating, active-high enable logic, and integrated thermal/short-circuit protection. It operates from 2.7 V to 5.5 V and delivers controlled inrush current for USB-powered peripherals and hot-swap applications.
For engineers reviewing the TPS2051ADR datasheet, TPS2051ADR pinout, TPS2051ADR application, or TPS2051ADR equivalent, this device is selected for low-standby-current (≤10 µA), bidirectional switching capability, precise 0.9 A current-limit threshold, and SOIC-8 packaging compatible with automated PCB assembly.
Technical Context
The TPS2051ADR integrates an internal charge pump enabling gate drive above the input rail-critical for full enhancement of its N-channel high-side switch across the 2.7–5.5 V input range. Its driver circuit enforces 2.5-ms typical rise time to suppress EMI during capacitive load switching.
Overcurrent detection uses a sense FET (not external resistor), triggering open-drain OC output low upon exceeding 0.9 A at 25°C. Thermal protection employs dual-threshold shutdown (~140°C trip, ~120°C recovery) per channel, allowing fault isolation without disabling adjacent rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel count | Single high-side switch - supports independent control of one power rail. |
| Continuous current | 500 mA per channel - sufficient for USB 2.0 downstream ports and low-power embedded modules. |
| On-resistance | 80 mΩ at 5 V - limits voltage drop to ≤40 mV at 500 mA, minimizing power loss and self-heating. |
| Enable logic | Active-high - compatible with standard microcontroller GPIOs without level-shifting. |
| Current limit | 0.9 A typical short-circuit threshold - provides robust overload margin above rated 500 mA load. |
| Standby current | ≤10 µA - enables ultra-low-power system sleep modes without rail leakage concerns. |
| Rise time | 2.5 ms typical - controls inrush dv/dt to prevent supply sag and EMI in shared 5 V domains. |
Pinout & Package
TPS2051ADR is housed in an 8-pin SOIC (D) package with exposed pad for thermal dissipation. Pin numbering follows standard D-package top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Common return path for internal charge pump, driver, and thermal sensing circuits. |
| IN (Pins 2,3) | Input voltage supply | Dual-pin parallel connection reduces trace resistance and improves current handling for 500 mA operation. |
| EN (Pin 4) | Enable input | Active-high logic control; drives internal bias circuits only when asserted - enables <10 µA standby. |
| OC (Pin 5) | Overcurrent flag output | Open-drain signal pulled low during overcurrent or thermal fault - requires external pull-up for host MCU monitoring. |
| OUT (Pins 6,7,8) | Switched output | Three-pin parallel connection lowers effective output impedance and enhances thermal spreading for 500 mA loads. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full N-MOSFET enhancement down to 2.7 V input - eliminates need for external high-side driver ICs or P-MOS alternatives. |
| Bidirectional blocking | Prevents reverse current flow from OUT to IN - protects upstream supplies during hot-plug events or load faults. |
| Independent thermal shutdown | Per-channel trip at ~140°C with ~20°C hysteresis - isolates faulted rail while preserving operation of other channels in multi-switch systems. |
| Undervoltage lockout (UVLO) | Disables switch below ~2.0 V - prevents erratic behavior during brown-out conditions and ensures clean power-up sequencing. |
| ESD protection | 2 kV HBM - meets industrial handling requirements without additional external TVS components. |
Applications
| USB Peripheral Power Switching | Industrial I/O Module Protection |
|---|---|
Use Scenario: Powering USB 2.0 hubs, keyboards, or flash drives from a shared 5 V rail with inrush current limiting. IC Role / Device Role / Timing Role: High-side distribution switch controlling power delivery timing and enforcing current limits during plug-in events. Use Value: Prevents host supply collapse during hot-plug by limiting peak inrush to <0.9 A and holding constant current during shorts. | Use Scenario: Protecting programmable logic controller (PLC) digital output channels driving solenoids or indicators. IC Role / Device Role / Timing Role: Fault-isolating power switch with fast OC response (<100 µs) and thermal autonomy per channel. Use Value: Enables individual channel shutdown without affecting other outputs - critical for maintaining system uptime in field-deployed equipment. |
| Embedded System Hot-Swap | Point-of-Load (POL) Sequencing |
Use Scenario: Adding/removing daughterboards or sensor modules in battery-powered edge devices without powering down main MCU. IC Role / Device Role / Timing Role: Controlled power ramp generator with 2.5-ms rise time and OC feedback for safe live insertion. Use Value: Eliminates contact arcing and voltage transients - extends connector life and avoids MCU resets during module swaps. | Use Scenario: Sequencing power to FPGA I/O banks or analog front-ends requiring staggered enable timing. IC Role / Device Role / Timing Role: Independent enable-controlled switch enabling precise turn-on delay via RC network on EN pin. Use Value: Supports custom power-up order without dedicated sequencer IC - reduces BOM count and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2041ADR | Active-low enable logic; otherwise identical electrical specs and pinout. | Requires inverted control signal - unsuitable where MCU GPIOs lack inversion capability or spare inverters. | Select TPS2041ADR only when system-level enable logic is naturally active-low and board layout cannot accommodate signal inversion. |
| AP2171SG-13 | 500 mA rating, 110 mΩ RDS(on), active-high enable, but no OC output or thermal shutdown. | Lacks fault reporting and autonomous thermal protection - demands external monitoring circuitry for safety-critical use. | Choose AP2171SG-13 only for cost-sensitive, non-fault-tolerant applications where OC feedback and thermal autonomy are not required. |
Compared with TPS2041ADR and AP2171SG-13, the TPS2051ADR uniquely combines active-high enable, integrated OC flag, and per-channel thermal shutdown in SOIC-8 - making it optimal for designs requiring both simplicity and robust fault management without added components.
Availability
TPS2051ADR is available at Aetrix Electronics and suitable for USB peripheral power management, industrial I/O protection, and embedded hot-swap applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS2051ADR 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 solutions for industrial, automotive, and consumer markets.
The TPS205x family was designed specifically for current-limited, high-side power distribution in systems vulnerable to heavy capacitive loads and short circuits - targeting USB, docking stations, and modular electronics.
FAQ
What is the maximum continuous current rating for the TPS2051ADR?
The TPS2051ADR is rated for 500 mA continuous output current per channel under recommended operating conditions (TA ≤ 85°C, proper PCB copper area). Its current-limit threshold is 0.9 A typical, providing headroom for transient surges without immediate shutdown. Derating applies above 70°C ambient, and thermal shutdown activates if junction temperature exceeds ~140°C during sustained overload.
Does the TPS2051ADR support bidirectional current flow?
No, the TPS2051ADR is a unidirectional high-side switch configured to allow current flow only from IN to OUT. Its N-channel MOSFET architecture and internal driver prevent reverse conduction - ensuring load isolation when disabled and blocking backfeed from downstream circuits into the supply rail.
How does the OC (overcurrent) pin function on the TPS2051ADR?
The OC pin on the TPS2051ADR is an open-drain output that pulls low during overcurrent or thermal fault conditions. It remains asserted until the fault is cleared and the device recovers. An external pull-up resistor (typically 10 kΩ to VCC) is required to interface with MCU GPIOs for real-time fault monitoring and system-level response.
What is the purpose of the dual IN and OUT pins on the TPS2051ADR?
The TPS2051ADR uses Pins 2 & 3 for IN and Pins 6, 7 & 8 for OUT to reduce effective trace resistance and improve thermal dissipation. This parallel pin configuration lowers voltage drop and junction temperature rise at 500 mA, supporting reliable operation in compact layouts without forced air cooling or oversized copper pours.
Can the TPS2051ADR operate from a 3.3 V supply?
Yes, the TPS2051ADR operates across 2.7 V to 5.5 V, including 3.3 V nominal supplies. At 3.3 V, its typical RDS(on) increases to 90–125 mΩ (depending on temperature), resulting in ~62.5 mV drop at 500 mA. The internal charge pump ensures full gate drive, and rise time extends to ~3 ms - still within safe inrush control limits for most 3.3 V systems.
TPS2051ADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- 80mOhm
- Input Type:
- Non-Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS2051ADR FAQ
1.How can I place an order for TPS2051ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2051ADR 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 TPS2051ADR reliable?
The price and inventory of TPS2051ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2051ADR is usually 5 days.
3.What payment methods are accepted for TPS2051ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2051ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2051ADR?
TPS2051ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2051ADR 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 TPS2051ADR?
For technical support, including TPS2051ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2051ADR requirements.
6.How does Aetrix verify that TPS2051ADR is sourced from the original manufacturer or authorized distributors?
All TPS2051ADR 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 TPS2051ADR meets industry standards.
7.What is the process for return or replacement of TPS2051ADR?
All TPS2051ADR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2051ADR, 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 TPS2051ADR part is unused and in its original packaging.
Return procedure for TPS2051ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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