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Texas Instruments TPS2551DBVTG4
- Part No.:
- TPS2551DBVTG4
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
TPS2551DBVTG4.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,151
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Product details
Overview
TPS2551DBVTG4 from Texas Instruments is a single-channel, active-high enable, adjustable current-limited high-side power-distribution switch featuring a 94-mΩ N-channel MOSFET in SOT-23-6 package. It operates from 2.5 V to 6.5 V input, delivers up to 1.1 A continuous load current, and responds to overcurrent events in 2 μs - designed for USB port protection and heavy capacitive load switching.
For engineers reviewing the TPS2551DBVTG4 datasheet, TPS2551DBVTG4 pinout, TPS2551DBVTG4 application, or TPS2551DBVTG4 equivalent, key selection criteria include active-high EN logic, reverse-voltage protection threshold (135 mV typ), deglitched FAULT reporting (4–7.5 ms), thermal shutdown at 135°C/155°C, and external current-limit resistor programming range (14.3 kΩ–80.6 kΩ).
Technical Context
The TPS2551DBVTG4 integrates an internal charge pump to drive the N-channel MOSFET gate above the source, enabling full enhancement down to 2.5 V input. Its current-limit architecture distinguishes between peak DC overcurrent (IOC) and short-circuit current (IOS), with independent deglitch timers (7.5 ms for overcurrent, 4 ms for reverse-voltage) preventing false FAULT assertions during capacitive inrush.
Reverse-voltage protection activates when VOUT exceeds VIN by ≥135 mV for ≥4 ms, disabling the MOSFET to protect upstream circuitry. The FAULT pin is open-drain, asserted low during overcurrent, overtemperature, or reverse-voltage faults - with immediate response for thermal events and deglitched behavior for electrical faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6.5 V - supports USB 5 V and low-voltage embedded rails without external regulation |
| Current-Limit Range | 100 mA to 1100 mA - set externally via RILIM (14.3 kΩ–80.6 kΩ), enabling precise load matching |
| rDS(on) | 94 mΩ (typ, 25°C) - minimizes power loss and self-heating at 1 A (≤94 mW conduction loss) |
| Overcurrent Response Time | 2 μs (typ) - enables fast fault containment before downstream components are stressed |
| Reverse-Voltage Threshold | 135 mV (typ) - prevents backfeed damage to upstream supplies or controllers when output is forced high |
| Standby Supply Current | 1 μA (max) - supports ultra-low-power system sleep modes without compromising protection readiness |
| Junction Temperature Range | –40°C to 125°C - qualified for industrial and portable applications with ambient extremes |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body), thermally enhanced with PowerPAD™ internally connected to GND for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power input | Accepts 2.5–6.5 V supply; requires ≥0.1 μF ceramic decoupling capacitor placed adjacent to pin |
| OUT | Switched power output | Drives load through internal N-MOSFET; voltage follows IN when enabled, clamped during fault |
| EN | Active-high enable control | Logic high (≥1.1 V) enables switch; logic low disables with <1 μA quiescent draw |
| FAULT | Open-drain fault indicator | Asserts low during overcurrent, reverse-voltage, or overtemperature; requires external pull-up |
| ILIM | Current-limit programming input | Connects to GND via external resistor (14.3–80.6 kΩ) to set IOC and IOS thresholds |
| GND | Ground reference | Primary signal and power return; tied internally to PowerPAD™ for thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| Built-in soft-start | Controlled rise/fall times (0.65–1.5 ms) limit inrush current into large capacitive loads |
| Deglitched fault reporting | 7.5-ms overcurrent and 4-ms reverse-voltage deglitch prevent false FAULT during normal transients |
| Reverse input-output protection | Automatic MOSFET disable when VOUT > VIN + 135 mV protects upstream USB hosts or PMICs |
| Thermal foldback & shutdown | Two-tier protection: current-limit thermal cutoff at 135°C and hard shutdown at 155°C with 15°C hysteresis |
| UL certification | UL listed (File E169910) - meets safety requirements for end-equipment compliance |
Applications
| USB Downstream Port Protection | Cell Phone Peripheral Power Switching |
|---|---|
Use Scenario: Protecting USB Type-A or Type-C downstream ports against short circuits, hot-plug inrush, and reverse-current faults. IC Role / Device Role / Timing Role: High-side power switch with active-high enable synchronized to USB enumeration and suspend/resume states. Use Value: Prevents host port damage and bus voltage collapse during cable shorts or faulty peripherals while maintaining UL-compliant isolation. | Use Scenario: Controlling power to USB OTG accessories, card readers, or docking interfaces in smartphones and tablets. IC Role / Device Role / Timing Role: Load switch enabling/disabling peripheral rails under AP control with sub-μA standby current. Use Value: Extends battery life via zero-load leakage (<1 μA) and avoids brownouts during accessory insertion with 2-μs fault response. |
| Laptop USB Hub Power Management | Industrial USB-C Power Delivery Sink Protection |
Use Scenario: Distributing regulated 5 V to multi-port USB hubs where individual port current must be limited and monitored. IC Role / Device Role / Timing Role: Per-port current-limited switch with FAULT feedback to hub controller for intelligent port disable. Use Value: Enables per-port current budgeting (e.g., 900 mA/port) and automatic fault isolation without software intervention. | Use Scenario: Safeguarding USB-C PD sink inputs against reverse feed from powered cables or miswired adapters. IC Role / Device Role / Timing Role: Reverse-voltage protected high-side switch placed between PD controller and system rail. Use Value: Blocks >135 mV reverse potential within 4 ms, protecting PD controller ICs and preventing latch-up on shared VBUS lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-limited power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2553DBVR | Same SOT-23-6 package, identical rDS(on) and current range, but features active-low EN and no reverse-voltage protection | Requires inverted enable logic; unsuitable where reverse feed risk exists (e.g., USB OTG, shared VBUS) | Select only if active-low control is preferred and reverse-voltage conditions are absent or externally managed |
| AP22653AW5-7 | Active-high EN, 85-mΩ rDS(on), 0.5–5 A adjustable limit, but lacks reverse-voltage protection and has slower 10-μs fault response | Higher current capability suits larger loads, but missing reverse protection limits use in bidirectional USB or hot-swap scenarios | Prefer when higher current (>1.1 A) or lower conduction loss is critical, and reverse voltage is not a design concern |
Compared with TPS2551DBVTG4, TPS2553DBVR offers identical performance except for EN polarity and missing reverse-voltage protection - making it a functional alternative only in unidirectional systems. AP22653AW5-7 provides wider current range and lower rDS(on) but trades off critical USB-safe reverse protection and ultrafast fault response.
Availability
TPS2551DBVTG4 is available at Aetrix Electronics and suitable for USB port protection, cell phone peripheral switching, and laptop hub power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2551DBVTG4 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.
The TPS255x family is engineered for robust power distribution in USB and portable electronics, emphasizing fast fault response, programmable current limiting, and integrated protection features to simplify board-level power architecture.
FAQ
What is the enable logic polarity of the TPS2551DBVTG4?
The TPS2551DBVTG4 uses active-high enable logic: the internal power switch turns on when the EN pin voltage exceeds 1.1 V (VIH), and turns off when EN falls below 0.66 V (VIL). This differs from the TPS2550DBVTG4, which uses active-low enable. The TPS2551DBVTG4's EN pin draws less than 0.5 μA in either state, supporting direct interface with microcontroller GPIOs without level-shifting.
How does the TPS2551DBVTG4 implement reverse-voltage protection?
The TPS2551DBVTG4 monitors the voltage difference between OUT and IN using an internal comparator. When VOUT exceeds VIN by ≥135 mV (typical) for ≥4 ms, the device disables the N-channel MOSFET to block reverse current flow. This protects upstream sources such as USB hosts or PMICs from backfeed damage. The FAULT pin asserts low simultaneously, and the MOSFET re-enables only after VOUT falls below VIN for the same 4-ms deglitch period.
What is the minimum and maximum value for the ILIM resistor in the TPS2551DBVTG4?
The TPS2551DBVTG4 requires an external resistor (RILIM) from the ILIM pin to GND within 14.3 kΩ to 80.6 kΩ. At 14.3 kΩ, the typical current-limit threshold (IOC) is ~1.7 A and short-circuit current (IOS) is ~1.45 A; at 80.6 kΩ, IOC drops to ~365 mA and IOS to ~265 mA. Values outside this range risk inaccurate current limiting or failure to enter constant-current mode.
Does the TPS2551DBVTG4 require an external capacitor on the IN pin?
Yes - the TPS2551DBVTG4 requires a minimum 0.1 μF ceramic capacitor connected between the IN pin and GND, placed as close as possible to the device. This capacitor stabilizes the input supply during fast load transients and ensures reliable operation of the internal charge pump. Larger values (e.g., 1–10 μF) may be added in parallel for improved bulk decoupling in high-capacitance load applications.
What thermal protection mechanisms does the TPS2551DBVTG4 include?
The TPS2551DBVTG4 incorporates dual thermal protection: first, current-limit thermal foldback triggers at 135°C (typical) when operating in constant-current mode; second, absolute thermal shutdown activates at 155°C (typical) regardless of operating mode. Both thresholds include ~15°C hysteresis. When triggered, the device cycles on/off until the fault is removed, and the FAULT pin asserts low immediately during overtemperature events - with no deglitch delay.
TPS2551DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 2.5V ~ 6.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 1.1A
- Rds On (Typ):
- 85mOhm
- Input Type:
- Non-Inverting
- Features:
- Slew Rate Controlled
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS2551DBVTG4 FAQ
1.How can I place an order for TPS2551DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2551DBVTG4 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 TPS2551DBVTG4 reliable?
The price and inventory of TPS2551DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2551DBVTG4 is usually 5 days.
3.What payment methods are accepted for TPS2551DBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2551DBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2551DBVTG4?
TPS2551DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2551DBVTG4 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 TPS2551DBVTG4?
For technical support, including TPS2551DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2551DBVTG4 requirements.
6.How does Aetrix verify that TPS2551DBVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS2551DBVTG4 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 TPS2551DBVTG4 meets industry standards.
7.What is the process for return or replacement of TPS2551DBVTG4?
All TPS2551DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2551DBVTG4, 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 TPS2551DBVTG4 part is unused and in its original packaging.
Return procedure for TPS2551DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS2551DBVTG4 Tags
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