My Inquiry
My Account
Texas Instruments TPS65280RGER
- Part No.:
- TPS65280RGER
- Manufacturer:
- Texas Instruments
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS65280RGER.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,954
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS65280RGER from Texas Instruments is a dual-channel power distribution switch and monolithic synchronous buck regulator IC designed for USB power management in digital TV, set-top boxes, VoIP phones, and tablet PCs. It delivers a fixed 5-V ±1% output at up to 4-A continuous load from a 5.5–18-V input, integrates two independent 1.2-A (typ) current-limited N-channel switches with 80-mΩ on-resistance, and features latch-off over-current protection and reverse-voltage shutdown.
For engineers reviewing the TPS65280RGER datasheet, TPS65280RGER pinout, TPS65280RGER application, or TPS65280RGER equivalent, this page provides verified technical context, validated pin functions, confirmed switching frequency programmability (300 kHz–1.4 MHz), thermal shutdown behavior (160°C trip), and real-world USB port protection implementation details - all directly extracted from TI's SLVSBE4A datasheet.
Technical Context
The TPS65280RGER combines two independent current-limiting power switches with a fixed-output synchronous buck converter in a single 24-pin QFN package. Each switch uses back-to-back N-MOSFETs (80-mΩ typical RDS(on)) with cycle-by-cycle current limiting, 4-ms reverse-voltage detection, and active-low nFAULT1/nFAULT2 fault signaling.
The integrated buck operates in peak-current-mode control with programmable switching frequency (via ROSC pin), internal 1-ms soft-start, and built-in 5-V feedback divider (420 kΩ/80 kΩ). Its high-side and low-side MOSFETs exhibit 80-mΩ and 50-mΩ on-resistance respectively at V7V = 6.25 V and VIN = 12 V, enabling >90% efficiency at mid-load under 12-V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range (buck) | 5.5 V to 18 V - supports common intermediate bus rails (9 V, 12 V, 15 V) without external pre-regulation. |
| Fixed output voltage | 5 V ±1% - internally trimmed via 420 kΩ/80 kΩ resistor divider; no external feedback required. |
| Max continuous output current | 4 A - delivered by integrated synchronous buck stage with 80-mΩ HS / 50-mΩ LS MOSFETs. |
| Power switch current limit | 1.2 A (typ), with factory-trim options of 0.8 A / 1.6 A / 2 A - enables precise USB port compliance. |
| Switching frequency range | 300 kHz to 1.4 MHz - adjustable via ROSC pin resistor; default 600 kHz when floating or tied to V7V. |
| Thermal shutdown threshold | 160°C (rising), 20°C hysteresis - protects both buck and switches during sustained overload or short circuit. |
| ESD rating (SW_OUT pins) | 4-kV HBM, 200-V MM - meets robustness requirements for USB-facing power delivery paths. |
Pinout & Package
TPS65280RGER is housed in a thermally enhanced 24-lead QFN (RGE) package measuring 4 mm × 4 mm with an exposed thermal pad. The pad must be soldered to PCB ground for optimal thermal performance (θJCbot = 6.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Buck enable input | Logic-high enables entire device; pulling below 0.4 V shuts down buck and switches, reducing quiescent current to ~7 µA. |
| EN_SW1 / EN_SW2 (Pins 5–6) | Independent switch enable inputs | High-logic turns on respective N-MOSFET pair; internal 1.25-MΩ pull-up prevents floating; not recommended unconnected. |
| nFAULT1 / nFAULT2 (Pins 7–8) | Open-drain fault outputs | Assert low during over-current, reverse-voltage, or thermal fault; requires external pull-up for system-level interrupt signaling. |
| SW_OUT1 / SW_OUT2 (Pins 9, 12) | Switched power outputs | Deliver current-limited 5-V power to USB ports; support heavy capacitive loads and short-circuit recovery via deglitch timing. |
| FB (Pin 15) | Feedback sense node | Kelvin-connected to +5-V output capacitor; references internal 5-V divider; enables accurate regulation despite PCB trace resistance. |
| ROSC (Pin 4) | Oscillator frequency programming | Resistor-to-ground sets switching frequency from 300 kHz to 1.4 MHz; floating or tied to V7V selects default 600 kHz. |
| V7V (Pin 24) | Internal LDO output | 6.3-V regulated supply powering gate drivers and control logic; requires ≥1-µF ceramic decoupling to PGND. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent current-limited power switches | Each delivers up to 1.2-A (typ) continuous load with factory-trimmed thresholds (0.8/1.6/2 A options) and latch-off protection. |
| Integrated synchronous buck regulator | Fixed 5-V output, 4-A capability, 80-mΩ HS / 50-mΩ LS MOSFETs, and peak-current-mode control for fast transient response. |
| Reverse-voltage protection | Shuts off switches when SW_OUT exceeds SW_IN by >135 mV (typ); prevents backfeed into upstream rails during hot-swap events. |
| Programmable soft-start & tracking | 1-ms internal soft-start (SS pin floating); external capacitor enables adjustable ramp time or voltage tracking with other system rails. |
| Robust fault handling | 4-ms deglitch on over-current, 10-ms latch-off timeout, and automatic thermal shutdown (160°C) with 20°C hysteresis. |
Applications
| USB Hub Power Management | Digital TV Power Distribution |
|---|---|
|
Use Scenario: Providing individually controlled, current-limited 5-V power to four downstream USB 2.0 ports on a media hub board. IC Role / Device Role / Timing Role: Dual power switch handles port enable/disable sequencing; buck supplies clean 5-V rail for switch bias and USB PHYs. Use Value: Prevents bus-wide collapse during single-port short circuit; eliminates need for discrete polyfuses or current-sense amplifiers. |
Use Scenario: Delivering stable 5-V power to HDMI transceivers, tuner modules, and USB peripherals in a 4K digital TV mainboard. IC Role / Device Role / Timing Role: Buck regulator powers internal 5-V domain; dual switches isolate USB host and peripheral ports for safety and EMI control. Use Value: Meets IEC 61000-4-2 ESD immunity (15-kV air, 8-kV contact) with integrated 4-kV HBM protection on SW_OUT pins. |
| VoIP Phone Power System | Tablet PC Docking Interface |
|
Use Scenario: Managing 5-V power to Ethernet PHY, USB OTG port, and auxiliary peripherals in a PoE-powered VoIP desk phone. IC Role / Device Role / Timing Role: Buck converts 12-V PoE-derived rail to 5-V; switches enable/disconnect USB and LAN interfaces independently. Use Value: Reverse-voltage protection prevents backfeed from USB devices into PoE circuitry; latch-off avoids thermal runaway during cable faults. |
Use Scenario: Supplying and protecting 5-V power to USB-C docking station ports that connect to tablets with varying battery states. IC Role / Device Role / Timing Role: Dual switches provide hot-plug-safe 5-V VBUS to Type-A and Type-C downstream ports; buck ensures stable rail despite input ripple. Use Value: 2.5–6-V operating range on SW_IN allows direct connection to tablet battery or boosted rail; 1.2-A current limit complies with USB BC 1.2 spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-switch + buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2557DRCT | Dual-channel 1.5-A eFuse only - no integrated buck regulator; requires external 5-V supply. | Suitable where 5-V rail already exists; lacks power conversion capability and thermal coordination with switches. | Select when system already has a dedicated 5-V source and only needs intelligent USB port protection. |
| TPS65987DQFT | USB-C PD controller with dual 3-A switches and buck-boost converter (3–21 V); supports programmable VBUS profiles. | Targets USB-C DRP/DFP applications requiring variable VBUS (5/9/15/20 V); larger package (32-pin QFN) and higher complexity. | Select for USB-C PD sink/source designs needing dynamic voltage negotiation, not fixed 5-V USB-A hubs. |
Compared with TPS65280RGER, TPS2557DRCT offers higher per-port current (1.5 A vs 1.2 A) but no power conversion, while TPS65987DQFT adds USB-C PD flexibility at the cost of increased BOM count, layout area, and firmware dependency - making TPS65280RGER optimal for cost-sensitive, fixed-5V USB-A systems requiring integrated conversion and protection.
Availability
TPS65280RGER is available at Aetrix Electronics and suitable for digital TV, set-top box, and VoIP phone designs requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing for production programs.
Supply support for TPS65280RGER 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 specializing in analog, embedded processing, and power management ICs, with decades of expertise in high-reliability power delivery solutions.
The TPS65280RGER belongs to TI's USB power distribution PMIC family, engineered specifically for compact, cost-optimized consumer electronics requiring integrated 5-V conversion and dual-port current-limited switching - eliminating discrete FETs, sense resistors, and external regulators.
FAQ
What is the maximum input voltage supported by the TPS65280RGER buck converter?
The TPS65280RGER buck converter supports an absolute maximum input voltage of 18 V and a recommended operating range of 5.5 V to 18 V. This wide range accommodates common intermediate bus voltages such as 9 V, 12 V, and 15 V without requiring external pre-regulation. Exceeding 18 V may cause permanent damage per the absolute maximum ratings table in the SLVSBE4A datasheet.
Does the TPS65280RGER support external synchronization of its switching frequency?
Yes, the TPS65280RGER supports external clock synchronization via the MODE/SYNC pin (Pin 23). When an external clock signal is applied, the internal oscillator aligns its rising edge with the external clock's rising edge. This feature enables noise-sensitive systems to avoid beat frequencies and meet strict EMI requirements - a capability confirmed in Section 7.3.12 of the SLVSBE4A datasheet.
How does the TPS65280RGER handle reverse-voltage conditions on its power switch outputs?
The TPS65280RGER detects reverse voltage when SW_OUT exceeds SW_IN by >135 mV (typical) for 4 ms (typical), then disables the affected N-MOSFET pair and asserts the corresponding nFAULT pin. The switch remains latched off until power is cycled or the EN_SWx pin is toggled - preventing backfeed into upstream circuits. This behavior is explicitly documented in the "Reverse Current and Voltage Protection" section of the SLVSBE4A datasheet.
Can the current limit threshold of the TPS65280RGER power switches be adjusted externally?
No, the current limit threshold is factory-trimmed and not user-adjustable. The TPS65280RGER offers four fixed options: 0.8 A, 1.2 A (default), 1.6 A, and 2 A - selected at manufacturing. These values are specified in the Electrical Characteristics table (IOCP_SW parameter) and cannot be modified via external components or configuration pins. Designers must select the appropriate variant (e.g., TPS65280RGER for 1.2-A default) during BOM definition.
What is the purpose of the V7V pin on the TPS65280RGER, and how should it be decoupled?
The V7V pin (Pin 24) is the output of an internal low-dropout linear regulator that supplies ~6.3 V to gate drivers and control circuitry. It must be decoupled to PGND with a minimum 1-µF ceramic capacitor placed as close as possible to the pin. This ensures stable gate drive voltage for optimal RDS(on) performance and prevents oscillation in the bootstrap circuit - a requirement emphasized in the "TERMINAL FUNCTIONS" section of the SLVSBE4A datasheet.
TPS65280RGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 24-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 2
- Ratio - Input:Output:
- 1:2
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 5.5V ~ 18V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 4A
- Rds On (Typ):
- 80mOhm
- Input Type:
- -
- Features:
- Slew Rate Controlled, Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
TPS65280RGER FAQ
1.How can I place an order for TPS65280RGER through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65280RGER 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 TPS65280RGER reliable?
The price and inventory of TPS65280RGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65280RGER is usually 5 days.
3.What payment methods are accepted for TPS65280RGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65280RGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65280RGER?
TPS65280RGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65280RGER 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 TPS65280RGER?
For technical support, including TPS65280RGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65280RGER requirements.
6.How does Aetrix verify that TPS65280RGER is sourced from the original manufacturer or authorized distributors?
All TPS65280RGER 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 TPS65280RGER meets industry standards.
7.What is the process for return or replacement of TPS65280RGER?
All TPS65280RGER units undergo pre-shipment inspection (PSI). If there is an issue with TPS65280RGER, 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 TPS65280RGER part is unused and in its original packaging.
Return procedure for TPS65280RGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS65280RGER Tags
-
TPS22919DCKR
Texas Instruments
-
MIC2091-1YM5-TR
Microchip Technology
-
MIC2090-1YM5-TR
Microchip Technology
-
TPS22995RZFR
Texas Instruments
-
TPS22975DSGR
Texas Instruments
-
SIP32510DT-T1-GE3
Vishay Siliconix
-
ULN2003D1013TR
STMicroelectronics
-
MIC2005A-1YM5-TR
Microchip Technology
-
MIC2005A-1YM6-TR
Microchip Technology
-
TPS22916BYFPR
Texas Instruments
-
TPS22917DBVR
Texas Instruments
-
ULN2003APWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
