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Texas Instruments TPS65287RHAR
- Part No.:
- TPS65287RHAR
- Manufacturer:
- Texas Instruments
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
TPS65287RHAR.pdf
- Description:
- IC REG BCK ADJ 3A/2A TRPL 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,944
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Product details
Overview
TPS65287RHAR from Texas Instruments is a 40-pin QFN power management IC integrating three synchronous step-down buck converters (3 A / 2 A / 2 A), a 2.1-A USB power switch, push-button control, and power-good/reset supervision. It operates from 4.5 V to 18 V input, delivers 0.8-V reference with 1% accuracy, supports pre-biased outputs, and features hiccup-mode overcurrent protection for all rails - used in industrial motor drives and embedded computing power subsystems.
For engineers reviewing the TPS65287RHAR datasheet, TPS65287RHAR pinout, TPS65287RHAR application, or TPS65287RHAR equivalent, key selection criteria include its triple-buck architecture with independent enable/soft-start/current-limit pins, 300 kHz–2.2 MHz programmable switching frequency, integrated thermal shutdown (160°C trip), USB current limit set by RSET, and support for pulse-skipping mode achieving <2% output ripple at light load.
Technical Context
The TPS65287RHAR implements peak current-mode control with built-in slope compensation across all three buck converters, enabling stable operation with simple Type II compensation networks and crossover frequencies >100 kHz. Each converter uses integrated high-side (95 mΩ Buck1, 120 mΩ Buck2/Buck3) and low-side MOSFETs for synchronous conversion.
It integrates a dedicated USB switch with overcurrent fault flag (USB_nFAULT), thermal warning shutdown (130°C), and individual cycle-by-cycle current limiting via external resistors on RLIM1–RLIM3. The device also includes a 10-kV ESD-rated PB_IN pin, open-drain PGOOD with 85%/90% voltage thresholds, and F_PWM pin to force PWM mode globally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports 5/9/12/15-V systems without external regulators. |
| Buck1 Output Current | 3 A continuous, 3.5 A peak - sufficient for CPU core rail in embedded processors. |
| Buck2/Buck3 Output Current | 2 A continuous, 2.5 A peak each - suitable for I/O, memory, or peripheral rails. |
| Reference Voltage | 0.8 V ±1% - enables precise output setting down to 0.8 V with resistor divider. |
| Switching Frequency | 300 kHz to 2.2 MHz - set externally via ROSC resistor; 180° phase shift reduces input ripple. |
| USB Switch Current Limit | Configurable up to 2.1 A via RSET pin - meets USB BC1.2 and standard downstream port requirements. |
| Junction Temp Range | –40°C to 125°C - qualified for industrial temperature operation with thermal shutdown at 160°C. |
| Package | 40-pin RHA (6 mm × 6 mm QFN) with PowerPAD - optimized for thermal dissipation in compact layouts. |
Pinout & Package
TPS65287RHAR uses a thermally enhanced 40-pin QFN package (RHA) with exposed PowerPAD connected to system ground for electrical and thermal integrity. Pin count and layout match TI's documented 40-pin footprint with 0.4-mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1–FB3 | Feedback input | Connects to resistor divider to regulate each buck output at 0.8 V reference; supports pre-biased startup. |
| EN1–EN3 | Enable input | Active-high logic enables sequencing; weak 1-MΩ pull-up to V3V allows delayed start with external capacitor. |
| SS1–SS3 | Soft-start input | Controls ramp time via external ceramic capacitor; ~0.417 ms/nF delay per converter. |
| RLIM1–RLIM3 | Current limit set | Resistor-to-ground sets peak inductor current (0.75–4 A Buck1, 0.75–3 A Buck2/Buck3). |
| ROSC | Oscillator set | External resistor programs switching frequency from 300 kHz to 2.2 MHz. |
| PGOOD | Power-good output | Open-drain active-high signal asserted when all buck outputs are ≥90% of nominal voltage. |
| USB_EN / USB_nFAULT | USB control / fault flag | Enables/disables USB switch; nFAULT pulls low during overcurrent or overtemperature events. |
| PB_IN | Push-button input | 10-kV ESD-rated pin initiating system ON/OFF with 20-ms debounce; no external components required. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping mode | Enables high light-load efficiency while maintaining <2% output ripple - critical for standby power in always-on systems. |
| Hiccup-mode overcurrent protection | Shuts down affected converter for 10 ms after >10-ms overload, then retries - prevents thermal runaway without latching off. |
| Individual thermal protection for USB switch | Independent 130°C thermal trip (20°C hysteresis) isolates USB faults from buck operation - ensures system continuity. |
| Integrated OVP circuit | Disables high-side FET if FB exceeds 106% reference, re-enables at 104% - limits output overshoot during transients. |
| External soft-start & current limit | Capacitor- and resistor-programmable timing and current thresholds - simplifies design adaptation across multiple output configurations. |
Applications
| Industrial Motor Drive Control | Embedded Computing Platform |
|---|---|
Use Scenario: Powering FPGA I/O banks, microcontroller peripherals, and isolated communication interfaces in servo drive controllers. IC Role / Device Role / Timing Role: Central PMIC delivering three regulated rails (1.2 V, 1.8 V, 3.3 V) with coordinated sequencing and fault isolation. Use Value: Eliminates discrete DC-DC solutions, reduces BOM count by 7+ components, and enables robust restart after motor stall-induced overloads. | Use Scenario: Supplying SoC core, memory, and USB host in ruggedized edge AI gateways operating in -40°C to 85°C ambient. IC Role / Device Role / Timing Role: Single-chip power solution managing CPU core voltage (Buck1), DDR I/O (Buck2), and USB 2.0 VBUS (USB switch). Use Value: Achieves <2% ripple in PSM mode during idle, supports hot-plug USB devices via programmable current limit, and provides PGOOD for safe boot sequencing. |
| Automotive Infotainment Head Unit | Programmable Logic Controller (PLC) |
Use Scenario: Regulating display interface, audio codec, and CAN transceiver supplies in 12-V automotive infotainment systems. IC Role / Device Role / Timing Role: Triple-buck regulator with independent EN pins enabling staggered power-up of display backlight, processor, and communication modules. Use Value: Meets automotive transient requirements via integrated OVP, withstands cold-crank (4.5 V min), and supports push-button wake-up without MCU intervention. | Use Scenario: Powering PLC CPU, field I/O conditioning circuits, and isolated Ethernet PHY in factory automation cabinets. IC Role / Device Role / Timing Role: Primary power controller delivering 3.3 V for logic, 5 V (via USB switch) for field sensors, and 12 V-compatible input handling. Use Value: USB switch provides 2.1-A 5-V rail for powered sensors; hiccup-mode protection prevents latch-up during shorted field wiring; PGOOD validates all rails before PLC runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65288RHAR | Same pinout and feature set but adds I²C interface for dynamic voltage scaling and telemetry; higher quiescent current (1.2 mA vs 700 µA). | Required where firmware-controlled rail adjustment or real-time monitoring is needed - not drop-in for fixed-voltage designs. | Select TPS65288RHAR only if I²C configurability justifies added complexity and cost. |
| MP8866GQ-Z | Triple 3-A/2-A/2-A buck with 4.5–18-V input but no integrated USB switch or push-button logic; uses external MOSFETs for USB path. | Suitable for designs needing identical buck performance without USB functionality - requires additional components for USB power delivery. | Choose MP8866GQ-Z when USB integration is unnecessary and board space allows discrete USB switch implementation. |
Compared with TPS65287RHAR, TPS65288RHAR adds programmability at the cost of higher static power, while MP8866GQ-Z matches buck specs but shifts USB responsibility to external circuitry - making TPS65287RHAR optimal for compact, self-contained USB-aware industrial power systems.
Availability
TPS65287RHAR is available at Aetrix Electronics and suitable for industrial motor drives, embedded computing platforms, automotive infotainment head units, and programmable logic controllers requiring stable component supply across extended temperature ranges.
Supply support for TPS65287RHAR 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The TPS65287RHAR belongs to TI's high-current, multi-rail PMIC product line engineered for space-constrained industrial and computing applications demanding integrated buck regulation, USB power delivery, and intelligent system power control.
FAQ
What input voltage range does the TPS65287RHAR support?
The TPS65287RHAR supports an input voltage range of 4.5 V to 18 V, enabling direct operation from common industrial and automotive supply rails including 5-V, 9-V, 12-V, and 15-V systems. Its under-voltage lockout triggers at 4.1 V (falling) and 4.22 V (rising), ensuring reliable startup and brownout protection. This range is validated across the full –40°C to 125°C junction temperature specification.
How is the switching frequency configured on the TPS65287RHAR?
The TPS65287RHAR switching frequency is set externally using a resistor connected from the ROSC pin to ground. The device supports 300 kHz to 2.2 MHz, with frequency determined by the ROSC resistance per TI's published curve (e.g., 100 kΩ yields ~800 kHz). All three buck converters operate at the same frequency with 180° phase shift to minimize input capacitor RMS current.
Does the TPS65287RHAR support pre-biased output startup?
Yes, the TPS65287RHAR supports pre-biased output startup on all three buck converters. This is enabled by internal circuitry that prevents reverse current flow during startup when the output voltage is already present, allowing safe power sequencing in systems with shared or back-powered rails. The feature is active by default and requires no external configuration.
What protection features are integrated into the TPS65287RHAR USB switch?
The TPS65287RHAR USB switch includes overcurrent protection (programmable via RSET), open-drain USB_nFAULT flag assertion on fault, and dedicated thermal shutdown at 130°C with 20°C hysteresis. Unlike the main buck thermal shutdown (160°C), this protection operates independently - allowing USB faults to be contained without disrupting system power rails.
Can the TPS65287RHAR operate in forced PWM mode?
Yes, the TPS65287RHAR can operate in forced PWM mode across all three buck converters by driving the F_PWM pin high. In this mode, pulse-skipping is disabled, ensuring constant switching frequency and predictable EMI behavior - essential for noise-sensitive applications like audio or RF subsystems. When F_PWM is low, the device automatically enters PFM mode at light loads to maximize efficiency.
TPS65287RHAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 17V
- Current - Output:
- 3A, 2A
- Frequency - Switching:
- 300kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (6x6)
TPS65287RHAR FAQ
1.How can I place an order for TPS65287RHAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65287RHAR 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 TPS65287RHAR reliable?
The price and inventory of TPS65287RHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65287RHAR is usually 5 days.
3.What payment methods are accepted for TPS65287RHAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65287RHAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65287RHAR?
TPS65287RHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65287RHAR 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 TPS65287RHAR?
For technical support, including TPS65287RHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65287RHAR requirements.
6.How does Aetrix verify that TPS65287RHAR is sourced from the original manufacturer or authorized distributors?
All TPS65287RHAR 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 TPS65287RHAR meets industry standards.
7.What is the process for return or replacement of TPS65287RHAR?
All TPS65287RHAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65287RHAR, 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 TPS65287RHAR part is unused and in its original packaging.
Return procedure for TPS65287RHAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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