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Texas Instruments TPS65263-1QRHBTQ1
- Part No.:
- TPS65263-1QRHBTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS65263-1QRHBTQ1.pdf
- Description:
- IC REG BUCK ADJ TRPL 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:340
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Product details
Overview
TPS65263-1QRHBTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive triple synchronous step-down converter delivering 3-A/2-A/2-A output current across three independent buck channels, operating from 4.0 V to 18 V input, with I²C-controlled dynamic voltage scaling (DVS) for Buck2 (0.68–1.95 V in 10-mV steps), 0.6 V ±1% feedback reference, and adjustable 200 kHz–2.3 MHz switching frequency. It serves as a primary power management IC in automotive infotainment and ADAS domain controllers.
For engineers reviewing the TPS65263-1QRHBTQ1 datasheet, TPS65263-1QRHBTQ1 pinout, TPS65263-1QRHBTQ1 application, or TPS65263-1QRHBTQ1 equivalent, key selection criteria include its triple-buck architecture with 180° phase-shifted Buck1 vs Buck2/Buck3, I²C read-back of PGOOD/overcurrent/die temperature, FCC/PSM light-load mode control, and integrated thermal/overcurrent protection with hiccup recovery.
Technical Context
The TPS65263-1QRHBTQ1 implements constant-frequency peak-current-mode control per buck channel, with dedicated COMP, FB, SS, EN, BST, LX, and PGND pins enabling independent loop compensation, soft-start, and bootstrap management. Its internal PLL synchronizes switching to external clock via ROSC pin, and Buck1 operates 180° out-of-phase with Buck2/Buck3 to minimize input ripple.
I²C interface supports standard (100 kHz) and fast (400 kHz) modes with 7-bit address 0x60H, enabling real-time VID updates for Buck2, mode selection (FCC/PSM), and status register reads-including power-good assertion, overcurrent warning, and die temperature alert-while maintaining full analog control fallback when SDA/SCL are grounded or floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.0 V to 18 V - supports 5 V, 9 V, 12 V, and 15 V intermediate bus rails in automotive systems. |
| Output Currents | 3 A (Buck1), 2 A (Buck2), 2 A (Buck3) - enables single-chip power delivery for multi-rail SoC domains. |
| Feedback Reference | 0.6 V ±1% - ensures tight output regulation across –40°C to 125°C junction temperature range. |
| Switching Frequency | 200 kHz to 2.3 MHz - adjustable via ROSC resistor or external sync clock to optimize EMI, efficiency, and filter size. |
| Buck2 VID Range | 0.68 V to 1.95 V in 10-mV steps - enables dynamic core voltage scaling for processors under I²C command. |
| Thermal Protection | 160°C trip with 20°C hysteresis - automatic shutdown and restart prevents sustained overheating in enclosed modules. |
| I²C Address | 0x60H - fixed 7-bit slave address compatible with standard and fast-mode buses. |
Pinout & Package
RHB package: 32-pin VQFN, 5.00 mm × 5.00 mm body, exposed thermal pad requiring PCB soldering for optimal thermal performance (RθJA = 33.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 / EN3 | Independent enable inputs | Float-to-enable logic; each controls startup timing and UVLO threshold adjustment via external resistor divider. |
| FB1 / FB2 / FB3 | Kelvin feedback sensing | Direct connection to resistor dividers for precise output voltage regulation and load/line regulation stability. |
| SS1 / SS2 / SS3 | Soft-start/tracking input | Internal 5.2 µA pullup current source enables programmable ramp time with external capacitor for monotonic start-up. |
| BST1 / BST2 / BST3 | Bootstrap supply | Connect 47 nF capacitor to respective LX pin to sustain high-side gate drive during 100% duty cycle operation. |
| PGOOD | Global power-good indicator | Open-drain output asserted high only when all three bucks meet regulation and sequencing requirements. |
| SDA / SCL | I²C bidirectional interface | Supports 100 kHz/400 kHz communication; floating or GND connection disables I²C and reverts to analog-only operation. |
| ROSC | Oscillator frequency control | Resistor-to-ground sets switching frequency; also accepts external clock for system-level synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent buck regulators | Enables discrete rail control for CPU, GPU, and I/O domains without external sequencing ICs. |
| I²C-controlled dynamic voltage scaling | 7-bit VID for Buck2 allows real-time core voltage adaptation to workload, reducing active power by up to 30%. |
| 180° phase shift between Buck1 and Buck2/Buck3 | Reduces RMS input current ripple by ~40%, allowing smaller input bulk capacitors and lower EMI filtering cost. |
| Dedicated loop compensation pins (COMP1–3) | Per-channel error amplifier outputs support custom Type II/III compensation for varying load transient profiles. |
| Integrated thermal and overcurrent protection | Hiccup-mode recovery (256-cycle wait + 8192-cycle restart) prevents latch-up while maintaining system resilience. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power Supply |
|---|---|
|
Use Scenario: Powering SoC, DDR memory, and display interface in a vehicle head unit with thermal constraints and EMI limits. IC Role / Device Role / Timing Role: Primary PMIC delivering 1.2 V (core), 1.5 V (memory), and 2.5 V (I/O) rails with synchronized switching and I²C-based DVS for processor throttling. Use Value: Phase-shifted operation cuts input ripple by 40%, reducing 12 V bus capacitor count; I²C read-back of die temperature enables firmware thermal derating. |
Use Scenario: Supplying image sensor, ISP, and SerDes in a compact rear-view camera module exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Triple-buck regulator with AEC-Q100 Grade 1 qualification, supporting –40°C to 125°C operation and robust UVLO/OTP protection. Use Value: Integrated 160°C thermal shutdown with 20°C hysteresis prevents permanent damage during prolonged sun exposure; 0.6 V reference ensures <±1.5% output accuracy at max junction temp. |
| Car Audio Amplifier DSP Core | Automotive Telematics Control Unit |
|
Use Scenario: Providing clean, low-noise power to a digital signal processor and audio codec in a Class-D amplifier subsystem. IC Role / Device Role / Timing Role: High-efficiency buck converter with FCC/PSM mode selection via I²C to maintain low quiescent current (<750 µA) during standby and high PSRR during active audio processing. Use Value: Adjustable 200 kHz–2.3 MHz switching frequency avoids AM band interference; dedicated soft-start pins ensure monotonic startup into prebiased loads. |
Use Scenario: Powering LTE modem, GNSS receiver, and microcontroller in a telematics gateway requiring long-term reliability and functional safety awareness. IC Role / Device Role / Timing Role: Automotive-grade triple-buck PMIC with I²C status monitoring (PGOOD, overcurrent, die temp) for ASIL-B–aware system diagnostics. Use Value: I²C read-back capability enables host MCU to log fault conditions for diagnostic trouble code (DTC) generation; PGOOD pin provides hardware-level system reset coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-buck PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65263QRHBTQ1 | Non-I²C variant; Buck2 output fixed by external resistors, no dynamic voltage scaling. | Suitable for cost-sensitive designs where core voltage is static and no host-controlled DVS is required. | Select when I²C infrastructure is unavailable or firmware complexity must be minimized. |
| TPS65261-1QRHBTQ1 | Lower current rating (2.5 A/1.5 A/1.5 A); identical pinout and feature set otherwise. | Applicable in lower-power ADAS sensors or gateway sub-modules with reduced SoC rail demands. | Choose when total output current requirement is ≤2.5 A per rail and footprint compatibility is critical. |
Compared with TPS65263QRHBTQ1 and TPS65261-1QRHBTQ1, the TPS65263-1QRHBTQ1 uniquely delivers I²C-programmable Buck2 voltage scaling and higher 3-A/2-A/2-A output capability-enabling adaptive power management in next-generation automotive processors without redesigning layout or adding external DACs.
Availability
TPS65263-1QRHBTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TPS65263-1QRHBTQ1 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 technologies, with deep expertise in automotive-grade IC design and manufacturing.
The TPS65263-1QRHBTQ1 belongs to TI's automotive power management IC portfolio, engineered specifically for domain controller and ADAS applications demanding high integration, functional safety awareness, and robust thermal/EMI performance.
FAQ
What is the maximum continuous input voltage rating for the TPS65263-1QRHBTQ1?
The TPS65263-1QRHBTQ1 has an absolute maximum input voltage rating of 20 V on PVIN1/PVIN2/PVIN3/VIN pins, but its recommended continuous operating input voltage range is strictly 4.0 V to 18 V per AEC-Q100 specifications. Operation above 18 V may trigger overvoltage protection or degrade long-term reliability, even if within absolute max ratings.
Does the TPS65263-1QRHBTQ1 support 100% duty cycle operation?
Yes, the TPS65263-1QRHBTQ1 supports 100% duty cycle operation as long as the bootstrap capacitor voltage (BSTx–LXx) remains above the 2.1 V UVLO threshold. This capability enables dropout operation in low-VIN scenarios such as cold-crank conditions in automotive systems.
How does the I²C interface behave when SDA and SCL pins are left unconnected?
When SDA and SCL pins are floating or tied to GND, the TPS65263-1QRHBTQ1 disables I²C communication and operates in standalone analog mode: Buck2 output voltage is set solely by external feedback resistors, and all enable/soft-start functions remain fully controllable via ENx/SSx pins without firmware dependency.
What is the purpose of the ROSC pin on the TPS65263-1QRHBTQ1?
The ROSC pin on the TPS65263-1QRHBTQ1 serves dual functions: (1) connecting a resistor to ground sets the internal oscillator frequency from 200 kHz to 2.3 MHz; (2) applying an external clock signal enables synchronization of all three buck channels to a system master clock, reducing beat frequencies and improving EMI predictability.
Can the TPS65263-1QRHBTQ1 safely start up into a prebiased output?
Yes, the TPS65263-1QRHBTQ1 is explicitly designed for safe monotonic start-up into prebiased loads. Its current-limited soft-start circuitry and controlled gate-drive timing prevent reverse current flow or output overshoot, making it suitable for hot-swap and rail-sequencing applications in automotive ECUs.
TPS65263-1QRHBTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-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):
- 4V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.68V
- Voltage - Output (Max):
- 6.3V
- Current - Output:
- 3A, 2A, 2A
- Frequency - Switching:
- 200kHz ~ 2.3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (5x5)
TPS65263-1QRHBTQ1 FAQ
1.How can I place an order for TPS65263-1QRHBTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65263-1QRHBTQ1 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 TPS65263-1QRHBTQ1 reliable?
The price and inventory of TPS65263-1QRHBTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65263-1QRHBTQ1 is usually 5 days.
3.What payment methods are accepted for TPS65263-1QRHBTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65263-1QRHBTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65263-1QRHBTQ1?
TPS65263-1QRHBTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65263-1QRHBTQ1 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 TPS65263-1QRHBTQ1?
For technical support, including TPS65263-1QRHBTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65263-1QRHBTQ1 requirements.
6.How does Aetrix verify that TPS65263-1QRHBTQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65263-1QRHBTQ1 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 TPS65263-1QRHBTQ1 meets industry standards.
7.What is the process for return or replacement of TPS65263-1QRHBTQ1?
All TPS65263-1QRHBTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65263-1QRHBTQ1, 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 TPS65263-1QRHBTQ1 part is unused and in its original packaging.
Return procedure for TPS65263-1QRHBTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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