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Texas Instruments TPS65263QRHBTQ1
- Part No.:
- TPS65263QRHBTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS65263QRHBTQ1.pdf
- Description:
- IC REG BUCK ADJ TRPL 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
TPS65263QRHBTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive triple synchronous step-down converter delivering 3-A/2-A/2-A output currents across three independent buck channels, operating from a 4.0-V to 18-V input range, with I²C-controlled dynamic voltage scaling for Buck2 (0.68 V–1.95 V in 10-mV steps), integrated power-good monitoring, and thermal protection - deployed in car audio/video power rails and ADAS domain controllers.
For engineers reviewing the TPS65263QRHBTQ1 datasheet, TPS65263QRHBTQ1 pinout, TPS65263QRHBTQ1 application, or TPS65263QRHBTQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed I²C register-accessible features (VID, PGOOD readback, die temp warning), exact thermal metrics (RθJA = 33.3°C/W), and automotive-grade reliability data including HBM ESD Class H2 and CDM Class C4B.
Technical Context
The TPS65263QRHBTQ1 implements constant-frequency peak-current-mode control per buck channel, with 180° phase shift between Buck1 and Buck2/Buck3 (which operate in-phase) to minimize input ripple and reduce bulk capacitance requirements. Each buck has dedicated ENx, SSx, COMPx, and FBx pins enabling independent sequencing, soft-start timing, loop compensation, and Kelvin-sense feedback.
I²C interface supports standard (100 kHz) and fast mode (400 kHz), with address 0x60H, enabling real-time VID programming of Buck2, readback of power-good status, overcurrent warnings, and die temperature alerts. The ROSC pin allows resistor-programmable switching frequency (200 kHz–2.3 MHz) or external clock synchronization via PLL.
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 systems in automotive ECUs. |
| Output Currents | 3 A (Buck1), 2 A (Buck2), 2 A (Buck3) - enables single-chip power delivery for multi-rail SoC subsystems. |
| Feedback Reference | 0.6 V ±1% - ensures tight output regulation accuracy across –40°C to 125°C junction temperature. |
| Switching Frequency | 200 kHz to 2.3 MHz - adjustable via ROSC pin resistor; allows optimization of efficiency vs. size vs. EMI. |
| I²C Address | 0x60H - fixed 7-bit slave address supporting standard/fast mode for host SoC coordination. |
| Thermal Resistance | RθJA = 33.3°C/W - measured on JEDEC-standard 2-layer board; informs heatsinking and layout decisions. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C TJ) - qualified for under-hood and infotainment applications per automotive standards. |
Pinout & Package
RHB package: 32-pin VQFN, 5.00 mm × 5.00 mm body, exposed thermal pad (soldered to PCB for optimal thermal performance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 / EN3 | Independent enable inputs | Float to enable; support UVLO adjustment via resistor divider - enables flexible power sequencing. |
| FB1 / FB2 / FB3 | Kelvin feedback sense inputs | Connect to resistor dividers for precise output voltage setting; separate for each buck channel. |
| SS1 / SS2 / SS3 | Soft-start/tracking inputs | Internal 5.2-µA pullup current source; capacitor-based timing controls inrush current and sequencing. |
| SDA / SCL | I²C bidirectional data/clock | Support 100 kHz / 400 kHz; float or tie to GND to disable I²C and revert to analog-only operation. |
| PGOOD | Global power-good indicator | Open-drain output asserted high only when all three bucks are in regulation and sequencing complete. |
| ROSC | Oscillator frequency control | Resistor-to-ground sets switching frequency; also accepts external clock for system-level synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-controlled dynamic voltage scaling | Buck2 output programmable from 0.68 V to 1.95 V in 10-mV steps via 7-bit VID - enables adaptive core voltage tuning for processors. |
| Programmable VID slew rate | 3-bit I²C control adjusts transition speed to minimize overshoot/undershoot during voltage changes - critical for stable SoC operation. |
| Dedicated loop compensation | Individual COMP1/COMP2/COMP3 pins allow per-buck type-II or type-III compensation - simplifies stability tuning across varying loads. |
| 180° phase interleaving | Buck1 clock 180° out-of-phase with Buck2/Buck3 - reduces RMS input current ripple by ~40%, shrinking input capacitor size. |
| Integrated bootstrap recharge | Automatic LX pull-low when BST–LX drops below ~2.1 V - eliminates need for external diode and enables 100% duty cycle capability. |
Applications
| Automotive Infotainment Power | ADAS Domain Controller Rails |
|---|---|
Use Scenario: Supplies multiple voltage rails (e.g., 1.2 V core, 2.5 V I/O, 3.3 V interface) to SoCs and FPGAs in head-unit and digital cockpit systems. IC Role / Device Role / Timing Role: Triple-buck PMIC providing sequenced, monitored, and dynamically scalable power with automotive-grade reliability. Use Value: Reduces BOM count by replacing three discrete converters; I²C VID enables runtime voltage adaptation for thermal/power management. |
Use Scenario: Powers vision processor, radar MCU, and sensor interface ICs in centralized ADAS ECUs requiring strict sequencing and fault reporting. IC Role / Device Role / Timing Role: Centralized power manager with independent EN/SS control per rail and PGOOD-driven system startup validation. Use Value: Monotonic start-up into prebiased loads prevents latch-up; thermal shutdown and overcurrent hiccup protect against field failures. |
| Car Audio Amplifier Bias | Telematics Gateway Core Supply |
Use Scenario: Delivers clean, low-noise 5 V and 3.3 V rails to Class-D amplifier stages and DSPs in premium audio systems. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator with phase interleaving minimizing input ripple-induced noise coupling. Use Value: 90%+ efficiency at 2 A load reduces thermal stress; RθJB = 7.4°C/W enables compact heatsink-free layout. |
Use Scenario: Provides regulated 1.5 V, 1.2 V, and 2.5 V supplies to LTE/C-V2X modems, GNSS receivers, and secure boot MCUs in telematics control units. IC Role / Device Role / Timing Role: Automotive-qualified power hub with I²C-readback of die temperature and overcurrent warnings for predictive maintenance. Use Value: Real-time health telemetry via I²C enables firmware-triggered throttling before thermal derating occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-buck PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65261QRHBTQ1 | Same RHB package and pinout; lacks I²C interface and VID control - fixed-output voltages set solely by external resistors. | Suitable for cost-sensitive designs where dynamic voltage scaling is unnecessary and simpler analog control suffices. | Select when I²C communication and runtime Buck2 voltage reprogramming are not required. |
| MPQ4436-AEC1 | Triple 3-A/2-A/2-A buck with AEC-Q100 Grade 1, but uses SPI instead of I²C and offers no VID DAC for Buck2 voltage scaling. | Preferred where SPI-based host interfaces dominate and deterministic command latency is prioritized over I²C bus simplicity. | Choose when existing platform uses SPI peripherals and requires identical current ratings without VID functionality. |
Compared with TPS65263QRHBTQ1, TPS65261QRHBTQ1 removes I²C complexity but forfeits dynamic voltage control, while MPQ4436-AEC1 retains automotive qualification and output capability but replaces I²C with SPI and omits Buck2 VID - making TPS65263QRHBTQ1 uniquely suited for SoC-centric automotive systems requiring I²C-coordinated voltage adaptation.
Availability
TPS65263QRHBTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, car audio amplifiers, telematics gateways, and camera module power systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for TPS65263QRHBTQ1 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 automotive-grade power management solutions with decades of automotive qualification expertise.
The TPS65263-Q1 product line delivers highly integrated, AEC-Q100-qualified triple-buck PMICs designed specifically for next-generation automotive infotainment, ADAS, and telematics systems demanding dynamic voltage scaling, robust fault reporting, and minimal external component count.
FAQ
What is the maximum continuous input voltage rating for the TPS65263QRHBTQ1?
The TPS65263QRHBTQ1 supports a maximum continuous input voltage of 18 V across PVIN1, PVIN2, and PVIN3 pins, with absolute maximum transient rating up to 20 V for <20 ns pulses. This accommodates 12 V battery systems with load-dump transients and 15 V intermediate bus architectures common in automotive modules.
Does the TPS65263QRHBTQ1 support dynamic voltage scaling on all three buck outputs?
No - dynamic voltage scaling via I²C-controlled 7-bit VID is supported only on Buck2 (0.68 V to 1.95 V in 10-mV steps). Buck1 and Buck3 output voltages are set exclusively by external feedback resistors and remain fixed during operation unless reconfigured externally.
How does the TPS65263QRHBTQ1 handle thermal overload conditions?
The TPS65263QRHBTQ1 incorporates thermal shutdown with a trip point of 160°C and 20°C hysteresis. When junction temperature exceeds 160°C, all buck converters halt switching and enter hiccup mode, restarting only after temperature falls below 140°C - protecting against sustained overtemperature events in enclosed automotive enclosures.
Can the TPS65263QRHBTQ1 operate without I²C communication enabled?
Yes - floating or grounding the SDA and SCL pins disables I²C functionality, causing the TPS65263QRHBTQ1 to operate as a traditional triple-buck converter. All three outputs are then controlled solely by their respective ENx pins and external feedback networks, with no VID or status readback capability.
What is the purpose of the ROSC pin on the TPS65263QRHBTQ1?
The ROSC pin on the TPS65263QRHBTQ1 serves dual functions: (1) connecting a resistor to ground sets the internal oscillator frequency from 200 kHz to 2.3 MHz, and (2) applying an external clock signal synchronizes all three buck channels to that source - essential for EMI reduction in noise-sensitive automotive domains.
TPS65263QRHBTQ1 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)
TPS65263QRHBTQ1 FAQ
1.How can I place an order for TPS65263QRHBTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65263QRHBTQ1 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 TPS65263QRHBTQ1 reliable?
The price and inventory of TPS65263QRHBTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65263QRHBTQ1 is usually 5 days.
3.What payment methods are accepted for TPS65263QRHBTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65263QRHBTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65263QRHBTQ1?
TPS65263QRHBTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65263QRHBTQ1 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 TPS65263QRHBTQ1?
For technical support, including TPS65263QRHBTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65263QRHBTQ1 requirements.
6.How does Aetrix verify that TPS65263QRHBTQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65263QRHBTQ1 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 TPS65263QRHBTQ1 meets industry standards.
7.What is the process for return or replacement of TPS65263QRHBTQ1?
All TPS65263QRHBTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65263QRHBTQ1, 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 TPS65263QRHBTQ1 part is unused and in its original packaging.
Return procedure for TPS65263QRHBTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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