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Texas Instruments TPS65263-1QRHBRQ1
- Part No.:
- TPS65263-1QRHBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS65263-1QRHBRQ1.pdf
- Description:
- IC REG BUCK ADJ TRPL 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS65263-1QRHBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive triple synchronous step-down converter delivering 3-A/2-A/2-A output current per channel, operating from 4.0 V to 18 V input, with I²C-controlled dynamic voltage scaling for Buck2 (0.68–1.95 V in 10-mV steps), integrated 0.6-V ±1% feedback reference, and 200 kHz–2.3 MHz adjustable switching frequency. It enables power sequencing in car audio/video systems and ADAS domain controllers.
For engineers reviewing the TPS65263-1QRHBRQ1 datasheet, TPS65263-1QRHBRQ1 pinout, TPS65263-1QRHBRQ1 application, or TPS65263-1QRHBRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection behavior, and real-world I²C register-controlled DVS implementation details - not generic buck converter assumptions.
Technical Context
The TPS65263-1QRHBRQ1 implements constant-frequency peak-current-mode control across three independent buck regulators, each with dedicated ENx, SSx, COMPx, and FBx pins. Buck1 operates 180° out-of-phase with Buck2/Buck3 (which run in-phase), reducing input ripple and capacitor stress.
I²C interface (100 kHz standard / 400 kHz fast mode) supports read-back of power-good status, overcurrent warning, die temperature warning, and programmable VID slew rate for Buck2 via 3-bit control - enabling controlled voltage transitions during DVFS without overshoot/undershoot.
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 ECUs. |
| Output Current (Buck1/Buck2/Buck3) | 3 A / 2 A / 2 A - enables single-chip power delivery for multi-rail SoC domains (e.g., CPU core, I/O, memory). |
| Buck2 VID Range & Step | 0.68 V to 1.95 V in 10-mV steps (7-bit) - allows precise dynamic voltage scaling for ARM Cortex-A cores or DSPs. |
| Switching Frequency Range | 200 kHz to 2.3 MHz - adjustable via ROSC resistor; enables optimization of efficiency vs. EMI vs. component size. |
| Feedback Reference Voltage | 0.6 V ±1% - high-accuracy reference ensures tight output regulation across –40°C to 125°C junction range. |
| Thermal Protection Trip | 160°C with 20°C hysteresis - autonomous shutdown/restart prevents thermal runaway in enclosed automotive modules. |
| I²C Address | 0x60 - fixed slave address simplifies firmware integration in multi-device automotive networks. |
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 logic; internal 3.9-µA pullup allows standalone operation without external drivers. |
| FB1/FB2/FB3 | Kelvin feedback sensing | Separate high-impedance inputs for precision output voltage monitoring and loop compensation. |
| SS1/SS2/SS3 | Soft-start/tracking control | Internal 5.2-µA current source enables programmable ramp time via external capacitor. |
| BST1/BST2/BST3 | Bootstrap supply terminals | Connect 47-nF capacitor to LXx for high-side gate drive; integrated UVLO recharges bootstrap when VBST–VLX < 2.1 V. |
| SDA/SCL | I²C bidirectional interface | Open-drain pins compatible with 100/400 kHz modes; 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 synchronization to system timing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C junction operation, HBM ±2 kV, CDM ±500 V - meets automotive safety-critical requirements. |
| 180° phase-shifted Buck1 | Reduces RMS input current ripple by ~30%, allowing smaller input bulk capacitors and lower EMI filter cost. |
| I²C-controlled VID slew rate | 3-bit programmable transition speed for Buck2 - prevents transient-induced logic errors during DVFS in processors. |
| Dedicated loop compensation pins (COMP1–3) | Enables independent type-II/type-III compensation per buck - critical for stable multi-load transient response. |
| Hiccup-mode overcurrent protection | 256-cycle wait + 8192-cycle restart delay - limits fault energy while maintaining system recoverability after short-circuit events. |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC |
|---|---|
Use Scenario: Powers heterogeneous compute cluster (Cortex-A72, GPU, ISP) requiring independent, sequenced 1.2 V, 1.5 V, and 2.5 V rails with dynamic voltage scaling for thermal management. IC Role / Device Role / Timing Role: Triple-buck PMIC providing rail-specific enable control, soft-start timing, and I²C-synchronized DVFS for processor core voltage. Use Value: Eliminates need for discrete DC/DCs and external sequencing ICs; reduces BOM count by ≥5 components while meeting ISO 26262 ASIL-B power integrity requirements. |
Use Scenario: Supplies display processor, audio codec, and connectivity subsystem (Wi-Fi/Bluetooth) in head-unit with strict startup sequencing and low-noise operation. IC Role / Device Role / Timing Role: Centralized power manager delivering clean, regulated outputs with PGOOD coordination and phase interleaving to suppress conducted EMI. Use Value: Achieves <15 mV p-p output ripple at full load via 180° phase shift and integrated compensation - avoids audible noise in Class-D audio amplifiers. |
| Car Video Camera Module | Automotive Gateway ECU |
Use Scenario: Powers image sensor, ISP, and serializer in rear-view or surround-view camera with minimal board space and high reliability. IC Role / Device Role / Timing Role: Compact triple-buck regulator with thermal shutdown and overcurrent hiccup - ensures fail-safe shutdown under lens condensation-induced shorts. Use Value: Maintains operation down to –40°C ambient; 125°C junction rating enables placement near heat-generating image sensors without derating. |
Use Scenario: Supplies microcontroller, CAN transceivers, Ethernet PHY, and security module in Zonal E/E architecture gateway. IC Role / Device Role / Timing Role: High-input-voltage PMIC supporting 12 V battery transients up to 18 V; I²C enables remote health monitoring of all rails. Use Value: Integrated PGOOD and I²C status registers reduce need for external supervisors - cuts diagnostic firmware complexity and test time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65263-1QRHBTQ1 | Tape-and-reel variant (250-unit reel); identical electrical specs and pinout. | No functional difference - selected for automated SMT line compatibility. | Choose for high-volume production where reel packaging aligns with pick-and-place workflow. |
| MPQ4436-AEC1 | Single 3-A buck with external compensation; no I²C, no triple output, no phase shifting. | Requires two additional converters and sequencing logic to match TPS65263-1QRHBRQ1 functionality. | Select only if design requires discrete flexibility and can absorb added layout area and firmware overhead. |
Compared with TPS65263-1QRHBRQ1, the TPS65263-1QRHBTQ1 offers identical performance in a different packaging format, while MPQ4436-AEC1 lacks integrated triple-output capability and I²C-controlled DVFS - making it unsuitable as a drop-in replacement but viable for simplified, non-sequenced single-rail designs.
Availability
TPS65263-1QRHBRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS domain controllers, and zonal gateway ECUs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for TPS65263-1QRHBRQ1 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 over 40 years of automotive qualification experience.
The TPS65263-1Q1 product line delivers highly integrated, AEC-Q100-qualified multi-rail PMICs designed specifically for next-generation automotive compute platforms requiring dynamic voltage scaling, robust thermal protection, and I²C-based system-level power orchestration.
FAQ
What is the maximum continuous input voltage rating for the TPS65263-1QRHBRQ1?
The TPS65263-1QRHBRQ1 supports a maximum continuous input voltage of 18 V across PVIN1, PVIN2, PVIN3, and VIN pins, with absolute maximum ratings up to 20 V for transient conditions (<20 ns). This enables reliable operation across 12 V automotive battery systems including load-dump scenarios, and eliminates need for upstream pre-regulation in most ECU designs.
Does the TPS65263-1QRHBRQ1 support dynamic voltage scaling on all three buck outputs?
No - dynamic voltage scaling via I²C is supported only on Buck2 (VOUT2), with 7-bit VID programming from 0.68 V to 1.95 V in 10-mV steps. Buck1 and Buck3 output voltages are set solely by external feedback resistors and remain fixed during operation. This architecture prioritizes processor core rail flexibility while maintaining stable I/O and memory rails.
How does the TPS65263-1QRHBRQ1 handle thermal overload conditions?
The TPS65263-1QRHBRQ1 shuts down when junction temperature exceeds 160°C and automatically restarts once temperature falls 20°C below trip point (i.e., at ~140°C). This thermal hysteresis prevents oscillatory cycling and ensures safe recovery. The exposed thermal pad must be soldered to a PCB copper plane to achieve the specified RθJB = 7.4°C/W and sustain full 3-A/2-A/2-A output current.
Can the TPS65263-1QRHBRQ1 operate without I²C communication enabled?
Yes - floating or grounding the SDA and SCL pins disables I²C functionality, causing the TPS65263-1QRHBRQ1 to operate as a traditional triple buck converter. Each output is then controlled independently via its ENx pin, and Buck2 voltage is set by external feedback resistors only. No firmware or external controller is required for basic operation.
What is the purpose of the ROSC pin on the TPS65263-1QRHBRQ1?
The ROSC pin serves dual functions: (1) connecting a resistor to ground sets the internal oscillator frequency from 200 kHz to 2.3 MHz, and (2) accepting an external clock signal synchronizes all three buck channels to a system master clock - essential for EMI reduction in time-sensitive automotive networks. Internal PLL ensures jitter-free locking to falling edges of the external clock.
TPS65263-1QRHBRQ1 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)
TPS65263-1QRHBRQ1 FAQ
1.How can I place an order for TPS65263-1QRHBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65263-1QRHBRQ1 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 TPS65263-1QRHBRQ1 reliable?
The price and inventory of TPS65263-1QRHBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65263-1QRHBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS65263-1QRHBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65263-1QRHBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65263-1QRHBRQ1?
TPS65263-1QRHBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65263-1QRHBRQ1 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 TPS65263-1QRHBRQ1?
For technical support, including TPS65263-1QRHBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65263-1QRHBRQ1 requirements.
6.How does Aetrix verify that TPS65263-1QRHBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65263-1QRHBRQ1 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 TPS65263-1QRHBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS65263-1QRHBRQ1?
All TPS65263-1QRHBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65263-1QRHBRQ1, 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 TPS65263-1QRHBRQ1 part is unused and in its original packaging.
Return procedure for TPS65263-1QRHBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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