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Texas Instruments TPS65263QRHBRQ1
- Part No.:
- TPS65263QRHBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS65263QRHBRQ1.pdf
- Description:
- IC REG BUCK ADJ TRPL 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,798
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Product details
Overview
TPS65263QRHBRQ1 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 on Buck2 (0.68 V–1.95 V in 10-mV steps), integrated 0.6-V ±1% feedback reference, and 200-kHz to 2.3-MHz adjustable switching frequency - deployed in car audio systems requiring precise rail sequencing and thermal robustness.
For engineers reviewing the TPS65263QRHBRQ1 datasheet, TPS65263QRHBRQ1 pinout, TPS65263QRHBRQ1 application, or TPS65263QRHBRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade protection features (thermal, overcurrent, UVLO), real-world efficiency curves, and two rigorously cross-checked alternative parts for system-level power architecture evaluation.
Technical Context
The TPS65263QRHBRQ1 implements constant-frequency peak-current-mode control per buck channel, with independent loop compensation via COMP1/2/3 pins and 180° phase shift between Buck1 and Buck2/Buck3 to minimize input ripple. Each buck supports dedicated enable (EN1/2/3), soft-start (SS1/2/3), and Kelvin-sense feedback (FB1/2/3) for monotonic startup into prebiased loads.
I²C interface (standard/fast mode, 100 kHz/400 kHz, address 0x60) enables real-time readback of PGOOD status, die temperature warning, overcurrent flag, and programmable VID slew rate (3-bit control) for Buck2 voltage transitions - while ROSC pin allows resistor-based frequency tuning or external clock synchronization to reduce EMI.
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 without external regulators. |
| Output Currents | 3 A (Buck1), 2 A (Buck2), 2 A (Buck3) - enables single-chip power for multi-rail SoC subsystems (e.g., CPU core + I/O + memory). |
| Feedback Reference | 0.6 V ±1% - ensures tight output regulation (±1.7% total error including resistor tolerance) across –40°C to 125°C. |
| Buck2 VID Range | 0.68 V to 1.95 V in 10-mV steps (7-bit) - supports dynamic core voltage scaling for automotive processors during performance states. |
| Switching Frequency | 200 kHz to 2.3 MHz - adjustable via ROSC resistor; higher frequencies shrink filter size, lower frequencies improve light-load efficiency. |
| Thermal Protection | 160°C trip with 20°C hysteresis - prevents latch-up during sustained overload or poor PCB thermal design. |
| I²C Address | 0x60H - fixed hardware address simplifies multi-device bus management in compact automotive ECUs. |
Pinout & Package
RHB package: 32-pin VQFN, 5.00 mm × 5.00 mm body, exposed thermal pad (soldered to PCB ground for optimal thermal performance; no internal electrical connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 / EN3 | Independent enable inputs | Float to enable; each adjusts UVLO threshold via resistor divider - enables flexible power sequencing across rails. |
| FB1 / FB2 / FB3 | Kelvin-sense feedback inputs | Direct connection to resistor dividers; decouples sensing from high-current paths to maintain ±0.5% load regulation accuracy. |
| SS1 / SS2 / SS3 | Soft-start/tracking inputs | Internal 5.2-µA current source charges external capacitor - sets ramp time and enables voltage tracking between rails. |
| SDA / SCL | I²C bidirectional data/clock | Open-drain, 400-kHz fast-mode compatible; 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 within regulation and sequencing complete - critical for SoC reset coordination. |
| ROSC | Oscillator frequency control | Resistor-to-ground sets frequency; also accepts external clock for synchronized switching - reduces beat frequencies in multi-converter systems. |
| BST1 / BST2 / BST3 | Bootstrap supply terminals | Connect 47-nF capacitor to respective LX pin - sustains high-side gate drive during 100% duty cycle operation if bootstrap voltage >2.1 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C junction operation, HBM ESD level H2 (±2 kV), CDM level C4B (±500 V) - meets automotive reliability requirements. |
| 180° phase interleaving | Buck1 clock inverted relative to Buck2/Buck3 - cuts RMS input current ripple by ~40%, reducing required input capacitance and EMI filtering. |
| I²C-controlled VID slew rate | 3-bit programmable transition speed for Buck2 - prevents overshoot/undershoot during dynamic voltage scaling in processor DVFS applications. |
| Dedicated PGOOD pin | Asserts only after all three outputs reach regulation and sequencing completes - eliminates need for external supervisors in safety-critical boot sequences. |
| Integrated bootstrap circuitry | No external charge pump needed; internal UVLO monitors BST–LX voltage - enables reliable high-side drive down to 4-V input with minimal BOM count. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Power Module |
|---|---|
|
Use Scenario: Powers SoC (core, GPU, DDR), display interface, and audio codec from 12-V battery with strict sequencing and low-noise operation. IC Role / Device Role / Timing Role: Triple-buck PMIC providing independent, sequenced 1.2-V (core), 3.3-V (I/O), and 1.8-V (memory) rails with I²C-triggered DVFS during video processing load changes. Use Value: Eliminates discrete DC/DCs and sequencing ICs; 180° phase shift reduces input capacitor count by 2× compared to in-phase converters. |
Use Scenario: Supplies image sensor (1.2 V), ISP (1.8 V), and serializer (3.3 V) in rear-view or surround-view camera modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Automotive-grade triple buck delivering thermally stable, low-ripple power with PGOOD confirmation before sensor initialization. Use Value: AEC-Q100 Grade 1 rating ensures operation at 125°C junction; integrated thermal shutdown prevents field failure in sealed enclosures. |
| Car Audio Amplifier Subsystem | Telematics Control Unit (TCU) |
|
Use Scenario: Generates clean, low-noise 5-V analog supply and 1.2-V digital core rail for Class-D amplifier DSP and ADC/DAC stages. IC Role / Device Role / Timing Role: Dual-output buck (Buck2/Buck3) powers analog/digital domains with independent soft-start to prevent pop/click during power-up. Use Value: Kelvin-sense FB2/FB3 pins maintain <±10 mV load regulation across 0–2 A, critical for THD-sensitive audio signal chains. |
Use Scenario: Powers LTE modem (1.2 V), microcontroller (3.3 V), and CAN transceiver (5 V) in vehicle connectivity modules with firmware-updatable voltage profiles. IC Role / Device Role / Timing Role: I²C-configurable Buck2 enables remote firmware updates to adjust core voltage for modem power optimization. Use Value: 7-bit VID with 10-mV resolution allows fine-grained DVFS tuning - reduces average power by up to 18% in LTE idle states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65261QRHBRQ1 | Fixed 1.2-V/3.3-V/5-V outputs; no I²C or VID; lower max input (6 V) | Suitable for cost-sensitive infotainment where voltage flexibility is unnecessary | Select when I²C control and dynamic scaling are not required - saves firmware complexity but sacrifices DVFS capability. |
| MPQ4436-AEC1 | Single 3-A buck; requires two additional converters for triple-rail; no integrated I²C | Used in modular designs where redundancy or staggered sourcing is preferred | Choose for higher per-rail efficiency at light load (MPQ4436 uses adaptive CCM); avoid when board space or BOM count is constrained. |
Compared with TPS65263QRHBRQ1, TPS65261QRHBRQ1 removes I²C and VID but lowers cost and simplifies layout, while MPQ4436-AEC1 offers better light-load efficiency per channel but increases component count, PCB area, and sequencing design effort.
Availability
TPS65263QRHBRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for TPS65263QRHBRQ1 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 automotive power management expertise and ISO/TS 16949-certified manufacturing.
The TPS65263-Q1 product line delivers highly integrated, AEC-Q100-qualified power management ICs for automotive infotainment, ADAS, and body electronics - designed to replace discrete buck solutions while meeting stringent thermal, EMI, and functional safety requirements.
FAQ
What is the maximum continuous input voltage rating for the TPS65263QRHBRQ1?
The TPS65263QRHBRQ1 has an absolute maximum input voltage rating of 20 V across PVIN1, PVIN2, PVIN3, and VIN pins, but its recommended continuous operating input voltage range is strictly 4.0 V to 18 V per AEC-Q100 qualification and datasheet specifications. Operation above 18 V may compromise long-term reliability or violate automotive safety margins, even if transiently tolerated.
Does the TPS65263QRHBRQ1 support 100% duty cycle operation?
Yes, the TPS65263QRHBRQ1 supports 100% duty cycle operation as long as the bootstrap capacitor voltage (BST–LX) remains above the internal UVLO threshold of 2.1 V. This enables dropout operation at low input voltages, such as stepping 5.0 V down to 3.3 V without discontinuous conduction mode penalties - critical for automotive cold-crank scenarios.
How is the switching frequency set on the TPS65263QRHBRQ1?
The switching frequency of the TPS65263QRHBRQ1 is set via an external resistor connected between the ROSC pin and ground, enabling adjustment from 200 kHz to 2.3 MHz. Alternatively, an external clock signal applied to ROSC synchronizes all three buck channels to that source - eliminating beat frequencies and easing EMI compliance testing in complex automotive ECUs.
Can the TPS65263QRHBRQ1 operate without I²C communication enabled?
Yes, the TPS65263QRHBRQ1 operates fully as a standalone triple buck converter when SDA and SCL pins are floated or tied to GND - disabling I²C functionality. In this mode, output voltages are set solely by external feedback resistors, and enable/soft-start remain controlled by ENx/SSx pins, preserving full analog operation for legacy or cost-optimized designs.
What thermal metrics apply to the TPS65263QRHBRQ1 RHB package?
The TPS65263QRHBRQ1 in the 32-pin VQFN (RHB) package has a junction-to-board thermal resistance (RθJB) of 7.4°C/W and junction-to-ambient (RθJA) of 33.3°C/W when mounted on a standard 4-layer JEDEC test board. The exposed thermal pad must be soldered to a solid copper pour for these values to be achieved - insufficient thermal relief reduces effective heat dissipation by up to 40%.
TPS65263QRHBRQ1 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)
TPS65263QRHBRQ1 FAQ
1.How can I place an order for TPS65263QRHBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65263QRHBRQ1 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 TPS65263QRHBRQ1 reliable?
The price and inventory of TPS65263QRHBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65263QRHBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS65263QRHBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65263QRHBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65263QRHBRQ1?
TPS65263QRHBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65263QRHBRQ1 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 TPS65263QRHBRQ1?
For technical support, including TPS65263QRHBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65263QRHBRQ1 requirements.
6.How does Aetrix verify that TPS65263QRHBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65263QRHBRQ1 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 TPS65263QRHBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS65263QRHBRQ1?
All TPS65263QRHBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65263QRHBRQ1, 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 TPS65263QRHBRQ1 part is unused and in its original packaging.
Return procedure for TPS65263QRHBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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