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Texas Instruments TPS65263RHBR
- Part No.:
- TPS65263RHBR
- Manufacturer:
- Texas Instruments
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS65263RHBR.pdf
- Description:
- IC REG BCK PROG 3A/TRPL 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,549
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Product details
Overview
TPS65263RHBR from Texas Instruments is a triple synchronous step-down DC/DC converter IC with 4.5–18 V input range and independent 3-A/2-A/2-A output channels, I²C-controlled dynamic voltage scaling (0.68–1.95 V in 10-mV steps), fixed 600-kHz switching frequency, and integrated thermal/overcurrent protection-designed for multi-rail power management in DTV LCD panels and set-top boxes.
For engineers reviewing the TPS65263RHBR datasheet, TPS65263RHBR pinout, TPS65263RHBR application, or TPS65263RHBR equivalent, this device supports I²C read-back of power-good status, die temperature, and overcurrent warnings; enables per-buck soft-start, enable control, and PSM/FCC mode selection; and delivers phase-shifted operation (buck1 180° out-of-phase with buck2/buck3) to reduce input ripple.
Technical Context
The TPS65263RHBR implements constant-frequency peak-current-mode control across three independent buck regulators, each with dedicated COMP, SS, EN, FB, and LX pins. Its 600-kHz oscillator operates with ±5% variation over temperature and load, and buck1 is phase-shifted 180° relative to buck2/buck3 to minimize input capacitor RMS current.
I²C interface supports standard (100 kHz) and fast (400 kHz) modes with 7-bit slave address 0x60H; VID programming updates output voltage via register writes, triggering slew-rate-controlled transitions using 3-bit programmable slew control. Each buck includes internal 0.6-V ±1% reference, UVLO monitoring, and hiccup-mode overcurrent protection with 0.5-ms wait and 14-ms restart timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports common intermediate bus rails (5 V, 9 V, 12 V, 15 V) without external pre-regulation. |
| Output Current Capability | 3 A / 2 A / 2 A - enables simultaneous powering of CPU core, memory, and I/O rails in embedded video systems. |
| Switching Frequency | 600 kHz (±5%) - balances efficiency, size, and EMI; fixed frequency simplifies filter design and avoids audible noise. |
| VID Resolution & Range | 7-bit I²C-programmable, 0.68–1.95 V in 10-mV steps - allows fine-grained dynamic voltage scaling for SoC performance/power tuning. |
| Feedback Reference Voltage | 0.6 V ±1% - high-accuracy reference enables tight output regulation (<±1.5% total error over line/load/temp). |
| Thermal Protection | 160°C trip with 20°C hysteresis - ensures safe shutdown and automatic recovery under sustained overload or poor heatsinking. |
| I²C Interface Speed | Up to 400 kHz - supports real-time voltage adjustment and status polling without requiring high-speed MCU peripherals. |
Pinout & Package
VQFN-32 (RHB) package, 5.0 mm × 5.0 mm body, 0.5-mm pitch, with exposed thermal pad soldered to PCB ground plane for optimal thermal performance (RθJA = 33.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2, EN3 | Independent enable inputs | Float-high logic enables each buck; resistor divider on ENx adjusts UVLO threshold per channel. |
| FB1, FB2, FB3 | Kelvin feedback sense inputs | Connect directly to resistor dividers for accurate output voltage regulation; separate from VOUTx pins to reject trace IR drop. |
| SS1, SS2, SS3 | Soft-start/tracking inputs | Internal 5-µA current source charges external capacitor to control startup ramp rate and sequencing. |
| BST1–BST3 | Bootstrap supply terminals | Each connects to LX via 47-nF capacitor to generate gate drive voltage for high-side MOSFETs. |
| SDA, SCL | I²C bidirectional data/clock | Support standard/fast mode; open-drain with internal pullups; address 0x60H; enable real-time telemetry and control. |
| PGND1–PGND3 | Power ground returns | Dedicated low-inductance paths to respective input capacitors-critical for stable current-mode operation and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-controlled dynamic voltage scaling | Per-buck 7-bit VID with 10-mV resolution and programmable slew rate-enables adaptive power states without firmware reflash. |
| Phase-shifted switching architecture | Buck1 clock 180° out-of-phase with buck2/buck3-reduces input ripple by ~40%, allowing smaller bulk capacitance. |
| Integrated bootstrap circuitry | No external charge pump required; BST-LX UVLO (2.1 V typical) ensures reliable high-side gate drive across duty cycle range. |
| Monotonic startup into pre-biased loads | Prevents reverse current flow during hot-plug or partial-power-up scenarios-essential for system-level reliability. |
| Comprehensive fault reporting | I²C-readable registers for power-good status, overcurrent warning per buck, and die temperature-enables predictive thermal management. |
Applications
| DTV LCD Panel Power | Set-Top Box Multi-Rail Supply |
|---|---|
Use Scenario: Powers main SoC core (1.2 V), DDR memory (1.5 V), and video processing I/O (2.5 V) from single 12-V input rail. IC Role / Device Role / Timing Role: Triple-buck regulator providing synchronized, phase-shifted outputs with I²C-adjustable voltages for dynamic power states. Use Value: Reduces component count vs discrete solutions; eliminates need for external sequencing ICs or voltage margining resistors. |
Use Scenario: Supplies tuners, demodulators, and HDMI PHYs with independent, tightly regulated rails in compact consumer enclosure. IC Role / Device Role / Timing Role: Centralized power manager delivering 3-A core rail and two 2-A auxiliary rails with thermal-aware shutdown. Use Value: Enables fanless thermal design via junction-temp monitoring and automatic hiccup-mode recovery during transient overloads. |
| Home Gateway Baseband | IP Surveillance Camera SoM |
Use Scenario: Powers dual-core ARM processor, Wi-Fi/BT combo chip, and Ethernet PHY from 12-V PoE-derived input. IC Role / Device Role / Timing Role: I²C-configurable triple buck supporting dynamic voltage/frequency scaling (DVFS) based on traffic load. Use Value: Achieves >85% efficiency at light load via pulse-skipping mode (PSM); configurable via host SoC without hardware change. |
Use Scenario: Delivers clean, sequenced power to image sensor, ISP, and video encoder in space-constrained outdoor camera housing. IC Role / Device Role / Timing Role: High-reliability power IC with monotonic startup, pre-bias tolerance, and overtemperature lockout. Use Value: Prevents sensor corruption during cold-start; thermal shutdown + 20°C hysteresis avoids cycling in high-ambient environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65261RHB | Includes open-drain RESET signal for input power failure detection; identical 3-A/2-A/2-A output capability and I²C VID control. | Required where system-level brownout detection and coordinated reset assertion are needed. | Select TPS65261RHB when input power monitoring and hardware reset generation are mandatory. |
| TPS65288RHB | Adds dual USB power switches (1.2-A current limit, trimmable up to 2.2 A); same triple-buck topology but no LDOs or V7V regulator. | Suitable for designs integrating USB host ports needing overcurrent protection and intelligent power control. | Choose TPS65288RHB only if USB switch functionality is required-otherwise TPS65263RHBR offers lower BOM cost and simpler layout. |
Compared with TPS65261RHB and TPS65288RHB, the TPS65263RHBR provides pure triple-buck functionality without added RESET or USB switches-making it optimal for cost-sensitive, space-constrained applications where those features are unnecessary and minimal external component count is prioritized.
Availability
TPS65263RHBR is available at Aetrix Electronics and suitable for DTV LCD panels, set-top boxes, and home gateway systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS65263RHBR 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 high-volume manufacturing.
The TPS65263RHBR belongs to TI's multi-output DC/DC converter product line, engineered specifically for compact, high-efficiency power delivery in consumer video and networking equipment with stringent thermal and sequencing requirements.
FAQ
What is the input voltage range supported by the TPS65263RHBR?
The TPS65263RHBR supports a continuous input voltage range of 4.5 V to 18 V, covering standard intermediate bus voltages including 5 V, 9 V, 12 V, and 15 V. This wide range allows direct operation from common wall adapters, PoE-derived supplies, or battery-based systems without pre-regulation. Absolute maximum rating is 20 V for transient conditions under 20 ns.
How does the TPS65263RHBR implement dynamic voltage scaling?
The TPS65263RHBR uses an I²C-compatible interface to program 7-bit VID codes that adjust each buck's output voltage from 0.68 V to 1.95 V in precise 10-mV steps. Voltage transitions are slew-rate controlled via 3-bit I²C registers to minimize overshoot/undershoot. The TPS65263RHBR also supports real-time read-back of power-good status and die temperature during scaling events.
Does the TPS65263RHBR support power sequencing between its three outputs?
Yes-the TPS65263RHBR supports flexible power sequencing through independent ENx and SSx pins for each buck. Soft-start timing is set per channel using external capacitors on SS1–SS3, and enable signals can be asserted in any order. Additionally, I²C commands allow software-controlled staggered startup, making the TPS65263RHBR suitable for complex SoC power-up sequences without external timers.
What thermal protection mechanisms are built into the TPS65263RHBR?
The TPS65263RHBR includes junction-temperature sensing with a 160°C shutdown threshold and 20°C hysteresis. When overheating occurs, the device halts switching and automatically restarts once temperature falls below 140°C. Thermal status is readable via I²C register, enabling host firmware to throttle loads proactively. The RHB package's exposed thermal pad must be soldered to PCB ground for effective heat dissipation.
Can the TPS65263RHBR operate with pre-biased outputs during startup?
Yes-the TPS65263RHBR is designed for monotonic startup into pre-biased loads. Its current-mode architecture and internal control logic prevent reverse current flow when output capacitors are already charged, eliminating risk of damage or system instability during hot-plug or partial-power-up conditions. This behavior is inherent to the TPS65263RHBR and requires no external circuitry or configuration.
TPS65263RHBR 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:
- Programmable
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.68V
- Voltage - Output (Max):
- 6.3V
- Current - Output:
- 3A, 2A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (5x5)
TPS65263RHBR FAQ
1.How can I place an order for TPS65263RHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65263RHBR 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 TPS65263RHBR reliable?
The price and inventory of TPS65263RHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65263RHBR is usually 5 days.
3.What payment methods are accepted for TPS65263RHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65263RHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65263RHBR?
TPS65263RHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65263RHBR 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 TPS65263RHBR?
For technical support, including TPS65263RHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65263RHBR requirements.
6.How does Aetrix verify that TPS65263RHBR is sourced from the original manufacturer or authorized distributors?
All TPS65263RHBR 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 TPS65263RHBR meets industry standards.
7.What is the process for return or replacement of TPS65263RHBR?
All TPS65263RHBR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65263RHBR, 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 TPS65263RHBR part is unused and in its original packaging.
Return procedure for TPS65263RHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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