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Texas Instruments TPS65276VRHHT
- Part No.:
- TPS65276VRHHT
- Manufacturer:
- Texas Instruments
- Package:
- 36-VFQFN Exposed Pad
- Datasheet:
-
TPS65276VRHHT.pdf
- Description:
- IC REG BUCK PROG DL 36VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,021
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Product details
Overview
TPS65276VRHHT from Texas Instruments is a dual-channel synchronous step-down DC/DC converter with integrated high- and low-side MOSFETs, delivering up to 6 A on Buck 1 and 3.5 A on Buck 2 across a 4.5–18 V input range. It features I²C-controlled 7-bit VID programming (0.68–1.95 V in 10-mV steps), 180° out-of-phase operation, and peak current-mode control for fast transient response - used in DTV, TCON, and tablet PC power rails.
For engineers reviewing the TPS65276VRHHT datasheet, TPS65276VRHHT pinout, TPS65276VRHHT application, or TPS65276VRHHT equivalent, key selection considerations include I²C programmability, independent soft-start/enable per channel, thermal shutdown at 160°C, 200–1600 kHz adjustable switching frequency, and QFN-36 (RHH) package compatibility with high-current PCB layouts.
Technical Context
The TPS65276VRHHT implements constant-frequency peak current-mode control with external compensation via COMP1/COMP2 pins, enabling stable loop design across wide load and line variations. Its dual-buck architecture supports 180° phase shift to reduce input ripple and EMI, while dedicated ROSC pin allows resistor-based frequency setting or external clock synchronization.
I²C interface (100/400 kHz) enables real-time voltage programming, power-good status readback, die temperature monitoring, and mode control (PWM vs. pulse-skipping). Each buck has independent EN/SS pins for sequencing, and internal 6.3-V V7V LDO powers gate drivers - decoupled via ≥1 µF ceramic capacitor to PGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports common intermediate bus voltages (9 V, 12 V, 15 V) and battery-derived supplies. |
| Output Current (Buck 1 / Buck 2) | 6 A continuous / 3.5 A continuous - enables single-chip dual-rail power for SoC core and I/O domains. |
| Output Voltage Range (I²C VID) | 0.68 V to 1.95 V in 10-mV steps - precise digital control for dynamic voltage scaling in processors and FPGAs. |
| Switching Frequency | 200 kHz to 1.6 MHz - adjustable via ROSC pin resistor; enables optimization of efficiency vs. size for output inductors/capacitors. |
| Thermal Shutdown Threshold | 160°C trip with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed industrial designs. |
| I²C Interface Speed | Standard (100 kHz) and Fast Mode (400 kHz) - compatible with most microcontrollers and PMIC managers without timing constraints. |
| Package | 36-pin QFN (6 mm × 6 mm, RHH) with exposed thermal pad - supports >3 A/W junction-to-board thermal resistance for high-power density layouts. |
Pinout & Package
TPS65276VRHHT uses a 36-pin QFN package (RHH) with 0.5-mm pitch and thermally enhanced exposed pad. The package is optimized for high-current power delivery and thermal dissipation in space-constrained applications such as display TCON boards and portable computing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Enable inputs | Dedicated hardware enable for each buck; supports UVLO adjustment via external resistors or automatic startup with internal pull-up. |
| FB1 / FB2 | Feedback sensing | Analog voltage divider inputs for initial startup; switch to internal VID DAC upon I²C command - enables hybrid analog/digital configuration. |
| VOUT1 / VOUT2 | Output voltage sense | Direct connection point for remote sensing; required when using I²C VID mode - ensures accurate regulation under load-induced IR drop. |
| BST1 / BST2 | Bootstrap supply | Connects to LX node via 0.1-µF ceramic capacitor; sustains high-side gate drive voltage during duty cycles >90%. |
| LX1 / LX2 | Switching node | High-current drain-source path for integrated n-MOSFETs; requires low-inductance layout and Kelvin connection to minimize ringing. |
| PGND1 / PGND2 | Power ground | Separate ground returns for each buck's power stage - prevents cross-talk and improves current measurement accuracy. |
| SDA / SCL | I²C interface | Open-drain bidirectional data/clock lines; require 2.2–10 kΩ pull-ups to DVCC (3.3 V) per I²C specification. |
| ROSC | Oscillator control | Resistor-to-ground sets switching frequency; also accepts external clock signal for system-level synchronization. |
| SS1 / SS2 | Soft-start/tracking | Capacitor-connected pin controls voltage ramp rate; supports power sequencing with other rails via external voltage dividers. |
| AGND | Analog reference ground | Isolated return for error amplifiers and ADCs; must tie to PGND at single point near V7V bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase operation | Reduces RMS input current by ~30%, allowing smaller input bulk capacitors and lower conducted EMI in shared input buses. |
| Pulse-skipping mode (PSM) | Enables >85% efficiency at loads <100 mA per channel - critical for standby power compliance in consumer electronics. |
| Integrated V7V LDO (6.3 V) | Provides regulated gate-drive bias independent of VIN; eliminates need for external bootstrap supply and simplifies layout. |
| Cycle-by-cycle overcurrent protection | Trips at 8 A (Buck 1) and 5 A (Buck 2) peak inductor current - prevents MOSFET failure during short-circuit or startup into pre-biased loads. |
| Hiccup-mode fault recovery | Shuts down for 16384 cycles after 512 consecutive overcurrent events - limits average power dissipation during sustained faults. |
| Power-good status readback | I²C-accessible register reports PGOOD assertion (±5% window around setpoint) and die temperature warning (>125°C). |
Applications
| DTV Power Management | TCON Board Supply |
|---|---|
|
Use Scenario: Dual-rail power for main SoC (1.2 V) and video processing unit (1.8 V) in digital television platforms. IC Role / Device Role / Timing Role: Primary DC/DC regulator providing tightly regulated, sequenced outputs with I²C telemetry for firmware-controlled voltage scaling. Use Value: Enables dynamic power management during channel changes and picture-in-picture modes without external sequencer ICs. |
Use Scenario: Powering timing controller ICs and source/gate driver ICs in LCD/LED display modules. IC Role / Device Role / Timing Role: Dual-output buck supplying VDD (3.3 V) and AVDD (5 V) with independent soft-start to prevent panel latch-up. Use Value: Eliminates discrete regulators and reduces BOM count by 4+ components while maintaining ±1% output accuracy under load transients. |
| Tablet PC Core Rail | Set-Top Box SoC Supply |
|
Use Scenario: Core voltage rail (0.8–1.1 V) and I/O rail (1.8 V) for ARM-based application processors in portable tablets. IC Role / Device Role / Timing Role: I²C-programmable buck delivering adaptive voltage scaling synchronized to CPU workload via PMIC manager. Use Value: Achieves >90% efficiency at 2–4 A loads and supports rapid VID transitions (<100 µs) for real-time DVFS response. |
Use Scenario: Main processor (1.2 V) and memory interface (1.5 V) rails in cable/satellite set-top boxes with thermal constraints. IC Role / Device Role / Timing Role: Thermally robust dual-buck converter with 160°C shutdown and hiccup-mode protection for unventilated enclosures. Use Value: Maintains reliable operation at 70°C ambient with no derating - validated per JEDEC JESD51-2a thermal simulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65273VRHHR | Same pinout and feature set but lacks I²C VID programming; uses fixed resistor-divider feedback only. | Suitable for cost-sensitive designs where voltage flexibility is not required and firmware control is unnecessary. | Select TPS65276VRHHT when dynamic voltage scaling or telemetry (PGOOD, temp) is needed; choose TPS65273VRHHR for static-rail simplicity. |
| MP2491DS-LF-Z | Single-channel 6-A buck with external MOSFETs; no I²C, no integrated V7V LDO, no phase-shift capability. | Requires two separate ICs and additional gate drivers to replicate dual-rail functionality - increases layout complexity and component count. | TPS65276VRHHT provides higher integration, better thermal performance, and lower total solution size than dual MP2491 implementations. |
Compared with TPS65273VRHHR and MP2491DS-LF-Z, the TPS65276VRHHT uniquely combines I²C programmability, dual-channel phase-shifted operation, and integrated gate-drive bias - reducing bill-of-materials count by 7+ passive components and enabling firmware-controlled power states in compact form factors.
Availability
TPS65276VRHHT is available at Aetrix Electronics and suitable for DTV, TCON, and tablet PC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for TPS65276VRHHT 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 over 50 years of innovation in high-reliability power conversion ICs.
The TPS65276V product line delivers highly integrated dual-buck converters for consumer and industrial display systems, designed to replace multi-IC power solutions with single-package efficiency, programmability, and thermal resilience.
FAQ
What is the maximum output current supported by each channel of the TPS65276VRHHT?
The TPS65276VRHHT supports up to 6 A continuous output current on Buck 1 and 3.5 A continuous on Buck 2 under typical thermal conditions (TA = 85°C, 2-layer PCB with thermal vias). Peak inductor current limits are 8 A (Buck 1) and 5 A (Buck 2), verified per TI SLVSBW0B datasheet Section 7.5.
How does the I²C interface of the TPS65276VRHHT support voltage programming and status monitoring?
The TPS65276VRHHT uses standard-mode (100 kHz) and fast-mode (400 kHz) I²C to program 7-bit VID codes (0x00–0x7F) for 0.68–1.95 V outputs in 10-mV steps, read back PGOOD status, monitor die temperature warnings (>125°C), and control pulse-skipping mode. Address is configurable via ADDR pin (0x60–0x62).
Can the TPS65276VRHHT operate with a 100% duty cycle, and what enables this capability?
Yes, the TPS65276VRHHT supports 100% duty cycle operation as long as the BST1/LX1 and BST2/LX2 bootstrap capacitor voltages remain above the 2.1 V BOOT-LX UVLO threshold. This is enabled by the internal boot recharge circuit that pulls LX low to refresh the bootstrap capacitor during low-duty-cycle intervals.
What thermal management features are built into the TPS65276VRHHT for high-power applications?
The TPS65276VRHHT includes thermal shutdown at 160°C with 20°C hysteresis, hiccup-mode recovery after overtemperature faults, and a low 30.8°C/W θJA (RHH package) achieved via exposed thermal pad soldering and PCB vias. Thermal warning flag is readable via I²C at 125°C.
How is switching frequency configured on the TPS65276VRHHT, and what is the valid range?
Switching frequency on the TPS65276VRHHT is set via an external resistor from ROSC pin to GND, supporting 200 kHz to 1.6 MHz. For example, a 100-kΩ resistor yields ~400 kHz. The ROSC pin also accepts external clock signals for synchronization, with minimum pulse width of 20 ns and frequency range matching the internal oscillator.
TPS65276VRHHT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 36-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.68V
- Voltage - Output (Max):
- 1.95V
- Current - Output:
- 6A, 3.5A
- Frequency - Switching:
- 200kHz ~ 1.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-VQFN (6x6)
TPS65276VRHHT FAQ
1.How can I place an order for TPS65276VRHHT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65276VRHHT 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 TPS65276VRHHT reliable?
The price and inventory of TPS65276VRHHT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65276VRHHT is usually 5 days.
3.What payment methods are accepted for TPS65276VRHHT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65276VRHHT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65276VRHHT?
TPS65276VRHHT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65276VRHHT 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 TPS65276VRHHT?
For technical support, including TPS65276VRHHT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65276VRHHT requirements.
6.How does Aetrix verify that TPS65276VRHHT is sourced from the original manufacturer or authorized distributors?
All TPS65276VRHHT 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 TPS65276VRHHT meets industry standards.
7.What is the process for return or replacement of TPS65276VRHHT?
All TPS65276VRHHT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65276VRHHT, 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 TPS65276VRHHT part is unused and in its original packaging.
Return procedure for TPS65276VRHHT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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