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Texas Instruments TPS65276VDAPR
- Part No.:
- TPS65276VDAPR
- Manufacturer:
- Texas Instruments
- Package:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TPS65276VDAPR.pdf
- Description:
- IC REG BUCK PROG DL 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,636
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Product details
Overview
TPS65276VDAPR 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 from a 4.5–18 V input. 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 - deployed in DTV, TCON, and tablet PC power rails.
For engineers reviewing the TPS65276VDAPR datasheet, TPS65276VDAPR pinout, TPS65276VDAPR application, or TPS65276VDAPR equivalent, key selection criteria include I²C programmability, independent soft-start/enable per channel, thermal shutdown (160°C trip), hiccup-mode overcurrent protection, and 32-pin HTSSOP (DAP) package with exposed thermal pad for industrial-grade thermal management.
Technical Context
The TPS65276VDAPR implements constant-frequency peak current-mode control with external compensation via COMP1/COMP2 pins, enabling stable loop design across 200 kHz–1.6 MHz switching frequencies set by ROSC. Its dual-buck architecture supports 180° phase shift to reduce input ripple and EMI, while internal V7V LDO (6.3 V, 200 mA) powers gate drivers and control circuitry.
I²C interface (100/400 kHz) enables real-time readback of power-good status, die temperature warning, and VID voltage selection - with dedicated EN1/EN2 pins allowing standalone operation when I²C is unused. Each buck includes cycle-by-cycle overcurrent protection, low-side reverse current limiting, and monotonic startup into pre-biased loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports common intermediate bus rails (9 V, 12 V, 15 V) and wide-input battery systems. |
| Buck 1 Output Current | Up to 6 A continuous - sufficient for core logic or SoC VDD rails requiring high-current, low-noise regulation. |
| Buck 2 Output Current | Up to 3.5 A continuous - optimized for memory, I/O, or auxiliary domain supplies in multi-rail systems. |
| Output Voltage Range (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 resistor to balance efficiency, size, and EMI in layout-constrained designs. |
| Thermal Protection | 160°C trip with 20°C hysteresis - automatic hiccup-mode recovery prevents thermal runaway during sustained overload. |
| I²C Interface Speed | Standard (100 kHz) and Fast Mode (400 kHz) - compatible with most host controllers without timing margin concerns. |
Pinout & Package
TPS65276VDAPR is housed in a 32-pin thermally enhanced HTSSOP (DAP) package with exposed power pad for PCB-level heat dissipation. Pin numbering follows top-view orientation; thermal pad must be soldered to PGND with multiple vias.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Enable control inputs | Dedicated per-buck enable with UVLO adjustment via external resistors - allows independent power sequencing without I²C. |
| FB1 / FB2 | Feedback reference inputs | Pre-set initial output voltage using external resistor dividers; transition to I²C-controlled VID after initialization. |
| VOUT1 / VOUT2 | Output voltage sensing nodes | Direct connection point for remote sensing; used for I²C readback of actual output voltage and PGOOD monitoring. |
| LX1 / LX2 | Switching node outputs | High dv/dt nodes connecting to external inductors; require tight layout with minimal trace length to reduce EMI and losses. |
| BST1 / BST2 | Bootstrap supply terminals | Connect ceramic capacitors (typically 0.1 µF) between BSTx and LXx to sustain high-side MOSFET gate drive above VIN. |
| ROSC | Oscillator frequency setting | Resistor-to-ground sets switching frequency; also accepts external clock for synchronization to system timing sources. |
| SDA / SCL | I²C bidirectional data/clock | Open-drain interface compliant with standard I²C protocols - supports status readback and dynamic voltage reconfiguration. |
| PGND1 / PGND2 / AGND | Ground references | Separate power grounds per buck minimize cross-talk; analog ground ties to V7V bypass capacitor for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase operation | Reduces RMS input current ripple by ~30%, lowering required input capacitance and minimizing conducted EMI at source. |
| Pulse skipping mode (PSM) | Enables >85% efficiency at light loads (<100 mA) without external control - selectable via MODE pin or I²C command. |
| Monotonic startup into pre-biased loads | Prevents reverse current flow during power-up when output rail is already charged - critical for hot-swap and multi-rail sequencing. |
| Integrated V7V LDO (6.3 V) | Supplies gate drive and bias internally; eliminates need for external bias supply while optimizing MOSFET RDS(on) performance. |
| Hiccup-mode overcurrent protection | Shuts down for 16384 cycles after 512-cycle fault detection - limits average power dissipation during short-circuit events. |
| Boot-LX UVLO monitoring | Maintains high-side gate drive integrity by forcing LX low to recharge bootstrap capacitor when BST–LX drops below 2.1 V. |
Applications
| DTV Power Management | TCON Supply |
|---|---|
|
Use Scenario: Dual-rail power for digital TV main processor (1.2 V) and video processing unit (1.8 V) under variable load conditions. IC Role / Device Role / Timing Role: Primary dual-output PMIC regulating core and I/O domains with I²C-based dynamic voltage scaling. Use Value: Enables adaptive power delivery matching CPU workload, reducing standby power by 22% versus fixed-output converters. |
Use Scenario: Precision timing controller (TCON) in LCD panels requiring tightly regulated 3.3 V and 5 V rails with low noise. IC Role / Device Role / Timing Role: Dual synchronous buck supplying TCON logic and interface circuits with 180° phase shift to suppress ripple coupling. Use Value: Achieves <15 mVpp output ripple at full load, meeting display panel EMI and image stability requirements. |
| Tablet PC Core Rail | Set-Top Box SoC |
|
Use Scenario: Main SoC core voltage (0.8–1.4 V) and GPU domain (1.1 V) in portable tablet platforms with battery input. IC Role / Device Role / Timing Role: I²C-programmable dual buck supporting DVFS and independent soft-start for staggered power-up. Use Value: Delivers 92% peak efficiency at 1.2 V/4 A, extending battery runtime by 18 minutes per charge cycle. |
Use Scenario: Multi-core media processor in cable/satellite STB requiring sequenced 1.0 V, 1.2 V, and 3.3 V supplies. IC Role / Device Role / Timing Role: Dual-buck regulator with SS1/SS2 pins enabling precise power-up sequencing across voltage domains. Use Value: Eliminates need for external sequencing ICs, reducing BOM count by 3 components and board area by 12 mm². |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65276VRHHR | Same silicon, 36-pin QFN (6×6 mm) package with lower θJA (30.8°C/W vs. 35°C/W) and no exposed DAP pad. | Better thermal performance in space-constrained layouts; requires different PCB footprint and reflow profile. | Select when higher power density and improved thermal resistance outweigh HTSSOP's cost and assembly simplicity. |
| TPS65273VRHHR | Pin-compatible variant with identical pinout but fixed 1.2 V/1.8 V outputs (no I²C VID); lacks V7V LDO and ROSC frequency tuning. | Suitable only for static-voltage applications; no dynamic voltage scaling or external frequency adjustment capability. | Choose only if I²C control, programmable frequency, and flexible output voltage are unnecessary - reduces firmware complexity. |
Compared with TPS65276VDAPR, the TPS65276VRHHR offers superior thermal performance in compact layouts, while the TPS65273VRHHR sacrifices programmability for simplified fixed-output use - making TPS65276VDAPR the optimal choice for I²C-managed, thermally demanding, multi-rail embedded systems.
Availability
TPS65276VDAPR is available at Aetrix Electronics and suitable for DTV, TCON, and tablet PC power management applications requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.
Supply support for TPS65276VDAPR 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 decades of expertise in high-reliability power conversion ICs.
The TPS65276V product line delivers dual-output, I²C-programmable buck converters for consumer and industrial applications where dynamic voltage scaling, thermal robustness, and multi-rail sequencing are essential.
FAQ
What is the maximum continuous output current supported by each channel of the TPS65276VDAPR?
The TPS65276VDAPR supports up to 6 A continuous output current on Buck 1 and 3.5 A on Buck 2 under recommended operating conditions (TA ≤ 85°C, proper thermal layout). These ratings assume adequate PCB copper area, thermal vias to internal ground planes, and airflow - exceeding them risks thermal shutdown activation or reduced reliability. The TPS65276VDAPR datasheet specifies ILIMIT1 = 8 A and ILIMIT2 = 5 A peak current thresholds before hiccup-mode protection engages.
How does the I²C interface of the TPS65276VDAPR enable dynamic voltage scaling?
The TPS65276VDAPR uses its 7-bit VID register to program output voltages from 0.68 V to 1.95 V in precise 10-mV steps per buck channel. A host processor sends an I²C write command to update the VID value, triggering controlled slew-rate transitions (e.g., 10 mV/16 switching cycles for Buck 1). This allows real-time adaptation of core voltage to computational load - the TPS65276VDAPR implements this without external DACs or resistor networks, simplifying DVFS implementation in SoC-based systems.
Can the TPS65276VDAPR operate with a pre-biased output voltage during startup?
Yes, the TPS65276VDAPR supports monotonic startup into pre-biased loads - a critical feature for hot-swap and multi-rail systems. Its control architecture prevents reverse current flow by disabling the high-side MOSFET until the feedback voltage rises above the internal reference. This behavior is inherent to the device's design and requires no external circuitry or configuration. Engineers can rely on this capability in applications like server backplanes or modular displays where output rails may retain residual voltage during power cycling.
What thermal management considerations apply to the TPS65276VDAPR in the HTSSOP (DAP) package?
The TPS65276VDAPR in HTSSOP (DAP) package requires direct soldering of the exposed thermal pad to a large PGND copper area with ≥6 thermal vias (0.3 mm diameter) to an internal ground plane. TI specifies θJA = 35°C/W under JEDEC high-K board conditions - derating is necessary for enclosed or still-air environments. Thermal shutdown activates at 160°C junction temperature with 20°C hysteresis; maintaining TJ < 125°C ensures long-term reliability. The TPS65276VDAPR's thermal pad is electrically connected to PGND, not isolated.
Does the TPS65276VDAPR support external clock synchronization, and how is it implemented?
Yes, the TPS65276VDAPR supports external clock synchronization via the ROSC pin. When an external clock signal (200–1600 kHz) is applied to ROSC, the internal PLL locks to its falling edge, aligning both buck channels' switching edges. This eliminates beat frequencies in multi-converter systems and simplifies EMI filter design. Unlike resistor-based frequency setting, synchronization requires no additional components beyond the clock source - the TPS65276VDAPR automatically disables its internal oscillator upon detecting a valid external clock.
TPS65276VDAPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- 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:
- 32-HTSSOP
TPS65276VDAPR FAQ
1.How can I place an order for TPS65276VDAPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65276VDAPR 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 TPS65276VDAPR reliable?
The price and inventory of TPS65276VDAPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65276VDAPR is usually 5 days.
3.What payment methods are accepted for TPS65276VDAPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65276VDAPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65276VDAPR?
TPS65276VDAPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65276VDAPR 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 TPS65276VDAPR?
For technical support, including TPS65276VDAPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65276VDAPR requirements.
6.How does Aetrix verify that TPS65276VDAPR is sourced from the original manufacturer or authorized distributors?
All TPS65276VDAPR 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 TPS65276VDAPR meets industry standards.
7.What is the process for return or replacement of TPS65276VDAPR?
All TPS65276VDAPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65276VDAPR, 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 TPS65276VDAPR part is unused and in its original packaging.
Return procedure for TPS65276VDAPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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