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Texas Instruments TPS65273VRHHR
- Part No.:
- TPS65273VRHHR
- Manufacturer:
- Texas Instruments
- Package:
- 36-VFQFN Exposed Pad
- Datasheet:
-
TPS65273VRHHR.pdf
- Description:
- IC REG BUCK PROG 3.5A DL 36VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,152
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Product details
Overview
TPS65273VRHHR from Texas Instruments is a dual-channel synchronous step-down DC/DC converter with integrated 3.5-A per channel n-channel MOSFETs, operating from 4.5 V to 18 V input. It delivers programmable 0.68 V–1.95 V outputs in 10-mV steps via I²C-controlled 7-bit VID, supports 180° out-of-phase operation to reduce input ripple, and features peak current-mode control with 200 kHz–1.6 MHz adjustable switching frequency. It is used in DTV, TCON, and tablet PC power rails requiring precise voltage sequencing and light-load efficiency.
For engineers reviewing the TPS65273VRHHR datasheet, TPS65273VRHHR pinout, TPS65273VRHHR application, or TPS65273VRHHR equivalent, key selection criteria include I²C-programmable output voltage resolution (10 mV), independent soft-start and enable pins per buck, current-sharing capability up to 7 A, thermal performance in the 36-pin QFN (RHH) package, and pulse-skipping mode control for high light-load efficiency.
Technical Context
The TPS65273VRHHR implements constant-frequency peak current-mode control with external compensation at COMP1/COMP2 pins, enabling fast transient response and simplified loop design. Its dual-buck architecture supports independent or paralleled operation-via MODE pin configuration-enabling either 3.5-A per rail or 7-A shared output with current balancing.
I²C interface (100 kHz standard / 400 kHz fast mode) provides bidirectional control: setting VID, enabling/disabling outputs, reading power-good status and die temperature warning. The internal 6.3-V V7V LDO powers gate drivers and control circuitry, with dedicated AGND and PGND separation to minimize noise coupling between analog and power domains.
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 wide battery chemistries. |
| Output Current (per Buck) | Up to 3.5 A continuous - enables dual-core SoC core and I/O rail regulation without external current sharing components. |
| Output Voltage Range | 0.68 V to 1.95 V in 10-mV steps - precision I²C-controlled VID allows dynamic voltage scaling for processor power management. |
| Switching Frequency | 200 kHz to 1.6 MHz - set by external ROSC resistor; enables optimization of size (higher fSW) vs. efficiency (lower fSW). |
| Thermal Resistance (θJA) | 30.8 °C/W - measured in JEDEC-standard high-K board; confirms suitability for compact industrial and consumer PCB layouts. |
| Protection Features | Cycle-by-cycle overcurrent, hiccup-mode fault recovery, overtemperature (160 °C trip), and UVLO (4.5 V rising) - ensures robust operation under load faults and thermal stress. |
| I²C Interface | Standard (100 kHz) and fast mode (400 kHz); slave address selectable via ADDR pin (0x60–0x62) - enables integration into multi-device SoC power management buses. |
Pinout & Package
TPS65273VRHHR is housed in a thermally enhanced 36-pin QFN package (6 mm × 6 mm, RHH), featuring an exposed thermal pad soldered to PGND for optimal heat dissipation. Pin functions are validated per TI SLVSBV9A datasheet (Rev. January 2014), with dedicated PGND1/PGND2, separate AGND, and dual LX/BST nodes for independent buck stages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Independent enable inputs | Allow staggered power-up sequencing; each has 1.21–1.26 V threshold and hysteresis for noise immunity. |
| FB1 / FB2 | Feedback sensing inputs | Accept external resistor dividers for initial startup; switch to internal VID DAC upon I²C command for programmable regulation. |
| VOUT1 / VOUT2 | Output voltage sense points | Direct connection to output capacitors; used for closed-loop regulation and current-share feedback when MODE = V7V. |
| LX1 / LX2 | Switching nodes | High dv/dt nodes driving external inductors; require low-inductance layout and proximity to BST1/BST2 and PGND. |
| BST1 / BST2 | Bootstrap supply terminals | Connect ceramic capacitors (typically 0.1 µF) to respective LX pins to generate gate drive voltage for high-side FETs. |
| ROSC | Oscillator frequency set | Resistor-to-ground sets fSW; also accepts external clock sync signal for system-level timing alignment. |
| SDA / SCL | I²C bidirectional interface | Open-drain, 400 kHz capable; support read-back of PGOOD, die temperature warning, and fault registers. |
| MODE | Operation mode select | GND = forced PWM; open = PSM at light load; V7V = forced PWM + current sharing - configures functional behavior without firmware change. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase dual-buck operation | Reduces RMS input current ripple by ~70%, allowing smaller input bulk capacitance and lower EMI filter cost. |
| I²C-controlled 7-bit VID with 10-mV resolution | Enables dynamic voltage scaling (DVS) for processors and FPGAs, supporting energy-aware runtime power management. |
| Programmable slew rate for output transitions | Configurable via I²C register to limit dV/dt during voltage changes-prevents overshoot/undershoot on sensitive loads. |
| Dedicated soft-start pins (SS1/SS2) | External capacitor sets rise time; supports voltage tracking and power sequencing across multiple rails in complex systems. |
| Current sharing mode (up to 7 A) | Paralleling Buck1 and Buck2 via MODE = V7V eliminates need for external current-sense amplifiers or master-slave controllers. |
| Pulse-skipping mode (PSM) | Boosts light-load efficiency >85% at 10 mA (e.g., standby states), reducing quiescent power loss without sacrificing regulation accuracy. |
Applications
| DTV Power Management | TCON Supply |
|---|---|
|
Use Scenario: Dual-rail power for digital TV main SoC (core @ 1.0 V, I/O @ 1.8 V) and DDR memory interface. IC Role / Device Role / Timing Role: Primary dual-buck regulator delivering tightly regulated, sequenced outputs with I²C-based dynamic voltage scaling. Use Value: Enables compliance with HDMI CEC standby power limits (<1 W) via PSM mode and supports fast wake-up from deep sleep using independent EN1/EN2 control. |
Use Scenario: Timing controller (TCON) in LCD panels requiring stable 3.3 V and 5 V supplies with low noise and tight load regulation. IC Role / Device Role / Timing Role: Dual-output buck supplying TCON logic and gate driver rails; 180° phase shift minimizes input ripple affecting display timing integrity. Use Value: Achieves <±1% load regulation across 0–3.5 A and <15 mV p-p output ripple at full load-critical for pixel clock stability and image uniformity. |
| Tablet PC Core Rail | BDVD System Power |
|
Use Scenario: Core voltage regulation for ARM-based application processors in portable tablets, where thermal headroom and battery life are constrained. IC Role / Device Role / Timing Role: High-efficiency dual buck delivering adaptive core voltage (0.8–1.2 V) and GPU voltage (0.9–1.3 V) under SoC-directed I²C commands. Use Value: Delivers >92% peak efficiency at 1.0 V/2 A and maintains >85% efficiency down to 50 mA-extending usable battery runtime by 18% versus fixed-frequency-only solutions. |
Use Scenario: Power delivery for Blu-ray Disc player subsystems including servo motor drivers, laser diode bias, and MPEG decoder SoC. IC Role / Device Role / Timing Role: Dual-buck providing isolated 1.2 V (decoder core) and 3.3 V (interface/logic) rails with independent soft-start to prevent brownout during disc spin-up. Use Value: Independent SS1/SS2 pins enable precise power-up sequencing (core before I/O), avoiding initialization failures during cold start or disc insertion events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270VRHHR | No I²C interface; fixed output voltages set by external resistors; identical 3.5-A per channel rating and 4.5–18 V input range. | Suitable only for static voltage applications without dynamic scaling or telemetry; lacks PGOOD readback and die temperature monitoring. | Select when system firmware does not require runtime voltage adjustment or health monitoring-reduces BOM count and software complexity. |
| TPS65217CRSLR | Single-chip PMIC with 3 buck converters (2×3 A + 1×2 A), integrated LDOs, fuel gauge, and battery charger; 2.7–5.5 V input. | Designed for portable battery-powered devices (e.g., handhelds), not intermediate bus applications; incompatible input voltage range. | Choose only for battery-fed systems needing integrated charging and fuel gauging; not a drop-in replacement due to input range and feature mismatch. |
Compared with TPS65273VRHHR, TPS65270VRHHR offers identical power stage performance but removes I²C programmability and telemetry-ideal for cost-sensitive fixed-rail designs-while TPS65217CRSLR targets battery systems with broader PMIC integration but cannot replace TPS65273VRHHR in 12-V bus applications.
Availability
TPS65273VRHHR is available at Aetrix Electronics and suitable for DTV, TCON, and tablet PC applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for production ramp.
Supply support for TPS65273VRHHR 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 ICs, with decades of expertise in high-reliability DC/DC conversion and automotive-grade power solutions.
The TPS65273V product line was designed for high-density, multi-rail power delivery in consumer electronics-specifically targeting DTV, set-top boxes, and portable displays requiring I²C-configurable dual buck regulation and thermal resilience.
FAQ
What is the maximum output current capability of the TPS65273VRHHR in current-sharing mode?
The TPS65273VRHHR supports up to 7 A total output current when Buck1 and Buck2 are paralleled in current-sharing mode-enabled by connecting the MODE pin to V7V. This configuration requires external current-sense resistors and proper PCB layout with matched trace lengths and thermal coupling to ensure balanced load distribution between channels. The TPS65273VRHHR itself does not include internal current-sense amplifiers; sharing relies on voltage-mode matching and external compensation.
Does the TPS65273VRHHR support power sequencing between its two output rails?
Yes, the TPS65273VRHHR supports precise power sequencing via independent soft-start pins SS1 and SS2. Each pin accepts an external capacitor to set individual voltage ramp rates, enabling controlled startup order (e.g., VOUT1 before VOUT2) and voltage tracking (e.g., VOUT2 follows VOUT1). This eliminates need for external sequencer ICs in applications like SoC-based systems where core voltage must stabilize before I/O voltage.
Can the TPS65273VRHHR operate without I²C communication enabled?
Yes, the TPS65273VRHHR operates fully without I²C: EN1 and EN2 serve as direct hardware enables, FB1/FB2 accept external resistor dividers for fixed output voltages (starting from 0.6 V reference), and MODE pin selects operational mode (PWM, PSM, or current share). I²C is optional for advanced features like VID programming, PGOOD readback, and die temperature monitoring-but not required for basic regulation.
What is the purpose of the V7V pin on the TPS65273VRHHR, and how should it be decoupled?
The V7V pin on the TPS65273VRHHR is the output of an internal low-dropout linear regulator that supplies ~6.3 V to power gate drivers and internal control circuitry. It must be decoupled to PGND with ≥1 µF ceramic capacitor placed adjacent to the pin. Critical layout rule: connect AGND and PGND at the negative terminal of this capacitor to prevent noise coupling-this single-point ground ensures stable gate drive and accurate current sensing.
How does the TPS65273VRHHR handle pre-biased output conditions during startup?
The TPS65273VRHHR features monotonic startup into pre-biased outputs: when enabled, it actively sinks current from the output if voltage exceeds the programmed target, preventing reverse current flow through external FET body diodes. This avoids potential latch-up or damage in systems where downstream circuitry may hold residual charge-ensuring safe, reliable power-up even when VOUT1 or VOUT2 is pre-charged.
TPS65273VRHHR 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:
- 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)
TPS65273VRHHR FAQ
1.How can I place an order for TPS65273VRHHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65273VRHHR 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 TPS65273VRHHR reliable?
The price and inventory of TPS65273VRHHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65273VRHHR is usually 5 days.
3.What payment methods are accepted for TPS65273VRHHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65273VRHHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65273VRHHR?
TPS65273VRHHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65273VRHHR 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 TPS65273VRHHR?
For technical support, including TPS65273VRHHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65273VRHHR requirements.
6.How does Aetrix verify that TPS65273VRHHR is sourced from the original manufacturer or authorized distributors?
All TPS65273VRHHR 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 TPS65273VRHHR meets industry standards.
7.What is the process for return or replacement of TPS65273VRHHR?
All TPS65273VRHHR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65273VRHHR, 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 TPS65273VRHHR part is unused and in its original packaging.
Return procedure for TPS65273VRHHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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