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Texas Instruments TPS65273VRHHT
- Part No.:
- TPS65273VRHHT
- Manufacturer:
- Texas Instruments
- Package:
- 36-VFQFN Exposed Pad
- Datasheet:
-
TPS65273VRHHT.pdf
- Description:
- IC REG BUCK PROG 3.5A DL 36VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:594
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Product details
Overview
TPS65273VRHHT from Texas Instruments is a dual-channel synchronous step-down DC/DC converter with integrated 3.5-A high-side and low-side n-MOSFETs per channel, operating from 4.5 V to 18 V input. It delivers independently 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 enables current sharing up to 7 A when paralleled - used in DTV, TCON, and tablet PC power rails.
For engineers reviewing the TPS65273VRHHT datasheet, TPS65273VRHHT pinout, TPS65273VRHHT application, or TPS65273VRHHT equivalent, key selection criteria include I²C-programmable output voltage slew rate control, peak current-mode regulation with external compensation, dedicated EN/SS pins for sequencing, thermal shutdown at 160°C, and QFN-36 (RHH) package compatibility with 0.7°C/W θJCbot for high-power density designs.
Technical Context
The TPS65273VRHHT implements constant-frequency peak current-mode control with independent error amplifiers (COMP1/COMP2), enabling fast transient response and simplified loop compensation using external RC networks. Its dual-buck architecture supports both independent operation and forced-current-sharing mode via MODE pin configuration.
I²C interface operates at standard (100 kHz) and fast (400 kHz) modes, supporting read-back of power-good status, die temperature warning (125°C threshold), and overcurrent fault flags. Switching frequency is set by ROSC pin resistor (200–1600 kHz) or synchronized to external clock with 66 ns delay from sync falling edge to LX rising edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports 9 V, 12 V, and 15 V intermediate bus systems without external pre-regulation. |
| Output Current per Channel | 3.5 A continuous - sufficient for core logic or memory rails in display timing controllers and media SoCs. |
| Output Voltage Range | 0.68 V to 1.95 V in 10-mV steps - matches modern processor I/O and core voltage requirements with fine-grained I²C control. |
| Switching Frequency | 200 kHz to 1.6 MHz - adjustable via ROSC resistor to optimize efficiency vs. size trade-off for inductors/capacitors. |
| Thermal Protection | 160°C trip with 20°C hysteresis - prevents latch-up during sustained overload while allowing safe recovery. |
| Package Thermal Resistance | θJCbot = 0.7°C/W - enables high-power dissipation through exposed thermal pad directly to PCB ground plane. |
| I²C Interface Speed | Up to 400 kHz - compatible with standard microcontroller I²C peripherals for real-time voltage/fault monitoring. |
Pinout & Package
TPS65273VRHHT is housed in a 36-pin QFN package (6 mm × 6 mm, RHH), featuring an exposed thermal pad soldered to PCB ground for optimal heat dissipation. Pin pitch is 0.5 mm; package conforms to JEDEC MO-220 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Internal LDO and controller supply | Provides bias for control circuitry; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| V7V | Internal 6.3-V LDO output | Powers gate drivers; regulates to ~6.3 V for optimal MOSFET RDS(on); requires local 1-µF bypass to PGND. |
| EN1 / EN2 | Independent enable inputs | Enable/disable Buck 1 or Buck 2 separately; threshold 1.21–1.26 V; supports sequencing without I²C. |
| FB1 / FB2 | Feedback reference inputs | Accept external resistor dividers for startup voltage setting before I²C VID activation (reference = 0.6 V). |
| VOUT1 / VOUT2 | Output voltage sensing nodes | Direct connection to output rail; used for closed-loop regulation and I²C-programmed VID tracking. |
| BST1 / BST2 | Bootstrap supply terminals | Connect 0.1 µF ceramic capacitor between BSTx and LXx to generate high-side gate drive voltage. |
| LX1 / LX2 | Power switch nodes | Connect to external inductors; switching node transitions define duty cycle; require tight layout to minimize EMI. |
| SS1 / SS2 | Soft-start and tracking inputs | Capacitor on SSx sets ramp time; overrides internal reference for power sequencing or voltage tracking. |
| COMP1 / COMP2 | Error amplifier compensation outputs | Connect Type II/III compensation network; determines loop stability and transient response bandwidth. |
| ROSC | Oscillator frequency programming | Resistor to GND sets fSW (200–1600 kHz); also accepts external sync clock signal. |
| SDA / SCL | I²C bidirectional data/clock | Supports standard/fast mode; open-drain with 4 mA sink capability; VIH = 1.3 V, VIL = 0.4 V. |
| ADDR | I²C slave address select | Configures device address as 0x60 (ADDR = low), 0x61 (ADDR = high), or 0x62 (ADDR = open). |
| MODE | Operation mode control | Ground = forced PWM; open = pulse-skipping mode (PSM); V7V = forced PWM + current sharing. |
| AGND / PGND1 / PGND2 | Analog and power grounds | Separate AGND and PGND planes required; single-point tie at V7V bypass capacitor negative terminal. |
| Thermal Pad | Exposed case ground | Must be soldered to PCB ground plane with ≥6 vias (0.3 mm diameter) for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-controlled 7-bit VID | Enables dynamic voltage scaling (DVS) across 0.68–1.95 V range in 10-mV increments for adaptive power management. |
| 180° out-of-phase dual-buck operation | Reduces RMS input current ripple by ~70%, lowering required input capacitance and system-level EMI filtering. |
| Current sharing mode (7-A total) | Paralleling Buck 1 and Buck 2 via MODE = V7V eliminates need for external current-sense resistors or master-slave ICs. |
| Pulse-skipping mode (PSM) | Boosts light-load efficiency >85% at 10 mA (e.g., standby states) without audible switching noise or output voltage overshoot. |
| Dedicated soft-start and enable pins | Allows independent power-up sequencing of multiple rails without firmware or external logic, critical for SoC boot integrity. |
| Cycle-by-cycle overcurrent protection | Triggers hiccup mode after 512 cycles (Thiccup_wait) and re-enables after 16384 cycles (Thiccup_re) to limit MOSFET stress. |
Applications
| DTV Power Management | TCON Supply |
|---|---|
|
Use Scenario: Dual-rail power for digital video processing unit and HDMI transmitter in flat-panel TVs. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.2 V @ 3.5 A (core) and 3.3 V @ 3.5 A (I/O) from 12-V bus. Use Value: I²C programmability allows firmware-controlled voltage scaling during content resolution changes, reducing dynamic power by up to 30%. |
Use Scenario: Precision analog and digital supply for timing controller in LCD/LED display modules. IC Role / Device Role / Timing Role: Generates stable 1.8 V (analog AVDD) and 3.3 V (digital DVDD) with <±0.5% load regulation. Use Value: 180° phase shift minimizes input ripple-induced jitter on LVDS clock lines, preserving display timing accuracy. |
| Tablet PC Core Rail | BDVD System-on-Chip |
|
Use Scenario: Core voltage regulation for ARM-based application processor during active and sleep states. IC Role / Device Role / Timing Role: Delivers 0.8 V @ 3.5 A (Buck 1) and 1.1 V @ 3.5 A (Buck 2) with PSM enabled below 100 mA. Use Value: Pulse-skipping mode achieves >90% efficiency at 20 mA load, extending battery life during idle periods without compromising wake latency. |
Use Scenario: Dual-output power for BD/DVD playback SoC with separate CPU, GPU, and memory domains. IC Role / Device Role / Timing Role: Provides 1.0 V @ 3.5 A (CPU) and 1.2 V @ 3.5 A (GPU) with independent enable/soft-start control. Use Value: Dedicated EN1/EN2 pins enable staggered power-up to avoid inrush current exceeding 5 A on 12-V supply rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543B20RHLT | Single-channel, 30-A capable with PMBus interface; no integrated current sharing; higher VIN max (20 V). | Requires two devices for dual-rail; lacks I²C VID granularity (12.5-mV steps); supports telemetry readback not available on TPS65273VRHHT. | Select when higher current per rail (>3.5 A) or PMBus telemetry is required; not suitable for space-constrained dual-rail layouts. |
| ISL95831IRZ | 3.5-A dual buck with SMBus interface; fixed 0.5-V to 1.5-V output range; no MODE pin for current sharing. | Supports only lighter loads (≤1.5 V); lacks 180° phase shift and external ROSC frequency tuning; lower thermal performance (θJCbot = 2.1°C/W). | Choose for cost-sensitive SMBus-only systems where voltage range and phase control are non-critical. |
Compared with TPS543B20RHLT and ISL95831IRZ, the TPS65273VRHHT uniquely combines I²C-programmable 10-mV-step VID, hardware current sharing, and 180° phase shift in a thermally optimized 36-pin QFN - making it optimal for compact, multi-rail consumer electronics requiring dynamic voltage scaling and EMI reduction.
Availability
TPS65273VRHHT is available at Aetrix Electronics and suitable for DTV, TCON, tablet PC, and BDVD applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS65273VRHHT 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-efficiency DC/DC conversion and automotive-grade reliability.
The TPS65273VRHHT belongs to TI's high-density dual-buck regulator product line, designed specifically for space-constrained consumer electronics requiring precise, software-controllable multi-rail power with minimal external components.
FAQ
What is the maximum output current per channel for the TPS65273VRHHT?
The TPS65273VRHHT delivers up to 3.5 A continuous output current per channel under typical thermal conditions (TA ≤ 85°C, proper PCB layout). When operated in current-sharing mode with MODE pin tied to V7V, the combined output reaches 7 A with matched inductor and output capacitor design. Peak inductor current limit is 5 A per channel, verified in electrical characteristics tables.
Does the TPS65273VRHHT support I²C read-back of fault status?
Yes, the TPS65273VRHHT supports I²C read-back of real-time fault status including power-good (PGOOD) flag, die temperature warning (trip at 125°C), and overcurrent detection flags for each buck channel. These registers are accessible via standard I²C commands without requiring additional GPIO monitoring.
Can the TPS65273VRHHT operate without I²C communication?
Yes, the TPS65273VRHHT can operate fully without I²C. Startup voltage is set by external feedback resistors (FB1/FB2) referenced to 0.6 V. EN1/EN2 pins provide hardware enable control, and MODE pin configures operation mode (PWM, PSM, or current sharing). I²C is optional for dynamic reconfiguration.
What is the recommended thermal pad layout for the TPS65273VRHHT?
The TPS65273VRHHT's exposed thermal pad must be soldered to a solid PCB ground plane with ≥6 thermal vias (0.3 mm diameter, filled or capped) placed within the pad area. TI recommends connecting the thermal pad directly to PGND1/PGND2 and avoiding splits between analog and power ground planes - tie them at the V7V bypass capacitor negative terminal.
How does the MODE pin affect TPS65273VRHHT functionality?
The MODE pin configures three distinct operating modes: grounded → forced PWM (no PSM); floating → pulse-skipping mode (PSM) for light-load efficiency; tied to V7V → forced PWM with current sharing enabled. In current-sharing mode, Buck 1 and Buck 2 synchronize and share load equally, delivering up to 7 A total with single-loop control.
TPS65273VRHHT 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)
TPS65273VRHHT FAQ
1.How can I place an order for TPS65273VRHHT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65273VRHHT 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 TPS65273VRHHT reliable?
The price and inventory of TPS65273VRHHT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65273VRHHT is usually 5 days.
3.What payment methods are accepted for TPS65273VRHHT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65273VRHHT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65273VRHHT?
TPS65273VRHHT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65273VRHHT 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 TPS65273VRHHT?
For technical support, including TPS65273VRHHT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65273VRHHT requirements.
6.How does Aetrix verify that TPS65273VRHHT is sourced from the original manufacturer or authorized distributors?
All TPS65273VRHHT 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 TPS65273VRHHT meets industry standards.
7.What is the process for return or replacement of TPS65273VRHHT?
All TPS65273VRHHT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65273VRHHT, 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 TPS65273VRHHT part is unused and in its original packaging.
Return procedure for TPS65273VRHHT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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