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Texas Instruments TPS54612PWPRG4
- Part No.:
- TPS54612PWPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54612PWPRG4.pdf
- Description:
- IC REG BUCK 1.2V 6A 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,609
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Product details
Overview
TPS54612PWPRG4 from Texas Instruments is a 3-V to 6-V input, 6-A synchronous buck PWM converter with integrated 30-mΩ high- and low-side MOSFETs, fixed 1.2-V output (±2% over temperature/load), internal compensation, and PowerPAD™ HTSSOP-28 package. It delivers point-of-load regulation for FPGAs and microprocessors in space-constrained industrial and telecom systems.
For engineers reviewing the TPS54612PWPRG4 datasheet, TPS54612PWPRG4 pinout, TPS54612PWPRG4 application, or TPS54612PWPRG4 equivalent, key selection factors include its 350/550 kHz fixed-frequency operation, 1.2-V ±2% output accuracy, thermal shutdown at 150°C, powergood monitoring, and compatibility with external frequency adjustment via RT resistor.
Technical Context
The TPS54612PWPRG4 implements a voltage-mode synchronous buck topology with an internally compensated error amplifier (3–5 MHz unity-gain bandwidth) and adaptive dead-time control to prevent shoot-through. Its PWM comparator features 70–85 ns propagation delay and 100 ns leading-edge blanking for robust current-limit response.
It integrates dual 30-mΩ MOSFETs rated for 12-A peak current, supports continuous conduction mode (CCM) across full 0–6 A load range, and uses a precision 0.891-V reference with <±0.005 V drift over –40°C to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 6.0 V - Supports direct regulation from 3.3-V or 5-V intermediate bus rails without pre-regulation. |
| Output Voltage | 1.2 V ±2% - Fixed output with 1.0% initial accuracy; stable under 0–6 A load and –40°C to 125°C TJ. |
| Continuous Output Current | 6 A - Delivers full-rated current with thermal derating per RθJA = 18.2°C/W (with solder). |
| Switching Frequency | 350 kHz or 550 kHz (internally set); 280–700 kHz (externally adjustable via RT resistor) - Enables EMI optimization and inductor size trade-offs. |
| Current Limit Threshold | 7.2–10 A (at VIN = 3 V); 10–12 A (at VIN = 6 V) - Cycle-by-cycle protection with 200 ns total response time. |
| Powergood Accuracy | VSENSE ≥90% Vref → PWRGD high; hysteresis = 3% Vref - Ensures reliable processor reset and supply sequencing. |
| Thermal Shutdown | 135–165°C trip point; 10°C hysteresis - Protects against sustained overload or poor PCB thermal design. |
Pinout & Package
TPS54612PWPRG4 is housed in a thermally enhanced 28-pin HTSSOP (PWP) PowerPAD™ package with exposed thermal pad soldered to AGND plane for optimal heat dissipation. Pin count and layout match TI's SWIFT™ family standard for drop-in compatibility across output voltage variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for SS/ENA capacitor, VBIAS bypass, RT/FSEL bias; must connect to PowerPAD for stability. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage feedback node; enables precise regulation and remote sensing. |
| PWRGD (Pin 4) | Open-drain powergood indicator | Signals valid output (VSENSE ≥90% Vref); pulled low during UVLO, shutdown, or thermal fault. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Requires 0.022–0.1 µF ceramic capacitor to PH; enables efficient gate drive of integrated high-side MOSFET. |
| PH (Pins 6–14) | Phase node | Internal switch node connecting MOSFETs and external inductor; multiple pins reduce parasitic inductance. |
| RT (Pin 28) | Frequency setting input | Connect resistor to AGND to set switching frequency from 280–700 kHz; open for internal 350/550 kHz modes. |
| SS/ENA (Pin 26) | Slow-start/enable control | Logic-enable input (threshold 0.82–1.40 V); also accepts external capacitor to extend soft-start time beyond 3.3 ms. |
| VBIAS (Pin 25) | Bias regulator output | 2.7–2.9 V internal LDO output; bypass with 0.1–1 µF ceramic capacitor to AGND for noise immunity. |
| VIN (Pins 20–24) | Main input supply | Accepts 3–6 V; multiple pins reduce IR drop and improve high-current routing to internal MOSFETs. |
| PGND (Pins 15–19) | Power ground return | High-current return path for low-side MOSFET and output capacitor; requires large copper pour to PGND PowerPAD. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30-mΩ MOSFETs | Enables 6-A continuous output without external switches; reduces BOM count and layout area vs discrete solutions. |
| Internally compensated control loop | Eliminates need for external compensation components; supports standard 4.7–10 µH inductors and ceramic output caps. |
| Fast transient response | 10–20 µs recovery time under step load; enabled by wide-bandwidth error amplifier and adaptive dead-time logic. |
| Programmable switching frequency | 280–700 kHz range via RT resistor allows EMI compliance tuning and optimization of efficiency vs size trade-offs. |
| Robust protection suite | Includes cycle-by-cycle current limit, thermal shutdown (150°C), UVLO (2.95 V start), and powergood monitoring. |
Applications
| Point-of-Load Regulation for FPGAs | Low-Voltage DSP Power Supply |
|---|---|
|
Use Scenario: Powers Xilinx or Intel FPGA core voltage (1.2 V) on dense PCBs with strict thermal and space constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 1.2 V at up to 6 A with fast transient response to logic switching currents. Use Value: Maintains <±2% output accuracy across –40°C to 125°C while supporting dynamic current steps typical of FPGA configuration and computation bursts. |
Use Scenario: Supplies 1.2-V I/O or core rail for TI C6000 or Analog Devices SHARC DSPs in broadband infrastructure equipment. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter with powergood signaling for safe DSP boot and reset coordination. Use Value: Delivers >90% efficiency at 3.3-V input and 4-A load, reducing thermal load in fanless 1RU chassis designs. |
| Industrial PLC CPU Module | Optical Line Card Power |
|
Use Scenario: Provides isolated 1.2-V supply for ARM Cortex-A series CPUs in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Robust buck controller with thermal shutdown and UVLO ensuring reliable startup and operation under brownout conditions. Use Value: Sustains 6-A output with RθJA = 18.2°C/W (with solder), enabling convection-cooled designs without heatsinks. |
Use Scenario: Generates 1.2-V bias for laser diode drivers and transimpedance amplifiers in 10G/25G optical modules. IC Role / Device Role / Timing Role: Low-noise, high-PG accuracy regulator supporting tight analog supply tolerances required for signal integrity. Use Value: 3% Vref hysteresis and 35-µs deglitch on PWRGD ensure clean reset signaling for SERDES initialization sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RHLR | Same 6-A rating, 1.2-V output, but uses 20-pin QFN (4×4 mm) with different pinout and no PowerPAD thermal pad. | Lacks integrated PowerPAD; requires more complex thermal vias and larger PCB area for equivalent thermal performance. | Choose when board space is constrained but thermal management can be handled via QFN layout; not pin-compatible. |
| MP2315GJ-Z | Monolithic 6-A buck with 1.2-V fixed output, but only 2.5–5.5 V input range and no RT-based frequency adjustability. | Missing PWRGD, SS/ENA flexibility, and thermal shutdown hysteresis; limited to simpler, cost-sensitive applications. | Consider for basic 1.2-V supplies where TI's robustness features (powergood, adaptive dead-time, wide temp range) are not required. |
Compared with TPS54612PWPRG4, TPS54620RHLR offers smaller footprint but inferior thermal performance without PowerPAD, while MP2315GJ-Z sacrifices critical reliability features (PWRGD, thermal hysteresis, frequency tuning) for lower cost and simplified design.
Availability
TPS54612PWPRG4 is available at Aetrix Electronics and suitable for industrial PLCs, optical line cards, FPGA power delivery, and DSP supply systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54612PWPRG4 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 ICs for industrial, automotive, and communications markets.
The TPS5461x family was designed specifically for high-density, low-voltage point-of-load applications demanding integrated MOSFETs, fast transient response, and robust protection-targeting FPGA, ASIC, and microprocessor core supplies.
FAQ
What is the maximum continuous output current of the TPS54612PWPRG4?
The TPS54612PWPRG4 delivers 6 A continuously under recommended operating conditions (TJ ≤ 125°C, VIN = 3–6 V). Its 30-mΩ integrated MOSFETs and PowerPAD™ HTSSOP package enable this rating with proper PCB thermal design-specifically, using soldered thermal vias to AGND and ≥1.5 oz copper planes. Derating applies above 70°C ambient per the dissipation ratings table.
Does the TPS54612PWPRG4 support adjustable output voltage?
No, the TPS54612PWPRG4 has a factory-trimmed fixed 1.2-V output with ±2% tolerance over temperature and load. It does not support external feedback resistors or VREF adjustment. For adjustable-output alternatives in the same family, consider the TPS54616 (3.3 V fixed) or non-SWIFT™ TI regulators like the TPS54620, which require external resistor dividers.
How does the TPS54612PWPRG4 handle thermal overload?
The TPS54612PWPRG4 activates thermal shutdown at 135–165°C junction temperature, disabling both MOSFETs and entering hiccup mode until TJ drops by ~10°C. This protects against sustained overloads or inadequate PCB cooling. Recovery is automatic and controlled by the internal slow-start circuit, preventing repeated hard-switching during fault conditions.
Can the switching frequency of the TPS54612PWPRG4 be changed externally?
Yes-the TPS54612PWPRG4 supports external frequency adjustment from 280 kHz to 700 kHz by connecting a resistor between the RT pin and AGND while leaving FSEL floating. Common values include 180 kΩ (280 kHz), 100 kΩ (500 kHz), and 68 kΩ (700 kHz). Internally, it defaults to 350 kHz (FSEL ≤0.8 V) or 550 kHz (FSEL ≥2.5 V).
What is the role of the BOOT pin on the TPS54612PWPRG4?
The BOOT pin on the TPS54612PWPRG4 supplies the floating gate drive voltage for the high-side N-channel MOSFET. It requires a 0.022–0.1 µF low-ESR ceramic capacitor connected between BOOT and PH. During low-side conduction, this capacitor charges from VIN through an internal 2.5-Ω switch; during high-side conduction, it provides the boosted voltage needed to fully enhance the high-side FET.
TPS54612PWPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 6A
- Frequency - Switching:
- 350kHz, 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TPS54612PWPRG4 FAQ
1.How can I place an order for TPS54612PWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54612PWPRG4 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 TPS54612PWPRG4 reliable?
The price and inventory of TPS54612PWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54612PWPRG4 is usually 5 days.
3.What payment methods are accepted for TPS54612PWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54612PWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54612PWPRG4?
TPS54612PWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54612PWPRG4 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 TPS54612PWPRG4?
For technical support, including TPS54612PWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54612PWPRG4 requirements.
6.How does Aetrix verify that TPS54612PWPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS54612PWPRG4 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 TPS54612PWPRG4 meets industry standards.
7.What is the process for return or replacement of TPS54612PWPRG4?
All TPS54612PWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54612PWPRG4, 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 TPS54612PWPRG4 part is unused and in its original packaging.
Return procedure for TPS54612PWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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