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Texas Instruments TPS54612PWP
- Part No.:
- TPS54612PWP
- Manufacturer:
- Texas Instruments
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54612PWP.pdf
- Description:
- IC REG BUCK 1.2V 6A 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,911
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Product details
Overview
TPS54612PWP from Texas Instruments is a 3-V to 6-V input, 6-A synchronous buck PWM converter with integrated 30-mΩ high-side and low-side MOSFETs, fixed 1.2-V output (±2% over temperature/load), and internal compensation. It delivers high efficiency in point-of-load regulation for FPGAs and microprocessors, operating at 350 kHz or 550 kHz with adjustable frequency up to 700 kHz.
For engineers reviewing the TPS54612PWP datasheet, TPS54612PWP pinout, TPS54612PWP application, or TPS54612PWP equivalent, key selection considerations include its thermally enhanced HTSSOP-28 PowerPAD™ package, powergood (PWRGD) monitoring, UVLO with 2.95-V start threshold, and integrated slow-start with 4.5-ms internal ramp time for 1.2-V output.
Technical Context
The TPS54612PWP implements a voltage-mode synchronous buck topology with an internally compensated error amplifier (26 dB gain, 3–5 MHz unity-gain bandwidth), adaptive dead-time control, and cycle-by-cycle peak current limiting (7.2–12 A depending on VIN). Its PWM comparator features 70–85 ns propagation delay and 100 ns leading-edge blanking to suppress false triggering.
It integrates a 2.8-V internal bias regulator (VBIAS) capable of sourcing 100 µA, a precision 0.891-V reference (±0.5% over –40°C to 125°C), and dual-frequency selection via FSEL pin (350/550 kHz) or RT resistor (280–700 kHz). Thermal shutdown activates at 150°C with 10°C hysteresis.
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% - factory-trimmed fixed output with 1.0% initial accuracy at 25°C; stable across –40°C to 125°C junction range. |
| Continuous Output Current | 6 A - sustained load capability enabled by dual 30-mΩ MOSFETs and thermal design optimized for 18.2°C/W RθJA with soldered PowerPAD™. |
| Switching Frequency | 350 kHz (default) or 550 kHz (FSEL ≥2.5 V); externally adjustable 280–700 kHz via RT resistor - enables EMI optimization and inductor size trade-offs. |
| Powergood Threshold | 90% of VREF (≈0.802 V) - open-drain PWRGD asserts low when output drops below regulation, supporting processor reset sequencing. |
| UVLO Start/Stop | 2.95 V / 2.80 V - ensures reliable startup only after input stabilizes above 3 V; 0.15-V hysteresis prevents chatter near threshold. |
| Internal Slow-Start Time | 4.5 ms - linear ramp of internal reference from 0 V to 0.891 V, limiting inrush current during power-up for 1.2-V output. |
Pinout & Package
TPS54612PWP uses a 28-pin HTSSOP (PWP) package with exposed thermal PowerPAD™ on underside, requiring solder connection to AGND plane for thermal performance (RθJA = 18.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pin 1) | Analog ground reference | Return for SS/ENA capacitor, VBIAS bypass, RT/FSEL resistors; must connect to PowerPAD™ for stable bias and compensation. |
| VSENSE (Pin 2) | Error amplifier inverting input | Direct connection to output voltage feedback node; determines regulation accuracy and transient response loop stability. |
| PWRGD (Pin 4) | Open-drain power-good indicator | Signals valid output (high-Z) when VSENSE ≥90% VREF; pulled low during UVLO, shutdown, or thermal fault - used for system sequencing. |
| BOOT (Pin 5) | Bootstrap supply for high-side driver | Connects via 0.022–0.1-µF ceramic capacitor to PH; enables floating gate drive for integrated high-side MOSFET. |
| PH (Pins 6–14) | Phase node | High-current switching node connecting internal MOSFETs to external inductor; requires low-inductance layout and Kelvin sensing for stability. |
| RT (Pin 28) | Frequency setting input | Resistor to AGND sets switching frequency from 280 kHz to 700 kHz; floating selects internal 350/550 kHz modes. |
| SS/ENA (Pin 26) | Slow-start/enable control | Logic-enable input (1.2 V threshold); capacitor to AGND extends soft-start time beyond internal 4.5 ms for 1.2-V output. |
| VBIAS (Pin 25) | Bias regulator output | 2.8-V internal LDO output; bypass with 0.1–1-µF X7R/X5R ceramic to AGND for noise immunity and analog circuit stability. |
| VIN (Pins 20–24) | Main input supply | 3–6 V input for power switches and bias regulator; each pin must be individually bypassed to PGND with 1–10-µF ceramic capacitors. |
| PGND (Pins 15–19) | Power ground return | High-current return path for low-side MOSFET and output inductor; requires wide copper pour connected to PowerPAD™ and input/output caps. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30-mΩ MOSFETs | Enables 6-A continuous output without external power devices; reduces board area and eliminates gate-drive complexity. |
| Internally compensated control loop | Eliminates need for external compensation components; supports standard 4.7–10-µH inductors and common output capacitor types. |
| Fast transient response | 10–20 µs recovery time under load steps; achieved via high-bandwidth error amplifier and adaptive dead-time control. |
| Programmable switching frequency | 280–700 kHz range via RT resistor - allows optimization for efficiency (lower fSW) or size/EMI (higher fSW) per application. |
| Comprehensive protection suite | Includes cycle-by-cycle current limit (7.2–12 A), thermal shutdown (150°C trip), UVLO, and powergood monitoring. |
Applications
| Point-of-Load Regulation for FPGAs | Low-Voltage DSP Core Supply |
|---|---|
|
Use Scenario: Powers 1.2-V core rail of Xilinx Artix-7 or Intel Cyclone V FPGA during configuration and active operation. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 6 A with tight voltage tolerance and fast load-step response. Use Value: Maintains 1.2 V ±2% under 0–6 A dynamic load while meeting FPGA core voltage ripple requirements (<20 mVpp) and sequencing timing. |
Use Scenario: Supplies 1.2-V core voltage to TI C6000 DSPs in broadband baseband processing units. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter with PWRGD signaling for safe DSP boot and reset coordination. Use Value: Delivers >92% efficiency at 4 A/1.2 V from 5-V input, reducing thermal load in dense signal-processing modules. |
| Industrial PLC I/O Module Supply | Network Processor Memory Interface |
|
Use Scenario: Generates isolated 1.2-V supply for ARM Cortex-M7-based I/O controller in programmable logic controllers. IC Role / Device Role / Timing Role: Robust, thermally managed buck converter operating continuously at 85°C ambient with derated output. Use Value: Sustains 6-A output with RθJA = 18.2°C/W and thermal shutdown at 150°C, ensuring reliability in unventilated enclosures. |
Use Scenario: Powers DDR3L memory termination and interface logic in 10G Ethernet line cards. IC Role / Device Role / Timing Role: Low-noise, fast-transient regulator synchronized to system clock via adjustable fSW to avoid beat frequencies. Use Value: Achieves <15 µs transient recovery with <15 mV undershoot during 4-A step loads, preserving memory data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYR | Same 1.2-V fixed output, but 6-A rating with improved 12-A peak current limit and lower RDS(on) (18 mΩ/12 mΩ); QFN-14 package with no PowerPAD™ thermal pad. | Lacks PowerPAD™ thermal enhancement; requires more careful PCB thermal design; higher peak current supports heavier transient loads. | Choose TPS54620RGYR if higher peak current headroom and smaller footprint are prioritized over thermal robustness in high-ambient environments. |
| MP2315DJ-LF-P | 1.2-V fixed output, 6-A rating, 2.5–6-V input, but uses external compensation and lacks PWRGD; 12-pin QFN with 1.5-W dissipation limit at 85°C. | No powergood signaling or integrated slow-start; requires external RC network for soft-start and full loop compensation. | Choose MP2315DJ-LF-P only if cost sensitivity outweighs need for integrated protection, sequencing, and ease of design. |
Compared with TPS54612PWP, TPS54620RGYR offers superior peak current capability and compact packaging but reduced thermal margin, while MP2315DJ-LF-P sacrifices integration and protection for lower BOM cost and flexibility in loop tuning.
Availability
TPS54612PWP is available at Aetrix Electronics and suitable for FPGA power delivery, industrial PLC subsystems, and networking equipment requiring stable component supply with long-term manufacturability and consistent electrical performance.
Supply support for TPS54612PWP 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 IC design and manufacturing.
The TPS5461x family was engineered for high-density, low-voltage point-of-load applications in computing, communications, and industrial systems-delivering integrated, thermally robust, and easy-to-design synchronous buck solutions.
FAQ
What is the maximum continuous output current of the TPS54612PWP?
The TPS54612PWP delivers 6 A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design with soldered PowerPAD™). Its dual 30-mΩ MOSFETs and 18.2°C/W junction-to-ambient thermal resistance enable this rating at ambient temperatures up to 85°C with adequate copper area.
Does the TPS54612PWP require external compensation components?
No, the TPS54612PWP features internal compensation optimized for standard 4.7–10-µH inductors and common output capacitor configurations. This eliminates external compensation networks, simplifying design and reducing BOM count while maintaining stability across load and temperature ranges.
How does the TPS54612PWP handle overcurrent conditions?
The TPS54612PWP employs cycle-by-cycle peak current limiting with 100 ns leading-edge blanking. When sensed high-side current exceeds 7.2–12 A (depending on VIN), the high-side FET turns off within 200 ns. Thermal shutdown (150°C trip) provides secondary protection during sustained overload.
Can the switching frequency of the TPS54612PWP be adjusted, and how?
Yes - the TPS54612PWP supports three frequency modes: 350 kHz (FSEL ≤0.8 V, RT floating), 550 kHz (FSEL ≥2.5 V, RT floating), or externally adjustable 280–700 kHz via resistor from RT to AGND (e.g., 100 kΩ yields ~500 kHz). No external clock sync is supported.
What is the purpose of the PowerPAD™ in the TPS54612PWP package?
The exposed thermal pad (PowerPAD™) on the underside of the TPS54612PWP's HTSSOP-28 package must be soldered to a large AGND copper plane to achieve the specified 18.2°C/W junction-to-ambient thermal resistance. Without this connection, RθJA degrades to 40.5°C/W, severely limiting power handling and reliability.
TPS54612PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
TPS54612PWP FAQ
1.How can I place an order for TPS54612PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54612PWP 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 TPS54612PWP reliable?
The price and inventory of TPS54612PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54612PWP is usually 5 days.
3.What payment methods are accepted for TPS54612PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54612PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54612PWP?
TPS54612PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54612PWP 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 TPS54612PWP?
For technical support, including TPS54612PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54612PWP requirements.
6.How does Aetrix verify that TPS54612PWP is sourced from the original manufacturer or authorized distributors?
All TPS54612PWP 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 TPS54612PWP meets industry standards.
7.What is the process for return or replacement of TPS54612PWP?
All TPS54612PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54612PWP, 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 TPS54612PWP part is unused and in its original packaging.
Return procedure for TPS54612PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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