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Texas Instruments TPS56720PWP
- Part No.:
- TPS56720PWP
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS56720PWP.pdf
- Description:
- IC REG BUCK ADJ 7A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:386
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Product details
Overview
TPS56720 from Texas Instruments is a synchronous step-down DC-DC converter IC with D-CAP2™ control, delivering up to 7 A output current across 4.5 V–17 V input range, 0.6 V–1.87 V programmable output voltage (±1% accuracy), and fixed 500 kHz switching frequency. It powers SoC core rails in media processors and high-density power distribution systems.
For engineers reviewing the TPS56720 datasheet, TPS56720 pinout, TPS56720 application, or TPS56720 equivalent, this page provides verified technical context, validated I²C-programmable voltage scaling, confirmed thermal performance (θJA = 36.8°C/W), and real-world soft-start and Eco-mode™ behavior for embedded processor supply design.
Technical Context
The TPS56720 implements adaptive on-time D-CAP2™ control with integrated high-side (30 mΩ) and low-side (24 mΩ) NFETs, enabling fast transient response without external compensation. Its dual regulation modes-external resistor-divider feedback (VFB) and internal I²C VID programming-support both fixed and dynamic VCORE tuning.
It features monotonic pre-biased soft-start via SS pin, hiccup-mode overcurrent protection, thermal shutdown at 160°C, and UVLO with 3.9 V nominal enable threshold. The device uses a 20-pin HTSSOP (PWP) package with exposed PowerPAD™ for thermal management and supports 1.0 µH–2.2 µH inductors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 17 V - Supports wide-input industrial and consumer DC bus rails including 5 V, 12 V, and 15 V supplies. |
| Output Current | 7 A continuous - Sufficient for mid-tier SoC cores (e.g., ARM Cortex-A series) and media processors. |
| Output Voltage Range | 0.6 V to 1.87 V in 10 mV steps - Enables precise VCORE scaling via I²C or resistor divider for power/performance optimization. |
| Switching Frequency | 500 kHz - Fixed frequency enables predictable EMI filtering and simplifies inductor selection. |
| Voltage Accuracy | ±1% over temperature and line/load - Ensures stable operation of sensitive digital logic without margining overhead. |
| HS/LS RDS(on) | 30 mΩ / 24 mΩ - Low conduction loss improves full-load efficiency and reduces thermal stress in compact layouts. |
| Thermal Resistance θJA | 36.8°C/W - Validated for standard 2-layer PCB with PowerPAD™ soldered to thermal plane. |
Pinout & Package
TPS56720 is housed in a 20-pin HTSSOP (PWP) package with exposed thermal pad (PowerPAD™), measuring 6.50 mm × 4.40 mm. The pad must be soldered to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic control; 1.85 V threshold ensures robust noise immunity in noisy environments. |
| SDA / SCL | I²C data/clock interface | Supports bidirectional VID programming and status readback (e.g., PGOOD, current limit setting) at 400 kHz. |
| A0 / A1 | I²C address select | 2-bit hardware address configuration enables up to four TPS56720 devices on same I²C bus. |
| VIN | 5.5 V LDO input | Powers internal 5.5 V regulator (VREG5); bypassed with ≥2.0 µF ceramic capacitor for stability. |
| PVIN (7,8) | Main power input | Connects directly to high-side MOSFET drains; requires low-ESR bulk capacitance near pins. |
| PGND (9,10) | Power ground return | Low-impedance path for low-side FET current; must be separated from signal GND until single-point tie. |
| SW (11–13) | Switch node | Three parallel connections reduce trace inductance and improve current sharing across integrated FETs. |
| VBST | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1 µF ceramic capacitor to SW for high-side gate drive. |
| PGOOD | Open-drain power-good | Asserts after soft-start and voltage regulation; used for system sequencing and fault monitoring. |
| VREG5 | 5.5 V linear regulator output | Supplies internal circuitry and can power external bias rails; must not be loaded beyond 5 mA. |
| GND | Signal ground reference | Reference for VFB, SS, and analog blocks; routed separately from PGND and tied at single point. |
| SS | Soft-start timing | Capacitor-to-GND sets monotonic ramp time; prevents inrush current during pre-biased start-up. |
| VOUT | Output voltage sense | Direct connection to output rail for internal current sensing and overvoltage protection. |
| VFB | Feedback input | Accepts resistor divider for external regulation mode; internally connected to DAC in VID mode. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates external compensation components while maintaining stability with ceramic or POSCAP output capacitors. |
| I²C-compatible voltage scaling | Enables dynamic VCORE adjustment (0.6 V–1.87 V) during SoC runtime for DVFS without hardware changes. |
| Monotonic pre-biased soft-start | Prevents reverse current flow and output voltage undershoot when powering up into pre-charged loads. |
| Eco-mode™ light-load efficiency | Automatically transitions to pulse-skipping mode below ~10% load, sustaining >85% efficiency at 100 mA. |
| Valley-current overcurrent protection | Provides cycle-by-cycle limiting with adjustable target (40%–160%), supporting robust short-circuit recovery. |
| Integrated 5.5 V LDO (VREG5) | Reduces BOM count by eliminating external bias supply; powers internal logic and bootstrap circuitry. |
Applications
| Media Processor Core Supply | SoC Dynamic Voltage Scaling |
|---|---|
Use Scenario: Powers ARM-based media SoCs in digital TVs and set-top boxes requiring tight voltage tolerance and rapid load transients. IC Role / Device Role / Timing Role: Primary VCORE regulator with D-CAP2™ control ensuring sub-10 µs transient response to CPU burst activity. Use Value: ±1% output accuracy and monotonic start-up prevent logic errors during boot and video decode bursts. |
Use Scenario: Supplies configurable voltage to application processors that adjust operating frequency and voltage based on workload. IC Role / Device Role / Timing Role: I²C-programmable buck converter enabling real-time VID updates synchronized with CPU DVFS states. Use Value: 10 mV VID steps and 400 kHz I²C interface allow precise, low-latency voltage transitions without firmware delay. |
| High-Density Server PMIC Sub-Regulator | Industrial FPGA Core Rail |
Use Scenario: Delivers 7 A at 0.85 V to ASIC clusters in space-constrained telecom or storage modules. IC Role / Device Role / Timing Role: Compact, thermally optimized buck stage replacing discrete controller + MOSFET solutions. Use Value: 36.8°C/W θJA and PowerPAD™ enable 7 A operation on 2-layer boards without heatsinks. |
Use Scenario: Supplies Xilinx or Intel FPGA core voltage in industrial controllers where reliability and thermal margin are critical. IC Role / Device Role / Timing Role: Robust synchronous regulator with hiccup-mode OCP and 160°C thermal shutdown. Use Value: Cycle-by-cycle current limiting and 23°C thermal hysteresis prevent latch-up during FPGA configuration surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS56520 | 5 A output rating; higher HS/LS RDS(on) (44 mΩ/32 mΩ); same 20-pin PWP package. | Suitable for lower-power SoCs or auxiliary rails where 7 A headroom is unnecessary. | Select when thermal budget or cost sensitivity favors reduced current capability and simpler layout. |
| TPS56920 | 9 A output rating; lower RDS(on) (26 mΩ/19 mΩ); identical pinout and feature set. | Required for higher-core-count SoCs or future-proofing with >7 A peak demand. | Choose when sustained 8–9 A load or lower conduction loss is needed without changing PCB footprint. |
Compared with TPS56520, the TPS56720 delivers 40% higher current with 32% lower conduction loss, while matching TPS56920's pin compatibility but offering better cost-efficiency for 7 A use cases.
Availability
TPS56720 is available at Aetrix Electronics and suitable for media processors, SoC core supplies, and high-density power distribution systems requiring stable component supply, long-term lifecycle support, and TI-authorized traceability.
Supply support for TPS56720 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 DC-DC conversion.
The TPS56x20 family was designed specifically for VCORE regulation in consumer and industrial SoCs, emphasizing programmable voltage scaling, fast transient response, and integration to reduce board area and BOM count.
FAQ
What is the maximum output current supported by the TPS56720?
The TPS56720 supports up to 7 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, 4.5 V–17 V input). This rating is validated with proper PCB thermal design-including soldered PowerPAD™ and adequate copper area-and accounts for derating above 85°C ambient. Peak current capability reaches 12 A before valley-current limiting activates.
Does the TPS56720 require external compensation components?
No, the TPS56720 uses D-CAP2™ adaptive on-time control, which eliminates the need for external compensation networks. It remains stable with low-ESR ceramic, POSCAP, or SP-CAP output capacitors and is optimized for 1.0 µH–2.2 µH inductors-reducing design complexity and bill-of-materials count compared to traditional voltage-mode controllers.
How does the I²C interface on the TPS56720 function for voltage programming?
The TPS56720 supports I²C-based VID programming via SDA/SCL pins, allowing dynamic output voltage adjustment from 0.6 V to 1.87 V in 10 mV steps. Address bits A0/A1 configure one of four possible I²C addresses (0x6A–0x6D). The device also supports readback of PGOOD status and current limit settings, enabling closed-loop system monitoring.
What is the purpose of the SS (Soft-Start) pin on the TPS56720?
The SS pin on the TPS56720 controls soft-start timing via an external capacitor to GND. It provides monotonic, pre-biased start-up-critical for powering into already charged output rails without causing reverse current or overshoot. The internal SS charge current is –6 µA, enabling predictable ramp rates independent of input voltage or load.
Can the TPS56720 operate with only external resistor feedback, without using I²C?
Yes, the TPS56720 supports standalone external regulation mode: connect VFB to the output via a resistor divider, tie SDA/SCL to GND, and leave A0/A1 floating. In this mode, VOUT is connected directly to the output rail for sensing, and all I²C functionality is disabled-providing a simple, pin-compatible alternative to VID-based designs.
TPS56720PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™, Eco-Mode™
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.87V
- Current - Output:
- 7A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS56720PWP FAQ
1.How can I place an order for TPS56720PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS56720PWP 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 TPS56720PWP reliable?
The price and inventory of TPS56720PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS56720PWP is usually 5 days.
3.What payment methods are accepted for TPS56720PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS56720PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS56720PWP?
TPS56720PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS56720PWP 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 TPS56720PWP?
For technical support, including TPS56720PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS56720PWP requirements.
6.How does Aetrix verify that TPS56720PWP is sourced from the original manufacturer or authorized distributors?
All TPS56720PWP 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 TPS56720PWP meets industry standards.
7.What is the process for return or replacement of TPS56720PWP?
All TPS56720PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS56720PWP, 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 TPS56720PWP part is unused and in its original packaging.
Return procedure for TPS56720PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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