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Texas Instruments TPS56920PWP
- Part No.:
- TPS56920PWP
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS56920PWP.pdf
- Description:
- IC REG BUCK ADJ 9A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:219
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Product details
Overview
TPS56920 from Texas Instruments is a 9A synchronous step-down DC-DC converter with D-CAP2™ control, 4.5V–17V input range, 0.6V–1.87V programmable output voltage via I²C or resistor divider, and 500kHz switching frequency. It powers SoC core rails in media processors and high-density power distribution systems.
For engineers reviewing the TPS56920 datasheet, TPS56920 pinout, TPS56920 application, or TPS56920 equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal performance (θJA = 36.8°C/W), real-world I²C voltage scaling capability, and two rigorously cross-checked alternative parts for design-in decisions.
Technical Context
The TPS56920 implements adaptive on-time D-CAP2™ control with integrated high-side (26mΩ) and low-side (19mΩ) NFETs, enabling fast transient response without external compensation. Its dual regulation modes-external VFB feedback and internal VID-based I²C programming-support flexible system-level voltage sequencing.
It features monotonic pre-biased soft-start, hiccup-mode overcurrent protection, thermal shutdown at 160°C, and undervoltage lockout with 3.9V nominal threshold. The device integrates a 5.5V linear regulator (VREG5) and supports Eco-mode™ for light-load efficiency optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 17V - Supports wide-input industrial and consumer power rails including 12V bus and 5V auxiliary supplies. |
| Output Current Rating | 9A continuous - Sustains full load under 125°C junction temperature with proper PCB thermal design. |
| Output Voltage Range | 0.6V to 1.87V - Covers modern SoC core voltages with ±1% accuracy across line/load/temperature. |
| Switching Frequency | 500kHz - Enables compact 1.0µH–2.2µH inductor selection and predictable EMI profile. |
| High/Low-Side RDS(on) | 26mΩ / 19mΩ - Minimizes conduction loss at 9A, supporting >90% typical efficiency at mid-load. |
| Thermal Resistance θJA | 36.8°C/W - Achievable with 4-layer board, 2-in² exposed PowerPAD™ copper, and standard reflow profile. |
| I²C Interface | 400kHz standard mode - Enables dynamic voltage scaling during processor DVFS transitions without firmware overhead. |
Pinout & Package
TPS56920 uses the HTSSOP-20 (PWP) package with PowerPAD™ thermal pad (6.50 mm × 4.40 mm body size). The exposed pad must be soldered to a dedicated GND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (1) | Enable input | Active-high logic control; 1.85V threshold ensures robust noise immunity in noisy digital environments. |
| SDA (2), SCL (3) | I²C data/clock | Support bidirectional VID programming and status readback; require pull-up resistors to VREG5 or external 3.3V rail. |
| A0, A1 (4,5) | I²C address bits | Set slave address (0x65–0x68); floating or tied to GND/VREG5 for multi-device bus configuration. |
| VIN (6) | 5.5V LDO input | Powers internal circuitry; bypassed by ≥2.0µF ceramic capacitor to GND for stable bias supply. |
| PVIN (7,8) | Main power input | Connects directly to high-side MOSFET drains; requires local 10µF+ low-ESR ceramic decoupling. |
| PGND (9,10) | Power ground return | Low-impedance path for low-side FET current; must be routed separately from signal GND to avoid noise coupling. |
| SW (11–13) | Switch node | Three parallel pins reduce trace inductance and thermal stress; connect directly to inductor and bootstrap capacitor. |
| VBST (14) | Bootstrap supply | Drives high-side gate; requires 0.1µF ceramic cap between VBST and SW for reliable gate drive voltage generation. |
| PGOOD (15) | Open-drain status | Asserts low when VOUT deviates >±15% from target; used for system power sequencing and fault monitoring. |
| VREG5 (16) | 5.5V LDO output | Provides regulated supply for external components; must not be loaded beyond 5mA and bypassed with ≥2.0µF ceramic. |
| GND (17) | Signal ground | Reference for sensitive analog inputs (VFB, SS); tie to PGND at single point near IC for clean feedback path. |
| SS (18) | Soft-start timing | Capacitor-to-GND sets ramp time; 1nF yields ~1ms start-up, preventing inrush current into large output capacitors. |
| VOUT (19) | Output voltage sense | Direct connection to output rail; used only in internal VID mode; must be shorted to VFB in external regulation mode. |
| VFB (20) | Feedback input | Resistor-divider input for external regulation; 0.6V reference enables precise output setting independent of VID interface. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Adaptive On-Time Control | Eliminates external compensation network while maintaining stability with ceramic or POSCAP output capacitors. |
| I²C Programmable Output Voltage | 7-bit VID resolution (10mV steps) enables dynamic core voltage scaling for SoC DVFS without hardware changes. |
| Monotonic Pre-Biased Soft-Start | Prevents reverse current flow during startup into pre-charged outputs, critical for multi-rail systems with hold-up capacitors. |
| Integrated 5.5V Linear Regulator (VREG5) | Reduces BOM count by powering internal logic and external level-shifters or I²C pull-ups without secondary supply. |
| Hiccup-Mode Overcurrent Protection | Limits fault energy during short-circuit events by cycling on/off instead of latching, preserving downstream components. |
| Eco-mode™ Light-Load Optimization | Automatically enters pulse-skipping mode below ~1A, sustaining >85% efficiency at 100mA output current. |
Applications
| Media Processor Core Supply | SoC Power Delivery |
|---|---|
Use Scenario: Powers VCORE rail of digital TV SoCs requiring dynamic voltage scaling during video decode and UI rendering. IC Role / Device Role / Timing Role: Primary buck regulator delivering 0.85V–1.2V at up to 9A with I²C-controlled VID transitions synchronized to processor P-states. Use Value: Enables 15% reduction in active power consumption via real-time voltage/frequency coordination without external DAC or sequencer. |
Use Scenario: Supplies core voltage to ARM-based application processors in set-top boxes with tight thermal constraints. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with monotonic startup and PGOOD signaling for safe system boot sequence. Use Value: Guarantees glitch-free power-on reset by holding processors in reset until VOUT stabilizes within ±1% and PGOOD asserts. |
| High-Density Server PMIC Sub-Block | Industrial FPGA Core Rail |
Use Scenario: Delivers 1.0V/9A to ASIC clusters in compact networking equipment where board space limits inductor size. IC Role / Device Role / Timing Role: Compact 20-pin HTSSOP buck stage optimized for 1.5µH inductors, reducing solution footprint by 30% vs. discrete controllers. Use Value: Achieves 92% peak efficiency at 5A with minimal thermal rise, eliminating need for forced air cooling in sealed enclosures. |
Use Scenario: Generates configurable 0.9V–1.1V core voltage for Xilinx Artix-7 FPGAs in factory automation controllers. IC Role / Device Role / Timing Role: I²C-programmable regulator supporting multiple FPGA configuration profiles stored in host microcontroller memory. Use Value: Allows field-upgradable voltage settings via firmware update, avoiding hardware revision for different FPGA speed grades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS56720 | 7A rated output, identical 20-pin PWP package, same D-CAP2™ architecture and I²C interface. | Lower current capability suits cost-sensitive designs where 7A headroom suffices; shares layout compatibility. | Select when full 9A margin is unnecessary and BOM cost reduction is prioritized without changing PCB footprint. |
| TPS56520 | 5A rated output, same package and feature set but reduced MOSFET RDS(on) (44mΩ/32mΩ) and lower current limit. | Targeted at entry-level media processors or auxiliary rails; lower thermal dissipation simplifies heatsinking. | Choose for space-constrained auxiliary supplies or dual-rail designs where one channel handles baseband and another handles core. |
Compared with TPS56720 and TPS56520, the TPS56920 provides 28% higher output current than the 7A variant and 80% more than the 5A variant within the identical HTSSOP-20 footprint-enabling single-chip scalability across product tiers without layout redesign.
Availability
TPS56920 is available at Aetrix Electronics and suitable for media processors, SoC power delivery, and high-density server PMIC subsystems requiring stable component supply, long-term lifecycle support, and TI-authorized traceability.
Supply support for TPS56920 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.
The TPS56920 belongs to TI's TPS56x20 family of voltage-scaling buck regulators, engineered specifically for dynamic core voltage delivery in media processors and SoCs demanding precision, speed, and integration.
FAQ
What is the maximum output current supported by the TPS56920?
The TPS56920 is rated for 9A continuous output current under recommended operating conditions (TJ ≤ 125°C). Its current limit is programmable from 40% to 160% of nominal rating, with typical overcurrent trip at 10A–15A depending on inductor value and thermal design. Derating applies above 85°C ambient.
Does the TPS56920 require external compensation components?
No, the TPS56920 uses D-CAP2™ adaptive on-time control and requires no external compensation network. It remains stable with low-ESR ceramic, POSCAP, or SP-CAP output capacitors, significantly simplifying layout and reducing bill-of-materials count compared to traditional voltage-mode controllers.
How does the I²C interface on the TPS56920 enable voltage scaling?
The TPS56920 supports 7-bit VID codes over standard-mode I²C (400kHz), allowing dynamic adjustment of output voltage from 0.6V to 1.87V in 10mV steps. This enables real-time core voltage scaling during processor DVFS transitions without interrupting operation or requiring external DACs.
What is the purpose of the VREG5 pin on the TPS56920?
VREG5 is an integrated 5.5V linear regulator output that powers internal circuitry and can supply external components such as I²C pull-up resistors or level shifters. It delivers up to 5mA and must be bypassed with ≥2.0µF ceramic capacitance to GND; no other loads should be connected to this pin.
Can the TPS56920 operate without using the I²C interface?
Yes, the TPS56920 supports standalone operation using external resistor divider feedback on the VFB pin. In this mode, SDA/SCL/A0/A1 pins are grounded or left floating, and output voltage is fixed at power-up. The I²C interface is optional and disabled by default unless enabled via configuration register.
TPS56920PWP 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:
- 9A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS56920PWP FAQ
1.How can I place an order for TPS56920PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS56920PWP 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 TPS56920PWP reliable?
The price and inventory of TPS56920PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS56920PWP is usually 5 days.
3.What payment methods are accepted for TPS56920PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS56920PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS56920PWP?
TPS56920PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS56920PWP 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 TPS56920PWP?
For technical support, including TPS56920PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS56920PWP requirements.
6.How does Aetrix verify that TPS56920PWP is sourced from the original manufacturer or authorized distributors?
All TPS56920PWP 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 TPS56920PWP meets industry standards.
7.What is the process for return or replacement of TPS56920PWP?
All TPS56920PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS56920PWP, 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 TPS56920PWP part is unused and in its original packaging.
Return procedure for TPS56920PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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