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Texas Instruments TPS54428DRCR
- Part No.:
- TPS54428DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54428DRCR.pdf
- Description:
- IC REG BUCK ADJ 4A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,103
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Product details
Overview
TPS54428DRCR from Texas Instruments is a 4.5-V to 18-V input, 4-A synchronous step-down DC/DC converter with D-CAP2™ adaptive on-time control, 650-kHz switching frequency, and Eco-mode™ for light-load efficiency. It integrates 74-mΩ high-side and 53-mΩ low-side N-channel MOSFETs, supports 0.76-V to 7.0-V adjustable output, and operates across –40°C to 85°C ambient for digital TV power supplies and STB applications.
For engineers reviewing the TPS54428DRCR datasheet, TPS54428DRCR pinout, TPS54428DRCR application, or TPS54428DRCR equivalent, key selection considerations include its VSON-10 package thermal performance (RθJB = 18.2°C/W), cycle-by-cycle overcurrent protection (4.6–6.8 A), pre-biased soft-start capability, and compatibility with ultra-low-ESR ceramic output capacitors.
Technical Context
The TPS54428DRCR implements D-CAP2™ mode control-combining adaptive on-time PWM with internal ripple-simulation circuitry-to achieve fast transient response without external compensation. Its one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, enabling pseudo-fixed 650-kHz operation across input and load variations.
It transitions seamlessly between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) via Auto-Skip Eco-mode™, reducing switching losses at light loads. Protection includes non-latching thermal shutdown (170°C), UVLO on VREG5 (3.45–4.05 V), and valley-current-based cycle-by-cycle overcurrent detection referenced to PGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer input rails including 5 V, 12 V, and 15 V systems. |
| Output Current | 4 A continuous - sufficient for powering SoCs, FPGAs, and DDR memory in embedded video systems. |
| Switching Frequency | 650 kHz - enables compact magnetics and balances EMI vs. efficiency trade-offs in space-constrained designs. |
| High-Side RDS(on) | 74 mΩ - minimizes conduction loss at high duty cycles; optimized for lower-VOUT applications (e.g., 1.05 V). |
| Low-Side RDS(on) | 53 mΩ - reduces synchronous rectification loss during DCM and improves light-load efficiency. |
| VFB Reference Voltage | 765 mV ±12 mV - sets output accuracy; enables precise 1.05 V, 1.2 V, or 1.8 V rails using standard 1% resistors. |
| Shutdown Current | <10 μA - ensures ultra-low system standby power in always-on consumer electronics. |
Pinout & Package
VSON-10 (3.0 mm × 3.0 mm) package with exposed thermal pad (PGND connection) for enhanced power dissipation. Pin count and layout optimized for high-density PCBs with minimal footprint and low-inductance SW/VIN routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Active-high logic interface; internal 225–900 kΩ pull-down enables default disable; compatible with 1.6 V logic high threshold. |
| 2 VFB | Feedback voltage sense | 0.765 V reference node; connects to resistor divider from output; ±0.1 μA input bias minimizes divider error. |
| 3 VREG5 | Internal 5.5 V LDO output | Supplies gate drive and internal circuitry; requires 1 μF ceramic capacitor to GND; inactive when EN = low. |
| 4 SS | Soft-start timing control | 6 μA constant current charges external capacitor; determines monotonic output ramp time and prevents inrush. |
| 5, 6 GND | Signal and power ground | Dual GND pins isolate sensitive analog returns (VFB, SS) from high di/dt PGND paths; must tie to thermal pad. |
| 7, 8 SW | Switch node | Connection point between integrated high- and low-side FETs; requires tight layout to minimize ringing and EMI. |
| 9 VBST | Bootstrap supply | Charged via internal diode from VREG5; 0.1 μF ceramic cap to SW provides gate drive voltage for high-side FET. |
| 10 VIN | Main input supply | 4.5–18 V input rail; requires local 10 μF ceramic + optional 0.1 μF HF decoupling; shares thermal pad with PGND. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates need for external compensation network while maintaining stability with ceramic output capacitors down to 22 μF. |
| Eco-mode™ auto-skip operation | Reduces light-load switching frequency dynamically to maintain >85% efficiency at 10 mA output current. |
| Pre-biased soft start | Prevents reverse current flow into pre-charged outputs by ramping low-side FET on-time gradually during startup. |
| Cycle-by-cycle overcurrent protection | Detects valley current on low-side FET during DCM; triggers non-latching shutdown after 7 consecutive fault cycles. |
| Integrated VREG5 LDO | Delivers regulated 5.5 V ±0.3 V at up to 60 mA to power external circuitry or bootstrap capacitor without extra regulator. |
Applications
| Digital TV Power Supply | High Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers main SoC core voltage (1.05 V/4 A) and DDR3 memory (1.5 V) from 12-V board rail. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated, low-noise DC output with fast transient response to dynamic video processing loads. Use Value: D-CAP2™ control maintains <±15 mV output deviation during 2-A load steps, eliminating need for large bulk capacitance. |
Use Scenario: Supplies HDMI PHY, video decoder, and audio DSP subsystems requiring stable 1.2 V, 1.8 V, and 3.3 V rails. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping 12 V down to 1.2 V for low-power logic domains. Use Value: Eco-mode™ extends battery-backed standby time by reducing quiescent current to <10 μA during idle states. |
| Digital Set Top Box (STB) | Networking Home Terminal |
Use Scenario: Generates 1.05 V core voltage for ARM-based media processor under bursty streaming workloads. IC Role / Device Role / Timing Role: Main processor power delivery IC with pre-biased soft start to avoid disrupting existing 1.05 V rail during hot-plug firmware updates. Use Value: Pre-biased startup prevents output sinking, ensuring uninterrupted operation when secondary power sources remain active. |
Use Scenario: Provides 1.8 V I/O supply for Ethernet PHY and Wi-Fi SoC in compact residential gateway hardware. IC Role / Device Role / Timing Role: Compact, thermally efficient point-of-load regulator operating from shared 12-V backplane. Use Value: VSON-10 package with 18.2°C/W RθJB enables full 4-A output in 300 mm² PCB area without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54328DRCR | 3-A output rating; identical D-CAP2™ control, package, and pinout; lower RDS(on) (65 mΩ HS / 45 mΩ LS). | Suitable where peak load ≤3 A and higher efficiency at mid-load is prioritized over 4-A headroom. | Select TPS54328DRCR when system peak current is confirmed ≤3 A and BOM cost reduction is critical. |
| MP2342DL-LF-Z | Monolithic 4-A buck with 500-kHz fixed frequency; no Eco-mode™; requires external compensation; 20-V max VIN. | Better suited for noise-sensitive analog subsystems where deterministic switching frequency simplifies EMI filtering. | Choose MP2342DL-LF-Z only if fixed-frequency operation and absence of adaptive control are design requirements. |
Compared with TPS54428DRCR, TPS54328DRCR offers lower conduction loss at 3-A loads but lacks 4-A margin, while MP2342DL-LF-Z trades D-CAP2™ simplicity and Eco-mode™ efficiency for predictable EMI behavior and wider VIN range.
Availability
TPS54428DRCR is available at Aetrix Electronics and suitable for digital TV power supplies, HD Blu-ray players, digital set-top boxes, and networking home terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54428DRCR 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 solutions.
The TPS544xx family was designed specifically for cost-sensitive, high-efficiency point-of-load applications in consumer video and broadband equipment, emphasizing integration, thermal robustness, and ease of use without external compensation.
FAQ
What is the maximum recommended output current for TPS54428DRCR under continuous operation?
The TPS54428DRCR is rated for 4-A continuous output current across –40°C to 85°C ambient temperature when used with proper PCB copper area and thermal vias under the exposed thermal pad. Derating is required above 85°C ambient or with insufficient heatsinking; full 4-A operation assumes RθJB ≤18.2°C/W and VIN ≤15 V.
Does TPS54428DRCR support pre-biased output startup?
Yes, the TPS54428DRCR includes proprietary pre-biased soft-start circuitry that prevents reverse current flow during startup. When the output voltage exceeds the soft-start command level, the controller incrementally increases low-side FET on-time cycle-by-cycle, ensuring smooth regulation without discharging the pre-biased rail.
What is the purpose of the VREG5 pin on TPS54428DRCR?
The VREG5 pin on TPS54428DRCR delivers a regulated 5.5 V output (±0.3 V) capable of sourcing up to 60 mA. It powers the internal gate drivers and control circuitry, and can also supply external components like bootstrap capacitors or level-shifters-eliminating the need for a separate LDO in many designs.
Can TPS54428DRCR operate with ceramic output capacitors only?
Yes, the TPS54428DRCR's D-CAP2™ control architecture and internal ripple-simulation circuitry enable stable operation with ultra-low-ESR ceramic capacitors (e.g., 22–68 μF X5R/X7R). No additional ESR or tantalum/polymer capacitors are required for loop stability or transient performance.
What protection features are integrated into TPS54428DRCR?
The TPS54428DRCR integrates cycle-by-cycle overcurrent protection (OCP), non-latching thermal shutdown (170°C), undervoltage lockout (UVLO) on VREG5 (3.45–4.05 V), and input overvoltage tolerance (20 V absolute max). All protections are fully internal-no external components needed for basic fault coverage.
TPS54428DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 4A
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54428DRCR FAQ
1.How can I place an order for TPS54428DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54428DRCR 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 TPS54428DRCR reliable?
The price and inventory of TPS54428DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54428DRCR is usually 5 days.
3.What payment methods are accepted for TPS54428DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54428DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54428DRCR?
TPS54428DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54428DRCR 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 TPS54428DRCR?
For technical support, including TPS54428DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54428DRCR requirements.
6.How does Aetrix verify that TPS54428DRCR is sourced from the original manufacturer or authorized distributors?
All TPS54428DRCR 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 TPS54428DRCR meets industry standards.
7.What is the process for return or replacement of TPS54428DRCR?
All TPS54428DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54428DRCR, 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 TPS54428DRCR part is unused and in its original packaging.
Return procedure for TPS54428DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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