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Texas Instruments TPS54427DRCR
- Part No.:
- TPS54427DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54427DRCR.pdf
- Description:
- IC REG BUCK ADJ 4A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,557
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Product details
Overview
TPS54427DRCR from Texas Instruments is a 4-A synchronous step-down DC/DC converter with integrated high-side (74 mΩ) and low-side (53 mΩ) N-channel MOSFETs, operating from 4.5 V to 18 V input and delivering adjustable output voltage from 0.76 V to 7.0 V. It uses D-CAP2™ adaptive on-time control for fast transient response in digital TV power supplies, Blu-ray player core rails, and networking terminal point-of-load regulation.
For engineers reviewing the TPS54427DRCR datasheet, TPS54427DRCR pinout, TPS54427DRCR application, or TPS54427DRCR equivalent, key selection considerations include its 650-kHz pseudo-fixed switching frequency, pre-biased soft-start capability, cycle-by-cycle overcurrent protection, thermal shutdown at 170°C, and compatibility with ultra-low-ESR ceramic output capacitors without external compensation.
Technical Context
The TPS54427DRCR implements D-CAP2™ adaptive on-time control-combining constant on-time PWM with internal ripple simulation-to achieve stable operation with ceramic capacitors and eliminate need for external compensation. Its proprietary circuit adapts to both low-ESR polymer and ultra-low-ESR ceramic output capacitors.
It features a dedicated 5.5-V VREG5 LDO output (±0.3 V tolerance, 60-mA capability), adjustable soft-start via external capacitor (6-µA charge current), and non-latching protections including UVLO (3.75 V threshold), cycle-by-cycle valley-current OCP, and thermal shutdown (170°C, 35°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer DC bus inputs including 5 V, 12 V, and 15 V rails. |
| Output Current | 4 A continuous - delivers full rated load without derating at TA = 85°C with proper PCB thermal design. |
| Switching Frequency | 650 kHz - enables compact magnetics and EMI filtering while maintaining high light-load efficiency. |
| High-Side RDS(on) | 74 mΩ - optimized for lower duty-cycle applications (e.g., 1.05 V out from 12 V in), reducing conduction loss. |
| Feedback Reference | 0.765 V ±6 mV - precise bandgap reference enabling accurate output regulation across temperature. |
| Shutdown Current | <10 µA - minimizes system standby power in always-on consumer electronics. |
| Thermal Resistance | RθJB = 18.2 °C/W - low junction-to-board resistance enabled by exposed PGND thermal pad in VSON-10 package. |
Pinout & Package
TPS54427DRCR is housed in a 3.0 mm × 3.0 mm, 10-pin VSON package with exposed PGND thermal pad on underside for enhanced thermal dissipation. The package is RoHS-compliant and moisture-sensitive level 2a per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; internal 450-kΩ pull-down ensures default disable; requires ≥1.6 V to activate. |
| 2 - VFB | Feedback input | Connects to resistor divider; senses 0.765-V reference to regulate output; ±0.1-µA input bias minimizes divider error. |
| 3 - VREG5 | Internal LDO output | 5.5-V, 60-mA regulated supply for gate drive and internal circuitry; requires 1-µF ceramic bypass to GND. |
| 4 - SS | Soft-start control | 6-µA current source charges external capacitor; start time programmable per Tss = (C6 × 0.765 V)/6 µA. |
| 5 - GND | Analog ground | Reference return for VFB and SS; must be star-connected to PGND near device to avoid noise coupling. |
| 6–7 - SW | Power switch node | Connection between internal high- and low-side FETs; carries high di/dt; requires tight layout with minimal loop area. |
| 8 - VBST | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1-µF ceramic capacitor to SW for high-side gate drive. |
| 9–10 - VIN | Main input supply | 4.5–18 V input; dual pins reduce IR drop and improve thermal spreading; connect directly to bulk capacitor. |
| Exposed Pad | PGND | Power ground return for low-side FET; must be soldered to large PCB copper pour for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ control mode | Enables stable regulation with ceramic output capacitors and zero external compensation components. |
| Pre-biased soft start | Prevents reverse current flow during startup when output is pre-charged, avoiding output voltage collapse. |
| Cycle-by-cycle OCP | Valley-current sensing on low-side FET provides accurate, temperature-compensated overcurrent protection. |
| VIN UVLO with hysteresis | 3.75 V turn-on / 3.56 V turn-off (0.19 V hysteresis) referenced to VREG5, ensuring clean power sequencing. |
| Integrated 5.5-V VREG5 LDO | Supplies gate drive and internal logic; eliminates need for external bias rail in most applications. |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player Core Rail |
|---|---|
Use Scenario: Powers SoC core voltage (1.05 V @ 4 A) in flat-panel TV main board under dynamic video workload. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated core voltage with <15 mVPP ripple. Use Value: D-CAP2™ fast transient response maintains output within ±1% during 1-A load steps, eliminating need for large bulk capacitance. | Use Scenario: Supplies 1.2 V/3 A to BD-ROM controller ASIC during disc read/write bursts. IC Role / Device Role / Timing Role: Point-of-load converter with pre-biased soft start preventing brownout when system wakes from standby. Use Value: 74 mΩ high-side FET and 650-kHz switching minimize size of inductor (1.5 µH) and total solution footprint. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Generates 3.3 V/2 A for Ethernet PHY and packet processor in residential gateway. IC Role / Device Role / Timing Role: Secondary buck regulator supporting multiple voltage domains with independent enable control. Use Value: EN pin logic interface allows coordinated power-up sequence with FPGA and memory subsystems. | Use Scenario: Delivers 1.8 V/2.5 A to video decoder SoC in cable/satellite STB with rapid channel-change requirements. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in forced CCM to maintain regulation during burst-mode video decoding. Use Value: 18.2 °C/W RθJB enables full 2.5-A load at 85°C ambient without heatsink, simplifying mechanical design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54327DRCR | 3-A output rating, identical 10-pin VSON package, same D-CAP2™ control and pinout. | Lower current capacity; suitable where peak load ≤3 A and thermal margin is constrained. | Select when system max load is ≤3 A and board space or BOM cost optimization is prioritized over headroom. |
| MP2315GJ-Z | 4-A rating, 650-kHz fixed frequency, external compensation required, different pinout (8-pin TSOT23-8). | Lacks pre-biased soft start and VREG5 LDO; requires additional bias supply and compensation network. | Choose only if existing layout accommodates TSOT23-8 and design team prefers traditional voltage-mode control with tuning flexibility. |
Compared with TPS54427DRCR, TPS54327DRCR offers identical integration and layout compatibility at reduced current capacity, while MP2315GJ-Z trades D-CAP2™ simplicity for external compensation and lacks integrated bias generation-increasing component count and design validation effort.
Availability
TPS54427DRCR is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player core rails, and networking home terminals requiring stable component supply, long-term production continuity, and automotive-grade reliability screening.
Supply support for TPS54427DRCR 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 company headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and power management solutions for industrial, automotive, and consumer markets.
The TPS54427DRCR belongs to TI's D-CAP2™ synchronous buck converter product line, engineered specifically for high-efficiency, low-component-count point-of-load regulation in space-constrained consumer electronics with stringent transient response requirements.
FAQ
What is the recommended input capacitor configuration for TPS54427DRCR?
TPS54427DRCR requires a minimum 10-µF ceramic input capacitor placed close to VIN and GND pins, plus an optional 0.1-µF high-frequency ceramic capacitor (C3) from VIN to GND. Bulk capacitance beyond 10 µF may be added depending on input source impedance and ripple requirements. The capacitor voltage rating must exceed the maximum input voltage (≥20 V recommended for 18-V max operation). Proper placement minimizes switching loop inductance and reduces input voltage spikes.
Does TPS54427DRCR support pre-biased output startup?
Yes, TPS54427DRCR includes proprietary pre-biased soft-start circuitry that prevents reverse current flow during startup when the output is already charged. When the soft-start voltage exceeds the pre-bias level, the controller incrementally increases low-side FET on-time cycle-by-cycle until reaching normal operation-ensuring smooth ramp-up without output voltage collapse or inrush stress on downstream components.
What is the function of the VREG5 pin on TPS54427DRCR?
The VREG5 pin on TPS54427DRCR provides a regulated 5.5-V output (±0.3 V) capable of sourcing up to 60 mA. It powers the internal high-side gate driver and control circuitry. A 1-µF ceramic capacitor must be connected from VREG5 to GND. VREG5 is inactive when EN is low, and its UVLO threshold (3.75 V) also serves as the main undervoltage lockout trigger for the entire device.
Can TPS54427DRCR operate with ceramic output capacitors only?
Yes, TPS54427DRCR is explicitly designed for use with ultra-low-ESR ceramic output capacitors-no electrolytic or polymer capacitors required. Its D-CAP2™ control architecture includes internal ripple simulation, eliminating dependency on capacitor ESR for stability. Recommended values range from 22 µF to 68 µF total capacitance, with typical ESR ≤2 mΩ per capacitor, enabling compact, high-reliability output filtering.
What thermal performance can be expected from TPS54427DRCR in a standard 4-layer PCB layout?
In a standard 4-layer PCB with 2-in² 2-oz copper thermal pad connected to the exposed PGND pad, TPS54427DRCR achieves RθJB = 18.2 °C/W. At 4-A load and 12-V input, typical power dissipation is ~1.1 W, resulting in ~20°C junction-to-board temperature rise above ambient. This enables full-rated operation up to 85°C ambient without forced airflow or heatsinks-validated per JEDEC JESD51-7 standards.
TPS54427DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™
- 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)
TPS54427DRCR FAQ
1.How can I place an order for TPS54427DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54427DRCR 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 TPS54427DRCR reliable?
The price and inventory of TPS54427DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54427DRCR is usually 5 days.
3.What payment methods are accepted for TPS54427DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54427DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54427DRCR?
TPS54427DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54427DRCR 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 TPS54427DRCR?
For technical support, including TPS54427DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54427DRCR requirements.
6.How does Aetrix verify that TPS54427DRCR is sourced from the original manufacturer or authorized distributors?
All TPS54427DRCR 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 TPS54427DRCR meets industry standards.
7.What is the process for return or replacement of TPS54427DRCR?
All TPS54427DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54427DRCR, 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 TPS54427DRCR part is unused and in its original packaging.
Return procedure for TPS54427DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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