TPS54425PWPR-P Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TPS54425PWPR-P is a synchronous step-down (buck) switching regulator delivering up to 4 A output current with an adjustable output voltage starting from 0.76 V, housed in a 14-pin TSSOP package with an exposed thermal pad. It features wide input voltage range and integrated high- and low-side MOSFETs for high-efficiency DC-DC conversion. Designed for point-of-load power supplies in embedded systems, FPGAs, DSPs, and industrial computing platforms.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 15
- Lifecycle
- ACTIVE
- Datasheet
- TPS54425PWPR-P Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 A continuous output current with integrated synchronous rectifier MOSFETs for high efficiency
- Adjustable output voltage down to 0.76 V for powering FPGA and DSP core rails
- 14-pin TSSOP with exposed thermal pad for enhanced heat dissipation at full 4 A load
- Wide input voltage range compatible with 5 V and 12 V system bus rails
- Integrated bootstrap capacitor and gate driver reduce external component count
- Eco-mode light-load efficiency optimization for standby power reduction
Applications
The TPS54425PWPR-P is used as a point-of-load DC-DC buck converter in FPGA and DSP power supply designs that require tightly regulated core voltages from 0.76 V to 3.3 V at up to 4 A from a 5 V or 12 V input bus. It suits industrial computing modules, embedded server blades, and programmable logic controller (PLC) cards where multiple sub-1 V rails must be generated efficiently from a single board power input. Telecom line cards and test-and-measurement equipment also deploy this regulator for clean, low-noise point-of-load power on analog processing stages requiring stable sub-1 V supplies.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TPS54425PWPR-P:
suggested
suggested
suggested
suggested
Switching Regulator, Voltage-mode, 4A, 700kHz Switching Freq-Max, PDSO14
Switching Regulator, Voltage-mode, 4A, 700kHz Switching Freq-Max, PDSO14
Frequently Asked Questions
What is the maximum output current and minimum output voltage of TPS54425PWPR-P?
TPS54425PWPR-P can supply up to 4 A continuous output current and supports an adjustable output voltage with a minimum of 0.76 V, set by an external resistor divider. This 0.76 V floor makes it directly suitable for powering FPGA core rails, DSP processing planes, and DDR memory termination circuits that require sub-1 V regulated supplies at high current from a 5 V or 12 V input bus.
How does the exposed thermal pad on TPS54425PWPR-P improve thermal performance at 4 A output?
The 14-pin TSSOP exposed thermal pad provides a direct low-resistance thermal path from the IC die to the PCB copper ground plane, significantly reducing junction temperature at 4 A output compared to a standard TSSOP without an exposed pad. Soldering the pad to a 1 oz or 2 oz copper pour with multiple thermal vias typically reduces thermal resistance by 40–60%, allowing the regulator to operate continuously at 4 A in ambient temperatures up to 70°C without a heatsink.
For an FPGA core power rail design, how is the output voltage of TPS54425PWPR-P set to 1.0 V?
The output voltage of TPS54425PWPR-P is set by connecting a resistor divider from the output rail (VOUT) to the feedback pin (FB), with the internal reference at 0.76 V. For a 1.0 V output, the upper resistor (R1) and lower resistor (R2) are calculated as R1 = R2 × (VOUT/VREF − 1) = R2 × (1.0/0.76 − 1) ≈ 0.316 × R2. Using R2 = 10 kΩ gives R1 ≈ 3.16 kΩ, setting the feedback loop to regulate at 1.0 V at up to 4 A for Xilinx or Intel FPGA core rails.
What efficiency advantage does the synchronous rectifier in TPS54425PWPR-P provide over non-synchronous designs at 4 A?
The integrated synchronous low-side MOSFET in TPS54425PWPR-P replaces the external Schottky diode in a non-synchronous buck, reducing conduction losses by replacing the 0.3–0.5 V diode forward voltage drop with a low RDS(on) MOSFET. At 4 A output current, a Schottky diode dissipates approximately 1.2–2.0 W whereas the synchronous MOSFET typically dissipates under 0.5 W, improving efficiency by 5–10 percentage points at medium-to-heavy loads — a critical improvement in FPGA power trees targeting over 90% peak efficiency.
Is TPS54425PWPR-P suitable for automotive or industrial temperature range designs?
TPS54425PWPR-P is rated for operation across the industrial temperature range of -40°C to 85°C ambient, making it appropriate for industrial computing, factory automation, and ruggedized embedded systems. However, for automotive applications requiring AEC-Q100 Grade 1 qualification (up to 125°C), designers should verify the specific -P suffix qualification documentation or consider automotive-specific TPS5442x variants rated for -40°C to 125°C junction temperature in harsh vehicle environments.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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