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Infineon Technologies TDA38725A0000AUMA1
- Part No.:
- TDA38725A0000AUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 36-PowerVFQFN
- Datasheet:
-
TDA38725A0000AUMA1.pdf
- Description:
- OPTIMOS IPOL TDA38640A, TDA38740
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
TDA38725A0000AUMA1 from Infineon is a 25 A single-voltage synchronous buck regulator with integrated OptiMOS™ FETs, PMBus interface, and fast Constant On-Time (COT) control. It operates from 4.5 V to 17 V input, delivers 0.25 V–5.12 V output, supports 400 kHz–2 MHz programmable switching frequency (excluding 1600 kHz), and features monotonic soft-start, pre-bias start-up, and thermally compensated over-current protection - deployed in server VR13/VR14 point-of-load systems.
For engineers reviewing the TDA38725A0000AUMA1 datasheet, TDA38725A0000AUMA1 pinout, TDA38725A0000AUMA1 application, or TDA38725A0000AUMA1 equivalent, key selection criteria include its 25 A continuous output current rating, PMBus telemetry for real-time voltage/current/temperature/power monitoring, eight selectable OCP thresholds, digitally programmable load-line, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The device implements a fast COT control architecture with internal bootstrap diode and dual-loop sensing (differential VOSEN+/-), enabling sub-100 ns transient response and stable regulation with low-ESR ceramic capacitors. Its PMBus v1.3-compliant interface supports 11-bit linear data format for telemetry and allows full configuration via XDP Designer GUI or direct register writes.
It integrates an internal LDO for VCC generation, supports both FCCM and diode emulation modes, and uses thermal compensation in its over-current protection circuitry across –40 °C to +125 °C junction temperature range. Pin-strappable and MTP-programmable configurations enable flexible deployment across VR13/VR14, AVS, and adaptive voltage scaling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 25 A continuous - supports high-density server CPU/GPU core rail delivery without external current sharing. |
| Input Voltage Range | 4.5 V to 17 V - compatible with standard 12 V intermediate bus architectures in datacom equipment. |
| Output Voltage Range | 0.25 V to 5.12 V - covers DDR memory, FPGA, ASIC, and SoC core supply requirements via resistor divider or PMBus command. |
| Switching Frequency | 400 kHz to 2 MHz (200 kHz steps, excluding 1600 kHz) - enables optimization of efficiency vs. size trade-off in compact PoL designs. |
| PMBus Interface | v1.3 compliant - provides real-time telemetry (VOUT, IOUT, TEMP, PIN) and fault logging without additional monitoring ICs. |
| Thermal Protection | Thermally compensated OCP with 8 settings - prevents false triggering during ambient temperature shifts while maintaining accurate current limiting. |
| Soft-Start | Monotonic, PMBus-programmable - eliminates output voltage undershoot/overshoot during power-up in multi-rail systems. |
Pinout & Package
Package: 5 mm × 6 mm PQFN, 33-pin, exposed thermal pad, RoHS2-compliant with exemption 7a, lead-free surface finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input power supply | Accepts 4.5–17 V; connects to bulk input capacitor and high-side FET source. |
| VOUT | Regulated output node | Delivers up to 25 A; connects directly to output inductor and load. |
| VOSENP / VOSENM | Differential output voltage sense inputs | Enables Kelvin sensing for precise regulation under high-current PCB trace IR drop. |
| PGOOD | Power-good status output | Open-drain signal asserted after output reaches ±1% regulation and remains stable for >1 ms. |
| EN | Enable input with voltage monitoring | Active-high; monitors VIN level before enabling regulation; supports sequencing with other rails. |
| SCL / SDA | PMBus serial interface lines | I²C-compatible; support SMBus Alert response and multi-master arbitration per PMBus v1.3. |
| SM_ADDR / PROG | Slave address select / programming mode | Configures PMBus address (0x70–0x77); sets boot mode (MTP vs. pin-strap configuration). |
| AGND / PGND | Analog / power ground returns | Separate ground paths minimize noise coupling between control circuitry and high-current switching nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Fast COT Control Engine | Stable with ceramic output capacitors only - eliminates need for external compensation network and reduces BOM count by ≥2 components. |
| Digitally Programmable Load-Line | Configurable droop slope via PMBus - enables precise AVS implementation for dynamic voltage/frequency scaling in CPUs/FPGAs. |
| MTP Memory (14 writes) | User-configurable registers stored in on-chip non-volatile memory - retains settings across power cycles without external EEPROM. |
| Pre-Bias Start-Up | Safe ramp-up into pre-charged output - prevents reverse current flow and protects downstream loads during hot-swap or multi-phase sequencing. |
| Thermally Compensated OCP | Eight selectable current limit thresholds with junction temperature scaling - maintains consistent trip point from –40 °C to +125 °C. |
Applications
| Server Core Voltage Regulation | AI Accelerator Power Delivery |
|---|---|
Use Scenario: Regulating core voltage for dual-socket Xeon Scalable processors in 1U/2U rack servers. IC Role / Device Role / Timing Role: Primary VR13/VR14 point-of-load regulator delivering 25 A at 0.8–1.2 V with AVS support. Use Value: PMBus telemetry enables real-time thermal-aware voltage margining and dynamic binning during system validation. | Use Scenario: Powering high-current AI inference accelerators (e.g., AMD Instinct MI300X, NVIDIA H100 SXM5) requiring tight transient response. IC Role / Device Role / Timing Role: Fast-COT-controlled buck stage supplying GPU core rail with <100 ns load-step response. Use Value: Differential sensing and monotonic soft-start prevent rail collapse during simultaneous kernel launch across thousands of cores. |
| Storage Controller Power | Telecom Baseband Unit |
Use Scenario: Delivering clean, low-noise 1.8 V/3.3 V power to NVMe SSD controllers and PCIe switch logic. IC Role / Device Role / Timing Role: Secondary PoL regulator supporting burst-mode operation and deep-sleep state transitions. Use Value: Diode emulation mode improves light-load efficiency below 100 mA, extending enterprise SSD standby time. | Use Scenario: Supplying 1.0 V core and 1.8 V I/O rails in 5G massive MIMO baseband units with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency, low-RDS(on) buck converter operating at 1 MHz to avoid critical RF bands. Use Value: Integrated OptiMOS FETs and PQFN thermal pad reduce board area by 35% vs. discrete controller+FET solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8772GQ-0000-P | 20 A rated, no PMBus telemetry, analog IOUT monitor only; fixed 600 kHz/1 MHz freq options. | Lacks real-time telemetry and digital load-line; suited for cost-sensitive telecom power where firmware control is minimal. | Select when PMBus telemetry and AVS are not required, and BOM cost reduction is prioritized over configurability. |
| ISL9122IRAJZ-T7A | 15 A rated, I²C interface only (no PMBus commands), no MTP memory; supports 2.5–5.5 V input. | Targeted at portable/embedded applications; lacks thermal OCP compensation and monotonic start-up. | Choose for battery-powered edge AI devices where ultra-low quiescent current and small footprint outweigh telemetry needs. |
Compared with MP8772GQ-0000-P and ISL9122IRAJZ-T7A, TDA38725A0000AUMA1 uniquely combines 25 A capability, full PMBus v1.3 telemetry, monotonic soft-start, and thermally compensated OCP - making it the only option qualified for VR13/VR14-compliant server and AI accelerator core rail designs requiring firmware-managed voltage scaling and fault logging.
Availability
TDA38725A0000AUMA1 is available at Aetrix Electronics and suitable for server motherboard development, AI accelerator module production, and 5G baseband unit manufacturing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TDA38725A0000AUMA1 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global R&D centers and ISO/TS 16949-certified wafer fabs.
This part belongs to the OptiMOS iPOL family - engineered specifically for high-current, digitally controlled point-of-load regulation in next-generation datacenter and AI infrastructure where PMBus telemetry, adaptive voltage scaling, and thermal robustness are mandatory.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The TDA38725A0000AUMA1 is rated for continuous operation with junction temperature between –40 °C and +125 °C. Thermal derating begins above 100 °C ambient depending on PCB copper area and airflow; full 25 A output current is guaranteed up to Tj = 125 °C with proper heatsinking per datasheet Figure 10.
Does this device require external compensation components?
No. The fast Constant On-Time (COT) control architecture is inherently stable with ceramic output capacitors and requires no external compensation network. This eliminates two to four passive components typically needed in voltage-mode or current-mode controllers, reducing design complexity and board space.
Can the output voltage be set without using PMBus commands?
Yes. Output voltage can be set via external resistor divider on VOSENP/VOSENM pins, or through pin-strapping using SM_ADDR/PROG and other configuration pins. The "0000" suffix indicates default PMBus-configurable mode, but hardware-based VOUT setting remains fully supported and functional.
How many times can the MTP memory be reprogrammed in-system?
The MTP memory supports up to 14 write cycles for the USER section. Each write includes full CRC verification and automatic erase-before-write. Field updates are performed via PMBus WRITE_BLOCK command; no special voltage or timing sequences are required beyond standard PMBus protocol compliance.
TDA38725A0000AUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OptiMOS™ IPOL
- Package/Case:
- 36-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.25V
- Voltage - Output (Max):
- 5.12V
- Current - Output:
- 25A
- Frequency - Switching:
- 400kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-IQFN-36-3
TDA38725A0000AUMA1 FAQ
1.How can I place an order for TDA38725A0000AUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA38725A0000AUMA1 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 TDA38725A0000AUMA1 reliable?
The price and inventory of TDA38725A0000AUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA38725A0000AUMA1 is usually 5 days.
3.What payment methods are accepted for TDA38725A0000AUMA1?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA38725A0000AUMA1?
TDA38725A0000AUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA38725A0000AUMA1 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 TDA38725A0000AUMA1?
For technical support, including TDA38725A0000AUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA38725A0000AUMA1 requirements.
6.How does Aetrix verify that TDA38725A0000AUMA1 is sourced from the original manufacturer or authorized distributors?
All TDA38725A0000AUMA1 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 TDA38725A0000AUMA1 meets industry standards.
7.What is the process for return or replacement of TDA38725A0000AUMA1?
All TDA38725A0000AUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA38725A0000AUMA1, 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 TDA38725A0000AUMA1 part is unused and in its original packaging.
Return procedure for TDA38725A0000AUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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