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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Infineon Technologies TDA38827AUMA1

Name: TDA38827AUMA1
Brand: Infineon Technologies
SKU: TDA38827AUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA38827AUMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 22-PowerVQFN

Datasheet:: TDA38827AUMA1.pdf

Description:: IC REG BUCK ADJ 25A 22IQFN

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Product details

Overview

TDA38827AUMA1 from Infineon Technologies is a fully integrated synchronous Buck regulator with integrated OptiMOS™ power FETs, delivering up to 25 A output current. It operates from a single 4.3–17 V input or extends down to 2.0 V with external VCC bias, features a 0.6 V ±0.5% reference, fast Constant On-Time (COT) control, and supports programmable switching frequency (600 kHz–2 MHz). It is used in high-density server point-of-load (POL) supplies.

For engineers reviewing the TDA38827AUMA1 datasheet, TDA38827AUMA1 pinout, TDA38827AUMA1 application, or TDA38827AUMA1 equivalent, key selection criteria include its monotonic soft-start, thermally compensated OCP with four settings, pre-bias start-up capability, FCCM/DEM mode selection, and PGND/AGND separation for noise-sensitive analog feedback paths.

Technical Context

The TDA38827AUMA1 implements a fast COT control architecture with adaptive on-time generation, enabling stable regulation with ceramic output capacitors without external compensation. Its internal LDO powers the controller from PVIN or an external VCC, supporting dual-input operation modes.

It integrates high- and low-side OptiMOS™ MOSFETs with bootstrap gate drive, uses VSNS for independent overvoltage monitoring and PGood assertion, and provides four selectable soft-start times and four OCP thresholds via resistor-programmed pins (SS/Latch and ILIM), all validated across –40 °C to +125 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	25 A continuous - supports high-current POL rails without external FETs or controllers.
Input Voltage Range	4.3–17 V (single supply) or 2.0–17 V (with external VCC) - enables flexible biasing in multi-rail systems.
Reference Voltage	0.6 V ±0.5% - ensures tight output voltage accuracy (±1% typical at 1.0 V out) for CPU/GPU core rails.
Switching Frequency	600 kHz–2 MHz (8-step programmable via Rt/MODE) - balances efficiency, size, and EMI in dense layouts.
Soft-Start Time	Four selectable options (0.5/1/2/4 ms) via SS/Latch pin - prevents inrush current in cascaded power stages.
OCP Threshold	Four user-selectable limits (18/22/25/28 A) via ILIM resistor - allows precise current limiting aligned with downstream component ratings.
Thermal Shutdown	Active at T_j ≥ 150 °C with hysteresis - protects against sustained overload or airflow loss in enclosed chassis.

Pinout & Package

Package: 6 mm × 5 mm PQFN (17-pin, exposed thermal pad), halogen-free and RoHS2-compliant with exemption 7a.

Pin/Terminal	Circuit Role	Design Meaning
FB	Voltage feedback input	Connects to output divider to set regulated voltage; referenced to AGND, not PGND - critical for noise immunity.
SS/Latch	Soft-start timing & OVP latch control	Resistor-to-ground selects one of four soft-start durations and configures latched vs. hiccup OVP response.
Rt/MODE	Frequency & operation mode selector	Resistor sets switching frequency (600 kHz–2 MHz) and chooses FCCM (continuous) or DEM (light-load efficiency).
ILIM	Over-current protection threshold	Resistor-to-ground selects one of four OCP trip points (18/22/25/28 A) with thermal compensation.
PGood	Open-drain power-good status	Asserts high when output is within ±10% of target; requires external pull-up to VCC or system rail (e.g., 3.3 V).
VSNS	Independent OVP and PGood sense	Monitors output independently of FB path; enables accurate OVP even with remote sensing or divider mismatch.
VIN	LDO input supply	Accepts 4.3–17 V for internal LDO; if external VCC is used, short VIN to VCC/LDO and share bypass capacitor.
VCC/LDO	Bias supply I/O	Supplies controller logic; can be driven externally (2.5–5.5 V) to extend input range or sourced internally from VIN.
PVIN	Main power stage input	High-current input (up to 25 A) for integrated FETs; requires low-ESR bulk capacitance near package.
SW	Power switch node	Connects directly to output inductor; high di/dt node requiring tight layout and Kelvin connection to BOOT.
BOOT	High-side gate driver supply	Connected to SW via 0.1 µF ceramic bootstrap capacitor; enables N-channel high-side FET drive.
EN	Enable input with UVLO	Active-high enable with built-in under-voltage lockout (~2.2 V threshold); monitors VCC/LDO for safe startup.
AGND	Analog ground reference	Separate ground for FB, SS/Latch, Rt/MODE, ILIM, VSNS - must tie to PGND at single point near IC.
PGND	Power ground return	Low-impedance return path for PVIN, SW, and VCC/LDO bypass caps; connects to system power plane.
NC (Pins 3,16)	No connect	Internally unconnected; may be left floating or tied to AGND/PGND per layout needs - no electrical function.

Key Features

Feature	Design Value
Integrated OptiMOS™ FETs + PWM controller	Eliminates external MOSFETs, drivers, and compensation components - reduces BOM count and PCB area by >40% vs. discrete solutions.
Fast COT control with ceramic-cap stability	Enables use of small, low-ESR ceramic output capacitors without phase compensation networks - simplifies design and improves transient response.
Pre-bias start-up support	Allows safe startup into pre-charged output rails (e.g., hot-swap or cascaded converters) without reverse current or latch-up.
Thermally compensated OCP	OCP threshold scales with junction temperature to maintain consistent current limit across –40 °C to +125 °C - avoids false trips at cold start or derating at high temp.
Four-mode soft-start configuration	Enables matching of ramp rate to downstream load requirements (e.g., 0.5 ms for FPGA I/O, 4 ms for CPU cores) - prevents undershoot/overshoot during power-up.

Applications

Server Core Voltage Regulation

Storage Controller Power

Use Scenario: Regulating 0.8–1.2 V core supply for dual-socket Xeon processors in 1U rack servers with strict space constraints.

IC Role / Device Role / Timing Role: Primary POL regulator delivering 25 A with <10 µs transient response; manages sequencing via EN and PGood handshake with BMC.

Use Value: Integrated FETs and COT control reduce output capacitance by 30% vs. traditional controllers, enabling compact VR13-compatible designs.

Use Scenario: Powering NVMe SSD controllers and DRAM buffers in enterprise storage enclosures with ambient temperatures up to 70 °C.

IC Role / Device Role / Timing Role: High-efficiency 1.8 V/3.3 V auxiliary rail generator; operates in DEM mode during idle to maintain >85% efficiency at 100 mA load.

Use Value: Four selectable OCP thresholds allow tuning to SSD power envelope (e.g., 22 A peak), preventing unnecessary shutdown during burst writes.

Telecom Baseband Processing

Datacom Switch ASIC Supply

Use Scenario: Providing 1.0 V @ 20 A to 5G baseband SoCs in outdoor small cells with wide ambient temperature swings (–40 °C to +85 °C).

IC Role / Device Role / Timing Role: Main SoC rail regulator with monotonic soft-start and pre-bias capability to survive brownout recovery in battery-backed units.

Use Value: Thermally compensated OCP ensures consistent current limiting across full operating range - eliminates need for derating at high ambient.

Use Scenario: Delivering 0.75 V @ 25 A to 100G Ethernet switch ASICs in modular line cards with strict EMI limits.

IC Role / Device Role / Timing Role: High-frequency (1.5 MHz) POL regulator; uses programmable frequency to shift switching noise above sensitive SerDes bands.

Use Value: Fast COT control achieves <20 mV output deviation during 10 A/µs load steps - meets IEEE 802.3ap jitter specs for backplane links.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous Buck regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2964GQ from Monolithic Power Systems	20 A rated, 4.5–18 V input, fixed 600 kHz frequency, no external VCC option	Lacks pre-bias start-up and thermally compensated OCP; limited to simpler industrial loads	Choose when cost sensitivity outweighs robustness requirements and thermal margin is ample.
TPS546D24A from Texas Instruments	30 A rated, 3–18 V input, PMBus interface, digital loop compensation	Requires external FETs and complex configuration; supports telemetry and dynamic voltage scaling	Choose when digital monitoring, margining, or multi-phase synchronization is required.

Compared with MP2964GQ and TPS546D24A, the TDA38827AUMA1 offers optimal integration for analog-controlled, high-reliability POL applications - balancing current capability, thermal resilience, and layout simplicity without sacrificing protection or startup robustness.

Availability

TDA38827AUMA1 is available at Aetrix Electronics and suitable for server power delivery, telecom baseband supplies, and datacom switch ASIC rails requiring stable component supply, long-term lifecycle support, and qualified industrial-grade reliability.

Supply support for TDA38827AUMA1 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 is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global manufacturing and qualification infrastructure.

The TDA38827 belongs to Infineon's OptiMOS™ IPOL family - designed specifically for high-current, low-voltage point-of-load regulation in space-constrained computing and communications infrastructure.

FAQ

What is the minimum recommended output capacitance for stable operation?

The TDA38827AUMA1 is stable with ≥220 µF total ceramic output capacitance (X5R/X7R, 6.3 V rating), distributed across multiple parallel devices. This value satisfies ESR and ESL requirements for fast COT control loop stability and meets transient response targets for 25 A step loads. Bulk electrolytic capacitors are not required, but adding 10–22 µF tantalum can improve low-frequency hold-up.

Can the TDA38827AUMA1 operate without an external VCC supply?

Yes - the device operates from a single PVIN supply (4.3–17 V) using its internal LDO to power the controller. The VIN pin must be decoupled with a 4.7 µF ceramic capacitor to PGND. External VCC is optional and only needed to extend the input range below 4.3 V or improve light-load efficiency in certain configurations.

How does the SS/Latch pin affect overvoltage protection behavior?

The SS/Latch pin selects between latched-off and hiccup-mode OVP responses. When pulled to AGND with ≤10 kΩ, OVP triggers permanent shutdown until EN is cycled. With >100 kΩ, OVP enters hiccup mode (20 ms off-time) for automatic recovery. This setting also determines soft-start duration - critical for coordinating with upstream regulators in multi-stage power trees.

Is the AGND and PGND separation mandatory in PCB layout?

Yes - AGND and PGND are isolated internally and must connect at a single point near the IC's thermal pad. Separating analog and power grounds prevents switching noise from corrupting FB, VSNS, and current-sense signals. Failure to observe this causes output voltage inaccuracy (>±2%), PGood glitches, and erratic OCP triggering under load transients.

TDA38827AUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: OptiMOS™ IPOL

Package/Case:: 22-PowerVQFN

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):: 2V

Voltage - Input (Max):: 17V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 17V

Current - Output:: 25A

Frequency - Switching:: 600kHz ~ 2MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-IQFN-22-2

TDA38827AUMA1 FAQ

1.How can I place an order for TDA38827AUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA38827AUMA1 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 TDA38827AUMA1 reliable?

The price and inventory of TDA38827AUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA38827AUMA1 is usually 5 days.

3.What payment methods are accepted for TDA38827AUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA38827AUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA38827AUMA1?

TDA38827AUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA38827AUMA1 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 TDA38827AUMA1?

For technical support, including TDA38827AUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA38827AUMA1 requirements.

6.How does Aetrix verify that TDA38827AUMA1 is sourced from the original manufacturer or authorized distributors?

All TDA38827AUMA1 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 TDA38827AUMA1 meets industry standards.

7.What is the process for return or replacement of TDA38827AUMA1?

All TDA38827AUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA38827AUMA1, 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 TDA38827AUMA1 part is unused and in its original packaging.

Return procedure for TDA38827AUMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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