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Infineon Technologies TDA38813XUMA1
- Part No.:
- TDA38813XUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 21-PowerUFQFN
- Datasheet:
-
TDA38813XUMA1.pdf
- Description:
- IC REG BUCK ADJ 12A TSNP-21-1
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TDA38813XUMA1 from Infineon is a 12 A synchronous buck regulator with fast Constant On-Time (COT) control, 4–16 V input range (2.7 V with external VCC), 0.9 V ±0.5% reference, and QFN-21 (3 mm × 4 mm) package. It delivers high efficiency in server point-of-load applications requiring tight regulation, fast transient response, and programmable soft-start (≥1.5 ms).
For engineers reviewing the TDA38813XUMA1 datasheet, TDA38813XUMA1 pinout, TDA38813XUMA1 application, or TDA38813XUMA1 equivalent, key selection criteria include its selectable switching frequency (600/800/1000 kHz), thermally compensated overcurrent protection, voltage tracking capability via SS/VREF, and support for both FCCM and diode emulation modes.
Technical Context
The TDA38813XUMA1 implements a fast COT control architecture that eliminates external compensation while maintaining stable operation with ceramic output capacitors. Its adaptive on-time generator enables pseudo-constant frequency behavior across line and load variations, achieving <10 µs load transient recovery under 50% step load change.
It integrates dual-mode operation-FCCM for low-noise continuous conduction and DEM for light-load efficiency-with mode selection via the MODE pin. The internal 3 V LDO powers gate drivers and logic, and the CS pin supports precise current limit programming using an external resistor tied to AGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12 A continuous; supports full-rated load without derating up to Tj = 105 °C in typical PCB layout. |
| Input Voltage Range | 4–16 V with internal bias; extends to 2.7–16 V when external 3.3 V applied to VCC pin. |
| Reference Voltage | 0.9 V ±0.5%; enables accurate output setting (e.g., 1.2 V via 1:1/3 divider) with minimal drift over temperature. |
| Switching Frequency | Selectable 600 / 800 / 1000 kHz; higher frequencies reduce inductor size but increase switching loss. |
| Soft-Start Time | Programmable ≥1.5 ms via capacitor on SS/VREF; prevents inrush current during power-up. |
| Thermal Shutdown | Latch-off at Tj ≥ 150 °C; ensures safe shutdown during sustained overload or poor heatsinking. |
| Protection Features | Latch-off OCP, UVP, OVP, and thermal shutdown; pre-bias start-up avoids output voltage collapse on powered rails. |
Pinout & Package
Package: QFN-21, 3 mm × 4 mm, 0.5 mm pitch, exposed thermal pad (PGND-connected). RoHS-compliant, halogen-free, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | Floating supply for high-side driver | Requires ceramic bootstrap capacitor between BST and SW to sustain gate drive above VIN during HS-FET conduction. |
| CS (Pin 3) | Current sense input | Connects to AGND via precision resistor; sets overcurrent trip threshold with internal thermal compensation. |
| MODE (Pin 4) | Operating mode select | Voltage-programmed pin selecting CCM/DEM and switching frequency (600/800/1000 kHz). |
| SS/VREF (Pin 5) | Soft-start timing & external reference | Capacitor value sets soft-start duration; also accepts external voltage for output tracking applications. |
| FB (Pin 7) | Feedback node | High-impedance input for resistor divider; requires feedforward capacitor (CFF) to FB for optimal transient response. |
| EN (Pin 8) | Enable control | Active-high logic input; internal 2.8 V threshold with hysteresis; supports sequencing via resistive divider from VIN. |
| PGOOD (Pin 9) | Power-good status | Open-drain output asserting high when VOUT is within ±8% of target; requires external pull-up resistor. |
| VIN (Pins 10, 21) | Main power input | Dual pins reduce IR drop and improve current sharing; must be decoupled near PGND with low-ESR ceramics. |
| PGND (Pins 11–18) | Power ground return | Eight dedicated pins minimize ground impedance; must connect directly to thermal pad and input/output capacitor grounds. |
| VCC (Pin 19) | Internal LDO output | 3 V regulated supply for control circuitry; requires ≥1 µF X7R/X5R ceramic bypass close to pin. |
| SW (Pin 20) | Switch node | Drives external inductor; high dV/dt node requiring minimized loop area and guard ring for EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| No external compensation required | Enables stable operation with any ceramic output capacitor ≥22 µF; eliminates tuning effort and component count. |
| Programmable soft-start time | Minimum 1.5 ms set by SS/VREF capacitor; prevents inrush into pre-biased outputs and reduces stress on input capacitors. |
| Voltage tracking capability | SS/VREF accepts external reference (e.g., from upstream rail); allows coordinated ramp-up in multi-rail systems like CPU core/memory domains. |
| Thermally compensated current limit | CS pin current threshold adjusts with junction temperature to maintain consistent OCP trip across -40 °C to 125 °C. |
| Pre-bias start-up support | Allows safe startup into pre-charged output without reverse current flow or output collapse. |
Applications
| Server Core Voltage Regulation | Storage Controller Power |
|---|---|
Use Scenario: Regulating 1.2 V core supply for dual-socket x86 servers with dynamic load steps up to 10 A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 12 A with fast COT control and <10 µs transient recovery. Use Value: Maintains ±1% output regulation during CPU burst loads, reducing need for bulk output capacitance by 30% vs. voltage-mode controllers. | Use Scenario: Powering NVMe SSD controller ASICs requiring tightly regulated 1.8 V at up to 8 A with sequencing relative to 3.3 V I/O rail. IC Role / Device Role / Timing Role: Point-of-load regulator with voltage tracking via SS/VREF pin synchronized to upstream 3.3 V rail. Use Value: Enables monotonic startup across dual rails, eliminating latch-up risk during hot-plug events in enterprise storage enclosures. |
| Telecom Baseband Processing | Datacom Switch ASIC Core |
Use Scenario: Supplying 0.85 V @ 10 A to FPGA-based baseband processors in 5G radio units with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency buck converter operating at 800 kHz with FCCM mode to suppress sub-harmonic noise in sensitive RF bands. Use Value: Achieves >92% peak efficiency at 12 V input, reducing thermal load in sealed outdoor enclosures without forced airflow. | Use Scenario: Delivering 0.75 V @ 12 A to multi-core switch ASICs in 100 GbE line cards with tight board space constraints. IC Role / Device Role / Timing Role: Compact 3 mm × 4 mm integrated buck regulator supporting 1 MHz switching for minimal inductor footprint. Use Value: Enables use of 0.22 µH inductors (vs. 0.47 µH at 600 kHz), saving >25 mm² PCB area per rail in dense line card layouts. |
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-Z (Monolithic Power) | 12 A rating, 4.5–18 V input, fixed 600 kHz fSW, no external VCC option, no voltage tracking. | Lacks SS/VREF tracking and external VCC flexibility; simpler enable/power-good interface. | Preferred where cost sensitivity outweighs multi-rail coordination needs and input range stays >4.5 V. |
| TPS546D24ARVFT (TI) | 15 A rating, 4–18 V input, PMBus interface, digital loop compensation, 400–2000 kHz programmable fSW. | Supports telemetry, margining, and fault logging; requires firmware integration and additional PMBus components. | Chosen when system-level monitoring, dynamic reconfiguration, or compliance with IPC-9592B is mandatory. |
Compared with MP2964GQ-Z, the TDA38813XUMA1 offers wider input flexibility and voltage tracking but lacks digital interface; versus TPS546D24ARVFT, it trades telemetry for lower BOM count and faster analog transient response in fixed-function PoL designs.
Availability
TDA38813XUMA1 is available at Aetrix Electronics and suitable for server power delivery, telecom baseband processing, and datacom switch ASIC core regulation requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.
Supply support for TDA38813XUMA1 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 leadership in silicon and GaN-based power conversion solutions.
The TDA38813 belongs to Infineon's TDA series of highly integrated DC-DC buck regulators, designed specifically for high-current, high-efficiency point-of-load applications in datacenter and communications infrastructure.
FAQ
What input voltage configurations does the TDA38813XUMA1 support?
The TDA38813XUMA1 operates from 4 V to 16 V using internal bias, or extends down to 2.7 V when an external 3.3 V supply is applied to the VCC pin. This dual-input capability enables compatibility with diverse intermediate bus architectures, including 3.3 V, 5 V, and 12 V distribution networks common in telecom and server platforms.
How is overcurrent protection configured and how does thermal compensation work?
OCP is set by a resistor from CS pin to AGND, with trip threshold scaling linearly with resistance value. Internal thermal compensation adjusts the current limit downward as junction temperature rises, maintaining consistent fault protection across -40 °C to 125 °C without external calibration or lookup tables.
Can the TDA38813XUMA1 safely start into a pre-biased output?
Yes - the TDA38813XUMA1 includes dedicated pre-bias start-up circuitry that disables the high-side FET until the feedback voltage reaches regulation, preventing reverse current flow and output voltage collapse. This feature is enabled by default and requires no external configuration.
What layout considerations are critical for thermal performance?
Maximizing thermal performance requires soldering the exposed thermal pad (under the QFN-21 body) to a minimum 100 mm² copper pour connected to ≥4 thermal vias (0.3 mm diameter) to inner ground planes. VIN, PGND, and SW traces must be wide and short, and the BST capacitor must be placed adjacent to the BST/SW pins with minimal loop area.
TDA38813XUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 21-PowerUFQFN
- 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):
- 2.7V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 12A
- Frequency - Switching:
- 600kHz, 800kHz, 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TSNP-21-1
TDA38813XUMA1 FAQ
1.How can I place an order for TDA38813XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA38813XUMA1 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 TDA38813XUMA1 reliable?
The price and inventory of TDA38813XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA38813XUMA1 is usually 5 days.
3.What payment methods are accepted for TDA38813XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA38813XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA38813XUMA1?
TDA38813XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA38813XUMA1 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 TDA38813XUMA1?
For technical support, including TDA38813XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA38813XUMA1 requirements.
6.How does Aetrix verify that TDA38813XUMA1 is sourced from the original manufacturer or authorized distributors?
All TDA38813XUMA1 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 TDA38813XUMA1 meets industry standards.
7.What is the process for return or replacement of TDA38813XUMA1?
All TDA38813XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA38813XUMA1, 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 TDA38813XUMA1 part is unused and in its original packaging.
Return procedure for TDA38813XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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