My Inquiry
My Account
Infineon Technologies TDA38812XUMA1
- Part No.:
- TDA38812XUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 21-PowerUFQFN
- Datasheet:
-
TDA38812XUMA1.pdf
- Description:
- IC REG BUCK ADJ 12A TSNP-21-1
- Quantity:
- Payment:
- Shipping:
Inventory:2,672
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TDA38812XUMA1 from Infineon is a 12 A synchronous Buck regulator with Constant On-Time (COT) control, operating from 2.7 V to 16 V input (with external VCC), delivering precision 0.6 V ±0.5% reference, and supporting selectable 600/800/1000 kHz switching frequency. It integrates high- and low-side MOSFETs in a QFN-21 package and is used in server point-of-load power rails.
For engineers reviewing the TDA38812XUMA1 datasheet, TDA38812XUMA1 pinout, TDA38812XUMA1 application, or TDA38812XUMA1 equivalent, key selection criteria include its thermally compensated current limit, pre-bias start-up capability, voltage tracking support via SS/VREF, and dual-mode operation (FCCM/DEM) for light-load efficiency optimization.
Technical Context
The TDA38812XUMA1 implements a fast Constant On-Time (COT) control architecture that enables sub-10 µs load transient response while maintaining stable regulation across line and load variations. Its adaptive on-time generator dynamically adjusts based on input/output voltage and output capacitor ESR to sustain pseudo-constant frequency behavior.
It integrates an internal 3 V LDO for gate driver bias, supports remote sensing via RGND/FB differential pair, and features valley-current sensing with ZCD for accurate overcurrent protection. The controller includes programmable soft-start (≥1 ms), voltage tracking (SS/VREF), and configurable fault responses including non-latch OCP, latch-off OVP, and thermal shutdown with hiccup mode recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12 A continuous DC output current capability with integrated MOSFETs |
| Input Voltage Range | 2.7 V–16 V with external 3.3 V VCC bias; 4 V–16 V with internal bias - enables wide supply compatibility |
| Reference Voltage | 0.6 V ±0.5% - ensures tight output regulation accuracy across temperature and load |
| Switching Frequency | Selectable 600 / 800 / 1000 kHz - balances efficiency, size, and EMI performance |
| Soft-Start Time | Programmable ≥1 ms via SS/VREF capacitor - prevents inrush current during power-up |
| Operating Junction Temp | −40 °C to +125 °C - qualified for industrial environments per JEDEC47/20/22 |
| Package | QFN-21 (3 mm × 4 mm, 0.5 mm pitch) - compact footprint with exposed thermal pad for PCB heat dissipation |
Pinout & Package
Package: QFN-21 (3 mm × 4 mm, 0.5 mm pitch), thermally enhanced with exposed PGND pad. Pin 1 marked by dot; pins numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST (Pin 1) | Floating bootstrap supply node | Connects to SW via ceramic capacitor to bias high-side gate driver; critical for proper HS-FET turn-on |
| AGND (Pin 2) | Analog ground reference | Control circuit reference point; must be isolated from PGND except at single-point star connection |
| CS (Pin 3) | Current sense input | Connects to AGND via resistor to set thermally compensated overcurrent threshold (ILIM) |
| MODE (Pin 4) | Mode/frequency select | Voltage-programmed input to select FCCM/DEM and 600/800/1000 kHz switching frequency |
| SS/VREF (Pin 5) | Soft-start & tracking reference | Accepts external voltage for tracking; capacitor value sets soft-start time and filters reference noise |
| RGND (Pin 6) | Remote sense return | Differential negative input for remote sensing; short to GND if local sensing only |
| FB (Pin 7) | Feedback input | Resistor divider tap point for output voltage regulation; requires feedforward capacitor for transient stability |
| EN (Pin 8) | Enable control | Active-high logic input with internal voltage monitoring; pull-up to VIN enables automatic startup |
| PGOOD (Pin 9) | Power-good indicator | Open-drain output asserting when FB is within ±8% of target; requires external pull-up resistor |
| VIN (Pins 10, 21) | Main power input | High-current input for internal FETs and regulator; requires low-ESR bulk + ceramic decoupling near PGND |
| PGND (Pins 11–18) | Power ground return | Low-impedance return path for high di/dt currents; must connect directly to thermal pad and input/output caps |
| VCC (Pin 19) | Internal LDO output | 3 V regulated supply for gate drivers and analog circuits; requires ≥1 µF X7R/X5R ceramic bypass |
| SW (Pin 20) | Switch node | Connection point between internal HS-FET drain and LS-FET source; drives external inductor |
Key Features
| Feature | Design Value |
|---|---|
| No external compensation required | Integrated COT loop eliminates need for type-II/type-III compensation network - reduces BOM count and layout sensitivity |
| Stable with ceramic output capacitors | Supports low-ESR ceramic output caps without oscillation - enables smaller, higher-reliability output filtering |
| Pre-bias start-up capability | Allows safe startup into pre-charged output rail - prevents reverse current flow and protects downstream loads |
| Thermally compensated current limit | ILIM threshold automatically adjusts with junction temperature - maintains consistent overcurrent protection across operating range |
| Voltage tracking with external reference | SS/VREF accepts external voltage ramp to synchronize output rise with master rail - essential for multi-rail sequencing |
Applications
| Server Point-of-Load Regulation | Storage Controller Power |
|---|---|
Use Scenario: Providing 0.6–1.2 V at up to 12 A to CPU/GPU core rails in 1U/2U rack servers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator implementing fast transient response for dynamic workload changes. Use Value: COT control delivers <10 µs load step response, minimizing output droop during burst-mode compute cycles. | Use Scenario: Powering NVMe SSD controllers and FPGA-based storage accelerators requiring tightly regulated 1.8 V or 3.3 V rails. IC Role / Device Role / Timing Role: High-efficiency, low-noise POL regulator with programmable soft-start for controlled power sequencing. Use Value: Diode emulation mode (DEM) improves light-load efficiency below 10% load - critical for idle-state power savings. |
| Telecom Baseband Processing | Distributed Datacom Power |
Use Scenario: Supplying 0.85 V @ 10 A to ASIC-based baseband processors in 5G macro/micro base stations. IC Role / Device Role / Timing Role: Industrial-grade POL converter with −40 °C to +125 °C operation and latch-off OVP for system safety. Use Value: Thermal shutdown with hiccup mode prevents sustained fault conditions - enhances field reliability in sealed enclosures. | Use Scenario: Delivering scalable 1.0–1.8 V rails to switch fabric ASICs and SerDes transceivers in modular datacom chassis. IC Role / Device Role / Timing Role: Configurable buck regulator supporting voltage tracking across multiple rails using shared SS/VREF reference. Use Value: External reference input enables precise rail-to-rail tracking tolerance ≤±2 mV - meets strict sequencing specs. |
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, requires external compensation | Lacks voltage tracking, pre-bias start-up, and DEM mode - less suitable for multi-rail telecom systems | Preferred where cost-sensitive designs accept reduced feature set and fixed frequency |
| TPS546D24A (Texas Instruments) | 15 A rating, 3–18 V input, PMBus interface, digital loop compensation, 400 kHz–2 MHz fSW | Includes telemetry, margining, and fault logging - adds complexity but enables system-level power management | Chosen when digital control, real-time monitoring, or firmware-upgradable parameters are required |
Compared with MP2964GQ-Z, TDA38812XUMA1 offers superior light-load efficiency and simpler analog design; versus TPS546D24A, it trades digital configurability for lower BOM cost and faster analog transient response.
Availability
TDA38812XUMA1 is available at Aetrix Electronics and suitable for server power delivery, telecom baseband supplies, and distributed datacom point-of-load applications requiring stable component supply, industrial temperature operation, and long-term lifecycle support.
Supply support for TDA38812XUMA1 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, industrial, and security ICs, with global manufacturing and R&D infrastructure.
The TDA38812 belongs to Infineon's TDA series of highly integrated POL regulators, designed specifically for high-current, high-efficiency, and space-constrained server and datacenter applications.
FAQ
What is the minimum recommended input voltage for reliable operation with internal bias?
The TDA38812XUMA1 requires a minimum 4 V input when using internal bias. Below 4 V, an external 3.3 V VCC supply must be provided to maintain full functionality, including gate drive strength and control loop stability. This dual-bias architecture ensures operation down to 2.7 V input in systems with dedicated bias rails.
How does the MODE pin configure switching frequency and operation mode?
The MODE pin accepts three distinct voltage levels: 0.4 V selects Diode Emulation Mode (DEM) at 600 kHz, 1.2 V selects Forced Continuous Conduction Mode (FCCM) at 800 kHz, and 2.0 V selects FCCM at 1 MHz. Each setting configures both frequency and conduction mode simultaneously via internal resistor ladder decoding.
Can the TDA38812XUMA1 safely start into a pre-biased output?
Yes - the TDA38812XUMA1 includes dedicated pre-bias start-up circuitry that disables the high-side FET until the output voltage falls below the programmed soft-start ramp. This prevents reverse current flow through the low-side FET and avoids damaging downstream components during hot-insertion scenarios.
What thermal derating applies above 85 °C ambient temperature?
At ambient temperatures above 85 °C, the TDA38812XUMA1's maximum output current must be linearly derated from 12 A at 85 °C to 0 A at 125 °C junction temperature. Derating assumes 4-layer PCB with 2 oz copper, 1 in² thermal pad area, and 200 LFM airflow - actual limits depend on measured θJA in the final layout.
TDA38812XUMA1 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):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- 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
TDA38812XUMA1 FAQ
1.How can I place an order for TDA38812XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA38812XUMA1 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 TDA38812XUMA1 reliable?
The price and inventory of TDA38812XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA38812XUMA1 is usually 5 days.
3.What payment methods are accepted for TDA38812XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA38812XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA38812XUMA1?
TDA38812XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA38812XUMA1 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 TDA38812XUMA1?
For technical support, including TDA38812XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA38812XUMA1 requirements.
6.How does Aetrix verify that TDA38812XUMA1 is sourced from the original manufacturer or authorized distributors?
All TDA38812XUMA1 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 TDA38812XUMA1 meets industry standards.
7.What is the process for return or replacement of TDA38812XUMA1?
All TDA38812XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TDA38812XUMA1, 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 TDA38812XUMA1 part is unused and in its original packaging.
Return procedure for TDA38812XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDA38812XUMA1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
