TDA38827AUMA1 - 25A OptiMOS IPOL Buck Regulator | Infineon
MPN： TDA38827AUMA1 ✓ 啟用中TDA38827AUMA1 概覽
A buck regulator is a switch-mode DC-DC converter that steps a higher input voltage down to a lower regulated output voltage with high efficiency. Within the power management hierarchy, a buck converter belongs to the broader family of switching regulators, which sit alongside linear regulators (LDOs) and charge pumps in the DC-DC converter category. Integrated POL (point-of-load) regulators such as the TDA38827 incorporate the controller, FETs, and often bootstrap drive into one IC, eliminating external MOSFETs and shrinking board area versus discrete buck designs.
Key specifications include 25 A continuous output current, 0.6 V minimum adjustable output, constant on-time (COT) control for fast transient response, and integrated OptiMOS 5 FETs with built-in bootstrap diode. The COT architecture provides pseudo-fixed switching frequency, near-unity duty ratio operation at heavy load, and inherently stable output without external compensation network. The 22-pin PowerVQFN package (PG-IQFN-22) exposes a thermal pad that conducts heat from the integrated MOSFETs to the PCB copper pour.
Typical applications include server and datacom POL rails, telecom card voltage rails, distributed bus converters in storage and networking hardware, FPGA/DSP core and I/O supplies, and high-current ASIC power delivery. The combination of 25 A capability and a compact package suits space-constrained boards where designers need high current density and reduced BOM count.
When designing with this part, follow Infineon's recommended input/output capacitor values and observe the thermal pad layout guidelines. The COT control scheme depends on the output ripple for stable switching, so external ripple injection or a low-ESR output capacitor network may be required in some configurations.
直接替換替代品，適用於 TDA38827AUMA1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TDA38827AUMA1 （相同外形與佔位） — 差異在於 Package.
TDA38826XUMA1
✅ 直接替換聯絡詢價
查看資料表 →TDA38827
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TDA38827AUMA1 最大額定值與電氣特性
| 拓撲 | Synchronous Buck (Step-Down) |
| 輸出類型 | Adjustable |
| Minimum Output Voltage | 0.6 V |
| 輸出數量 | 1 |
| 最大輸出電流 | 25 A |
| Control Scheme | Constant On-Time (COT) |
| Integrated Power Stage | OptiMOS 5 MOSFETs with integrated bootstrap diode |
| 封裝 | 22-PowerVQFN (PG-IQFN-22) |
| 安裝類型 | Surface Mount |
| Switching Behavior | PWM, constant on-time |
| 功能 | Integrated Point-of-Load (POL) DC-DC Buck Regulator |
| Product Family | OptiMOS IPOL |
| RoHS 狀態 | Compliant |
TDA38827AUMA1 腳位配置
| 腳位 1 | VIN — Input supply voltage |
| 腳位 2 | VIN — Input supply voltage |
| 腳位 3 | PGND — Power ground |
| 腳位 4 | PGND — Power ground |
| 腳位 5 | SW — Switch node (phase output to inductor) |
| 腳位 6 | SW — Switch node (phase output to inductor) |
| 腳位 7 | VCC — Internal regulator output / bootstrap supply |
| 腳位 8 | BOOT — Bootstrap pin for high-side gate drive |
| 腳位 9 | VOUT — Output voltage sense / return path |
| 腳位 10 | FB — Feedback (to external resistor divider) |
| 腳位 11 | EN — Enable input |
| 腳位 12 | AGND — Analog ground |
| 腳位 13 | NC — Not connected (per datasheet) |
| 腳位 14 | NC — Not connected (per datasheet) |
| 腳位 15 | NC — Not connected (per datasheet) |
| 腳位 16 | NC — Not connected (per datasheet) |
| 腳位 17 | PGND — Power ground |
| 腳位 18 | PGND — Power ground |
| 腳位 19 | VIN — Input supply voltage |
| 腳位 20 | VIN — Input supply voltage |
| 腳位 21 | PGND — Power ground |
| 腳位 22 | PGND — Power ground |
典型應用
TDA38827AUMA1 適用於 6 應用s: Server and Datacom Point-of-Load Rails, Telecom Card Voltage Rails, FPGA Core and I/O Voltage Supplies, High-Current ASIC Power Delivery, Industrial Distributed Bus Conversion, Storage Controller Board Power.
Server and Datacom Point-of-Load Rails
The TDA38827AUMA1's 25 A continuous output and integrated OptiMOS 5 power stage make it well-suited for high-current POL rails on server motherboards, where it typically delivers 1.0 V to 1.8 V to ASIC and memory loads from a 12 V intermediate bus. Its constant on-time control scheme provides sub-microsecond transient response to sudden load steps from CPUs and switch fabrics, while the 22-pin PowerVQFN footprint reduces board area versus discrete controller-plus-FET solutions.
推薦
Telecom Card Voltage Rails
In telecom line cards and baseband units, the TDA38827AUMA1 powers high-current DSP and FPGA cores directly from the 12 V or 5 V distribution bus. The integrated bootstrap diode and OptiMOS 5 FETs remove the need for an external high-side driver, cutting BOM count by several parts per rail. The COT control inherently adapts the on-time to input voltage variation, which is helpful on telecom boards that experience bus transients during hot-swap events.
推薦
FPGA Core and I/O Voltage Supplies
The TDA38827AUMA1's adjustable output down to 0.6 V matches the core voltage of most modern FPGAs and SoCs, while its 25 A capability can supply even large FPGA core rails from a single chip. Designers can use one TDA38827AUMA1 per core rail and a second for the I/O voltage, simplifying multi-rail sequencing. The fast transient response of the COT loop keeps Vcore within tolerance during logic-block switching surges that occur at every clock edge.
推薦
High-Current ASIC Power Delivery
Networking ASICs and switch-fabric chips often demand 15-25 A at sub-1 V rails, exactly the operating envelope of the TDA38827AUMA1. The integrated power stage keeps the high-current switching loop small, which reduces parasitic inductance and limits voltage overshoot at the load. Using the TDA38827AUMA1 instead of a discrete buck halves the number of power components on the bill of materials and simplifies thermal design.
推薦
Industrial Distributed Bus Conversion
In industrial 24 V or 12 V distributed bus systems, the TDA38827AUMA1 serves as the local POL converter stepping down to logic-level rails for motor controllers, PLCs, and I/O modules. Its PowerVQFN exposed thermal pad couples directly to inner-layer copper planes, which is important when the converter sits inside a sealed enclosure with limited airflow. The COT scheme also tolerates the wide input voltage variation typical of industrial DC buses.
推薦
Storage Controller Board Power
Enterprise SSD and HDD controller boards require tightly regulated 1.0 V to 3.3 V rails for the main storage controller, DRAM, and NAND interface. The TDA38827AUMA1's 25 A rating and small footprint suit the dense layout of NVMe controller cards, while its high efficiency from integrated OptiMOS 5 FETs keeps thermal rise low even at full load. Multiple TDA38827AUMA1 devices can be paralleled or assigned to different rails on the same controller board.
推薦
推薦產品摘要
工程參考資料，適用於 TDA38827AUMA1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TDA38826XUMA1 |
|---|---|---|
| Package | 22-PowerVQFN (PG-IQFN-22) | 22-PowerVQFN (PG-IQFN-22) |
| Brand | Infineon | Infineon |
| Maximum Output Current | 25 A | 12-15 A |
| Control Scheme | Constant On-Time (COT) | Constant On-Time (COT) |
| Integrated MOSFETs | OptiMOS 5 (HS + LS) | OptiMOS 5 (HS + LS) |
| Integrated Bootstrap Diode | Yes | Yes |
| Drop-in Replacement | — | Lower current only |
主要差異化特點
- 25 A in a single integrated power stage (對比TDA38826XUMA1)
- OptiMOS 5 FETs integrated with bootstrap diode (對比Discrete controller + external FETs)
- COT control without external compensation (對比Voltage-mode controllers with compensation network)
設計說明
The 22-pin PowerVQFN package relies on the exposed thermal pad to conduct heat from the integrated OptiMOS 5 FETs into the PCB copper. Use at least 4 thermal vias in the pad, stitch the inner copper layers with copper pours, and place the input ceramic capacitors directly above the high-current VIN/PGND pairs to minimize loop resistance and improve heat spreading. Estimated: at 12 V to 1.0 V and 25 A, efficiency is approximately 90-92%, leading to roughly 2-3 W of dissipation that must be sunk through the PCB.
Place the input ceramic capacitors as close as possible to the VIN and PGND pins, with the high-side FET loop area (VIN — HS-FET — SW — LS-FET — PGND) kept to a minimum. The SW node to inductor connection should be wide and short. The exposed thermal pad must be soldered to a copper plane of at least 1 oz copper for adequate thermal performance. Recommended footprint dimensions are provided in the Infineon OptiMOS IPOL land pattern.
The COT control scheme requires sufficient output ripple at the feedback node to set a stable switching frequency. With all-ceramic low-ESR output capacitors, an external ripple injection network (feedforward from VOUT or SW) may be required — omitting it can cause sub-harmonic instability. Always verify the design with the Infineon reference design BOM and follow the recommended inductor and output capacitor values.
合規資訊
RoHS and REACH compliance per Infineon product page. AEC-Q100 not applicable — this is an industrial/commercial OptiMOS IPOL regulator, not an automotive-qualified part.
