TPS548B28 - 20A, 16V Synchronous Buck Converter | TI
MPN: TPS548B28 ✓ Hoạt độngTPS548B28 Tóm tắt
A synchronous buck converter (also called a step-down switching regulator) is a DC-DC power management IC that uses integrated high-side and low-side MOSFETs plus an external inductor to convert a higher input voltage to a lower output voltage with high efficiency. Within the power-management hierarchy, the TPS548B28 sits at the point-of-load (POL) regulator level of server, storage, and computing power trees.
Key features include 4-V to 16-V input range up to 20 A without external bias (2.7-V to 16-V with external bias from 3.13 V to 3.6 V), integrated 7.7-mΩ high-side and 2.4-mΩ low-side MOSFETs supporting 20-A continuous output, Skip-mode or FCCM operation for light-load efficiency, and programmable soft start. Differential remote sense improves output accuracy at the load point in dense boards.
Technically, the integrated power stage minimizes external component count, making the part well-suited to space-constrained datacenter applications. Fast load-transient response, accurate load and line regulation, and hiccup-mode overcurrent protection improve system robustness; the internal 3-V LDO simplifies bias by allowing operation directly from the input rail.
Typical applications include server and storage point-of-load rails, networking line cards, and computing ASIC/FPGA/DSP power supplies requiring 20 A or less at 0.6-V to 5.5-V outputs.
Design tip: use the TPS548B28EVM-023 evaluation board as a layout reference, keep the SW loop compact, and note the device is not intended for paralleled outputs - use TPS53355 or LM27403 for parallel designs.
Bộ thay thế dễ dàng lắp đặt cho TPS548B28 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
TPS548B22RWER
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS549B22RWER
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS548B28 Tỷ lệ tối đa & tính chất điện
| Cấu trúc | Synchronous Buck Converter |
| Input Voltage Range (with external bias) | 2.7 V to 16 V |
| Input Voltage Range (no external bias) | 4 V to 16 V |
| External Bias Range | 3.13 V to 3.6 V |
| Khoảng điện áp đầu ra | 0.6 V to 5.5 V |
| Điện áp tối đa đầu ra | 20 A |
| Điện áp tham chiếu | 0.6 V, ±1% over full junction temperature range |
| High-Side MOSFET Rds(on) | 7.7 mOhm |
| Low-Side MOSFET Rds(on) | 2.4 mOhm |
| Light Load Mode | Skip-mode or FCCM selectable |
| Bảo vệ quá dòng | Hiccup current limit |
| Bắt đầu mềm | Programmable |
| Remote Sense | Differential |
| Internal LDO | 3 V internal LDO |
| Hộp | 21-PowerVFQFN (RWW) |
| Kiểu lắp đặt | Surface Mount |
Hướng dẫn cấu hình chân TPS548B28 21-powervfqfn (rww)
Cấu hình chân cho TPS548B28 (21-powervfqfn (rww) gói). Động cơ điện này có chân cổng, nguồn và đầu ra. Đối với các gói không phân極, tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết hướng dẫn chính xác của chân 1 và chi tiết về vân footprint. Các ứng dụng phổ biến bao gồm thiết kế nguồn cung cấp điện, điều khiển động cơ và chuyển đổi tải.
Không có dữ liệu chân cụ thể sẵn có cho TPS548B28.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
TPS548B28 phù hợp cho 6 Áp dụngs: Server Point-of-Load Power, Storage and SSD Systems, Networking and Telecom Line Cards, FPGA and DSP Core Power, Industrial Computing and Edge Systems, Optical Module and ASIC Accelerator Cards.
Server Point-of-Load Power
Server motherboards require tightly regulated low-voltage rails for ASICs, memory, and logic, often at 20 A or less. The TPS548B28 fits this role with its 20-A continuous rating, 0.6-V to 5.5-V adjustable output, and ±1% 0.6-V reference over the full junction temperature range. Its differential remote sense compensates for board IR drop so voltage is accurate at the load pin. With integrated 7.7-mOhm and 2.4-mOhm MOSFETs and a 3-V internal LDO, the external BOM shrinks, fitting the dense layouts typical of server POL design. Fast load-transient response handles step loads from bursty processors.
Được đề xuất
Storage and SSD Systems
Enterprise storage controllers and SSD backplanes need efficient, compact 12-V-to-low-voltage conversion for NAND, controllers, and PHY rails. The TPS548B28 operates from a 4-V to 16-V input without external bias, directly accepting 12-V rails, and delivers up to 20 A with integrated MOSFETs. Skip-mode operation maintains efficiency at light load when storage is idle, while FCCM can be chosen to avoid mode-transient jitter. Hiccup current limit protects against shorted loads, and programmable soft start enables controlled power-up of storage subsystem rails in compliance with typical server startup sequencing requirements.
Được đề xuất
Networking and Telecom Line Cards
Networking line cards distribute a 12-V or intermediate bus to many point-of-load regulators feeding ASICs, PHYs, and optical modules. The TPS548B28's 2.7-V to 16-V input range (with 3.13-V to 3.6-V external bias) covers both 12-V and intermediate-bus inputs. Accurate line and load regulation plus differential remote sense keep rails within tight windows despite card-level voltage drops. Its small footprint and few external components address the high POL density of switch line cards, and Skip-mode operation improves the light-load efficiency that dominates networking energy profiles under partial traffic.
Được đề xuất
FPGA and DSP Core Power
FPGA and DSP core rails often demand sub-1-V outputs at several amps with tight accuracy and fast transient response. The TPS548B28 regulates down to 0.6 V with a ±1% reference over the full junction temperature range, meeting core-voltage accuracy requirements, and its fast load-transient response handles sudden clock-domain load steps during device configuration and operation. The 20-A rating covers mid-size FPGA core loads. Designers should follow the TI EVM-023 layout for compact SW loops to minimize switching transients and ensure stable D-CAP control behavior with low-ESR ceramic output capacitors.
Được đề xuất
Industrial Computing and Edge Systems
Industrial PCs, edge gateways, and embedded controllers run from 12-V or 24-V-adjacent rails and need robust, protected POL conversion. The TPS548B28's hiccup current limit survives sustained short circuits on loads and recovers automatically, improving field reliability. The 4-V to 16-V no-bias input range accepts 12-V industrial rails directly using the internal 3-V LDO, reducing component count in compact enclosures. Its high efficiency from integrated 7.7-mOhm and 2.4-mOhm MOSFETs limits heat dissipation in sealed housings, and programmable soft start coordinates staged power-up of embedded processors and peripherals.
Được đề xuất
Optical Module and ASIC Accelerator Cards
Accelerator cards and optical modules use dense 12-V-to-0.8-V/1.8-V rails with strict height and area limits. The TPS548B28's integrated power stage and minimal external parts reduce solution height and footprint versus discrete designs, while the 20-A capability feeds ASIC or transceiver rails directly. FCCM operation avoids light-load frequency variation that could interact with sensitive analog circuitry on optical front ends, and Skip-mode is selectable for purely digital rails. Designers should place input decoupling close to the VIN pins and reference the TI EVM-023 for validated component selection and layout.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS548B28 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TPS548B22RWER | TPS549B22RWER | TPS53355 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 20 A | ~30 A | ~20-30 A (family variant) | 30 A |
| Input Voltage Range | 2.7 V to 16 V (4-16 V no bias) | 2.7 V to 16 V | 2.7 V to 16 V (family variant) | Split rail: 4.5-13.2 V power stage |
| Output Voltage Range | 0.6 V to 5.5 V | 0.6 V to 5.5 V (family) | 0.6 V to 5.5 V (family) | 0.75 V to 2.775 V |
Bảo phân biệt quan trọng
- Differential remote sense for load-point accuracy (vsTPS548B22RWER)
- No external bias needed from 4-V input (vsTPS53355)
- Integrated MOSFET simplicity vs controller designs (vsLM27403)
Ghi chú thiết kế
Follow the TPS548B28EVM-023 evaluation board layout as the reference design. Keep the high-frequency SW input loop (VIN decoupling capacitors to PGND) as compact as possible to minimize switching-radiated EMI. Place the output inductor and output capacitors close to the SW and VOUT pins, and route the differential remote sense lines as a paired trace away from SW and bootstrap nodes to preserve the ±1% output accuracy at the load.
For 4-V to 16-V inputs, the internal 3-V LDO powers the device directly - no external bias required. For inputs below 4 V, supply an external bias of 3.13 V to 3.6 V. Verify total power dissipation with the integrated 7.7-mOhm high-side and 2.4-mOhm low-side MOSFETs at your load current and ambient temperature; use the exposed pad with a solid ground plane array of thermal vias to conduct heat.
Do not connect TPS548B28 units in parallel for higher current - TI E2E engineers recommend TPS53355 or LM27403 for paralleled-output solutions. Also note that the SW pin (pin 20) switches PWM into the inductor and does not directly carry the 20-A DC output; sizing conductors only at SW misunderstands the current path, which flows through the inductor to the output capacitors.
Thông tin tuân thủ
Compliance details not present in the verified web data; consult the TI product page environmental information for TPS548B28RWWR.
