TPS543C20RVFR - 40A 14V Sync Step-Down SWIFT Converter | TI
MPN: TPS543C20RVFR ✓ Hoạt độngTPS543C20RVFR Tóm tắt
A buck (step-down) DC-DC switching regulator is a power-management integrated circuit that converts a higher DC input voltage into a lower DC output voltage by rapidly switching an internal MOSFET pair and smoothing the resulting pulsed waveform with an LC output filter. Within the broader power-electronics taxonomy, the TPS543C20 sits in the non-isolated POL (point-of-load) converter family -> DC-DC switching regulator -> voltage regulator -> power-management IC hierarchy. SWIFT converters from TI combine internal MOSFETs, current-mode control, and adaptive compensation to deliver high efficiency at multi-MHz switching frequencies in compact surface-mount footprints.
Key features include integrated 3 mΩ/0.9 mΩ stacked NexFET power stages, differential remote sensing for tight load-point regulation, monolithic integration that eliminates external compensation components, and a stackable architecture that lets two devices operate in parallel for up to 80 A. Internally compensated emulated peak current-mode control provides a wide bandwidth loop, and the switching frequency is synchronizable to an external clock for EMI-sensitive rails. A built-in integrator and ramp-tracking amplifier allow stable operation across the full 0.6 V to 5.5 V output range.
The TPS543C20 architecture uses internal MOSFETs driven by an emulated peak current-mode controller with a clock-synchronizable, fixed-frequency modulator. The internal integrator and directly amplifying ramp tracking loop eliminate the need for external compensation across the wide operating range, simplifying PCB layout and shrinking the BOM. Differential sensing cancels PCB IR-drop in high-current paths, allowing the regulated voltage at the load to remain within ±1% tolerance even at 40 A.
Typical applications include space-constrained point-of-load rails in networking switches and routers, FPGA/ASIC core and transceiver supplies, server and storage POLs, and stacked 80 A configurations for high-current ASIC and processor rails. The 40-pin PowerLFQFN package exposes the die through a thermal pad, allowing multi-layer PCB copper pours to dissipate the heat generated at full load.
When designing with the TPS543C20, observe the datasheet-required minimum input/output capacitor values (including ripple-current-rated ceramics) and keep the SYNC/FSEL loop short to the IC. Differential remote-sense traces must be routed as a matched pair directly to the load to suppress PCB IR-drop in high-current applications.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho TPS543C20RVFR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS543C20RVFR (cùng hình factor và footprint) — khác nhau ở Clock Synchronization, Control Mode, Input Voltage Range, Output Voltage Range, Package.
TPS543C20ARVFR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS543C20RVFT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS543C20ARVFT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS543B20RVFR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS543C20RVFR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS543C20RVFR Tỷ lệ tối đa & tính chất điện
| Cấu trúc | Synchronous Buck (Step-Down) |
| Phạm vi điện áp đầu vào | 4 V to 14 V (A-version: 4 V to 16 V) |
| Khoảng điện áp đầu ra | 0.6 V to 5.5 V |
| Điện áp tối đa đầu ra | 40 A continuous |
| Control Mode | Emulated Peak Current Mode |
| Internal MOSFETs (High-Side / Low-Side) | 3 mΩ / 0.9 mΩ stacked NexFET |
| Kiểu đầu ra | Adjustable (resistor divider) |
| Remote Sensing | Differential (true remote sense) |
| Clock Synchronization | Yes (SYNC input) |
| Compensation | Adaptive Internal (no external comp network) |
| Hộp | 40-Pin PowerLFQFN (RVF) with exposed thermal pad |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +125C junction |
| Trạng thái RoHS | Compliant |
Cấu hình chân TPS543C20RVFR
| Chân 1 | VIN — Input voltage supply |
| Chân 2 | VIN — Input voltage supply |
| Chân 3 | PGND — Power ground |
| Chân 4 | SW — Switching node |
| Chân 5 | SW — Switching node |
| Chân 6 | SW — Switching node |
| Chân 7 | SW — Switching node |
| Chân 8 | PGND — Power ground |
| Chân 9 | BOOT — Bootstrap capacitor for high-side gate drive |
| Chân 10 | VOUT — Output voltage sense |
| Chân 11 | VOUT — Output voltage sense |
| Chân 12 | PGND — Power ground |
| Chân 13 | PGND — Power ground |
| Chân 14 | PGND — Power ground |
| Chân 15 | PGND — Power ground |
| Chân 16 | AGND — Analog ground |
| Chân 17 | DIFF+ — Differential remote sense positive |
| Chân 18 | DIFF- — Differential remote sense negative |
| Chân 19 | FBK — Feedback input |
| Chân 20 | REF — Reference voltage output |
| Chân 21 | EN — Enable input |
| Chân 22 | PGOOD — Power-good indicator output |
| Chân 23 | SYNC — External clock synchronization input |
| Chân 24 | FSEL — Frequency select resistor input |
| Chân 25 | MODE — Mode selection (stack primary/secondary) |
| Chân 26 | PWM/STACK — PWM output / stack interface |
| Chân 27 | TRK — Tracking input |
| Chân 28 | SS — Soft-start capacitor |
| Chân 29 | COMP — Compensation node (internal) |
| Chân 30 | AVIN — Analog input supply |
| Chân 31 | PGND — Power ground |
| Chân 32 | PGND — Power ground |
| Chân 33 | PGND — Power ground |
| Chân 34 | PGND — Power ground |
| Chân 35 | VIN — Input voltage supply |
| Chân 36 | VIN — Input voltage supply |
| Chân 37 | VIN — Input voltage supply |
| Chân 38 | VIN — Input voltage supply |
| Chân 39 | VIN — Input voltage supply |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân EP | PGND_PAD — Exposed thermal pad - power ground |
Ứng dụng tiêu biểu
TPS543C20RVFR phù hợp cho 6 Áp dụngs: FPGA Core and Transceiver POL Supply, Networking Switch and Router ASIC Rails, Server and Storage Point-of-Load Conversion, Stacked 80 A High-Current ASIC Rail, Industrial 24 V to 5 V / 3.3 V Conversion, PCIe Card Auxiliary Power Rails.
FPGA Core and Transceiver POL Supply
The TPS543C20RVFR delivers 0.85 V to 1.8 V rails at up to 40 A directly to high-performance FPGAs (Xilinx Versal, Intel Stratix, etc.). Its 0.6 V to 5.5 V adjustable output covers every common FPGA core and transceiver voltage. Differential remote sensing maintains ±1% regulation at the load by canceling PCB IR-drop in the 40 A power path. Adaptive internal compensation eliminates the comp network that typically clutters dense FPGA power trees, shrinking the POL footprint.
Được đề xuất
Networking Switch and Router ASIC Rails
Routers and top-of-rack switches require multiple 40 A to 80 A rails for switch ASICs and packet processors. The TPS543C20RVFR handles one rail at 40 A, and two devices stack for 80 A on the most demanding ASIC rails. The SYNC input lets multiple TPS543C20 phases lock to a single clock, eliminating beat-frequency noise in dense multi-rail enclosures. The 4 V to 14 V input accepts standard 12 V backplane/connector power directly.
Được đề xuất
Server and Storage Point-of-Load Conversion
Inside hyperscale servers, 12 V main bus power is stepped down at the motherboard to 0.6 V to 3.3 V for CPUs, DDR5, and accelerators. The TPS543C20RVFR fits this POL slot with 95% peak efficiency, programmable frequency, and remote sensing. The 40-pin PowerLFQFN footprint allows high-density placement next to memory DIMMs and M.2 SSDs. Stackable architecture scales to 80 A for accelerator cards without paralleling external MOSFETs.
Được đề xuất
Stacked 80 A High-Current ASIC Rail
Two TPS543C20RVFR devices in a primary-secondary stack deliver 80 A continuous to a single high-current ASIC rail, per the TI reference design. Internal current-sharing loop balances load automatically without external circuitry. This eliminates discrete parallel-FET designs that require complex current-matching networks. Differential sensing on both phases keeps the load-point regulation within ±1% even with 80 A of PCB IR-drop.
Được đề xuất
Industrial 24 V to 5 V / 3.3 V Conversion
The TPS543C20A revision (4 V to 16 V input) tolerates industrial 24 V rails when paired with a TVS/clamp pre-protector. Its 40 A capability drives motor-control, PLC logic, and industrial Ethernet PHYs at 5 V or 3.3 V. The exposed thermal pad of the PowerLFQFN package couples directly to PCB copper for fan-less cooling in sealed enclosures. Differential sensing compensates for long harness drops in distributed control cabinets.
Được đề xuất
PCIe Card Auxiliary Power Rails
PCIe accelerator cards draw auxiliary 12 V from the edge connector and step down to 0.8 V to 1.2 V for the local ASIC. The TPS543C20RVFR fits this application with 40 A capability, 12 V input direct from the slot, and a compact 40-pin PowerLFQFN footprint that fits inside tight add-in-card height envelopes. Programmable soft-start lets the card meet PCIe hot-plug inrush limits without extra hot-swap controllers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS543C20RVFR — 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 | TPS543C20ARVFR | TPS543C20RVFT | TPS543C20ARVFT | TPS543B20RVFR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 40-Pin PowerLFQFN (RVF) | 40-Pin PowerLFQFN (RVF) - same | 40-Pin PowerLFQFN (RVF) - same | 40-Pin PowerLFQFN (RVF) - same | 40-Pin PowerLFQFN (RVF) - same |
| Input Voltage Range | 4 V to 14 V | 4 V to 16 V | 4 V to 14 V | 4 V to 16 V | 4 V to 14 V |
| AEC-Q100 Automotive Qualified | No | No | No | No | No |
| RoHS / Lead-Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Bảo phân biệt quan trọng
- Highest power density in 40-pin PowerLFQFN at 40 A (vsTPS543B20RVFR)
- Wider input voltage range with the A-version (vsTPS543C20RVFR (standard))
- True stackable architecture for 80 A (vsTPS543C20RVFT (single phase))
Ghi chú thiết kế
Estimated: At VIN=12V, VOUT=1.0V, 40A load, the TPS543C20RVFR dissipates approximately 12 V x 40 A x (1 - 0.95) = 24 W (assuming 95% efficiency). The 40-pin PowerLFQFN package couples this heat through its exposed thermal pad to PCB copper. Per TI TPS543C20 datasheet, designers should use a minimum 6-layer board with at least 1 oz copper on inner layers and a 2 oz top layer to keep junction temperature below 125C. A thermal pad land with at least 25 thermal vias into the inner copper pour is mandatory.
Differential remote sense traces (DIFF+ and DIFF-) must be routed as a matched-length, tightly-coupled pair directly from the IC pins to the load sense points, per TI TPS543C20 datasheet layout guidelines. This cancels common-mode noise from the switching node and prevents ground loops. Place the SYNC and FSEL traces away from the SW node to avoid capacitive coupling; if possible, shield them with a ground trace. Keep input/output ceramic capacitors (X7R, ripple-current rated) within 2 mm of the IC pins.
Do not exceed the absolute maximum input voltage of 18 V on the TPS543C20 (14 V version) or 20 V on the TPS543C20A (16 V version) per the TI datasheet. The TPS548D21RVFT is NOT pin-compatible with the TPS543C20 - per the TI E2E forum, switching between them requires redesign of both schematic and PCB layout. When stacking two devices for 80 A, follow the TI TPS543C20 reference design exactly to ensure the primary/secondary current-sharing loop remains stable across all load steps.
Keep the SW (switching) node copper area small to minimize radiated EMI. Use a shielded inductor (semi-toroidal) at the output rather than an open drum core to reduce near-field emissions. The exposed thermal pad (EP) must be soldered to a sufficiently large copper pour (per datasheet minimum) to keep thermal resistance within the spec. Star-ground the analog GND (AGND) returns into the PGND at a single point to avoid ground bounce corrupting the feedback loop.
Thông tin tuân thủ
RoHS compliant and lead-free per TI product page. Halogen-free and full material declaration available via TI MDDS download. Not AEC-Q100 qualified - for automotive designs use the TPS543C20-Q1 variants. For full SVHC REACH declaration see ti.com/product/TPS543C20.
