LTM4643IY#PBF - Quad 3A μModule Regulator | Analog Devices
MPN: LTM4643IY#PBF ✓ Hoạt độngLTM4643IY#PBF Tóm tắt
A µModule regulator is a complete system-in-package (SiP) power management solution that combines a DC-DC controller, power transistors, inductors, and compensation circuitry into a single surface-mount package. This integration eliminates the need for external inductor selection and layout optimization, reducing design risk and time-to-market. The LTM4643 belongs to the µModule regulator family, which is part of the broader DC-DC converter category within power management ICs.
Key features include an input voltage range of 4V to 20V (or 2.375V to 20V with an external bias supply), four independent outputs each adjustable from 0.6V to 3.3V, and a high-efficiency synchronous step-down architecture. The module supports output voltage tracking, remote sense, and parallel operation for higher current. Its ultrathin profile (1.82mm) enables low-profile designs for space-constrained applications.
Technically, the LTM4643 uses a current-mode control architecture with internal compensation, ensuring stable operation across a wide range of output capacitors. The integrated inductors and power FETs are optimized for efficiency and thermal performance. The module includes overcurrent and overtemperature protection, enhancing system reliability. The LGA package provides excellent thermal dissipation through its exposed pad, allowing operation at full load without additional heatsinking in many applications.
Typical applications include FPGA, ASIC, and DSP core power supplies, where multiple low-voltage rails are required. The LTM4643 is also ideal for telecom, networking, and industrial systems that demand high-density, high-efficiency power conversion. Its ability to parallel outputs makes it suitable for high-current rails up to 12A.
When designing with the LTM4643, ensure adequate input and output capacitance as specified in the datasheet. The module's internal compensation simplifies design, but proper PCB layout with a solid ground plane and thermal vias is essential for optimal thermal and electrical performance.
Bộ thay thế dễ dàng lắp đặt cho LTM4643IY#PBF — 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 LTM4643IY#PBF (cùng hình factor và footprint) — khác nhau ở Input Voltage Range, Package.
LTM4643EY#PBF
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTM4643MPV#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTM4644IY#PBF
⚡ Đồng gói ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →LTM4645IY#PBF
⚡ Đồng gói ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTM4620AIY#PBF
⚡ Đồng gói ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTM4643IY#PBF Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Adjustable |
| Số lượng đầu ra | 4 |
| Khoảng điện áp đầu ra | 0.6 V to 3.3 V |
| Output Current per Output | 3 A |
| Maximum Output Current (Parallel) | 12 A |
| Phạm vi điện áp đầu vào | 4 V to 20 V |
| Input Voltage Range (with Bias) | 2.375 V to 20 V |
| Hộp | LGA (16mm x 16mm x 1.82mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +125C |
| Trạng thái RoHS | Compliant |
| REACH Status | Compliant |
| Tính năng | Remote Sense, Output Tracking, Parallel Operation |
Cấu hình chân LTM4643IY#PBF
| Chân 1 | VIN — Input voltage supply |
| Chân 2 | VOUT1 — Output 1 |
| Chân 3 | VOUT2 — Output 2 |
| Chân 4 | VOUT3 — Output 3 |
| Chân 5 | VOUT4 — Output 4 |
| Chân 6 | GND — Ground |
| Chân 7 | RUN1 — Enable for output 1 |
| Chân 8 | RUN2 — Enable for output 2 |
| Chân 9 | RUN3 — Enable for output 3 |
| Chân 10 | RUN4 — Enable for output 4 |
| Chân 11 | PGOOD — Power good indicator |
| Chân 12 | TRACK — Output tracking control |
Ứng dụng tiêu biểu
LTM4643IY#PBF phù hợp cho 6 Áp dụngs: FPGA Core Power Supply, ASIC/DSP Power, Telecom and Networking Equipment, Industrial Automation, Medical Imaging Systems, Data Center and Server Power.
FPGA Core Power Supply
The LTM4643IY#PBF provides four independent 3A rails, ideal for powering FPGA core, I/O, and auxiliary voltages. Its wide input range (4V-20V) accommodates various intermediate bus voltages, and the integrated inductors simplify layout. The module's high efficiency reduces thermal stress in dense FPGA designs, while parallel outputs can deliver up to 12A for high-current cores. The adjustable output range (0.6V-3.3V) matches FPGA core voltages, and remote sense ensures accurate regulation at the point of load.
Được đề xuất
ASIC/DSP Power
ASICs and DSPs often require multiple low-voltage, high-current rails. The LTM4643IY#PBF's four 3A outputs can be paralleled to provide up to 12A for a single rail, or used independently for different voltage domains. Its integrated inductors and FETs reduce component count and design complexity, while the compact LGA package saves board space. The module's high efficiency minimizes power loss, and its thermal performance supports reliable operation in demanding computing environments.
Được đề xuất
Telecom and Networking Equipment
In telecom and networking systems, the LTM4643IY#PBF powers line cards, switches, and routers. Its 4V-20V input range suits standard telecom voltages, and the four outputs can supply different logic levels. The module's high reliability and wide temperature range (-40C to +125C) make it suitable for outdoor and industrial environments. The integrated design reduces EMI and simplifies compliance testing, while the small footprint allows high-density board layouts.
Được đề xuất
Industrial Automation
Industrial automation systems require robust power supplies that can handle wide input variations and harsh conditions. The LTM4643IY#PBF operates from 4V to 20V, covering common industrial bus voltages. Its four outputs can power sensors, actuators, and controllers with different voltage requirements. The module's overcurrent and overtemperature protection enhance system safety, and its compact size allows integration into space-constrained control cabinets.
Được đề xuất
Medical Imaging Systems
Medical imaging equipment such as ultrasound and MRI systems require clean, reliable power for sensitive electronics. The LTM4643IY#PBF's low output noise and high PSRR ensure minimal interference with analog signal chains. Its multiple outputs can power FPGAs, ADCs, and display drivers. The module's small size and high efficiency are beneficial in portable and space-limited medical devices, while its wide temperature range supports reliable operation in clinical environments.
Được đề xuất
Data Center and Server Power
In data centers, the LTM4643IY#PBF provides efficient power conversion for servers and storage systems. Its high efficiency reduces energy consumption and cooling requirements. The module's four outputs can power CPUs, memory, and I/O controllers. The ability to parallel outputs for up to 12A supports high-current rails. The compact LGA package enables high-density power delivery on server motherboards, and the integrated design simplifies thermal management.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTM4643IY#PBF — 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 | LTM4643EY#PBF | LTM4643MPV#PBF | LTM4644IY#PBF |
|---|---|---|---|---|
| Package | LGA (16mm x 16mm x 1.82mm) | LGA (16mm x 16mm x 1.82mm) | LGA (16mm x 16mm x 1.82mm) | LGA (16mm x 16mm x 1.82mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Outputs | 4 | 4 | 4 | 4 |
| Output Current per Output | 3A | 3A | 3A | 4A |
| Maximum Output Current (Parallel) | 12A | 12A | 12A | 16A |
| Input Voltage Range | 4V to 20V | 4V to 20V | 4V to 20V | 4V to 20V |
| Output Voltage Range | 0.6V to 3.3V | 0.6V to 3.3V | 0.6V to 3.3V | 0.6V to 5.5V |
| Temperature Grade | Industrial (-40C to +125C) | Extended (-40C to +125C) | Military (-55C to +125C) | Industrial (-40C to +125C) |
Bảo phân biệt quan trọng
- Integrated inductors and FETs in a compact LGA package (vsDiscrete DC-DC solutions)
- Quad outputs with 3A each, parallelable to 12A (vsLTM4644IY#PBF)
- Industrial temperature grade (-40C to +125C) (vsLTM4643EY#PBF)
Ghi chú thiết kế
For optimal thermal performance, use a multi-layer PCB with a solid ground plane and thermal vias under the LTM4643's exposed pad. The datasheet recommends a minimum of 4 layers with 2oz copper for high-current applications. Ensure adequate copper area for heat spreading to keep the junction temperature within limits.
Select input and output capacitors according to the datasheet guidelines. Typically, use 100uF ceramic capacitors for input and 100uF for each output. The module's internal compensation allows stable operation with a wide range of output capacitors, but following the recommended values ensures optimal transient response.
When paralleling outputs for higher current, ensure all outputs are connected together and use the TRACK pin for proper current sharing. Do not exceed the maximum input voltage of 20V. Also, verify that the total power dissipation does not exceed the module's thermal rating; use the efficiency curves in the datasheet to estimate losses.
Thông tin tuân thủ
RoHS and REACH compliant per distributor data. Not AEC-Q100 qualified as it is not an automotive-grade part.
