LTM4643EY#PBF - Quad 3A µModule Regulator | Analog Devices
料号： LTM4643EY#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $28.73 | $28.73 |
| 10 | $26.64 | $266.40 |
| 100 | $24.55 | $2,455.00 |
| 500 | $22.46 | $11,230.00 |
| 1,000 | $20.37 | $20,370.00 |
LTM4643EY#PBF 概述
A µModule regulator is a complete DC-DC converter system-in-package that includes the controller, power stage, inductors, and compensation, offering a high level of integration and ease of use. It belongs to the broader category of power management ICs, specifically switching regulators, and is designed for point-of-load (PoL) applications where space is critical and efficiency is paramount. The LTM4643EY#PBF is part of the LTM4643 series, which is known for its ultrathin profile and high power density.
Key features include a wide input voltage range, configurable output voltage, high efficiency, and the ability to parallel outputs for higher current. The module operates at a switching frequency up to 1.2 MHz, allowing for small external components. It also includes output voltage tracking and sequencing capabilities, making it suitable for complex power supply designs. The BGA-77 package provides excellent thermal performance, with a low thermal resistance that enables operation at high ambient temperatures without derating.
The LTM4643EY#PBF uses a current-mode control architecture, ensuring stable operation over a wide range of load conditions. The integrated inductors and power FETs reduce parasitic losses, contributing to high efficiency across the load range. The module also features overcurrent and overtemperature protection, enhancing system reliability.
Typical applications include power supplies for FPGAs, ASICs, processors, and other digital ICs in networking, telecommunications, industrial, and data center equipment. The quad output configuration is ideal for powering multiple voltage rails from a single module, reducing component count and board area.
When designing with the LTM4643EY#PBF, it is important to consider input and output capacitor selection, as well as thermal management. The module's exposed pad should be connected to a large copper area for heat dissipation. Additionally, the input voltage range and output current requirements must be carefully evaluated to ensure proper operation.
直接替换替代料： LTM4643EY#PBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LTM4643EY#PBF （相同外形与封装尺寸） ——差异在于 Input Voltage Range, Package.
快速对比工具——选择替代料号进行并排对比：
LTM4643IV#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LTM4643MPY
✅ 直接替换📋 参考替代料（不在目录中）
LTM4643EY#PBF
✅ 直接替换✓ 有现货
$20.37 / 个
查看数据手册 →LTM4643IY#PBF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$15.9 / 个
查看数据手册 →LTM4643MPY#PBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTM4643EY#PBF
✅ 直接替换✓ 有现货
$20.37 / 个
查看数据手册 →LTM4643EY#PBF 最大额定值与电气特性
| 输出类型 | Adjustable |
| 输出数量 | 4 |
| 输出电压范围 | 0.6 V to 3.3 V |
| Output Current per Channel | 3 A |
| Total Output Current (Parallel) | 12 A |
| 输入电压范围 | 4 V to 20 V (2.375 V to 20 V with external bias) |
| 开关频率 | 1.2 MHz (max) |
| 封装 | BGA-77 |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40°C to +125°C |
| RoHS 状态 | Compliant |
| Number of Terminals | 77 |
| Package Shape | Rectangular |
| Surface Mount | Yes |
| Temperature Grade | Other |
LTM4643EY#PBF 引脚配置
| 引脚 A1 | VIN — Input supply voltage |
| 引脚 A2 | VOUT1 — Output 1 |
| 引脚 A3 | VOUT2 — Output 2 |
| 引脚 A4 | VOUT3 — Output 3 |
| 引脚 A5 | VOUT4 — Output 4 |
| 引脚 B1 | GND — Ground |
| 引脚 B2 | FB1 — Feedback for output 1 |
| 引脚 B3 | FB2 — Feedback for output 2 |
| 引脚 B4 | FB3 — Feedback for output 3 |
| 引脚 B5 | FB4 — Feedback for output 4 |
| 引脚 C1 | RUN1 — Enable for output 1 |
| 引脚 C2 | RUN2 — Enable for output 2 |
| 引脚 C3 | RUN3 — Enable for output 3 |
| 引脚 C4 | RUN4 — Enable for output 4 |
| 引脚 C5 | PGOOD — Power good indicator |
典型应用
LTM4643EY#PBF 适用于 6 应用s: FPGA Power Supplies, ASIC and Processor Power, Networking Equipment, Industrial Automation, Data Center and Server Power, Telecommunications.
FPGA Power Supplies
The LTM4643EY#PBF provides four independent 3A outputs, ideal for powering FPGA rails such as VCCINT, VCCAUX, and VCCO. Its adjustable output from 0.6V to 3.3V matches common FPGA core and I/O voltages. The high efficiency and integrated inductors reduce heat and board space, enabling compact designs. With a wide input range of 4V to 20V, it can be powered from a 12V intermediate bus. The module's current-mode control ensures stable operation under dynamic loads typical of FPGA operation.
推荐
ASIC and Processor Power
The LTM4643EY#PBF can power ASICs and processors that require multiple low-voltage rails. Its quad outputs can be configured to provide different voltages, such as 1.0V, 1.2V, 1.8V, and 3.3V, from a single module. The high current capability of 3A per output is sufficient for many digital ICs. The module's low profile and small footprint are advantageous in space-constrained designs. Additionally, the ability to parallel outputs allows for higher current if needed, providing design flexibility.
推荐
Networking Equipment
In networking equipment such as switches and routers, the LTM4643EY#PBF provides efficient power conversion for line cards and switch fabrics. Its wide input range accommodates 12V or 24V backplane voltages. The quad outputs can power multiple logic rails, reducing component count and improving reliability. The module's high efficiency minimizes heat generation, which is critical in densely packed networking chassis. The integrated inductors and capacitors simplify PCB layout and reduce electromagnetic interference.
推荐
Industrial Automation
The LTM4643EY#PBF is suitable for industrial automation systems that require robust power supplies. Its input voltage range of 4V to 20V covers common industrial supply rails. The module's wide operating temperature range (-40°C to +125°C) ensures reliable operation in harsh environments. The integrated protection features, such as overcurrent and overtemperature shutdown, enhance system safety. The compact BGA-77 package allows for high-density PCB designs in control cabinets and PLCs.
推荐
Data Center and Server Power
In data centers and servers, the LTM4643EY#PBF provides efficient point-of-load conversion for CPUs, GPUs, and memory. Its quad outputs can power multiple voltage rails, such as Vcore, VCCIO, and VDDQ, from a single module. The high efficiency reduces power loss and cooling requirements, contributing to lower total cost of ownership. The module's ability to parallel outputs allows for scaling to higher currents. The small footprint enables high-density server boards.
推荐
Telecommunications
The LTM4643EY#PBF is ideal for telecommunications equipment, including base stations and optical transport systems. Its wide input range supports 12V or 24V telecom supplies. The quad outputs can power multiple logic and interface rails, simplifying power distribution. The module's high efficiency and low noise are beneficial for sensitive communication circuits. The compact package allows for dense board layouts in rack-mounted equipment.
推荐
推荐产品汇总
工程参考数据： LTM4643EY#PBF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LTM4643IV#PBF | LTM4643MPY | LTM4643IY#PBF |
|---|---|---|---|---|
| Package | BGA-77 | BGA-77 | BGA-77 | BGA-77 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Current per Channel | 3 A | 3 A | 3 A | 3 A |
| 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 3.3V |
| Switching Frequency | 1.2 MHz (max) | 1.2 MHz (max) | 1.2 MHz (max) | 1.2 MHz (max) |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -55°C to +125°C | -40°C to +125°C |
| RoHS | Compliant | Compliant | Non-compliant | Compliant |
关键差异点
- Quad output with 3A per channel （对比 LTM4643IV#PBF)
- Wide input voltage range （对比 LTM4643MPY)
- High switching frequency （对比 LTM4643IY#PBF)
设计说明
The LTM4643EY#PBF in BGA-77 package has an exposed pad that must be soldered to a large copper area for heat dissipation. For high current operation, ensure adequate thermal vias and a copper pour on the PCB to keep the junction temperature within limits. Refer to the datasheet's thermal derating curves.
Place input and output capacitors close to the module pins to minimize parasitic inductance. Use low-ESR ceramic capacitors, typically 10µF to 22µF per output. The datasheet provides recommended capacitor values and layout guidelines for optimal performance.
Ensure the input voltage does not exceed the absolute maximum rating of 20V (or 26V with bias). Also, verify that the output voltage setting resistors are accurate to avoid overvoltage. The RUN pins can be used for sequencing; ensure proper timing to avoid inrush current issues.
合规信息
RoHS compliant per 'PBF' suffix. Other compliance data not specified in provided sources.
