PI3755-02-LGIG - 38-60V 160W ZVS Buck-Boost Regulator | Vicor
料号： PI3755-02-LGIG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $78.5 | $78.50 |
| 10 | $72.3 | $723.00 |
| 100 | $65.1 | $6,510.00 |
| 500 | $58.4 | $29,200.00 |
| 1,000 | $52.75 | $52,750.00 |
PI3755-02-LGIG 概述
A ZVS Buck-Boost regulator is a member of the switched-mode power supply (SMPS) family that combines the topology of a synchronous buck (step-down) and synchronous boost (step-up) converter so the output voltage can sit above, below, or equal to the input without topology change. In the system hierarchy this part sits between a discrete DC-DC converter and a fully-integrated power module: it is fully self-contained, requiring only input/output capacitors and a feedback resistor divider, while still presenting the electrical interface of a switching regulator IC to the host PCB. Vicor's proprietary ZVS topology eliminates the hard-switching losses that limit conventional hard-switched converters at high frequency, enabling high efficiency across the 38-60 V telecom/datacom input range.
Key features include 1.5 MHz switching frequency, an adjustable output up to 54 V, integrated MOSFET power stage, and built-in protection for over-current, over-temperature, and input under-voltage. The ZVS topology achieves best-in-class power efficiency for point-of-load applications and dramatically reduces switching-noise EMI compared to hard-switched alternatives. The Cool-Power LGA package provides a low-profile, surface-mount footprint compatible with standard reflow processes.
Typical applications include 48 V telecom point-of-load regulation, distributed power architectures, industrial 48 V bus systems, LED signage and display drivers, and high-current downstream POL conversion from a 48 V or 54 V backplane. The wide input range makes it particularly suitable for nominal 48 V systems with tolerance excursions up to 60 V.
When designing with this part, observe Vicor's recommended input capacitor ESR and PCB layout guidelines to maintain ZVS operation; poor layout can defeat the soft-switching benefit and degrade efficiency. Thermal design must account for the 10x10 mm LGA land pattern and any required thermal vias to internal copper pours.
This page synthesizes distributor pricing, parametric drop-in alternatives from the Vicor Cool-Power family, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： PI3755-02-LGIG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
PI3755-02-LGIZ
✅ 直接替换📋 参考替代料（不在目录中）
PI3755-02-LGIZR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PI3741-02-LGIG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PI3740-02-LGIG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PI3755-00-LGIG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PI3755-02-LGIG 最大额定值与电气特性
| 拓扑 | ZVS Buck-Boost (synchronous) |
| 输入电压范围 | 38 V to 60 V |
| 输出电压范围 | 28 V (min fixed) to 54 V (max adjustable) |
| Output Power | 160 W |
| 开关频率 | 1.5 MHz |
| 输出类型 | Adjustable, positive |
| 输出数量 | 1 |
| Switching Topology | Zero-Voltage Switching (ZVS) |
| 封装 | 71-ball LGA (10x10 mm) Cool-Power module |
| 安装类型 | Surface Mount |
| Grade Suffix | LGIG (industrial grade) |
| 工作温度 | -40 °C to 125 °C |
| Integrated Components | Controller, power switches, support components |
| RoHS 状态 | Compliant |
PI3755-02-LGIG 71-ball lga (10x10 mm) cool-power module 引脚配置指南
PI3755-02-LGIG（71-ball lga (10x10 mm) cool-power module 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： PI3755-02-LGIG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PI3755-02-LGIG 适用于 6 应用s: 48 V Telecom Point-of-Load Regulation, Distributed Power Architectures, Industrial 48 V Bus Systems, LED Signage and Display Drivers, High-Current FPGA / ASIC Core Rails, Battery Charging Intermediate Rails.
48 V Telecom Point-of-Load Regulation
The PI3755-02-LGIG is purpose-built for 48 V telecom point-of-load conversion. Its 38-60 V input directly accepts the nominal 48 V backplane plus transient excursions to 60 V specified by typical telecom rectifier standards, while the adjustable 28-54 V output cleanly feeds downstream POL converters, ASIC core rails, and DSP supplies. The 160 W output capacity covers many high-current 48 V-to-lower-voltage rails in a single module. ZVS switching at 1.5 MHz keeps EMI low enough to meet telecom PCB-noise budgets without exotic shielding, while peak efficiency in the high-90s at typical loads minimizes thermal stress in densely populated line cards.
推荐
Distributed Power Architectures
In a distributed power architecture (DPA) the front-end converter delivers an intermediate 48 V bus, and intermediate-bus converters (IBCs) such as the PI3755-02-LGIG step this bus down to a local rail near the load. The 160 W rating covers an entire ASIC + memory + supporting circuitry load zone on a single board. Cool-Power LGA packaging reduces board area versus discrete buck/boost implementations, freeing PCB real estate for signal routing. Designers benefit from the integrated controller and power stage - no compensation network, no gate-drive layout, and no proprietary ZVS magnetics to source separately. As of 2026-10-14 the PI3755-02-LGIG is a current active part for new DPA designs at major OEMs.
推荐
Industrial 48 V Bus Systems
Industrial 48 V bus systems in factory automation, robotics, and heavy equipment use 38-60 V battery or distribution rails that the PI3755-02-LGIG accepts directly. The -40 °C to 125 °C industrial operating temperature range matches the harsh environments of these applications. ZVS switching reduces conducted and radiated EMI, easing compliance with industrial EMC standards such as EN 61000-6-2. The wide adjustable 28-54 V output range covers motor-drive auxiliary rails, sensor excitation supplies, and 48 V battery-charging intermediate rails from a single part number.
推荐
LED Signage and Display Drivers
Large-format LED signage and high-brightness display backplanes often run on 48 V distribution and require regulated intermediate rails to drive LED driver ICs and constant-current stages. The PI3755-02-LGIG delivers up to 54 V from a 48 V input in Buck-Boost mode, supporting designs where the LED forward voltage may exceed the bus voltage at low duty. The 1.5 MHz switching frequency keeps the output ripple below visible flicker thresholds when used as a display backplane rail, and the 160 W capacity drives multiple parallel LED driver strings from a single converter.
推荐
High-Current FPGA / ASIC Core Rails
Modern FPGA and ASIC core voltages typically require 0.7-1.0 V at 50-100+ A, generated by a chain of buck converters fed from an intermediate 48 V or 54 V rail. The PI3755-02-LGIG provides that intermediate rail at 160 W with high efficiency, dramatically shrinking the front-end compared with running a 48 V-to-12 V brick followed by a 12 V-to-core multi-phase buck. ZVS switching minimizes input-ripple noise that could couple into sensitive SerDes and analog PLL supplies on the same PCB.
推荐
Battery Charging Intermediate Rails
48 V battery systems in telecom backup, e-mobility, and energy storage require charging rails that can both source current into the battery and accept current back during regenerative operation. The PI3755-02-LGIG's Buck-Boost capability lets the output sit above, below, or equal to the input, supporting bidirectional-style charging topologies with a single-stage converter. The 54 V upper output limit covers common 48 V battery float voltages with margin, and the 28 V minimum fixed output supports lower-voltage charging profiles during bulk-charge phases.
推荐
推荐产品汇总
工程参考数据： PI3755-02-LGIG ——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 | PI3755-02-LGIZ | PI3755-02-LGIZR | PI3741-02-LGIG | PI3740-02-LGIG | PI3755-00-LGIG |
|---|---|---|---|---|---|---|
| Brand | Vicor | Vicor | Vicor | Vicor | Vicor | Vicor |
| Package | 71-LGA (10x10 mm) | 71-LGA (10x10 mm) - same | 71-LGA (10x10 mm) - same | 71-LGA (10x10 mm) - same | 71-LGA (10x10 mm) - same | 71-LGA (10x10 mm) - same |
| Topology | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck (step-down only) | ZVS Buck (step-down only) | ZVS Buck-Boost (predecessor) |
| Input Voltage Range | 38 V to 60 V | 38 V to 60 V | 38 V to 60 V | 38 V to 60 V | 38 V to 60 V | 38 V to 60 V |
| Grade Suffix | LGIG (industrial) | LGIZ | LGIZR (tape & reel) | LGIG | LGIG | LGIG |
关键差异点
- ZVS Buck-Boost topology in a single integrated module （对比 PI3741-02-LGIG (Buck-only))
- High power density in 10x10 mm Cool-Power LGA （对比 PI3755-02-LGIZ)
- 1.5 MHz switching enables compact output filter （对比 PI3755-00-LGIG (predecessor series))
设计说明
Follow the Vicor-recommended PCB land pattern and thermal-via array exactly as drawn in the ds_PI3755-02 datasheet mechanical section. The LGA package relies on a precise solder-paste stencil and uniform thermal via placement to maintain ZVS operation. Deviations from the recommended layout can increase loop inductance, causing the controller to exit ZVS and degrade efficiency. Estimated: deviations of even 2-3 nH in the input loop can shift the ZVS boundary upward in load current at 1.5 MHz.
At 160 W full load with peak efficiency in the high-90s, dissipation can reach 5-10 W. Use the datasheet thermal-via pattern under the LGA footprint tied to multiple inner copper planes. Estimated: with the recommended 4-layer thermal via array, theta_JA is in the 10-15 C/W range, so 8 W dissipation yields roughly 100 C rise above ambient - acceptable at 125 C max junction only with adequate airflow or thermal relief. De-rate output power at elevated ambient temperatures.
Do not substitute generic 48 V buck-boost ICs for the PI3755-02-LGIG on the same PCB footprint - the 71-ball LGA pinout is Vicor-proprietary and is not industry-standardized. Also avoid using input capacitors with too-high ESR; the ZVS soft-switching assumes a low-impedance input bus. The TRIM resistor divider must use 1% tolerance resistors to maintain output set-point accuracy within datasheet limits.
合规信息
RoHS and lead-free confirmed per Vicor product page. AEC-Q100 not applicable (industrial/telecom, not automotive).
