PI3753-50-LGIZ - 50V ZVS Buck-Boost Regulator | Vicor
MPN： PI3753-50-LGIZ ✓ 啟用中PI3753-50-LGIZ 概覽
A ZVS buck-boost regulator is a type of DC-DC switching converter that uses zero-voltage switching to minimize switching losses and electromagnetic interference. It can step the input voltage up or down (buck-boost topology), making it suitable for systems where the input rail varies above and below the required output. Within the broader power converter hierarchy, ZVS buck-boost regulators sit between traditional hard-switched buck converters and isolated DC-DC modules, offering higher efficiency than PWM regulators while supporting bidirectional voltage conversion.
Key features include ZVS switching for high efficiency across the load range, integrated controller + power switches + passive support components, wide input voltage operation, small LGA land-grid-array package for high power density, and minimal external component count. The integrated topology allows designers to achieve power conversion with only input/output capacitors and feedback components external to the module.
The PI3753 architecture uses Vicor's proprietary ZVS topology with adaptive dead-time control, achieving soft-switching across the operating range. This topology reduces switching losses compared to traditional hard-switched buck/boost converters and enables high-frequency operation, which shrinks the required inductor and capacitor energy storage. Integrated power MOSFETs and the controller reduce loop-area parasitics and improve transient response.
Typical applications include distributed power architectures, point-of-load regulation, telecom and networking equipment, industrial automation systems, battery-powered portable devices, and high-density computing platforms. The wide input range makes the part well-suited for 24V industrial buses and 48V telecom rails where the input may vary significantly.
When designing with this part, ensure that the input and output capacitors meet the datasheet ESR and ripple-current ratings; insufficient decoupling can cause instability. Adequate thermal management is also critical - although the module integrates the switches, total power dissipation scales with (VIN - VOUT) * IOUT at low VIN, so thermal copper must be sized accordingly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to help engineers evaluate and apply the PI3753-50-LGIZ quickly.
直接替換替代品，適用於 PI3753-50-LGIZ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
PI3753-00-LGIZ
✅ 直接替換📋 參考替代品（不在目錄中）
PI3749-00-LGIZ
✅ 直接替換📋 參考替代品（不在目錄中）
PI3751-00-LGIZ
✅ 直接替換📋 參考替代品（不在目錄中）
PI3740-00-LGIZ
✅ 直接替換📋 參考替代品（不在目錄中）
PI3753-50-LGIZ 最大額定值與電氣特性
| 拓撲 | ZVS Buck-Boost (non-isolated) |
| 功能 | Step-up / step-down DC-DC switching regulator |
| 輸出電壓 | 50 V (fixed, per -50 suffix) |
| Switching Type | ZVS (zero-voltage switching) |
| Integrated Components | Controller + power switches + support components |
| 輸出類型 | Fixed |
| 輸出數量 | 1 |
| 封裝 / 外殼 | LGA surface-mount module |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant (lead-free per Alibaba listing) |
| Series | Picor PI3753 |
| Manufacturer | Vicor Corporation |
PI3753-50-LGIZ lga surface-mount module 腳位配置指南
PI3753-50-LGIZ（lga surface-mount module 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： PI3753-50-LGIZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
PI3753-50-LGIZ 適用於 6 應用s: Telecom 48 V Point-of-Load Regulation, Industrial 24 V Bus Power Conversion, Distributed Power Architecture (DPA) Intermediate Bus, Battery-Powered Portable Equipment, Test and Measurement Equipment, LED Driver High-Voltage Rails.
Telecom 48 V Point-of-Load Regulation
The PI3753-50-LGIZ steps the 36-72 V telecom bus down to a regulated 50 V intermediate rail for downstream POL converters in line cards. Its ZVS buck-boost topology tolerates input transients during hot-swap and OR-ing events, while the integrated controller and MOSFETs eliminate external switch layout parasitics. With high switching frequency and small footprint, the part fits dense line-card designs where board area is at a premium.
推薦
Industrial 24 V Bus Power Conversion
In 24 V industrial automation systems, the PI3753-50-LGIZ provides a regulated 50 V rail for sensor excitation, motor drivers, or isolation-barrier drivers. The ZVS buck-boost topology allows operation across the 18-36 V industrial input range, while the integrated design reduces component count and BOM cost. Its LGA package supports surface-mount assembly suitable for high-volume industrial manufacturing.
推薦
Distributed Power Architecture (DPA) Intermediate Bus
As an intermediate bus converter stepping 48 V to 50 V for downstream POL regulators, the PI3753-50-LGIZ delivers high efficiency thanks to ZVS switching, reducing total system power loss. The wide input range handles the variable voltage common on DPA buses, and the small LGA footprint allows placing the converter close to the load for better transient response. This topology is preferred in data-center and high-performance computing power trees.
推薦
Battery-Powered Portable Equipment
In battery-discharge applications where the battery voltage can be above or below the required 50 V rail, the PI3753-50-LGIZ buck-boost topology maintains regulation across the entire discharge curve, maximizing usable battery capacity. ZVS switching delivers high efficiency to extend runtime, and the small LGA footprint suits space-constrained portable designs. Integrated switches reduce external parts count for compact assemblies.
推薦
Test and Measurement Equipment
Bench-top and ATE power rails often require precise, low-noise 50 V supplies generated from a wide-range DC source. The PI3753-50-LGIZ's ZVS switching produces low EMI and clean output, while the integrated controller simplifies compliance with measurement-instrument EMI standards. The buck-boost capability accepts bench supplies from 12 V up to 50 V, providing flexibility for lab use.
推薦
LED Driver High-Voltage Rails
High-brightness LED drivers often require a stable 50 V supply for series LED strings. The PI3753-50-LGIZ can accept a variable input source - including battery stacks - and produce a regulated 50 V rail that drives constant-current LED controllers. The ZVS topology's high efficiency reduces thermal stress in enclosed lighting fixtures, and the integrated design simplifies mechanical packaging.
推薦
推薦產品摘要
工程參考資料，適用於 PI3753-50-LGIZ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PI3753-00-LGIZ | PI3749-00-LGIZ | PI3751-00-LGIZ |
|---|---|---|---|---|
| Brand | Vicor | Vicor | Vicor | Vicor |
| Package | LGA surface-mount module | LGA surface-mount module - same | LGA surface-mount module - same | LGA surface-mount module - same |
| Topology | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost |
| Integrated Switches | Yes | Yes | Yes | Yes |
| Series / Family | Picor PI3753 | Picor PI3753 | Picor PI3749 | Picor PI3751 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS / Lead-Free | Yes | Yes | Yes | Yes |
主要差異化特點
- ZVS switching for high efficiency across load range (對比PI3753-00-LGIZ)
- Integrated controller + power MOSFETs + support components (對比Discrete buck-boost designs using TI LM5118 or ADI LT8390)
- Wide input range ZVS buck-boost topology (對比Pure buck or pure boost regulators)
設計說明
Estimated: at 24 V input and 50 V / 1 A output, the PI3753-50-LGIZ's buck-boost topology dissipates roughly (VIN - VOUT) * IOUT + VOUT * IOUT * (1 - efficiency). Although Vicor's ZVS switching keeps efficiency high, continuous operation at maximum load still requires thermal copper pours or external heatsinking. Mount on a minimum 1 square inch of 2 oz copper and ensure airflow if used in enclosed industrial enclosures.
Place input and output ceramic capacitors as close as possible to the LGA power pads to minimize high-frequency loop inductance. The ZVS switching node is sensitive to parasitic inductance; keep input loop area below 0.5 square cm. Use 4-layer PCB with a dedicated ground plane under the module and stitch vias around the LGA perimeter for thermal and EMI performance.
Do not exceed the absolute maximum input voltage specified in the PI3753 datasheet; transient suppression is required on hot-plug 48 V telecom feeds. Avoid using the PI3753-50-LGIZ with output voltages that violate the LGA pad current rating - if higher output current is needed, consider the higher-power Vicor Picor family members. Always verify output ripple with the actual capacitor ESR/ESL combination before finalizing the BOM.
合規資訊
RoHS and lead-free compliance confirmed via Alibaba distributor listing and Vicor's product family policy. Halogen-free status and conflict-mineral declaration require direct inquiry to Vicor. AEC-Q100 not applicable - this is a non-automotive industrial/commercial DC-DC module.
