PI3751-01-LGIZ - 60V 200W ZVS Buck-Boost | Vicor
料号： PI3751-01-LGIZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $26.1 | $261.00 |
| 100 | $23.45 | $2,345.00 |
| 500 | $21.2 | $10,600.00 |
| 1,000 | $19.5 | $19,500.00 |
PI3751-01-LGIZ 概述
A ZVS buck-boost regulator is a non-isolated switching converter that steps an input bus voltage either up or down while maintaining zero-voltage switching across the high-side MOSFET transitions. Within the broader power-conversion hierarchy it sits between the input bus (typically 48 V telecom or 54 V distributed-architecture rails) and downstream point-of-load converters, feeding lower-voltage rails for ASICs, FPGAs and processor cores. The ZVS technique is a resonant soft-switching method that eliminates the capacitive turn-on loss of conventional hard-switched PWM regulators, allowing higher switching frequency, lower EMI and dramatically improved efficiency at elevated input voltages.
The headline features of the PI3751-01-LGIZ include up to 96% peak efficiency, a switching frequency of approximately 1 MHz, sub-millisecond transient response, and a junction-to-ambient thermal resistance suitable for forced-air cooled enclosures. The buck-boost topology permits output voltages both above and below the input rail, which makes the module ideal for systems that operate from loosely regulated 48 V backplanes. Internal protection features include over-current, over-temperature, over-voltage and input under-voltage lockout. The LGIZ surface-mount package exposes the bottom-side power and ground pads for direct PCB attachment, removing the need for through-hole power leads.
Typical applications include 48 V point-of-load conversion for AI accelerator cards, telecom base-station power modules, industrial automation controllers and high-reliability computing boards. When designing with the PI3751-01-LGIZ, follow Vicor's reference PCB layout closely, place input/output ceramic capacitors immediately adjacent to the LGIZ landing pads, and provide adequate copper area for thermal spreading - the module can dissipate tens of watts under full-load buck operation. This page consolidates drop-in alternatives and application patterns that are not contained within the Vicor datasheet alone.
直接替换替代料： PI3751-01-LGIZ ——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： PI3751-01-LGIZ （相同外形与封装尺寸） ——差异在于 Maximum Output Power, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
PI3751-00-LGIZ
✅ 直接替换📋 参考替代料（不在目录中）
PI3751-02-LGIZ
✅ 直接替换✓ 有现货
$45 / 个
查看数据手册 →PI3741-01-LGIZ
✅ 直接替换📋 参考替代料（不在目录中）
PI3741-00-LGIZ
✅ 直接替换📋 参考替代料（不在目录中）
PI3749-00-LGIZ
✅ 直接替换📋 参考替代料（不在目录中）
PI3545-00-LGIZ
✅ 直接替换📋 参考替代料（不在目录中）
PI3751-01-LGIZ 最大额定值与电气特性
| 拓扑 | ZVS Buck-Boost |
| 输入电压范围 | 38 V to 60 V |
| Maximum Output Power | 200 W |
| Peak Efficiency | Up to 96% |
| 开关频率 | ~1 MHz |
| 输出电压范围 | Adjustable (buck-boost) |
| Soft Switching | Zero-Voltage Switching (ZVS) |
| Package Type | LGA System-in-Package (LGIZ) |
| 安装类型 | Surface Mount |
| 工作温度 | -40 C to +125 C |
| Protection Features | OCP, OTP, OVP, UVLO |
| Insulation | Non-isolated |
| RoHS 状态 | Compliant |
| Lead Free | Yes |
PI3751-01-LGIZ lga system-in-package (lgiz) 引脚配置指南
PI3751-01-LGIZ（lga system-in-package (lgiz) 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： PI3751-01-LGIZ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PI3751-01-LGIZ 适用于 7 应用s: 48 V Point-of-Load for AI Accelerator Cards, Telecom Base Station Power Modules, Industrial Automation Controllers, High-Reliability Computing and Server Boards, Battery-Backed 48 V Distributed Architecture, Aerospace and Defense Avionics, LED Driver and High-Brightness Lighting Power.
48 V Point-of-Load for AI Accelerator Cards
The PI3751-01-LGIZ is well matched to 48 V-to-POL rails on AI accelerator cards because it accepts 38 V to 60 V directly from a 48 V backplane and delivers up to 200 W through its ZVS buck-boost topology. According to the Vicor datasheet ds_pi3751.pdf, the ~1 MHz switching frequency shrinks input and output filter inductors and capacitors to a fraction of the size needed for a 300 kHz discrete buck. The integrated LGIZ SiP frees PCB real estate for GPU/HBM placement, while sub-millisecond transient response holds the core rail within tolerance during compute bursts.
推荐
Telecom Base Station Power Modules
In telecom base-station power modules, the PI3751-01-LGIZ directly converts a nominal 48 V bus (38 V to 60 V tolerance per ETSI/NEBS) to the lower voltages needed by digital signal processors and RF front-end ASICs. According to the Vicor datasheet ds_pi3751.pdf, the ZVS architecture lowers EMI emissions compared with hard-switched PWM, easing CE/EMC compliance for outdoor cabinet installations. The 96% peak efficiency reduces dissipated heat, allowing sealed enclosure designs that protect against humidity and dust ingress in cell-tower environments.
推荐
Industrial Automation Controllers
Factory-floor controllers with 48 V or 54 V distributed power benefit from the PI3751-01-LGIZ's 38 V to 60 V input range and 200 W capability. According to the Vicor datasheet ds_pi3751.pdf, integrated OCP/OTP/OVP/UVLO protection reduces the bill of materials and protects PLC backplanes from field-side disturbances such as motor back-EMF. The LGIZ surface-mount package supports automated pick-and-place assembly, lowering production cost for high-volume industrial runs.
推荐
High-Reliability Computing and Server Boards
The PI3751-01-LGIZ suits high-reliability computing and server boards that draw point-of-load power from a 48 V bus to reduce distribution I²R losses. According to the Vicor datasheet ds_pi3751.pdf, the module's non-isolated buck-boost topology lets the output be set either above or below the nominal input, simplifying dual-voltage core/memory rail designs. The integrated SiP eliminates high-frequency power-loop layout risk on the main server PCB, improving MTBF in always-on datacenters.
推荐
Battery-Backed 48 V Distributed Architecture
Battery-backed 48 V distributed-architecture systems - such as UPS-fed IT loads and telecom central offices - require regulators that operate across the battery's discharge curve, typically 42 V to 54 V. The PI3751-01-LGIZ covers this range (38 V to 60 V per the Vicor datasheet ds_pi3751.pdf) with a single conversion stage, avoiding the efficiency penalty of cascaded pre-regulators. Its ZVS switching preserves battery runtime during light loads, which is critical for emergency telecom power.
推荐
Aerospace and Defense Avionics
Aerospace and defense avionics often use 28 V or 48 V nominal buses with wide transients; the PI3751-01-LGIZ's 38 V to 60 V input tolerance is well suited to 48 V avionics rails while its integrated protection features support DO-160 power-quality requirements. According to the Vicor datasheet ds_pi3751.pdf, the LGA SiP package withstands typical aerospace vibration profiles when properly PCB-mounted with underfilled or staked corners. The high switching frequency minimizes the size of input EMI filters - critical for weight-sensitive platforms.
推荐
LED Driver and High-Brightness Lighting Power
High-brightness LED lighting drivers that accept 48 V from constant-current drivers can use the PI3751-01-LGIZ to step the bus down to the LED string voltage with up to 96% efficiency. According to the Vicor datasheet ds_pi3751.pdf, the ZVS switching minimizes acoustic noise and EMI that could interfere with dimming control signals. The 200 W capability supports stadium, horticultural and architectural lighting fixtures where 48 V distribution is preferred for safety and lower cable losses.
推荐
推荐产品汇总
工程参考数据： PI3751-01-LGIZ ——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 | PI3751-00-LGIZ | PI3751-02-LGIZ | PI3741-01-LGIZ | PI3741-00-LGIZ | PI3749-00-LGIZ | PI3545-00-LGIZ |
|---|---|---|---|---|---|---|---|
| Brand | Vicor | Vicor | Vicor | Vicor | Vicor | Vicor | Vicor |
| Package | LGIZ SiP | LGIZ SiP - same | LGIZ SiP - same | LGIZ SiP - same | LGIZ SiP (108-BLGA) - same | LGIZ SiP - same | LGIZ SiP - same |
| Topology | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost | ZVS Buck-Boost |
| Switching Frequency | ~1 MHz | ~1 MHz | ~1 MHz | ~1 MHz | ~1 MHz | ~1 MHz | ~1 MHz |
| Mounting Type | Surface Mount (LGA) | Surface Mount (LGA) | Surface Mount (LGA) | Surface Mount (LGA) | Surface Mount (LGA/BLGA) | Surface Mount (LGA) | Surface Mount (LGA) |
| Pin-to-Pin Compatible | Reference | Yes | Yes | Yes (same family SiP) | Yes (same family SiP) | Yes (same family SiP) | Yes (same family SiP) |
关键差异点
- Highest power in the LGIZ family （对比 PI3741-01-LGIZ)
- ZVS topology eliminates capacitive turn-on loss （对比 Conventional hard-switched buck regulator)
- Integrated SiP shrinks PCB area （对比 Discrete 48V buck-boost using controller + MOSFETs + inductor)
设计说明
Estimated: At 48 V input, 12 V output and 200 W load, the PI3751-01-LGIZ dissipates up to roughly 8 W at 96% efficiency. The LGIZ SiP relies on PCB copper spreading and optional forced-air cooling; provide at least 1 square inch of top-layer copper on the LGIZ landing pads and thermal vias to internal planes. According to the Vicor datasheet ds_pi3751.pdf, junction-to-ambient resistance on a properly laid-out 4-layer PCB is in the range of 12-15 C/W; designers should derate output power if no airflow is available.
Place input and output ceramic capacitors as close as possible to the LGIZ landing pads to minimize high-frequency power-loop parasitic inductance. According to the Vicor datasheet ds_pi3751.pdf, the reference layout uses 4-6 ceramic capacitors in parallel per power node, plus a small bulk electrolytic for hold-up. Maintain continuous return paths under the SiP and avoid signal routing across the power-plane cutouts beneath the LGIZ footprint.
Do not exceed the absolute maximum input voltage of 60 V or apply reverse polarity; the PI3751-01-LGIZ is not isolated, so input transients couple directly to the output. According to the Vicor datasheet ds_pi3751.pdf, an upstream fuse or PTC and a TVS clamp rated for 65 V are recommended on the input. Avoid routing noisy digital signals (clocks, data) directly over the LGIZ pads to prevent capacitive coupling into the sensitive analog feedback loop.
合规信息
RoHS and lead-free compliance per Vicor product page. AEC-Q100 not applicable - this is an industrial/telecom grade part. Halogen-free status not explicitly stated in verified web data.
