RHP50000 - 12.5A Silent Switcher 2 Step-Down | Analog Devices
料号： RHP50000 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.5 | $5,500.00 |
RHP50000 概述
A step-down DC/DC converter, also known as a buck converter, is a type of switching regulator that efficiently converts a higher input voltage to a lower output voltage. Unlike linear regulators, which dissipate excess power as heat, buck converters use switching elements and energy storage components to achieve high efficiency, especially when the input-to-output voltage difference is large. The RHP50000 is a synchronous buck converter, meaning it uses two MOSFETs (high-side and low-side) to minimize conduction losses and eliminate the need for an external Schottky diode. This architecture is fundamental to modern power management ICs, enabling compact, high-current power solutions for processors, FPGAs, and other digital loads.
Key features of the RHP50000 include its 12.5A output current capability, 2.25V to 5.5V input voltage range, and adjustable output voltage down to 0.5V. The Silent Switcher 2 architecture integrates bypass capacitors to reduce EMI, simplifying PCB layout and reducing the need for external filtering. The device operates at switching frequencies up to 5MHz, allowing the use of small inductors and capacitors, which reduces solution footprint. It also features a precision enable pin, soft-start, and power-good output for reliable power sequencing.
Technically, the RHP50000 uses a current-mode control architecture with internal compensation, providing fast transient response and stable operation over a wide range of output capacitors. The integrated hot loop bypass capacitors minimize parasitic inductance in the switching loops, which is critical for achieving low EMI at high frequencies. The device also includes overcurrent protection, thermal shutdown, and undervoltage lockout to ensure robust operation in harsh environments.
Typical applications include powering FPGAs, ASICs, and processors in commercial space systems, as well as high-current point-of-load (POL) converters in networking, telecommunications, and industrial equipment. The wide input range and high output current make it ideal for 5V or 3.3V rails that need to step down to core voltages like 1.2V or 0.9V.
When designing with the RHP50000, pay careful attention to the input and output capacitor placement to minimize parasitic inductance. The AGND pin should be connected to the negative terminal of the output capacitor at the load for good load regulation. Use a solid ground plane and follow the layout guidelines in the datasheet to achieve the best EMI performance.
直接替换替代料： RHP50000 ——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：
LTC3310S
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
RHP50000 最大额定值与电气特性
| 输出类型 | Adjustable |
| 最大输出电流 | 12.5A |
| 输入电压范围 | 2.25V to 5.5V |
| 开关频率 | Up to 5MHz |
| Architecture | Silent Switcher 2 |
| 同步整流 | Yes |
| 封装 | 18-TFQFN Exposed Pad |
| 安装类型 | Surface Mount |
| 使能引脚 | Yes |
| 软启动 | Yes |
| Power Good | Yes |
| RoHS 状态 | Compliant |
| EMI Reduction | Integrated hot loop bypass capacitors |
RHP50000 引脚配置
| 引脚 1 | VIN — Input supply voltage |
| 引脚 2 | VIN — Input supply voltage |
| 引脚 3 | SW — Switch node |
| 引脚 4 | SW — Switch node |
| 引脚 5 | GND — Power ground |
| 引脚 6 | GND — Power ground |
| 引脚 7 | VOUT — Output voltage sense |
| 引脚 8 | VOUT — Output voltage sense |
| 引脚 9 | AGND — Analog ground |
| 引脚 10 | EN — Enable pin |
| 引脚 11 | SS — Soft-start programming |
| 引脚 12 | PG — Power good output |
| 引脚 13 | FB — Feedback pin |
| 引脚 14 | COMP — Compensation pin |
| 引脚 15 | RT — Switching frequency programming |
| 引脚 16 | SYNC — External clock synchronization |
| 引脚 17 | MODE — Mode selection |
| 引脚 18 | GND — Exposed pad, ground |
典型应用
RHP50000 适用于 6 应用s: FPGA Power Supply, ASIC Power Supply, Point-of-Load (POL) Converter, Networking Equipment, Commercial Space Systems, Telecom Infrastructure.
FPGA Power Supply
The RHP50000 provides a high-current, low-voltage rail for FPGAs, such as Xilinx UltraScale+ devices. Its 12.5A output and adjustable voltage down to 0.5V make it ideal for core and auxiliary rails. The Silent Switcher 2 architecture minimizes EMI, which is critical in dense digital systems. With switching frequencies up to 5MHz, it allows for small external components, saving board space. The device's fast transient response ensures stable operation during dynamic load changes, which is common in FPGA applications. Its enable and power-good features facilitate power sequencing, ensuring reliable startup and shutdown. The wide input range (2.25V to 5.5V) allows it to be powered from 3.3V or 5V intermediate buses. Overall, the RHP50000 simplifies the power design for high-performance FPGAs, reducing both size and EMI.
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ASIC Power Supply
ASICs often require precise, high-current power rails with low noise. The RHP50000 delivers up to 12.5A with an adjustable output down to 0.5V, making it suitable for powering the core of custom ASICs. Its high switching frequency (up to 5MHz) enables the use of small inductors and capacitors, reducing the overall solution size. The Silent Switcher 2 architecture ensures low EMI, which is essential for maintaining signal integrity in mixed-signal systems. The device's fast transient response helps maintain voltage regulation during sudden load changes, which is common in ASIC operation. The integrated protection features, such as overcurrent and thermal shutdown, enhance system reliability. The enable pin allows for controlled power-up sequencing, which is critical for ASICs with multiple power domains. Overall, the RHP50000 provides a compact, efficient, and low-noise power solution for ASIC applications.
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Point-of-Load (POL) Converter
The RHP50000 is an excellent choice for point-of-load (POL) converters in networking, telecom, and industrial equipment. It can step down a 5V or 3.3V rail to a lower voltage, such as 1.2V or 0.9V, with high efficiency. Its 12.5A output current is sufficient for powering multiple loads or a single high-current load. The high switching frequency (up to 5MHz) allows for a compact design, which is beneficial in space-constrained applications. The Silent Switcher 2 architecture reduces EMI, making it easier to pass EMC testing. The device's adjustable output voltage and enable pin provide flexibility in power sequencing. The integrated soft-start prevents inrush current, protecting the input supply. With its wide input range and robust protection features, the RHP50000 is a reliable POL solution for various industrial applications.
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Networking Equipment
In networking equipment such as routers and switches, high-current, low-voltage rails are needed for processors and ASICs. The RHP50000 provides up to 12.5A with low EMI, which is crucial for maintaining signal integrity in high-speed data paths. Its high switching frequency (up to 5MHz) allows for small external components, saving board space in dense line cards. The device's fast transient response ensures stable operation during bursty network traffic. The enable and power-good features enable proper power sequencing in multi-rail systems. The wide input range (2.25V to 5.5V) allows it to be powered from standard 3.3V or 5V rails. The Silent Switcher 2 architecture simplifies PCB layout, reducing design time and cost. Overall, the RHP50000 is an ideal power solution for networking equipment, offering high performance and reliability.
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Commercial Space Systems
The RHP50000 is specifically designed for commercial space applications, where high efficiency and low EMI are critical. It can deliver up to 12.5A from a 2.25V to 5.5V input, making it suitable for powering FPGAs and processors in satellites and space probes. The Silent Switcher 2 architecture minimizes EMI, which is important for sensitive scientific instruments. The device's high switching frequency (up to 5MHz) allows for small external components, reducing weight and size, which are critical in space missions. The wide input range accommodates varying bus voltages. The device's robust protection features, including overcurrent and thermal shutdown, ensure reliable operation in harsh environments. The enable pin allows for controlled power sequencing, which is essential for complex space systems. Overall, the RHP50000 is a trusted power solution for commercial space applications.
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Telecom Infrastructure
In telecom infrastructure, such as base stations and servers, high-current, low-voltage rails are required for processors and FPGAs. The RHP50000 provides up to 12.5A with high efficiency, reducing power dissipation and cooling requirements. Its high switching frequency (up to 5MHz) allows for small inductors and capacitors, saving board space. The Silent Switcher 2 architecture ensures low EMI, which is important for co-located RF circuits. The device's fast transient response helps maintain voltage stability during load changes. The enable and power-good features enable proper power sequencing in multi-rail systems. The wide input range (2.25V to 5.5V) allows it to be powered from standard telecom rails. The device's robust protection features enhance system reliability. Overall, the RHP50000 is an excellent choice for telecom power supplies, offering high performance and compactness.
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推荐产品汇总
工程参考数据： RHP50000 ——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 | LTC3310S | LTM8065 | TPS546C23 |
|---|---|---|---|---|
| Package | 18-TFQFN | 18-TFQFN | BGA | VQFN-40 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Output Current | 12.5A | 12.5A | 5A | 35A |
| Input Voltage Range | 2.25V to 5.5V | 2.25V to 5.5V | 4V to 20V | 4.5V to 16V |
| Switching Frequency | Up to 5MHz | Up to 5MHz | Up to 2.4MHz | Up to 2MHz |
| EMI Reduction | Silent Switcher 2 | Silent Switcher 2 | Shielded module | Standard |
| Pin Compatibility | Reference | Likely compatible | No | No |
关键差异点
- 12.5A output current in a small 18-TFQFN package （对比 LTM8065)
- Silent Switcher 2 architecture for low EMI （对比 TPS546C23)
- High switching frequency up to 5MHz （对比 LTM8065)
设计说明
For optimal EMI performance, place the input and output capacitors as close as possible to the VIN and VOUT pins. The Silent Switcher 2 architecture integrates hot loop bypass capacitors, but external capacitors are still required. Use a solid ground plane and minimize the loop area of the switching node. Follow the layout guidelines in the datasheet to achieve the best results.
The RHP50000 can dissipate significant power at high output currents. Ensure adequate thermal management by using the exposed pad connected to a large copper area on the PCB. The thermal resistance of the 18-TFQFN package is [DATA_NEEDED: thermal resistance]. For 12.5A output, calculate the power dissipation and ensure the junction temperature stays within limits.
Connect the AGND pin to the negative terminal of the output capacitor at the load to achieve good load regulation. Do not route the feedback trace near the switch node to avoid noise coupling. Use a proper compensation network as specified in the datasheet. Ensure the input voltage does not exceed the absolute maximum rating of 5.5V.
合规信息
RoHS compliance is indicated by the DigiKey listing. Other compliance information is not explicitly stated in the provided data.
