概览
描述
The ISL73847M is a synchronous buck controller that can operate as a single or dual-phase controller. It works with the ISL71441M (half-bridge GaN FET driver) to generate point-of-load voltage rails for commercial space applications.
It accepts an input voltage range of 4.5V to 19V with a programmable PWM output switching frequency between 250kHz and 1.5MHz with a single resistor. The output can regulate a voltage upwards of 600mV and is limited on the top end by the minimum off time and selected switching frequency.
The ISL73847M features built-in current sharing, enabling two-phase operation within a single device and four-phase operation using two ISL73847M devices, all without requiring an external clock at ≤ 1.04MHz. For multiphase operation at other frequencies, the ISL74420 provides additional scalability, making it a flexible solution for multiphase power architectures.
Its wide input voltage range makes it ideal for high-current FPGA core power and general-purpose power applications. The current mode modulation architecture simplifies loop compensation, enhances power supply rejection, and supports remote sensing to compensate for voltage drops under load. These features deliver a high-density, robust power solution that minimizes external components while ensuring efficient and reliable performance.
特性
- Qualified to Renesas Rad Tolerant Screening and QCI Flow (R34TB0004EU)
- Wide operating voltage range:
- Input: 4.5V to 19V
- Output: 0.6V to V PWR_STAGE ×((TSW -120ns)/TSW)
- Programmable PWM output switching frequency
- 250kHz to 1.5MHz
- Optional droop regulation
- Current mode control provides
- Excellent power supply rejection
- Simplified control scheme
- Output differential remote sensing
- Programmable soft-start
- Enable control
- Power-good Indicator
- TID Radiation Lot Acceptance Testing (LDR: ≤0.01rad(Si)/s)
- ISL73847M30BZ: 30krad(Si)
- ISL73847M50BZ: 50krad(Si)
- SEE Characterization
- No DSEE with VDD = 25V and 43MeV•cm2/mg
- SEFI <3μm2 at 43MeV•cm2/mg
- SET <2% on VOUT at 43MeV•cm2/mg
产品对比
应用
文档
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类型 | 文档标题 | 日期 |
数据手册 | PDF 2.73 MB | |
应用说明 | PDF 391 KB | |
应用说明 | PDF 351 KB | |
技术摘要 | PDF 356 KB | |
应用说明 | PDF 224 KB | |
5 项目
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设计和开发
软件与工具
软件与工具
Software title
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Software type
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公司
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iSim:PE 离线模拟工具 iSim Personal Edition(iSim:PE )可加快设计周期并降低项目早期风险,确定可用于当前和下一代设计的部件。
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Simulator | 瑞萨电子 |
1 项目
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开发板与套件
Radiation Tolerant Compact Single Phase 12V to 1V, 25A Capable Power Supply Demonstration Board
The ISL73847MDEMO2Z demonstration board demonstrates the performance of the ISL73847M dual-phase buck controller in single-phase mode. The board is optimized for a 4.5V to 15V input operation to generate a 25A max, 1V output.
Radiation Tolerant Compact Dual Phase 12V to 1V, 50A Capable Power Supply Demonstration Board
The ISL73847MDEMO1Z demonstration board demonstrates the performance of the ISL73847M dual-phase buck controller. The board is optimized for a 4.5V to 15V input operation to generate a 50A max, 1V output.
Power Management Reference Design for Microchip RT PolarFire FPGA Family
The ISLRTPFDEMO1Z is a comprehensive power management reference design tailored to meet the needs of the Microchip radiation tolerant (RT) PolarFire® SoC FPGA family. The PolarFire SoC system requires various supply rails, each with its own specific DC and AC regulation tolerances and...
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