特長
- Wide operating voltage range:
- Input: 4.5V to 19V
- Output: 0.6V to VPWR_STAGE×((TSW-120ns)/TSW)
- Programmable 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
- Radiation acceptance testing
- LDR (0.01rad(Si)/s): 75krad(Si)
- SEE hardness (see SEE report for details)
- No SEB/SEL LETTH, VDD = 25V: 86MeV•cm2/mg
- SET/SEFI free at LET 86MeV•cm2/mg
- Qualified to Renesas Rad Hard QML-V Equivalent Screening and QCI flow (R34TB0001EU)
- All screening and QCI are in accordance with MIL-PRF-38535L Class V
説明
The ISL73847SEH is a synchronous buck controller that can operate as a single or dual-phase controller. It is intended to work with the ISL73041SEH (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 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 wide input voltage range makes it a suitable power supply option for a high-current FPGA core and other general-purpose power solutions. The ISL73847SEH uses current-mode modulation, which simplifies loop compensation and provides excellent power supply rejection. Additionally, the output is remotely sensed to compensate for any voltage drop in the load conditions. All of this put together results in a robust power supply solution that requires minimal components while achieving high current density.
The ISL73847SEH also features a tri-level output, which provides excellent protection against faults by driving a mid-scale voltage to signal the power stage to enter a Hi-Z condition.
The ISL73847SEH operates across the military temperature range from -55°C to +125°C and is available in a 24 Ld hermetically sealed ceramic dual flatpack (CDFP) package or in die form.
パラメータ
| 属性 | 値 |
|---|---|
| Rating | Space |
| Control Mode | Peak Current Mode |
| Phases (Max) | 2 |
| No-Load Operating Current | 12 mA |
| Quiescent Current | 11µA |
| Supply Voltage (min) (V) | 4.5 - 4.5 |
| Supply Voltage (max) (V) | 19 - 19 |
| Switching Frequency (min) (kHz) | 250 |
| Switching Frequency (max) (kHz) | 1500 |
| Topology | Sync. Buck |
| VREF (V) | 0.6 |
| Temp. Range (°C) | -55 to +125°C |
| TID HDR (krad(Si)) | 100 |
| TID LDR (krad(Si)) | 75 |
| DSEE (MeV·cm2/mg) | 86 |
| Flow | RH Hermetic |
| Qualification Level | Class Ve, EM |
| Die Sale Availability? | Yes |
| PROTO Availability? | Yes |
アプリケーション・ブロック図
 | 耐放射線性 Versal 用パワー ツリー AMD Versalを使用した衛星アプリケーション向けの耐放射線性電源です。 |
その他アプリケーション
- FPGA core power supply
- General-purpose power supply
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Radiation Hardened Single/Dual-Phase Current Mode PWM Controller Evaluation Board
The ISL73847SEHEV2Z evaluation board is used to evaluate the performance of the ISL73847SEH radiation hardened dual-phase buck controller. The evaluation board is optimized for a 4.5V to 15V input operation to generate a 50A max, 1V output. Input and output connections, test points, and jumper... 続きを読む
Radiation Hardened Quad-Phase Current Mode PWM Controller Evaluation Board
The ISL73847SEHEV3Z evaluation board benchmarks the performance of two ISL73847SEH radiation hardened dual-phase buck controllers, four ISL73041SEH GaN half-bridge drivers, and twelve ISL70020SEH 40V GaN FETs in a 4-phase, 100A configuration. It is designed for the VERSAL VC1902 VCCINT core rail.
Radiation Hardened Compact 12V to 1V, 50A Capable Power Supply Demonstration Board
The ISL73847SEHDEMO2Z demonstration board demonstrates the performance of the ISL73847SEH radiation hardened dual-phase buck controller. The board is optimized for a 4.5V to 15V input operation to generate a 50A max, 1V output.
Radiation Hardened Compact 12V to 1V, 25A Capable Power Supply Demonstration Board
The ISL73847SEHDEMO5Z demonstration board demonstrates the performance of the ISL73847SEH radiation hardened, 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 Hardened Quad-Phase Current Mode PWM Controller Demonstration Board
The ISL73847SEHDEMO6Z demonstration board demonstrates the performance of two ISL73847SEH radiation hardened dual-phase buck controllers, four ISL73041SEH GaN half-bridge drivers, and twelve ISL70020SEH 40V GaN FETs in a 4-phase, 100A configuration. It is designed for the VERSAL VC1902 VCCINT... 続きを読む
Power Management Reference Design for AMD Versal XQRVC1902
The ISLVERSALDEMO2Z board provides power management for the AMD Xilinx Space Grade Versal ACAP AI Core VC1902 using Renesas' radiation hardened power management devices. The Versal ACAP system requires various supply rails, including the core, digital, analog, and DDR memory. The ISLVERSALDEMO2Z... 続きを読む
