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ISL73847M

更新时间： 2024-11-19 15:19:11
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
49页 2628K
描述
Radiation Tolerant Single/Dual-Phase Current Mode PWM Controller

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ISL73847M 数据手册

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Datasheet  
ISL73847M  
Radiation Tolerant Single/Dual-Phase Current Mode PWM Controller  
The ISL73847M is a synchronous buck controller that  
Features  
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.  
▪ Qualified to Renesas Rad Tolerant Screening and  
QCI Flow (R34TB0004EU)  
▪ Wide operating voltage range:  
• Input: 4.5V to 19V  
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.  
• Output: 0.6V to  
V
×((T -120ns)/T  
)
SW  
PWR_STAGE  
SW  
▪ 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  
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  
ISL73847M 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. Together, results in a robust  
power supply solution that requires minimal  
▪ Enable control  
▪ Power-good Indicator  
▪ TID Radiation Lot Acceptance Testing  
(LDR: ≤0.01rad(Si)/s)  
components while achieving high current density.  
The ISL73847M also features a tri-level output that  
provides excellent protection against faults by driving  
a mid scale voltage to signal the power stage to enter  
a Hi-Z condition.  
• ISL73847M30BZ: 30krad(Si)  
• ISL73847M50BZ: 50krad(Si)  
▪ SEE Characterization  
2
• No DSEE with V = 25V and 43MeV•cm /mg  
DD  
The ISL73847M operates across the military  
temperature range from -55°C to +125°C and is  
available in a 24 Ld WSOIC plastic package.  
2
2
• SEFI <3µm at 43MeV•cm /mg  
2
• SET <2% on V  
at 43MeV•cm /mg  
OUT  
Applications  
▪ FPGA Core Power Supply  
▪ General Purpose Power Supply  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
VBUS  
H.B.  
Driver  
-
+
ISEN1  
FPGA  
Core  
VBUS  
ISL73847x  
12V to 1V (500kHz)  
VFB ISEN2  
-
+
5V to 1V (500kHz)  
12V to 1V (250kHz)  
5V to 1V (250kHz)  
+
-
H.B.  
Driver  
0
10  
20  
30  
40  
50  
ILOAD (A)  
Figure 2. 12V to 1V and 5V to 1V Conversion Efficiency  
Figure 1. FPGA Core Power Supply Application  
R34DS0028EU0100 Rev.1.00  
Dec 7, 2023  
Page 1  
© 2023 Renesas Electronics  
1234567...49

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