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ISL8117FVEZ

更新时间： 2024-11-12 02:55:35
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英特矽尔 - INTERSIL 开关
页数 文件大小 规格书
23页 918K
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Synchronous Step-down PWM Controller

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DATASHEET  
Synchronous Step-down PWM Controller  
ISL8117  
Features  
The ISL8117 is a synchronous buck controller to generate POL  
voltage rails and bias voltage rails for a wide variety of  
applications in industrial and general purpose segments. Its  
wide input and output voltage ranges make it suitable for  
telecommunication and after-market automotive applications.  
• Wide input voltage range: 4.5V to 60V  
• Wide output voltage range: 0.6V to 54V  
• Light-load efficiency enhancement  
- Low ripple diode emulation mode with pulse skipping  
• Programmable soft-start  
• Supports prebiased output with SR soft-start  
• Programmable frequency: 100kHz to 2MHz  
• External sync  
The ISL8117 uses the valley current modulation technique to  
bring hassle-free power supply design with minimal number of  
components and complete protection from unwanted events.  
The ISL8117 offers programmable soft-start and enable  
functions along with a power-good indicator for ease of supply  
rail sequencing and other housekeeping requirements. In ideal  
situations, a complete power supply circuit can be designed  
with 10 external components and provide OV/OC/OT  
protections in a space conscious 16 Ld 4mmx4mm QFN or  
easy to assemble 6.4mmx5mm 16 Ld HTSSOP package. Both  
packages use an EPAD to improve thermal dissipation and  
noise immunity. Low pin count, less number of external  
components and default internal values, makes the ISL8117  
an ideal solution for quick to market simple power supply  
designs. The ISL8117 utilizes internal loop compensation and  
single resistor settings for other functions such as operating  
frequency and overcurrent protection. Its current mode control  
with VIN feed-forward enables it to cover various applications  
even with fixed internal compensations. The unique  
DEM/Skipping mode at light-load dramatically lowers standby  
power consumption with consistent output ripple over different  
load levels.  
• PGOOD indicator  
• Forced PWM  
• Adaptive shoot-through protection  
• No external current sense resistor  
- Use lower MOSFET rDS(ON)  
• Complete protection  
- Overcurrent, overvoltage, over-temperature, undervoltage  
• Pb-free (RoHS compliant)  
Applications  
• PLC and factory automation  
• Amusement machines  
• Security surveillance  
• Server and data centers  
• Switcher and routers  
• Telecom and datacom  
• LED panels  
Related Literature  
• UG020, “ISL8117EVAL2Z Evaluation Board User Guide”  
• UG021, “ISL8117DEMO2Z Demonstration Board User Guide”  
• UG030, “ISL8117EVAL1Z Evaluation Board User Guide”  
• UG031, “ISL8117DEMO1Z Demonstration Board User Guide”  
VIN  
100  
98  
96  
94  
92  
90  
16  
15  
14  
13  
12  
11  
10  
9
1
2
3
4
5
6
7
8
EXTBIAS  
EN  
VIN  
BOOT  
UGATE  
PHASE  
ISEN  
CLKOUT  
VOUT  
MOD  
SYNC  
SGND  
PGOOD  
RT  
VCC5V  
V
= 60V  
IN  
88  
86  
84  
V
= 24V  
IN  
V
= 18V  
LGATE  
OCS  
IN  
SS/TRK  
FB  
V
= 36V  
10  
IN  
V
= 48V  
IN  
PGND  
0
2
4
6
8
12  
14  
16  
OUTPUT CURRENT (A)  
FIGURE 2. EFFICIENCY  
FIGURE 1. TYPICAL APPLICATION  
June 4, 2015  
FN8666.3  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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