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ISL85412DEMO1Z

更新时间： 2024-11-16 02:51:47
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瑞萨 - RENESAS /
页数 文件大小 规格书
19页 1265K
描述
Wide VIN 150mA Synchronous Buck Regulator

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DATASHEET  
ISL85412  
Wide V 150mA Synchronous Buck Regulator  
IN  
FN8378  
Rev 1.00  
March 13, 2015  
The ISL85412 is a 150mA synchronous buck regulator with an  
input range of 3.5V to 40V. It provides an easy to use, high  
efficiency low BOM count solution for a variety of applications.  
Features  
• Wide input voltage range of 3.5V to 40V  
• Synchronous operation for high efficiency  
• No compensation required  
The ISL85412 integrates both high-side and low-side NMOS  
FETs and features a PFM mode for improved efficiency at light  
loads. This feature can be disabled if forced PWM mode is  
desired. The part switches at a default frequency of 700kHz.  
By integrating both NMOS devices and providing internal  
configuration, minimal external components are required,  
reducing BOM count and complexity of design.  
• Integrated high-side and low-side NMOS devices  
• Selectable PFM or forced PWM mode at light loads  
• Internal switching frequency 700kHz  
• Continuous output current up to 150mA  
• Internal soft-start  
With the wide V range and reduced BOM, the part provides  
IN  
an easy to implement design solution for a variety of  
applications while giving superior performance. It will provide  
a very robust design for high voltage industrial applications as  
well as an efficient solution for battery powered applications.  
• Minimal external components required  
• Power-good and enable functions available  
Applications  
• Industrial control  
The part is available in a small Pb-free 3mmx3mm TDFN  
plastic package with an operation junction temperature range  
of -40°C to +125°C.  
• Medical devices  
• Portable instrumentation  
• Distributed power supplies  
• Cloud infrastructure  
Related Literature  
• AN1929, “ISL85413EVAL1Z, ISL85412EVAL1Z Evaluation  
Boards”  
• AN1931, “ISL85413DEMO1Z, ISL85412DEMO1Z Wide VIN  
Synchronous Buck Regulator - Short Form”  
100  
90  
V
OUT  
U1 ISL85412  
C4  
R1  
1
2
3
4
8
7
6
5
MODE  
MODE  
BOOT  
VIN  
FB  
VCC  
PG  
80  
R2  
C6  
C5  
0.1µF  
70  
+3.5 ... +40V  
1µF  
VIN  
PG  
3.3V  
OUT  
1.5V  
OUT  
1.8V  
C1  
20µF  
GND  
60  
50  
40  
EN  
PHASE  
EN  
1.2V  
OUT  
OUT  
f
= 700kHz  
5.0V  
OUT  
SW  
2.5V  
OUT  
1.0V  
VOUT  
GND  
OUT  
MAX 150mA  
C8  
L1  
Device must be  
connected to GND  
plane with vias.  
0.00  
0.03  
0.06  
0.09  
0.12  
0.15  
OUTPUT LOAD (A)  
FIGURE 1. TYPICAL APPLICATION  
FIGURE 2. EFFICIENCY vs LOAD, PFM, V = 12V  
IN  
FN8378 Rev 1.00  
March 13, 2015  
Page 1 of 19  
1234567...19

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