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ISL85402IRZ-T13

更新时间： 2024-11-15 14:51:39
品牌 Logo 应用领域
瑞萨 - RENESAS 开关
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22页 1426K
描述
SWITCHING REGULATOR

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ISL85402IRZ-T13 技术参数

是否Rohs认证：符合生命周期：Transferred
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.73
Is Samacsys：N模拟集成电路 - 其他类型：SWITCHING REGULATOR
JESD-609代码：e3湿度敏感等级：1
端子面层：Matte Tin (Sn) - annealedBase Number Matches：1

ISL85402IRZ-T13 数据手册

 浏览型号ISL85402IRZ-T13的Datasheet PDF文件第2页浏览型号ISL85402IRZ-T13的Datasheet PDF文件第3页浏览型号ISL85402IRZ-T13的Datasheet PDF文件第4页浏览型号ISL85402IRZ-T13的Datasheet PDF文件第5页浏览型号ISL85402IRZ-T13的Datasheet PDF文件第6页浏览型号ISL85402IRZ-T13的Datasheet PDF文件第7页 
2.5A Regulator with Integrated High-Side MOSFET for  
Synchronous Buck or Boost Buck Converter  
ISL85402  
Features  
The ISL85402 is a synchronous buck controller with a 125mΩ  
high-side MOSFET and low-side driver integrated. The ISL85402  
supports a wide input range of 3V to 36V in buck mode. It  
• Buck Mode: Input Voltage Range 3V to 36V (Refer to “Input  
Voltage” on page 13 for more details)  
• Boost Mode Expands Operating Input Voltage Lower Than  
2.5V (Refer to “Input Voltage” on page 13 for more details)  
supports 2.5A continuous load under conditions of 5V V , V  
OUT IN  
range of 8V to 36V, 500kHz and +105°C ambient temperature  
with still air. For any specific application, the actual maximum  
output current depends upon the die temperature not exceeding  
+125°C with the power dissipated in the IC, which is related to input  
voltage, output voltage, duty cycle, switching frequency, board layout  
and ambient temperature, etc. Refer to “Output Current” on page 14  
for more details.  
• Selectable Forced PWM Mode or PFM Mode  
• 300µA IC Quiescent Current (PFM, No Load); 180µA Input  
Quiescent Current (PFM, No Load, V  
AUXVCC)  
Connected to  
OUT  
• Less than 3µA Shut Down Input Current (IC Disabled)  
• Operational Topologies  
The ISL85402 has a flexible selection of operation modes of  
forced PWM mode and PFM mode. In PFM mode, the  
quiescent input current is as low as 180µA (AUXVCC connected  
- Synchronous Buck  
- Non-Synchronous Buck  
- Two-Stage Boost Buck  
to V  
). The load boundary between PFM and PWM can be  
OUT  
• Programmable Frequency from 200kHz to 2.2MHz and  
Frequency Synchronization Capability  
programmed to cover wide applications.  
The low-side driver can be either used to drive an external low-side  
MOSFET for a synchronous buck, or left unused for a standard  
non-synchronous buck. The low-side driver can also be used to  
drive a boost converter as a pre-regulator followed by a buck  
controlled by the same IC, which greatly expands the operating  
input voltage range down to 2.5V or lower (Refer to “Typical  
Application Schematic III - Boost Buck Converter” on page 5).  
• ±1% Tight Voltage Regulation Accuracy  
• Reliable Overcurrent Protection  
- Temperature Compensated Current Sense  
- Cycle-by-Cycle Current Limiting with Frequency Foldback  
- Hiccup Mode for Worst Case Short Condition  
• 20 Ld 4x4 QFN Package  
• Pb-Free (RoHS Compliant)  
The ISL85402 offers the most robust current protections. It  
uses peak current mode control with cycle-by-cycle current  
limiting. It is implemented with frequency foldback under  
current limit condition; besides that, the hiccup overcurrent  
mode is also implemented to guarantee reliable operations  
under harsh short conditions.  
Applications  
• General Purpose  
• 24V Bus Power  
• Battery Power  
The ISL85402 has comprehensive protections against various faults  
including overvoltage and over-temperature protections, etc.  
•
Point of Load  
• Embedded Processor and I/O Supplies  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
6V V  
IN  
PGOOD  
EN  
MODE  
SYNC  
12V V  
IN  
V
IN  
VIN  
BOOT  
36V V  
AUXVCC  
IN  
24V V  
IN  
VCC  
ILIMIT  
SS  
V
OUT  
ISL85402  
PHASE  
LGATE  
PGND  
EXT_BOOST  
FS  
SGND  
FB  
COMP  
0.1m  
1m  
10m  
100m  
1.0  
2.5  
LOAD CURRENT (A)  
FIGURE 2. EFFICIENCY, SYNCHRONOUS BUCK, PFM MODE,  
5V, T = +25°C  
FIGURE 1. TYPICAL APPLICATION  
V
OUT  
A
April 25, 2013  
FN7640.1  
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 2011, 2013. 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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