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ISL85402IRZ

更新时间： 2024-11-15 11:12:55
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英特矽尔 - INTERSIL 转换器稳压器
页数 文件大小 规格书
18页 897K
描述
2.5A Regulator with Integrated High-Side MOSFET for Synchronous Buck or Boost Buck Converter

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ISL85402IRZ 数据手册

 浏览型号ISL85402IRZ的Datasheet PDF文件第2页浏览型号ISL85402IRZ的Datasheet PDF文件第3页浏览型号ISL85402IRZ的Datasheet PDF文件第4页浏览型号ISL85402IRZ的Datasheet PDF文件第5页浏览型号ISL85402IRZ的Datasheet PDF文件第6页浏览型号ISL85402IRZ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 voltage range from 3V to 36V. Regarding the  
output current capability from the thermal perspective, the  
ISL85402 can typically support continuous load of 2.5A under  
• Ultra Wide Input Voltage Range 3V to 36V  
• Optional Mode Operation  
- Forced PWM Mode  
- Selectable PFM with Programmable PFM/PWM Boundary  
• 300µA IC Quiescent Current (PFM, No Load); 180µA Input  
Quiescent Current (PFM, No Load, V  
AUXVCC)  
conditions of 5V V , V range of 8V to 30V, 500kHz, +85°C  
OUT IN  
Connected to  
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 13 for more details.  
OUT  
• Less than 3µA Standby Input Current (IC Disabled)  
• Operational Topologies  
- Synchronous Buck  
- Non-Synchronous Buck  
The ISL85402 has 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  
- Two-Stage Boost Buck  
• Programmable Frequency from 200kHz to 2.2MHz and  
Frequency Synchronization Capability  
to V  
). The load boundary between PFM and PWM can be  
OUT  
programmed to cover wide applications.  
• ±1% Tight Voltage Regulation Accuracy  
• Reliable Overcurrent Protection  
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 3V or lower (Refer to “Typical  
Application Schematic III - Boost Buck Converter” on page 5).  
- 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  
V
IN  
VIN  
BOOT  
12V V  
IN  
AUXVCC  
36V V  
IN  
24V V  
VCC  
ILIMIT  
SS  
V
OUT  
IN  
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
September 29, 2011  
FN7640.0  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011. 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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ISL85402IRZ 替代型号

型号 品牌 替代类型 描述 数据表
ISL85402IRZ-TK INTERSIL

完全替代

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