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ISL85005AFRZ PDF预览

ISL85005AFRZ

更新时间： 2024-11-16 00:56:07
品牌 Logo 应用领域
英特矽尔 - INTERSIL 接口集成电路
页数 文件大小 规格书
22页 1040K
描述
Internal or external compensation options

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ISL85005AFRZ 数据手册

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DATASHEET  
4.5V to 18V Input, 5A High Efficiency Synchronous  
Buck Regulator  
ISL85005, ISL85005A  
Features  
The ISL85005 and ISL85005A are monolithic, synchronous  
buck regulators with integrated 5A, 18V high-side and low-side  
FETs. These devices also provide an integrated bootstrap diode  
for the high-side gate driver to reduce the external parts count.  
These devices have a wide input voltage range to support  
applications with input voltage from multi-cell batteries or  
regulated 5V and 12V power rails.  
• 4.5V to 18V input voltage range  
• Internal 5A, 18V high-side and low-side MOSFET switches  
• ±1%, 0.8V feedback voltage reference  
• Integrated bootstrap diode with undervoltage detection  
• Current mode control with internal slope compensation  
• Internal or external compensation options  
• Default internally set 500kHz switching frequency  
• Synchronization capability to external clock (ISL85005)  
The ISL85005 and ISL85005A regulate the output voltage  
with current mode control and have an internal oscillator. The  
switching frequency of the ISL85005 is internally set as  
500kHz, and can be synchronized to an external clock signal  
with frequency ranges from 300kHz to 2MHz. The ISL85005A  
has a fixed 500kHz switching frequency.  
• Diode Emulation Mode (DEM) and forced CCM (FCCM)  
options (ISL85005)  
• Adjustable soft-start time (ISL85005A)  
• Output Power-Good (PG) indicator  
The ISL85005 has a fixed 2.3ms soft-start, while the  
ISL85005A features programmable soft-start to limit inrush  
current during startup. With SS pin floating, the soft-start time  
of ISL85005A is also 2.3ms.  
• Input undervoltage lockout (UVLO), input and output  
overvoltage protection  
• High-side cycle-by-cycle current limit, low-side forward and  
reverse overcurrent protection, and thermal shutdown  
The ISL85005 can be configured in either forced Continuous  
Conduction Mode (CCM) or Diode Emulation Mode (DEM). DEM  
enables high efficiency at light-load conditions. The  
ISL85005A always operates in forced CCM.  
• Small 12-pin 3mmx4mm Dual Flat No-Lead (DFN) package  
with EPAD for enhanced thermal performance  
Applications  
• Network and communication equipments  
• Battery powered systems  
• Multifunction printers  
The ISL85005 and ISL85005A have built-in protections  
including input UVLO protection, input and output overvoltage  
protection, high-side cycle-by-cycle current limit, low-side  
forward current limit and reverse current limit, and thermal  
shutdown.  
• Point-of-load regulators  
Related Literature  
• For a full list of related documents, visit our website  
- ISL85005, ISL85005A product pages  
• Standard 12V rail supplies  
• Embedded computing systems  
Typical Application  
95  
90  
85  
80  
75  
70  
ISL85005  
GND = DEM; VCC = FCCM  
SYNC/  
MODE  
MODE  
BOOT  
VDD  
1
2
3
4
5
6
12  
11  
C
4
V
IN  
PG  
EN  
PG  
4.5V TO 18V  
EN  
VIN 10  
PGND  
VIN  
9
C
FB  
C
6
3
C
5
V
R
1
OUT  
2
PHASE  
PHASE  
8
7
COMP  
AGND  
12V TO 5V  
R
1
5A MAX  
65  
C
12V TO 3.3V  
L
1
60  
C
C
12V TO 1.8V  
8
9
55  
50  
0
1
2
3
4
5
OUTPUT CURRENT (A)  
FIGURE 1. ISL85005 WITH INTERNAL COMPENSATION  
FIGURE 2. EFFICIENCY vs OUTPUT CURRENT  
November 28, 2016  
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 2016. 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.  
1
FN8871.0  
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