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XR76116

更新时间： 2024-11-22 00:54:27
品牌 Logo 应用领域
艾科嘉 - EXAR /
页数 文件大小 规格书
19页 1003K
描述
PowerBloxTM 15A and 20A Synchronous

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XR76116 数据手册

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XR76116/20  
TM  
PowerBlox 15A and 20A Synchronous  
Step-Down COT Regulators  
Description  
FEATURES  
15A and 20A step-down regulators  
The XR76116 and XR76120 are synchronous step-down regulators  
combining the controller, drivers, bootstrap diode and MOSFETs  
in a single package for point-of-load supplies. The XR76116 has a  
load current rating of 15A and the XR76120 has a load current rating  
of 20A. A wide 5V to 22V input voltage range allows for single supply  
operation from industry standard 5V, 12V and 19.6V rails.  
■
■
4.5V to 5.5V low VIN operation  
5V to 22V wide single input voltage  
3V to 22V operation with external  
■
■
5V bias  
■
≥0.6V adjustable output voltage  
■
Proprietary constant on-time control  
■
With a proprietary emulated current mode constant on-time (COT)  
control scheme, the XR76116/20 provide extremely fast line and  
load transient response using ceramic output capacitors. They  
require no loop compensation, simplifying circuit implementation  
and reducing overall component count. The control loop also  
provides 0.1% load and 0.1% line regulation and maintains constant  
operating frequency. A selectable power saving mode, allows the user  
to operate in discontinuous mode (DCM) at light current loads thereby  
significantly increasing the converter efficiency.  
No loop compensation required  
■
Ceramic output capacitor stable  
operation  
Programmable 70ns-1μs on-time  
Constant 200kHz-1MHz frequency  
Selectable CCM or CCM/DCM  
■
■
■
operation  
■
Power-good flag with low impedance when  
power removed  
Precision enable  
Programmable soft-start  
5mm x 6mm QFN package  
■
■
■
A host of protection features, including overcurrent, over temperature,  
overvoltage, short-circuit, open feedback detect and UVLO, helps  
achieve safe operation under abnormal operating conditions.  
APPLICATIONS  
■
Servers  
Distributed power architecture  
Point-of-load converters  
FPGA, DSP and processor supplies  
The XR76116/20 are available in a RoHS-compliant, green/halogen-  
free space-saving 5mm x 6mm QFN package.  
■
■
■
■
Base stations, switches/routers  
Typical Application  
100  
C
L1  
C
V
600kHz  
ENABLE  
BST  
OUT  
98  
96  
94  
92  
90  
88  
86  
84  
82  
80  
78  
76  
74  
72  
70  
EN  
BST  
SW  
V
IN  
VIN  
R
FF  
LIM  
PVIN  
PGOOD  
VCC  
SS  
ILIM  
R1  
R2  
POWER GOOD  
R
FF  
800kHz  
XR76116/20  
FB  
FCCM  
VSNS  
PGND  
C
IN  
C
OUT  
R
5.0V  
3.3V  
2.5V  
1.8V  
1.5V  
1.2V  
1.0V  
V
OUT  
R1  
TON  
AGND  
R
ON  
R2  
C
C
SS  
VCC  
0.1  
5.1  
10.1  
15.1  
20.1  
I
( )  
A
OUT  
Figure 1. XR76116/20 Typical Application  
Figure 2. XR76120 Efficiency  
REV1A  
1/19  
1234567...19

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