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XR76201EVB PDF预览

XR76201EVB

更新时间： 2024-01-09 13:25:39
品牌 Logo 应用领域
艾科嘉 - EXAR /
页数 文件大小 规格书
16页 1464K
描述
40V PowerBloxTM 1.5A Synchronous Step-Down COT Regulator

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XR76201  
40V PowerBloxTM 1.5A Synchronous  
Step-Down COT Regulator  
Description  
FEATURES  
The XR76201 is a synchronous step-down regulator combining the  
controller, drivers, bootstrap diode and MOSFETs in a single package  
for point-of-load supplies. The XR76201 is capable of supplying  
steady state loads of 1.5A. A wide 5V to 40V input voltage range  
allows for single supply operation from 12V battery systems required  
to withstand load dump, industry standard 24V 10ꢀ, 18V to 36V, and  
rectified 18VAC and 24VAC rails.  
ꢀ■  
Controller, drivers, bootstrap diode and  
MOSFETs integrated in one package  
1.5A step-down regulator  
ꢀ■  
Wide 5V to 40V input voltage range  
>0.6V adjustable output voltage  
Proprietary constant on-time control  
No loop compensation required  
Stable ceramic output capacitor  
operation  
ꢀ■  
With a proprietary emulated current mode Constant On-Time (COT)  
control scheme, the XR76201 provides 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  
0.05ꢀ load and 0.15ꢀ line regulation and maintains constant  
operating frequency. A selectable power saving mode allows the user  
to operate in Discontinuous Conduction Mode (DCM) at light current  
loads thereby significantly increasing the converter efficiency.  
Programmable 100ns to 1µs on-time  
Constant 400kHz to 800kHz  
frequency  
Selectable CCM or CCM/DCM  
CCM/DCM for high efficiency at  
light-load  
ꢀ■  
CCM for constant frequency at  
light-load  
Programmable hiccup current limit with  
thermal compensation  
ꢀ■  
A host of protection features, including overcurrent, over temperature,  
short-circuit and UVLO, helps achieve safe operation under abnormal  
operating conditions.  
ꢀ■  
ꢀ■  
ꢀ■  
Precision enable and power good flag  
Programmable soft-start  
30-pin 5mm x 5mm QFN package  
The XR76201 is available in a RoHS-compliant, green/halogen-free  
space-saving 5mm x 5mm QFN package.  
APPLICATIONS  
ꢀ■  
Automotive systems  
Industrial  
ꢀ■  
ꢀ■  
Military  
Ordering Information – back page  
Typical Application  
3.340  
3.330  
3.320  
3.310  
3.300  
3.290  
3.280  
3.270  
3.260  
V
IN  
VIN  
PVIN  
BST  
SW  
C
BST  
ENABLE/MODE  
EN/MODE  
PGOOD  
VCC  
V
L1  
POWER GOOD  
OUT  
C
IN  
R
PGOOD  
R
LIM  
XR76201  
SS  
ILIM  
FB  
C
R
FF  
1
C
OUT  
TON  
C
C
SS  
R
VCC  
ON  
R
2
AGND  
PGND  
5
10  
15  
20  
25  
30  
35  
40  
V
(V)  
IN  
Figure 1. Typical Application  
Figure 2. Line Regulation  
REV1A  
1/16  
1234567...16

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