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XR79203EVB PDF预览

XR79203EVB

更新时间： 2024-02-15 08:23:00
品牌 Logo 应用领域
艾科嘉 - EXAR /
页数 文件大小 规格书
19页 2284K
描述
40V, 3A Synchronous Step-Down

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XR79203EVB 数据手册

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XR79203  
40V, 3A Synchronous Step-Down  
COT Power Module  
Description  
FEATURES  
The XR79203 is part of a family of 40V synchronous step-down  
power modules combining the controller, drivers, inductor, passive  
components and MOSFETs in a single package for point-of-load  
supplies. This module requires very few external components leading  
to ease of design and fast time to market. The XR79203 has load  
current rating of 3A. A wide 5V to 40V input voltage range allows for  
single supply operation from industry standard 24V 10ꢀ, 18V to 36V  
and rectified 18VAC and 24VAC rails.  
ꢀ■  
ꢀ■  
ꢀ■  
3A step-down power module  
5V to 40V wide single input voltage  
≥0.6V adjustable output voltage  
Controller, drivers, inductor, passive  
components and MOSFETs integrated in  
one package  
Proprietary constant on-time control  
No loop compensation required  
Stable with ceramic output capacitors  
Programmable 100ns-1µs on-time  
Constant 400kHz to 800kHz frequency  
Selectable CCM or DCM/CCM  
operation  
With a proprietary emulated current mode Constant On-Time (COT)  
control scheme, the XR79203 provides extremely fast line and load  
transient response using ceramic output capacitors. It requires no  
loop compensation, simplifying circuit implementation and reducing  
overall component count. The control loop also provides 0.1ꢀ load  
and 0.2ꢀ line regulation and maintains constant operating frequency.  
A selectable power saving mode, allows the user to operate in  
Discontinuous Current Mode (DCM) at light current loads significantly  
increasing the converter efficiency.  
ꢀ■  
ꢀ■  
ꢀ■  
Precision enable and power-good flag  
Programmable soft-start  
8mm x 8mm x 4mm QFN package  
APPLICATIONS  
ꢀ■  
Drones and remote vehicles  
Automotive displays  
FPGA/DSP/processor supplies  
Industrial control and automation  
Telecommunications and infrastructure  
equipment  
ꢀ■  
A host of protection features, including overcurrent, over temperature,  
short-circuit and UVLO, helps achieve safe operation under abnormal  
operating conditions.  
ꢀ■  
ꢀ■  
ꢀ■  
The XR79203 is available in a RoHS-compliant, green/halogen-free  
space-saving 8mm x 8mm x 4mm QFN package.  
ꢀ■  
Distributed power architecture  
Typical Application  
100  
V
IN  
700kHz  
VIN  
PVIN  
95  
90  
85  
80  
ENABLE/MODE  
EN/MODE  
PGOOD  
VCC  
V
POWER GOOD  
OUT  
VOUT  
SW  
C
R
FF  
C
IN  
XR79203  
R
PGOOD  
R
LIM  
500kHz  
75  
SS  
ILIM  
FB  
R
FF  
FB1  
C
OUT  
70  
TON  
12.0V  
5.0V  
AGND  
PGND  
C
C
R
ON  
VCC  
SS  
R
FB2  
65  
3.3V  
1.8V  
60  
0.0  
0.5  
1.0  
1.5  
(A)  
2.0  
2.5  
3.0  
I
OUT  
Figure 1. Typical Application  
Figure 2. Efficiency, 24V  
IN  
REV1B  
1/19  
1234567...19

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