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ADP1828YRQZ-R7 数据表(PDF) 29 Page - Analog Devices

部件名 ADP1828YRQZ-R7
功能描述  Synchronous Buck PWM, Step-Down, DC-to-DC Controller
PDF  32 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADP1828YRQZ-R7 数据表(HTML) 29 Page - Analog Devices

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ADP1828
Rev. 0 | Page 29 of 32
To achieve an accurate output voltage, proper grounding of the
AGND and PGND planes is needed. For light to medium loads,
connecting the AGND plane to the PGND plane with a trace is
adequate in obtaining good output accuracy (see Figure 51). If
the PGND plane is large enough and under a light to medium
load, the voltage drop across the PGND plane is negligible.
However, under a heavy load, such as at 20 A, the voltage drop
across the PGND plane could be significant, thus affecting the
accuracy of the output. The AGND plane would then have to
be routed directly to the negative terminal of the load and the
power supply, as illustrated in Figure 52. The power supply
GND terminal and the load GND terminal should be placed
as close as possible to each other to minimize the voltage drop
across these two terminals, thus improving the output accuracy.
POWER SUPPLY GND TERMINAL IS
CONNECTED TO PGND PLANE.
AGND
PLANE
PGND PLANE
VOUT
POWER
SUPPLY
GND
TERMINAL
Figure 51. Grounding Technique for a Light to Medium Load
POWER SUPPLY GND TERMINAL IS
CONNECTED TO PGND PLANE.
AGND
PLANE
PGND PLANE
SMALL
AGND TRACE
VOUT
POWER
SUPPLY
GND
TERMINAL
Figure 52. Proper Grounding Technique for a Heavy Load
RECOMMENDED COMPONENT MANUFACTURERS
Table 5.
Vendor
Components
AVX Corporation
Capacitors
Central Semiconductor Corp.
Diodes
Coilcraft, Inc.
Inductors
Diodes, Inc.
Diodes
International Rectifier
Diodes, MOSFETs
Murata Manufacturing Co., Ltd.
Capacitors, inductors
ON Semiconductor
Diodes, MOSFETs
Rubycon Corporation
Capacitors
Sanyo
Capacitors
Sumida Corporation
Inductors
Taiyo Yuden, Inc.
Capacitors, inductors
Toko America, Inc.
Inductors
United Chemi-Con, Inc.
Capacitors
Vishay Siliconix
Diodes, MOSFETs, resistors, capacitors
Wurth Elektronic
Inductors



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