ADP1828LC-EVALZ Analog Devices Inc, ADP1828LC-EVALZ Datasheet - Page 30

• Manufacturer Part Number: ADP1828LC-EVALZ
• Description: BOARD EVALUATION ADP1828LC
• Manufacturer: Analog Devices Inc

Specifications of ADP1828LC-EVALZ

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.8V
• Current - Output: 5A
• Voltage - Input: 5.5 ~ 13.2V
• Regulator Topology: Buck
• Frequency - Switching: 600kHz
• Board Type: Fully Populated
• Utilized Ic / Part: ADP1828
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

ADP1828
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 52). If
the PGND plane is large enough and under a light to medium
load, the voltage drop across the PGND plane is negligible.
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Figure 52. Grounding Technique for a Light to Medium Load
PLANE
AGND
POWER SUPPLY GND TERMINAL IS
CONNECTED TO PGND PLANE.
PGND PLANE
TERMINAL
SUPPLY
POWER
GND
V
OUT
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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 53. 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.
Figure 53. Proper Grounding Technique for a Heavy Load
PLANE
AGND
POWER SUPPLY GND TERMINAL IS
CONNECTED TO PGND PLANE.
AGND TRACE
SMALL
PGND PLANE
TERMINAL
SUPPLY
POWER
GND
V
OUT