ADP1828LC-EVALZ Analog Devices Inc, ADP1828LC-EVALZ Datasheet - Page 4

• 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: -

EVAL-ADP1828LC
of the MOSFET can vary by more than 25% from part to part,
and by more than 50% over the temperature range; therefore,
the actual current limit can vary by more than 50% from part to
part over the temperature range. For more information on this
topic, see the ADP1828 data sheet.
SWITCHING NOISE AND OVERSHOOT REDUCTION
An RC snubber can be added between SW and PGND to reduce
noise and ringing at the SW node and at the drains of the external
MOSFETs. In this design, an RC snubber is added with an R
of 3.01 Ω and a C
reduce overshoot voltage at the drains of the MOSFETs. For
more information, see the ADP1828 data sheet.
COMPENSATION DESIGN
Type III compensation is used in this design because all output
capacitors all ceramic with very low ESR. For information on
calculating the compensation component values, refer to the
ADP1828 data sheet.
SNUB
of 1.2 nF. Gate resistors can be added to
SNUB
Rev. 0 | Page 4 of 12
V
The compensation values for this evaluation board have been
optimized as follows:
R
C
R
C
C
R
R
OUT
FF
Z
TOP
BOT
FF
I
HF
= 3.9 nF
= 7.5 kΩ
= 422 Ω
= 1 nF
= 33 pF
= 20 kΩ
= 10 kΩ
R
R
R
FF
TOP
BOT
C
FF
INTERNAL
FB
VREF
Figure 2. Type III Compensation
R
Z
C
EA
HF
C
I
COMP