lm25117psqx National Semiconductor Corporation, lm25117psqx Datasheet - Page 26

• Manufacturer Part Number: lm25117psqx
• Description: Wide Input Range Synchronous Buck Controller With Analog Current Monitor
• Manufacturer: National Semiconductor Corporation

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STEP2: Determine required R
Knowing f
The standard value of 27.4kΩ was selected for R
STEP3: Determine C
Knowing R
CROSS
COMP
, R
, C
COMP
COMP
COMP
is calculated as follows:
is calculated as follows:
to cancel load pole
COMP
COMP
26
The standard value of 10nF was selected for C
STEP4: Determine C
Knowing R
Half of the maximum ESR is assumed as a typical ESR. The
standard value of 150pF was selected for C
COMP
and C
HF
COMP
to cancel ESR zero
, C
HF
is calculated as follows:
HF
.
COMP