STEVAL-ISA052V1 STMicroelectronics, STEVAL-ISA052V1 Datasheet - Page 49

• Manufacturer Part Number: STEVAL-ISA052V1
• Description: KIT EVAL PM6675S HE CTLR 2A REG
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISA052V1

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 2, Non-Isolated
• Voltage - Output: 1.5V, 0.6 ~ 3.3V
• Current - Output: 10A, 2A
• Voltage - Input: 4.5 ~ 28 V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: PM6675
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-8426

PM6675S
Then calculate R in order to have enough ripple voltage on the integrator input:
Equation 54
Where R
equivalent ESR of 30-50 mΩ , even though the choice depends on inductor current ripple.
Then choose R1 as follows:
Equation 55
VESR
is the new virtual output capacitor ESR. A good trade-off is to consider an
R
1
R
=
=
R
R
R
⋅
−
⎛
⎜ ⎜
⎝
VESR
⋅ π
⋅ π
L
f
1
Z
f
1
Z
⋅
⋅
C
⋅
C
C
⎞
⎟ ⎟
⎠
Application information
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