STEVAL-ISA051V2 STMicroelectronics, STEVAL-ISA051V2 Datasheet - Page 27

• Manufacturer Part Number: STEVAL-ISA051V2
• Description: BOARD EVAL PM6670AS DDR2/3
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA051V2

• Design Resources: STEVAL-ISA051V2 Gerber Files STEVAL-ISA051V2 Schematic STEVAL-ISA051V2 Bill of Material
• Main Purpose: Special Purpose DC/DC, DDR Memory Supply
• Outputs And Type: 4, Non-Isolated
• Voltage - Output: 1.5V, 1.8V
• Voltage - Input: 4.5 ~ 36V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: PM6670A
• Input Voltage: 4.5 V to 36 V
• Output Voltage: 1.8 V, 1.5 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: PM6670AS
• Kit Application Type: Power Management
• Application Sub Type: DDR2/3 Memory Power Supply Controller
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: PM6670AS
• Other names: 497-8412

PM6670AS
Equation 14
Moreover, the C
Equation 15
where R
the Virtual-ESR Network (R
determines the minimum integrator capacitor value C
Equation 16
The capacitor of the Virtual-ESR Network, C, is chosen as follows:
Equation 17
and R is calculated to provide the desired triangular ripple voltage:
Equation 18
Finally the R1 resistor is calculated according to expression 19:
Equation 19
TOT
is the sum of the ESR of the output capacitor and the equivalent ESR given by
INT
capacitor must meet the following condition:
VESR
Doc ID 14436 Rev 2
C
f
SW
). The k parameter must be greater than unity (k > 3) and
INT
R
TOT
>
R
>
k
1
R
2
⋅
= ESR + R
=
f
⋅ π
C
Z
=
R
R
>
=
⎛
⎜
⎝
R
⋅
f
5
−
g
⎛
⎜ ⎜
⎝
SW
2
VESR
k
m
C
⋅
⋅ π
C
C
L
⋅
−
⋅
C
INT
⋅ π
1
⋅ π
1
⋅
f
out
VESR
Z
C
f
k
Z
f
⎞
⎟
⎠
Z
INT
⋅
⋅
⎞
⎟ ⎟
⎠
R
Vout
TOT
Vr
:
Device description
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