STEVAL-ISA051V1 STMicroelectronics, STEVAL-ISA051V1 Datasheet - Page 27
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STEVAL-ISA051V1
Manufacturer Part Number
STEVAL-ISA051V1
Description
BOARD EVAL PM6670S DDR2/3
Manufacturer
STMicroelectronics
Type
DC/DC Switching Converters, Regulators & Controllersr
Specifications of STEVAL-ISA051V1
Design Resources
STEVAL-ISA051V1 Gerber Files STEVAL-ISA051V1 Schematic STEVAL-ISA051V1 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 ~ 28V
Regulator Topology
Buck
Board Type
Fully Populated
Utilized Ic / Part
PM6670
Input Voltage
4.5 V to 28 V
Output Voltage
1.8 V, 1.5 V
Product
Power Management Modules
Silicon Manufacturer
ST Micro
Silicon Core Number
PM6670S
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
PM6670S
Other names
497-8411
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STEVAL-ISA051V1
Manufacturer:
STMicroelectronics
Quantity:
1
PM6670S
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 14432 Rev 4
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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