STEVAL-ISA052V2 STMicroelectronics, STEVAL-ISA052V2 Datasheet - Page 43
![BOARD EVAL BASED ON PM6675A](/photos/9/13/91340/steval-isa052v2_sml.jpg)
STEVAL-ISA052V2
Manufacturer Part Number
STEVAL-ISA052V2
Description
BOARD EVAL BASED ON PM6675A
Manufacturer
STMicroelectronics
Type
DC/DC Switching Converters, Regulators & Controllersr
Specifications of STEVAL-ISA052V2
Design Resources
STEVAL-ISA052V2 Gerber Files STEVAL-ISA052V2 Schematic STEVAL-ISA052V2 Bill of Material
Main Purpose
DC/DC, Step Down with LDO
Outputs And Type
2, Non-Isolated
Voltage - Output
1.5V, 0.6 ~ 3.3V
Voltage - Input
4.5 ~ 36 V
Regulator Topology
Buck
Board Type
Fully Populated
Utilized Ic / Part
PM6675AS
Input Voltage
4.5 V to 36 V
Output Voltage
1.5 V
Product
Power Management Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Power - Output
-
Frequency - Switching
-
Lead Free Status / Rohs Status
Supplier Unconfirmed
For Use With/related Products
PM6675AS
Other names
497-8413
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STEVAL-ISA052V2
Manufacturer:
STMicroelectronics
Quantity:
1
PM6675AS
where k is a free design parameter greater than unity (k > 3) . It determinates the minimum
integrator capacitor value C
Equation 49
If the ripple on pin COMP is greater than the integrator output dynamic (150 mV), an
additional capacitor C
attenuation factor of the output ripple, select:
Equation 50
In order to reduce noise on pin COMP, it’s possible to introduce a resistor R
with C
or more times) than the switching frequency of the section:
Equation 51
For most of applications both R
If the ripple is very small (e.g. such as with ceramic capacitors), a further compensation
network, called “Virtual ESR” network, is needed. This additional part generates a triangular
ripple that substitutes the ESR output voltage ripple. The complete compensation scheme is
represented in
Figure 40. Virtual ESR network
Generation
INT
Block
Ton
and C
Figure 40
filt
, realizes a low pass filter. The cutoff frequency must be much greater (10
filt
could be added in order to reduce its amplitude. If q is the desired
.
PWM Comparator
INT
:
C
INT
R
INT
+
INT
-
and C
>
C
=
2
filt
2
⋅ π
VREF
⋅ π
filt
=
⎛
⎜ ⎜
⎝
f
C
CUT
f
are unnecessary.
SW
k
g
INT
m
C
−
C
⋅
q
1
1 (
INT
f
R
INT
Zout
−
INT
C
C
+
) q
⋅
FILT
⎞
⎟ ⎟
⎠
C
C
INT
⋅
FILT
FILT
Vref
Vo
Integrator
g
R
m
+
-
Application information
L
C
R1
0.6V
INT
that, together
VOUT
43/48