STEVAL-ISA052V2 STMicroelectronics, STEVAL-ISA052V2 Datasheet - Page 42
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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
Application information
8.1.7
42/48
where R
effect and the worst case value in R
The accuracy of the valley current also depends on the offset of the internal comparator
(±6 mV).
The negative valley-current limit (if the device works in forced-PWM mode) is given by:
Equation 47
All ceramic capacitors application
Design of external feedback network depends on the output voltage ripple across the output
capacitors ESR. If the ripple is great enough (at least 20 mV), the compensation network
simply consist of a C
Figure 39. Integrative compensation
The stability of the system depends firstly on the output capacitor zero frequency. It must be
verified that:
Equation 48
DSon
COMP
C
FILT
is the drain-source on-resistance low-side switch. Consider the temperature
INT
R
capacitor.
INT
VREF
f
SW
Integrator
C
Ton One-shot
INT
generator
DSon
>
Comparator
+
k
-
I
NEG
⋅
PWM
f
calculation (typically +0.4 %/°C).
Zout
g
m
=
+
-
=
110
R
2
DSon
⋅ π
mV
R
Vr=0.6
k
out
C
out
VSNS
VOUT
PM6675AS