STEVAL-ISA052V2 STMicroelectronics, STEVAL-ISA052V2 Datasheet - Page 42

• 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

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