STEVAL-ISA052V2 STMicroelectronics, STEVAL-ISA052V2 Datasheet - Page 17

• 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

PM6675AS
The Off-Time duration is solely determined by the output voltage: when lower than the set
value (i.e. the voltage at VSNS pin is lower than the internal reference = 0.6 V), the
synchronous rectifier is turned off and a new cycle begins (
Figure 22. Inductor current and output voltage in steady state conditions
The duty-cycle of the buck converter is, in steady-state conditions, given by
Equation 2
The switching frequency is thus calculated as
Equation 3
where
Equation 4 a
Equation 4 b
Inductor
current
Output
voltage
V
reg
Ton
f
SW
=
T
D
ON
Toff
=
K
α
α
OSC
OSC
OUT
D =
V
V
OUT
IN
V
V
=
=
V
OSC
V
SNS
OUT
V
V
V
IN
V
OUT
OSC
SNS
IN
=
α
α
OSC
OUT
Figure 22
⋅
K
OSC
1
).
Device description
t
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