EVALA5973AD STMicroelectronics, EVALA5973AD Datasheet - Page 19

• Manufacturer Part Number: EVALA5973AD
• Description: Power Management Modules & Development Tools EVAL BOARD A5973AD Auto Grade
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of EVALA5973AD

• Input Voltage: 4.4 V to 36 V
• Output Voltage: 1.235 V to 35 V
• Board Size: 23 mm x 20 mm
• Product: Power Management Modules
• Supply Current: 2.5 A
• Dimensions: 23 mm x 20 mm
• For Use With/related Products: AN1518
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN1518
Where T
current flowing into it during the turn ON and turn OFF phases. T
switching time.
●
Equation 24
Where I
Example:
R
150 °C. We can consider a value of 0.4 Ω .
T
I
The overall losses are:
Equation 25
The junction temperature of device will be:
Equation 26
Where T
ambient. Considering that the device is mounted on board with a good groundplane, that it
has a thermal resistance junction-to-ambient (Rth
temperature of about 70 °C:
Equation 27
Q
SW
DSON
has a typical value of 2.5 mA @ V
Quiescent current losses.
–
–
–
is approximately 70 ns.
has a typical value of 0.25 @ 25 °C and increases up to a maximum value of 0.5. @
Q
A
ON
V
V
I
is the quiescent current.
OUT
is the ambient temperature and Rth
IN
OUT
and T
=
= 5 V
P
= 2 A
0.4
TOT
= 3.3 V
OFF
•
=
2
2
R
are the overlap times of the voltage across the power switch and the
•
DSON
0.7
+
•
5 2
(
•
I
OUT
T
T
•
J
J
70
)
=
2
IN
=
•
70
•
P
= 12 V.
T
D
10
A
Q
+
+
+
–
1.3 42
=
V
9
Rth
IN
•
V
J-A
•
250
IN
•
J A
–
I
•
OUT
is the thermal resistance junction-to-
J-A
•
I
≅
Q
•
10
) of about 42 °C/W, and an ambient
125° C
P
•
–
TOT
T
3
SW
+
5 2.5
•
•
F
SW
•
SW
+
Application information
10
V
is the equivalent
IN
–
3
•
≅
I
1 3W
Q
,
=
19/30