ncv8769 ON Semiconductor, ncv8769 Datasheet - Page 13

• Manufacturer Part Number: ncv8769
• Description: Ultra Low Iq 150 Ma Ldo Regulator With Reset And Early Warning
• Manufacturer: ON Semiconductor

V SI,High
V SI,Low
Thermal Considerations
necessary to provide some thermal relief. The maximum
power dissipation supported by the device is dependent
upon board design and layout. Mounting pad configuration
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Output
Sense
V SI,Low
Sense
ORDERING INFORMATION
Specifications Brochure, BRD8011/D
NCV876950D250R2G
Input
V out
As power in the NCV8769 increases, it might become
V RO
V SO
High
Low
V S I
Figure 24. Sense Input to Sense Output Timing
Figure 23. SO Warning Timing Diagram
Device
T WARNING
Diagram
t PSOLH
Voltage
Output
5.0 V
Reset Delay Time
DT = GND/V
16/32 ms
t PSOHL
http://onsemi.com
t
t
out
13
Threshold
on the PCB, the board material, and the ambient temperature
affect the rate of junction temperature rise for the part. When
the NCV8769 has good thermal conductivity through the
PCB, the junction temperature will be relatively low with
high power applications. The maximum dissipation the
NCV8769 can handle is given by:
NCV8769 soldered on 645 mm
dissipate up to 1.33 W when the ambient temperature (T
is 25°C. See Figure 25 for R
dissipated by the NCV8769 can be calculated from the
following equations:
or
Hints
wide as possible. When the impedance of these traces is
high, there is a chance to pick up noise or cause the regulator
to malfunction. Place external components, especially the
output capacitor, as close as possible to the NCV8769 and
make traces as short as possible.
Figure 25. Thermal Resistance vs. PCB Copper Area
Reset
120
100
(Typ)
110
93 %
Since T
V
90
80
70
60
in
0
and GND printed circuit board traces should be as
J
is not recommended to exceed 150°C, then the
100
V87695050G
P
COPPER HEAT SPREADER AREA (mm
V
D
in(MAX)
Marking
[ V
P
D(MAX)
200
in
[
I
q
@I
P
PCB 1 oz Cu
PCB 2 oz Cu
+
D(MAX)
out
300
thJA
(Pb−Free)
Package
T
SO−14
) I
J(MAX)
I
2
versus PCB area. The power
out
) V
, 1 oz copper area, FR4 can
R
out
400
qJA
) I
V
* T
out
in
q
* V
A
2500 / Tape & Reel
500
I
out
out
Shipping
600
2
)
(eq. 3)
(eq. 4)
(eq. 5)
†
700
A
)