CS8221YDFR8G ON Semiconductor, CS8221YDFR8G Datasheet - Page 5

• Manufacturer Part Number: CS8221YDFR8G
• Description: IC REG LDO 100MA 5V MCRPWR 8SOIC
• Manufacturer: ON Semiconductor

Specifications of CS8221YDFR8G

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: 6 ~ 26 V
• Voltage - Dropout (typical): 0.4V @ 100mA
• Number Of Regulators: 1
• Current - Output: 100mA
• Current - Limit (min): 125mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ESR is found, a safety factor should be added to allow for the
tolerance of the capacitor and any variations in regulator
performance. Most good quality aluminum electrolytic
capacitors have a tolerance of ± 20% so the minimum value
found should be increased by at least 50% to allow for this
tolerance plus the variation which will occur at low
temperatures. The ESR of the capacitor should be less than
50% of the maximum allowable ESR found in step 3 above.
regulator (Figure 5) is:
P D(max) + V IN(max) * V OUT(min) I OUT(max) ) V IN(max) I Q
where:
permissible value of R
package section of the data sheet. Those packages with
R
the die temperature below 150°C.
dissipate the heat generated by the IC, and an external
heatsink will be required.
ΘJA
Once the minimum capacitor value with the maximum
CALCULATING POWER DISSIPATION IN A SINGLE
The maximum power dissipation for a single output
V
V
I
I
Once the value of P
The value of R
In some cases, none of the packages will be sufficient to
V
OUT(max)
Q
IN
IN(max)
OUT(min)
application, and
I
is the quiescent current the regulator consumes at
’s less than the calculated value in equation 2 will keep
OUT(max)
Figure 5. Single Output Regulator With Key
Performance Parameters Labeled
is the maximum input voltage,
I
IN
is the maximum output current for the
OUTPUT LINEAR REGULATOR
is the minimum output voltage,
.
ΘJA
R QJA +
can then be compared with those in the
ΘJA
D(max)
CS8221
can be calculated:
150C * T A
P D
I
is known, the maximum
Q
I
OUT
http://onsemi.com
V
OUT
(1)
(2)
5
package to improve the flow of heat away from the IC and
into the surrounding air.
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed to
determine the value of R
where:
R
are functions of the package type, heatsink and the interface
between them. These values appear in heat sink data sheets
of heat sink manufacturers.
ΘJA
A heat sink effectively increases the surface area of the
Each material in the heat flow path between the IC and the
R
R
R
R
ΘJC
ΘCS
ΘSA
ΘJC
, it too is a function of package type. R
appears in the package section of the data sheet. Like
= the junction−to−case thermal resistance,
= the case−to−heatsink thermal resistance, and
= the heatsink−to−ambient thermal resistance.
R QJA + R QJC ) R QCS ) R QSA
HEAT SINKS
ΘJA
.
ΘCS
and R
ΘSA
(3)