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CS8361 Datasheet(PDF) 5 Page - Cherry Semiconductor Corporation

Part No. CS8361
Description  5V Dual Micropower Low Dropout Regulator with ENABLE and RESET
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Maker  CHERRY [Cherry Semiconductor Corporation]
Homepage  http://www.cherrycorp.com/
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CS8361 Datasheet(HTML) 5 Page - Cherry Semiconductor Corporation

   
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VIN
VSTBY
CS8361
Gnd
10
µF
ESR<8
VDD
I/O
MCU
Gnd
B+
C2**
C1*
VTRK
RESET
ENABLE
RESET
5V, 100mA
Adj
10
µF
ESR<8
C3**
SW 8V,
250mA
R3
R2
R1
* C1 is required if regulator is located far from power supply filter.
** C2 and C3 are required for stability.
VTRK ~ VSTBY (1 + R1/R2)
For VTRK ~ 8V, R1/R2 ~ 0.6
0.1
µF
5
Test & Application Circuits
VIN
VSTBY
CS8361
Gnd
10
µF
ESR<8
VDD
I/O
MCU
Gnd
B+
C2**
C1*
VTRK
RESET
ENABLE
RESET
5V, 100mA
Adj
10
µF
ESR<8
C3**
SW 5V,
250mA
R1
0.1
µF
* C1 is required if regulator is located far from power supply filter.
** C2 and C3 are required for stability.
A heat sink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and the
outside environment will have a thermal resistance. Like
series electrical resistances, these resistances are summed
to determine the value of RQJA:
RQJA = RQJC + RQCS + RQSA
(3)
where:
RQJC = the junctionÐtoÐcase thermal resistance,
RQCS = the caseÐtoÐheat sink thermal resistance, and
RQSA = the heat sinkÐtoÐambient thermal resistance.
RQJC appears in the package section of the data sheet. Like
RQJA, it too is a function of package type. RQCS and RQSA
are functions of the package type, heat sink and the inter-
face between them. These values appear in heat sink data
sheets of heat sink manufacturers.
Heat Sinks
Application Notes: continued
Figure 2: 5V, 8V Regulator
Figure 3: Dual 5V Regulator


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