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PDF CS8361YDPSR7 Data sheet ( Hoja de datos )
| Número de pieza | CS8361YDPSR7 | |
| Descripción | 5V Dual Micropower Low Dropout Regulator with ENABLE and RESET | |
| Fabricantes | Cherry Semiconductor Corporation | |
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CS8361
5V Dual Micropower Low Dropout
Regulator with ENABLE and RESET
Description
Features
The CS8361 is a precision micro-
power dual voltage regulator with
ENABLE and RESET.
The 5V standby output is accurate
within ±2% while supplying loads
of 100mA and has a typical
dropout voltage of 400mV.
Quiescent current is low, typically
140µA with a 300µA load. The
active RESET output monitors the
5V standby output and holds
the RESET line low during power-
up and regulator dropout condi-
tions. The RESET circuit includes
hysteresis and is guaranteed to
operate correctly with 1V on the
standby output.
The second output tracks the 5V
standby output through an external
adjust lead, and can supply loads
of 250mA with a typical dropout
voltage of 400mV. The logic level
ENABLE lead is used to control
this tracking regulator output.
Both outputs are protected against
overvoltage, short circuit, reverse
battery and overtemperature condi-
tions. The robustness and low qui-
escent current of the CS8361 makes
it not only well suited for automo-
tive microprocessor applications,
but for any battery powered micro-
processor applications.
Block Diagram
s 2 Regulated Outputs
Standby Output 5V
±2%; 100mA
Tracking Output 5V;
250mA
s Low Dropout Voltage
(0.4V at rated current)
s RESET Option
s ENABLE Option
s Low Quiescent Current
s Protection Features
Independent Thermal
Shutdown
Short Circuit
60V Load Dump
Reverse Battery
VIN
ENABLE
Gnd
Overvoltage
Shutdown
OVSD
Current
Limit
+
–
Bandgap
BG BG
VSTBY
5V,100mA,2%
RESET
VIN
Thermal
Shutdown
TSD
–
+
TSD OVSD
Current
Limit
–
+
VSTANDBY
BG
RESET
TSD OVSD
+
–
VTRK
250mA
Adj
RESET
* Consult factory for positive ENABLE option.
Rev. 5/4/99
1
Package Options
16 Lead PDIP & SOIC Wide
(internally fused leads)
VIN 1
NC
VTRK
Gnd
Gnd
Adj
NC
ENABLE
VSTBY
NC
NC
Gnd
Gnd
NC
NC
RESET
7L TO-220
7L D2PAK
1. VSTBY
2. VIN
3. VTRK
4. Gnd
1
5. Adj
6. ENABLE
7. RESET
1
Also available in 20 Lead SOIC Wide.
Consult factory for 20 Lead PSOP .
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: [email protected]
Web Site: www.cherry-semi.com
A Company
®
1 page  
Application Notes: continued
Heat Sinks
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.
Test & Application Circuits
B+ VIN VSTBY
0.1µF C1*
CS8361
RESET
R3
5V, 100mA
C2**
10µF
ESR<8Ω
VDD
MCU
RESET
ENABLE
Adj
R2
R1
Gnd
VTRK
C3**
SW 8V,
250mA
10µF
ESR<8Ω
I/O
Gnd
VTRK ~ VSTBY (1 + R1/R2)
For VTRK ~ 8V, R1/R2 ~ 0.6
* C1 is required if regulator is located far from power supply filter.
** C2 and C3 are required for stability.
Figure 2: 5V, 8V Regulator
B+
0.1µF
VIN VSTBY
C1*
CS8361
RESET
ENABLE
Adj
Gnd
VTRK
5V, 100mA
VDD
R1
C2**
10µF
ESR<8Ω
MCU
RESET
I/O
C3**
SW 5V,
250mA
10µF
ESR<8Ω
Gnd
* C1 is required if regulator is located far from power supply filter.
** C2 and C3 are required for stability.
Figure 3: Dual 5V Regulator
5
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| PDF Descargar | [ Datasheet CS8361YDPSR7.PDF ] | |
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