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TC1302A Datasheet(PDF) 11 Page - Microchip Technology

Part # TC1302A
Description  Low Quiescent Current Dual Output LDO
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1302A Datasheet(HTML) 11 Page - Microchip Technology

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 2003-2012 Microchip Technology Inc.
DS21333C-page 11
TC1302A/B
4.0
TC1302B PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 4-1.
TABLE 4-1:
TC1302B PIN FUNCTION TABLE
4.1
Regulated Output Voltage #1
(VOUT1)
Connect VOUT1 to the positive side of the VOUT1
capacitor and load. Capable of 300 mA maximum
output current. For the TC1302B, VOUT1 can be turned
ON and OFF using the SHDN1 input pin.
4.2
Circuit Ground Pin (GND)
Connect GND to the negative side of the input and
output capacitor. Only the LDO internal circuitry bias
current flows out of this pin (200 µA maximum).
4.3
Reference Bypass Input
By connecting an external 10 nF capacitor (typical) to
the bypass input, both outputs (VOUT1 and VOUT2) will
have less noise and improved Power Supply Ripple
Rejection (PSRR) performance. The LDO output
voltage startup time will increase with the addition of an
external
bypass
capacitor.
By
leaving
this
pin
unconnected, the startup time will be minimized.
4.4
Output Voltage #2 Shutdown
(SHDN2)
ON/OFF control is performed by connecting SHDN2 to
its proper level. When this pin is connected to a voltage
less than 15% of VIN, VOUT2 will be OFF. If this pin is
connected to a voltage that is greater than 45% of VIN,
VOUT2 will be turned ON.
4.5
Regulated Output Voltage #2
(VOUT2)
Connect VOUT2 to the positive side of the VOUT2
capacitor and load. This pin is capable of a maximum
output current of 150 mA. VOUT2 can be turned ON and
OFF using SHDN2.
4.6
Unregulated Input Voltage Pin
(VIN)
Connect the unregulated input voltage source to VIN. If
the input voltage source is located more than several
inches away, or is a battery, a typical minimum input
capacitance of 1 µF and 4.7 µF is recommended.
4.7
Output Voltage #1 Shutdown
(SHDN1)
ON/OFF control is performed by connecting SNDN1 to
its proper level. When this pin is connected to a voltage
less than 15% of VIN, VOUT1 will be OFF. If this pin is
connected to a voltage that is greater than 45% of VIN,
VOUT1 will be turned ON.
Pin No.
Name
Function
1
NC
No connect.
2VOUT1
Regulated output voltage #1, capable of 300 mA.
3
GND
Circuit ground pin.
4
Bypass
Internal reference bypass pin. A 10 nF external capacitor can be used to further reduce
output noise and improve PSRR performance.
5
SHDN2
Output #2 shutdown control input.
6VOUT2
Regulated output voltage #2, capable of 150 mA.
7VIN
Unregulated Input voltage pin.
8
SHDN1
Output #1 shutdown control input.


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