TC1301B Microchip Technology, TC1301B Datasheet - Page 13

• Manufacturer Part Number: TC1301B
• Description: Dual LDO
• Manufacturer: Microchip Technology

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4.0
The descriptions of the pins are listed in Table 4-1.
TABLE 4-1:
4.1
The push-pull output pin is used to monitor the output
voltage (V
age, the RESET output will be held in the low state. As
V
remain in the low state for 300 ms and then change to
the high state, indicating that the voltage on V
above the threshold.
4.2
Connect V
capacitor and load. It is capable of 300 mA maximum
output current. For the TC1301B, V
ON and OFF using the SHDN1 input pin.
4.3
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).
4.4
By connecting an external 10 nF capacitor (typical) to
bypass, both outputs (V
noise and improved Power Supply Ripple Rejection
(PSRR) performance. The LDO output voltage start-up
time will increase with the addition of an external
bypass capacitor. By leaving this pin unconnected, the
start-up time will be minimized.
© 2005 Microchip Technology Inc.
OUT1
Pin No.
1
2
3
4
5
6
7
8
rises above the threshold, the RESET output will
TC1301B PIN DESCRIPTIONS
RESET Output Pin
Regulated Output Voltage #1
(V
Circuit Ground Pin (GND)
Reference Bypass Input
OUT1
OUT1
OUT1
). If V
RESET
SHDN2
SHDN1
Bypass
Name
V
V
to the positive side of the V
)
GND
TC1301B PIN FUNCTION TABLE
OUT1
OUT2
V
OUT1
IN
OUT1
is less than the threshold volt-
Push-pull output pin that will remain low while V
300 ms after V
Regulated output voltage #1 capable of 300 mA
Circuit ground pin
Internal reference bypass pin. A 10 nF external capacitor can be used to further reduce
output noise and improve PSRR performance
Output #2 shutdown control Input
Regulated output voltage #2 capable of 150 mA
Unregulated input voltage pin
Output #1 shutdown control input
and V
OUT2
OUT1
) will have less
can be turned
OUT1
OUT1
rises above the reset threshold
OUT1
is
4.5
ON/OFF control is performed by connecting SHDN2 to
its proper level. When this pin is connected to a voltage
less than 15% of V
connected to a voltage that is greater than 45% of V
V
4.6
Connect V
capacitor and load. This pin is capable of a maximum
output current of 150 mA. V
OFF using SHDN2.
4.7
Connect the unregulated input voltage source to V
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.
4.8
ON/OFF control is performed by connecting SHDN1 to
its proper level. When this pin is connected to a voltage
less than 15% of V
connected to a voltage that is greater than 45% of V
V
OUT2
OUT1
Function
will be turned ON.
will be turned ON.
Output Voltage #2 Shutdown
(SHDN2)
Regulated Output Voltage #2
(V
Unregulated Input Voltage Pin
(V
Output Voltage #1 Shutdown
(SHDN1)
OUT2
OUT2
IN
DET
)
is below the reset threshold and for
to the positive side of the V
)
IN
IN
, V
, V
OUT2
OUT1
TC1301A/B
OUT2
will be OFF. If this pin is
will be OFF. If this pin is
can be turned ON and
DS21798B-page 13
OUT2
IN
IN
. If
IN
,
,