MCP1703 Microchip Technology, MCP1703 Datasheet - Page 10

• Manufacturer Part Number: MCP1703
• Description: 250 mA, 16V, Low Quiescent Current
• Manufacturer: Microchip Technology

MCP1703
3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
Regulator ground. Tie GND to the negative side of the
output and the negative side of the input capacitor.
Only the LDO bias current (2.0 µA typical) flows out of
this pin; there is no high current. The LDO output
regulation is referenced to this pin. Minimize voltage
drops between this pin and the negative side of the
load.
3.2
Connect V
positive terminal of the output capacitor. The positive
side of the output capacitor should be physically
located as close to the LDO V
The current flowing out of this pin is equal to the DC
load current.
DS22049A-page 10
SOT-223-3
Pin No.
2
3
1
PIN DESCRIPTIONS
Ground Terminal (GND)
Regulated Output Voltage (V
OUT
to the positive side of the load and the
MCP1703 PIN FUNCTION TABLE
SOT-23A
Pin No.
1
2
3
-
OUT
SOT-89-3
Pin No.
pin as is practical.
2,Tab
1
3
-
Table
OUT
3-1.
)
Name
V
GND
V
NC
OUT
IN
3.3
Connect V
Like all low dropout linear regulators, low source
impedance is necessary for the stable operation of the
LDO. The amount of capacitance required to ensure
low source impedance will depend on the proximity of
the input source capacitors or battery type. For most
applications, 1 µF of capacitance will ensure stable
operation of the LDO circuit. For applications that have
load currents below 100 mA, the input capacitance
requirement can be lowered. The type of capacitor
used can be ceramic, tantalum or aluminum electro-
lytic. The low ESR characteristics of the ceramic will
yield better noise and PSRR performance at high-
frequency.
Ground Terminal
Regulated Voltage Output
Unregulated Supply Voltage
No connection
Unregulated Input Voltage (V
IN
to the input unregulated source voltage.
Function
© 2007 Microchip Technology Inc.
IN
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