MCP1754 Microchip Technology Inc., MCP1754 Datasheet - Page 15

• Manufacturer Part Number: MCP1754
• Description: 150 Ma, 16v, High Performance Ldo
• Manufacturer: Microchip Technology Inc.

3.0
The descriptions of the pins are listed in
TABLE 3-1:
TABLE 3-2:
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 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.
© 2011 Microchip Technology Inc.
SOT223-5
SOT223-3
Pin No.
Pin No.
EP
EP
—
—
3
4
2
5
1
2
3
1
PIN DESCRIPTIONS
Ground Terminal (GND)
Regulated Output Voltage (V
OUT
to the positive side of the load and the
MCP1754 PIN FUNCTION TABLE
MCP1754S PIN FUNCTION TABLE
SOT23-5
SOT23A
Pin No.
Pin No.
—
—
—
—
2
5
1
4
3
1
2
3
OUT
2X3 DFN
pin as is practical.
Pin No.
Pin No.
SOT89
3,6,7
EP
EP
—
4
1
8
2
5
2
3
1
Table 3-1
OUT
and
)
2X3 DFN
PWRGD
2,3,5,6,7
Pin No.
Name
SHDN
V
GND
GND
V
NC
EP
OUT
Table
4
1
8
IN
3-2.
MCP1754/MCP1754S
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. The input capacitor should
have a capacitance value equal to or larger than the
output capacitor for performance applications. The
input capacitor will supply the load current during
transients and improve performance. For applications
that have load currents below 10 mA, the input
capacitance requirement can be lowered. The type of
capacitor used may be ceramic, tantalum or aluminum
electrolytic. 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
Open Drain Power Good Output
Shutdown Input
Exposed Pad, Connected to GND
Name
V
GND
GND
V
NC
OUT
IN
Unregulated Input Voltage (V
IN
to the input unregulated source voltage.
Ground Terminal
Regulated Voltage Output
Unregulated Supply Voltage
No Connection
Exposed Pad, Connected to GND
Function
Function
DS22276A-page 15
IN
)