MCP1802T-1802I/OT Microchip Technology, MCP1802T-1802I/OT Datasheet - Page 11

• Manufacturer Part Number: MCP1802T-1802I/OT
• Description: IC REG LDO 300MA 1.8V SOT23-5
• Manufacturer: Microchip Technology

Specifications of MCP1802T-1802I/OT

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.8V
• Voltage - Input: 2 ~ 10 V
• Number Of Regulators: 1
• Current - Output: 300mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Primary Input Voltage: 10V
• Output Voltage Fixed: 1.8V
• Dropout Voltage Vdo: 200mV
• No. Of Pins: 5
• Output Current: 300mA
• Operating Temperature Range: -40°C To +85°C
• Termination Type: SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Current - Limit (min): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: MCP1802T-1802I/OT; MCP1802T-1802I/OTTR

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
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, 0.1 µF of capacitance will ensure stable
operation of the LDO circuit. The type of capacitor used
can be ceramic, tantalum or aluminum electrolytic. The
low ESR characteristics of the ceramic will yield better
noise and PSRR performance at high frequency.
3.2
Regulator ground. Tie GND to the negative side of the
output and the negative side of the input capacitor.
Only the LDO bias current (25 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.
 2010 Microchip Technology Inc.
SOT-23-5
Pin No.
1
2
3
4
5
PIN DESCRIPTIONS
Unregulated Input Voltage (V
Ground Terminal (GND)
IN
to the input unregulated source voltage.
PIN FUNCTION TABLE
SHDN
Name
V
GND
V
NC
OUT
IN
Unregulated Supply Voltage
Ground Terminal
Shutdown
No connection
Regulated Voltage Output
Table
3-1.
IN
)
3.3
The SHDN input is used to turn the LDO output voltage
on and off. When the SHDN input is at a logic-high
level, the LDO output voltage is enabled. When the
SHDN input is pulled to a logic-low level, the LDO
output voltage is disabled and the LDO enters a low
quiescent current shutdown state where the typical
quiescent current is 0.01 µA. The SHDN pin does not
have an internal pull-up or pull-down resistor. The the
SHDN pin must be connected to either V
prevent the device from becoming unstable.
3.4
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.
Function
Shutdown Input (SHDN)
Regulated Output Voltage (V
OUT
to the positive side of the load and the
MCP1802
OUT
pin as is practical.
DS22053C-page 11
IN
or GND to
OUT
)