MCP1703T-1802E/CB Microchip Technology, MCP1703T-1802E/CB Datasheet - Page 12

• Manufacturer Part Number: MCP1703T-1802E/CB
• Description: IC REG LDO 1.8V 200MA SOT-23A
• Manufacturer: Microchip Technology

Specifications of MCP1703T-1802E/CB

• Package / Case: SOT-23A-3
• Regulator Topology: Positive Fixed
• Voltage - Output: 1.8V
• Voltage - Input: 2.7 ~ 16 V
• Number Of Regulators: 1
• Current - Output: 50mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 16 V
• Output Voltage: 1.8 V
• Output Type: Fixed
• Dropout Voltage (max): 0.65 V at 250 mA
• Output Current: 250 mA
• Line Regulation: 0.1 % / V
• Load Regulation: 1 %
• Voltage Regulation Accuracy: 2 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Primary Input Voltage: 2.7V
• Output Voltage Fixed: 1.8V
• Dropout Voltage Vdo: 650mV
• No. Of Pins: 3
• Voltage Regulator Case Style: SOT-23
• Operating Temperature Range: -40°C To
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MCP1703T-1802E/CBTR

MCP1703
5.0
The MCP1703 CMOS low dropout linear regulator is
intended for applications that need the lowest current
consumption
regulation. The operating continuous load range of the
MCP1703 is from 0 mA to 250 mA (V
input operating voltage range is from 2.7V to 16.0V,
making it capable of operating from two or more
alkaline cells or single and multiple Li-Ion cell batteries.
5.1
The input of the MCP1703 is connected to the source
of the P-Channel PMOS pass transistor. As with all
LDO circuits, a relatively low source impedance (10)
is needed to prevent the input impedance from causing
the LDO to become unstable. The size and type of the
capacitor needed depends heavily on the input source
type (battery, power supply) and the output current
range of the application. For most applications (up to
100 mA), a 1 µF ceramic capacitor will be sufficient to
ensure circuit stability. Larger values can be used to
improve circuit AC performance.
DS22049E-page 12
FUNCTIONAL DESCRIPTION
Input
while
maintaining
output
R
 2.5V). The
voltage
5.2
The maximum rated continuous output current for the
MCP1703 is 250 mA (V
where V
200 mA.
A minimum output capacitance of 1.0 µF is required for
small signal stability in applications that have up to
250 mA output current capability. The capacitor type
can be ceramic, tantalum, or aluminum electrolytic. The
esr range on the output capacitor can range from 0 to
2.0.
The output capacitor range for ceramic capacitors is
1 µF to 22 µF. Higher output capacitance values may
be used for tantalum and electrolytic capacitors. Higher
output capacitor values pull the pole of the LDO
transfer function inward that results in higher phase
shifts which in turn cause a lower crossover frequency.
The circuit designer should verify the stability by
applying line step and load step testing to their system
when using capacitance values greater than 22 µF.
5.3
When powering up the internal reference output, the
typical output rise time of 1000 µs is controlled to
prevent overshoot of the output voltage.
Output
R
Output Rise time
< 2.5V, the maximum output current is
 2010 Microchip Technology Inc.
R
 2.5V). For applications