SOT89-3EV-VREG Microchip Technology, SOT89-3EV-VREG Datasheet - Page 10

• Manufacturer Part Number: SOT89-3EV-VREG
• Description: BOARD EVAL SOT89-3 VOLTAGE REG
• Manufacturer: Microchip Technology

Specifications of SOT89-3EV-VREG

• Channels Per Ic: 1 - Single
• Regulator Type: Positive Fixed
• Board Type: Partially Populated
• Utilized Ic / Part: SOT-89-3 Package
• Silicon Manufacturer: Microchip
• Application Sub Type: Voltage Regulator
• Kit Application Type: Power Management - Voltage Regulator
• Silicon Core Number: MCP1700A, MCP1701A, MCP1702, MCP1703
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Output: -
• Voltage - Input: -
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP1701A
4.0
The MCP1701A is a low-quiescent current, precision,
fixed-output voltage LDO. Unlike bipolar regulators,
the MCP1701A supply current does not increase
proportionally with load current.
4.1
A minimum of 1 µF output capacitor is required. The
output capacitor should have an ESR greater than
0.1Ω and less than 5Ω, plus a resonant frequency
above 1 MHz. Larger output capacitors can be used to
improve supply noise rejection and transient response.
Care should be taken when increasing C
that the input impedance is not high enough to cause
high input impedance oscillation.
FIGURE 4-1:
DS21991C-page 10
DETAILED DESCRIPTION
Output Capacitor
V
IN
MCP1701A Block Diagram.
OUT
to ensure
Short Circuit
Reference
Protection
Voltage
GND
4.2
A 1 µF input capacitor is recommended for most
applications when the input impedance is on the order
of 10Ω. Larger input capacitance may be required for
stability when operating from a battery input, or if there
is a large distance from the input source to the LDO.
When large values of output capacitance are used, the
input capacitance should be increased to prevent high
source impedance oscillations.
4.3
The MCP1701 internal circuitry monitors the amount of
current flowing through the P-channel pass transistor.
In the event of a short circuit or excessive output
current, the MCP1701 will act to limit the output current.
+
–
Input Capacitor
Overcurrent
© 2007 Microchip Technology Inc.
V
OUT