MCP1702T-2802E/MB Microchip Technology, MCP1702T-2802E/MB Datasheet - Page 17
![IC REG LDO 2.8V 250MA SOT89-3](/photos/12/58/125851/c04-029_mb_sml.jpg)
MCP1702T-2802E/MB
Manufacturer Part Number
MCP1702T-2802E/MB
Description
IC REG LDO 2.8V 250MA SOT89-3
Manufacturer
Microchip Technology
Specifications of MCP1702T-2802E/MB
Regulator Topology
Positive Fixed
Voltage - Output
2.8V
Voltage - Input
Up to 13.2V
Voltage - Dropout (typical)
0.625V @ 250mA
Number Of Regulators
1
Current - Output
250mA (Min)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SC-62, SOT-89, TO-243 (3 Leads + Tab)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
MCP1702T-2802E/MBTR
Available stocks
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Manufacturer
Quantity
Price
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5.0
The MCP1702 CMOS LDO linear regulator is intended
for
consumption
regulation. The operating continuous load range of the
MCP1702 is from 0 mA to 250 mA (V
input operating voltage range is from 2.7V to 13.2V,
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 MCP1702 is connected to the source
of the P-Channel PMOS pass transistor. As with all
LDO circuits, a relatively low source impedance (10Ω)
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.
© 2009 Microchip Technology Inc.
applications
FUNCTIONAL DESCRIPTION
Input
while
that
maintaining
need
the
output
lowest
R
≥ 2.5V). The
voltage
current
5.2
The maximum rated continuous output current for the
MCP1702 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 0Ω to
2.0Ω.
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 500 µs is controlled to
prevent overshoot of the output voltage. There is also a
startup delay time that ranges from 300 µs to 800 µs
based on loading. The startup time is separate from
and precedes the Output Rise Time. The total output
delay is the Startup Delay plus the Output Rise time.
Output
R
Output Rise Time
< 2.5V, the maximum output current is
R
≥ 2.5V). For applications
MCP1702
DS22008D-page 17