IC REG LDO 3.3V 250MA TO-92-3

MCP1702-3302E/TO

Manufacturer Part NumberMCP1702-3302E/TO
DescriptionIC REG LDO 3.3V 250MA TO-92-3
ManufacturerMicrochip Technology
MCP1702-3302E/TO datasheets
 


Specifications of MCP1702-3302E/TO

Package / CaseTO-92-3 (Standard Body), TO-226Regulator TopologyPositive Fixed
Voltage - Output3.3VVoltage - InputUp to 13.2V
Voltage - Dropout (typical)0.525V @ 250mANumber Of Regulators1
Current - Output250mA (Min)Operating Temperature-40°C ~ 125°C
Mounting TypeThrough HoleNumber Of Outputs1
PolarityPositiveInput Voltage Max13.2 V
Output Voltage3.3 VOutput TypeFixed
Dropout Voltage (max)0.725 V at 250 mAOutput Current250 mA
Line Regulation0.1 % / VLoad Regulation1 %
Voltage Regulation Accuracy0.4 %Maximum Operating Temperature+ 125 C
Mounting StyleThrough HoleMinimum Operating Temperature- 40 C
Primary Input Voltage4.03VOutput Voltage Fixed3.3V
Dropout Voltage Vdo625mVNo. Of Pins3
Voltage Regulator Case StyleTO-92Operating Temperature Range-40°C To +125°C
Rohs CompliantYesLead Free Status / RoHS StatusLead free / RoHS Compliant
For Use WithGPIODM-KPLCD - BOARD DEMO LCD GPIO EXP KEYPADCurrent - Limit (min)-
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MCP1702
4.0
DETAILED DESCRIPTION
4.1
Output Regulation
A portion of the LDO output voltage is fed back to the
internal error amplifier and compared with the precision
internal band gap reference. The error amplifier output
will adjust the amount of current that flows through the
P-Channel pass transistor, thus regulating the output
voltage to the desired value. Any changes in input
voltage or output current will cause the error amplifier
to respond and adjust the output voltage to the target
voltage (refer to
Figure
4-1).
4.2
Overcurrent
The MCP1702 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 MCP1702 will turn off the P-Channel
device for a short period, after which the LDO will
attempt to restart. If the excessive current remains, the
cycle will repeat itself.
V
IN
Overcurrent
Overtemperature
FIGURE 4-1:
Block Diagram.
DS22008E-page 12
4.3
Overtemperature
The internal power dissipation within the LDO is a
function of input-to-output voltage differential and load
current. If the power dissipation within the LDO is
excessive, the internal junction temperature will rise
above the typical shutdown threshold of 150°C. At that
point, the LDO will shut down and begin to cool to the
typical turn-on junction temperature of 130°C. If the
power dissipation is low enough, the device will
continue to cool and operate normally. If the power
dissipation remains high, the thermal shutdown
protection circuitry will again turn off the LDO,
protecting it from catastrophic failure.
MCP1702
Error Amplifier
+V
IN
Voltage
-
Reference
+
GND
V
OUT
 2010 Microchip Technology Inc.