MCP1702T-3302E/CB Microchip Technology, MCP1702T-3302E/CB Datasheet - Page 11
![IC REG LDO 3.3V 250MA SOT-23A](/photos/12/58/125843/mfg_mcp1703_sot-23a_sml.jpg)
MCP1702T-3302E/CB
Manufacturer Part Number
MCP1702T-3302E/CB
Description
IC REG LDO 3.3V 250MA SOT-23A
Manufacturer
Microchip Technology
Specifications of MCP1702T-3302E/CB
Package / Case
SOT-23A-3
Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 13.2V
Voltage - Dropout (typical)
0.525V @ 250mA
Number Of Regulators
1
Current - Output
250mA (Min)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
13.2 V
Output Voltage
3.3 V
Output Type
Fixed
Dropout Voltage (max)
0.725 V at 250 mA
Output Current
250 mA
Line Regulation
0.1 % / V
Load Regulation
1 %
Voltage Regulation Accuracy
0.4 %
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
GPIODM-KPLCD - BOARD DEMO LCD GPIO EXP KEYPAD
Current - Limit (min)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
MCP1702T-3302E/CB
MCP1702T-3302E/CBTR
MCP1702T-3302E/CBTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP1702T-3302E/CB
Manufacturer:
MICROCHIP
Quantity:
45 000
Company:
Part Number:
MCP1702T-3302E/CB
Manufacturer:
PIC/43
Quantity:
1 345
Part Number:
MCP1702T-3302E/CB
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
4.0
4.1
A portion of the LDO output voltage is fed back to the
internal error amplifier and compared with the precision
internal bandgap 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
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
FIGURE 4-1:
© 2006 Microchip Technology Inc.
DETAILED DESCRIPTION
Output Regulation
Overcurrent
V
IN
Block Diagram.
Overcurrent
Overtemperature
Voltage
Reference
GND
MCP1702
Error Amplifier
-
+
+V
device for a short period, after which the LDO will
attempt to restart. If the excessive current remains, the
cycle will repeat itself.
4.3
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,
IN
Overtemperature
MCP1702
V
OUT
DS22008A-page 11