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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1802 Datasheet

Low Quiescent Current LDO

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MCP1802
300 mA, High PSRR, Low Quiescent Current LDO
Features
• 300 mA Maximum Output Current
• Low Drop Out Voltage, 200 mV typical @ 100 mA
• 25 µA Typical Quiescent Current
• 0.01 µA Typical Shutdown Current
• Input Operating Voltage Range: 2.0V to10.0V
• Standard Output Voltage Options:
- (0.9V, 1.8V, 2.5V, 3.0V, 3.3V, 5.0V, 6.0V)
• Output voltage accuracy:
- ±2% (VR > 1.5V), ±30 mV (VR 1.5V)
• Stable with Ceramic output capacitors
• Current Limit Protection
• Shutdown pin
• High PSRR: 70 dB typical @ 10 kHz
Applications
• Battery-powered Devices
• Battery-powered Alarm Circuits
• Smoke Detectors
• CO2 Detectors
• Pagers and Cellular Phones
• Wireless Communications Equipment
• Smart Battery Packs
• Low Quiescent Current Voltage Reference
• PDAs
• Digital Cameras
• Microcontroller Power
• Solar-Powered Instruments
• Consumer Products
• Battery Powered Data Loggers
Related Literature
• AN765, “Using Microchip’s Micropower LDOs”,
DS00765, Microchip Technology Inc., 2002
• AN766, “Pin-Compatible CMOS Upgrades to
BiPolar LDOs”, DS00766,
Microchip Technology Inc., 2002
• AN792, “A Method to Determine How Much
Power a SOT23 Can Dissipate in an Application”,
DS00792, Microchip Technology Inc., 2001
Description
The MCP1802 is a family of CMOS low dropout (LDO)
voltage regulators that can deliver up to 300 mA of
current while consuming only 25 µA of quiescent
current (typical). The input operating range is specified
from 2.0V to 10.0V, making it an ideal choice for two to
six primary cell battery-powered applications, 9V alka-
line and one or two cell Li-Ion-powered applications.
The MCP1802 is capable of delivering 100 mA with
only 200 mV (typical) of input to output voltage differen-
tial (VOUT = 3.0V). The output voltage tolerance of the
MCP1802 at +25°C is typically ±0.4% with a maximum
of ±2%. Line regulation is ±0.01% typical at +25°C.
The LDO output is stable with a minimum of 1 µF of out-
put capacitance. Ceramic, tantalum or aluminum elec-
trolytic capacitors can all be used for input and output.
Overcurrent limit with current foldback provides short-
circuit protection. A shutdown (SHDN) function allows
the output to be enabled or disabled. When disabled,
the MCP1802 draws only 0.01 µA of current (typical).
The MCP1802 is available in a SOT-23-5 package.
Package Types
SOT-23-5
VOUT
NC
54
123
VIN VSS SHDN
© 2007 Microchip Technology Inc.
DS22053A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1802 Datasheet

Low Quiescent Current LDO

No Preview Available !

MCP1802
Functional Block Diagram
VIN
MCP1802
SHDN
Shutdown
Control
Voltage
Reference
+VIN
-
+
Current Limiter
Error Amplifier
+VIN
VOUT
GND
Typical Application Circuit
VIN
9V
Battery
+
CIN
1 µF
Ceramic
MCP1802
1 VIN VOUT 5
SOT-23-5
2 GND
3 SHDN NC 4
VOUT
3.3V @ 40 mA
COUT
1 µF Ceramic
DS22053A-page 2
© 2007 Microchip Technology Inc.


Part Number MCP1802
Description Low Quiescent Current LDO
Maker Microchip Technology
Total Page 24 Pages
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