Microchip MCP1802 Handleiding

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 2010 Microchip Technology Inc.DS22053C-page 1

MCP1802

Features:

•300 mA Maximum Output Current

•Low Dropout Voltage, 200mV typical @ 100 mA

•25µA 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), ±30mV (VR 1.5V)

•Stable with Ceramic output capacitors

•Current Limit Protection

•Shutdown pin

•High PSRR: 70dB typical @ 10kHz

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

alkaline 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

differential (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

output capacitance. Ceramic, tantalum or aluminum

electrolytic 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

123

5 4

VOUT NC

VIN SHDNVSS

300 mA, High PSRR, Low Quiescent Current LDO

Product specificaties