MCP1802

Features:

• 300 mA Maximum Output Current
• Low Drop Out Voltage, 200 mV typical @ 100 mA
• 25 A Typical Quiescent Current
• 0.01 A 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% (V_R > 1.5V), ±30 mV (V_R < 1.5V)
• Stable with Ceramic output capacitors
• Current Limit Protection
• Shutdown pin
• High PSRR: 70 dB typical @ 10 kHz




Application

• 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




Specifications

Parameter NameValueMax Input Voltage10Output Voltage (v)0.9, 1.2, 1.8, 2.5, 3.0, 3.3, 5.0, 6.0Typical Active Current (A)25Typical Dropout Voltage @ Max. lout (mV)800Typical Output Voltage Accuracy (%)2Output Capacitor TypeCeramic/Aluminum/Tantalum

Input Voltage .............................................................. +12V
Output Current (Continuous) ................... PD/(V_IN-V_OUT)mA
Output Current (Peak) ............................................. 500 mA
Output Voltage .............................. (V_SS-0.3V) to (V_IN+0.3V)
SHDNVoltage..................................(V_SS-0.3V) to (V_IN+0.3V)
Continuous Power Dissipation:
5-Pin SOT-23-5 .................................................... 250 mW




Description

The MCP1802 is a 300 mA, high PSRR, ceramic output capacitor stable Low Dropout (LDO) voltage regulator with shutdown. MCP1802 provides a low noise, highly stable output due to its excellent transient response while consuming only 25 A of quiescent current. MCP1802's overcurrent limit with current foldback providesshort-circuit protection.

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 A 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 (V_OUT = 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 F of output capacitance. Ceramic, tantalum or aluminum electrolytic capacitors can all be used for input and output. Overcurrent limit with current foldback provides shortcircuit protection. A shutdown (SHDN) function allows the output to be enabled or disabled. When disabled, the MCP1802 draws only 0.01 A of current (typical).

The MCP1802 is available in a SOT-23-5 package.