MICROCHIP MCP1790-3302E/DB

The MCP1790/MCP1791 regulator provides up to 70 mA of current. The input operating voltage range is specified from 6.0 V to 30V continuous, 48V absolute max, making it ideal for automotive and commercial 12/24 VDC systems. The MCP1790/MCP1791 has a tight tolerance output voltage load regulation of ±0.2% (typical) and a very good line regulation at ±0.0002%/V (typical). The regulator output is stable with ceramic, tantalum, and electrolytic capacitors. The MCP1790/MCP1791 regulator incorporates both thermal and short circuit protection. The MCP1790 is the 3-pin version of the MCP1790/ MCP1791 family. The MCP1791 is the 5-pin version and incorporates a Shutdown input signal and a Power Good output signal. The regulator is specifically designed to operate in the automotive environment and will survive +48 V (43.5V ±10%) load dump transients and double-battery jumps. The device is designed to meet the stringent quiescent current requirements of the automotive industry. The device is also designed for the commercial low voltage fire alarm/detector systems which use 24 VDC to supply the required alarms throughout buildings. The low ground current, 110 μA (typ.), of the CMOS device will provide a power cost savings to the end users over similar bipolar devices. Typical buildings using hundreds of 24V powered fire and smoke detectors can see substantial savings on energy consumption and wiring gage reduction compared to bipolar regulators. The MCP1790 device will be offered in the 3-pin DD-PAK, and SOT-223 packages. The MCP1791 device will be offered in the 5-pin DD-PAK, and SOT-223 packages. The MCP1790/MCP1791 will have a junction temperature operating range of -40°C to +125°C

• 48V (43.5V ±10%) load dump protected for 180ms with a 30 second repetition rate (FORD Test Pulse G Loaded)
• Wide steady state supply voltage, 6.0 V - 30.0 V
• Extended Junction Temperature Range: -40 to +125°C
• Fixed output voltages: 3.0V, 3.3V, 5.0V
• Low quiescent current: 70 μA typical
• Low shutdown quiescent current: 10 μA typical
• Output Voltage Tolerances of ±2.5% over the temperature range
• Maximum output current of 70 mA @+125°C Junction Temperature
• Maximum continuous input voltage of 30V
• Internal thermal overload protection, +157°C (typical) Junction Temperature
• Internal short circuit current limit, 120 mA (typical) for +5 V option
• Short Circuit Current Foldback
• Shutdown Input option (MCP1791)
• Power Good Output option (MCP1791)
• High PSRR, -90 dB@100 Hz (typical)
• Stable with 1 μF to 1000 μF Tantalum and Electrolytic Capacitors
• Stable with 4.7 μF to 1000 μF Ceramic Capacitors

• Low Voltage A/C powered (24VAC) Fire Alarms, CO₂ Sensors, HVAC Controls
• Automotive Electronics
• Automotive Accessory Power Adapters
• Electronic Thermostat Controls
• Microcontroller power