MCP1790/MCP1791
70 mA, High Voltage Regulator
Features General Description 48V (43.5V В±10%) load dump protected for <500 ms
with a 30 second repetition rate (FORD Test Pulse
G Loaded) Wide steady state supply voltage, 6.0V -30.0V Extended Junction Temperature Range:
-40 to +125В°C Fixed output voltages: 3.0V, 3.3V, 5.0V Low quiescent current: 70 ВµA typical Low shutdown quiescent current: 10 ВµA typical Output Voltage Tolerances of В±2.5% over the
temperature range Maximum output current of 70 mA @ +125В°C
Junction Temperature Maximum continuous input voltage of 30V Internal thermal overload protection, +157В°C
(typical) Junction Temperature Internal short circuit current limit, 120 mA (typical)
for +5V option Short Circuit Current Foldback Shutdown Input option (MCP1791) Power Good Output option (MCP1791) High PSRR, -90 dB@100 Hz (typical) Stable with 1 ВµF to 1000 ВµF Tantalum and
Electrolytic Capacitors Stable with 4.7 ВµF to 1000 ВµF Ceramic Capacitors The MCP1790/MCP1791 regulator provides up to 70 mA
of current. The input operating voltage range is specified
from 6.0V to 30V continuous, 48V absolute max, making
it ideal for automotive and commercial 12/24 VDC
systems. Applications Low Voltage A/C powered (24VAC) Fire Alarms,
CO2 Sensors, HVAC Controls Automotive Electronics Automotive Accessory Power Adapters Electronic Thermostat Controls Microcontroller power В© 2010 Microchip Technology Inc. The MCP1790/MCP1791 has a tight tolerance output
voltage load regulation of В±0.2% (typical) and a very
good line regulation at В±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/ …