MCP1790 datasheet(1/34 Pages) MICROCHIP

tên linh kiện	MCP1790

Giải thích chi tiết về linh kiện	70 mA, High Voltage Regulator

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DS22075A-page 1

MCP1790/MCP1791

Features

• 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, 6.0V - 30.0V

• 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 +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 µF to 1000 µF Tantalum and

Electrolytic Capacitors

• Stable with 4.7 µF to 1000 µF Ceramic Capacitors

Applications

• Low Voltage A/C powered (24VAC) Fire Alarms,

CO2 Sensors, HVAC Controls

• Automotive Electronics

• Automotive Accessory Power Adapters

• Electronic Thermostat Controls

• Microcontroller power

General Description

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.

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 regu-

lator output is stable with ceramic, tantalum, and elec-

trolytic 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 +48V (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 sup-

ply 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 hun-

dreds 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 tempera-

ture operating range of -40°C to +125°C.

70 mA, High Voltage Regulator

Số phần tương tự - MCP1790

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