1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: -40°C to 125°C, TJ

• Input voltage range (VIN) (M3 version): 5.3V to 30V

• Absolute maximum input voltage:

– Non-M3 version only: 35V

– M3 version only: 45V

• Output voltage (VOUT): 3.3V and 5V

• Output current (IOUT): Up to 500mA

• Built-in, short-circuit current limiting and thermal

protection

• Stable without any external components

• Package:

– DCY (4-pin SOT-223), RθJA: 77.7°C/W

2 Applications

• Onboard charging

• Traction inverters

• Starters and generators

3 Description

The UA78M-Q1 fixed-voltage, integrated-circuit

voltage regulator is designed for a wide range of

applications. The UA78M-Q1 also functions with

power-pass transistors to make high-current voltage

regulators. The UA78M-Q1 delivers up to 500mA of

output current. Additionally, the UA78M-Q1 does not

need an external capacitor for stable operation across

the load current range. The internal current-limiting

and thermal shutdown features of this regulator help

protect the device from overload.

The UA78M-Q1 is characterized for the junction

temperature range of –40°C to +125°C. See the

Device Nomenclature table for more details.