1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
– Junction temperature: –40°C to +150°C, TJ
• Input voltage range VIN:
– Absolute maximum: 20V
– Operating range: 2.5V to 18V
• Output voltage range VOUT:
– 1.2V, 3.3V, 5V, 12V fixed
– 0.8V to 13.0V (fixed, 100mV steps) available
upon request
• Output current: Up to 1A
• Low quiescent current IQ: 65μA (typical)
• ±1% output accuracy
• High PSRR:
– 60dB at 1kHz
– 40dB at 1MHz
• Internal soft-start time: 500μs (typical)
• Foldback current limiting and thermal protection
• Stable with 1μF ceramic output capacitors
• Packages:
– SOT-223 (DCY), RθJA= 95.4°C/W
– TO-252 (KVU), RθJA= 67.2°C/W

2 Applications
• Onboard chargers
• Traction inverters
• 2-wheeler and 3-wheeler traction drives
• DC/DC converter systems

3 Description
The LM1117-Q1 is an AEC-Q100 qualified linear
voltage regulator for automotive applications. The
device provides improved performance compared
to traditional x1117 regulators, with tighter output
accuracy and low quiescent current (IQ) to minimize
standby power consumption.
The LM1117-Q1 input voltage range is from 2.5V to
18V (20V absolute maximum). The device is available
in 1.2V, 3.3V, 5V, and 12V fixed output voltages.
The wide bandwidth PSRR performance of the
LM1117-Q1 is typically greater than 60dB at 1kHz
and 40dB at 1MHz, which attenuates the switching
frequency of an upstream DC/DC converter.
Additionally, the LM1117-Q1 has an internal soft-start
feature to reduce inrush current during start-up, which
helps save space and cost in a design by minimizing
the need for input capacitance. The LM1117-Q1
features a foldback current limit that reduces the
power dissipation of the device during high-load
current faults or shorting events.