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: 2.5V to 18V (absolute
maximum rating of 20V)
• Output voltage range VOUT:
– 0.8V to 13.0V (fixed, 100mV steps)
• Output current: Up to 1A
• Low quiescent current IQ:
– 60μA (typical, approximately 1.5μA in
shutdown)
• ±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:
– 4-pin, 6.5mm × 7mm SOT-223
– 3-pin, 6.6mm × 10.11mm TO-252

2 Applications
• Onboard chargers
• Traction inverters
• 2-wheeler & 3-wheeler traction drives

3 Description
The LM1117-Q1 is a AEC-Q100 qualified linear
voltage regulator for automotive applications that
provides improved performance compared to
traditional x1117 regulators with tighter output
accuracy and low quiescent current (IQ) to lower the
standby power consumption.
The LM1117-Q1 input voltage range is from 2.5V to
18V and provides an output voltage range from 0.8V
to 13V to support a wide variety of applications.
The wide bandwidth PSRR performance of the
LM1117-Q1 is typically greater than 60dB at 1kHz and
40dB at 1MHz, which helps attenuate the switching
frequency of an upstream DC/DC converter and
minimizes post regulator filtering.
Additionally, the LM1117-Q1 has an internal soft
start feature to reduce inrush current during start-up,
which can help save space and cost in a design
by minimizing input capacitance. The LM1117-Q1
features a foldback current limit that limits the power
dissipation of the device during high-load current
faults or shorting events.