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LM1117-Q1

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Automotive 1A 18V low-dropout (LDO) linear regulator with high power-supply rejection ratio

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Data sheet

LM1117-Q1

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Data sheet Order now

Product details

Output options Fixed Output Iout (max) (A) 1 Vin (max) (V) 18 Vin (min) (V) 2.5 Vout (max) (V) 12 Vout (min) (V) 1.2 Fixed output options (V) 1.2, 3.3, 5, 12 Rating Catalog Noise (µVrms) 60 PSRR at 100 KHz (dB) 53 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 67.2, 95 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Foldback Overcurrent protection, Foldback overcurrent protection Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 900 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 1 Vin (max) (V) 18 Vin (min) (V) 2.5 Vout (max) (V) 12 Vout (min) (V) 1.2 Fixed output options (V) 1.2, 3.3, 5, 12 Rating Catalog Noise (µVrms) 60 PSRR at 100 KHz (dB) 53 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 67.2, 95 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Foldback Overcurrent protection, Foldback overcurrent protection Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 900 Operating temperature range (°C) -40 to 125
SOT-223 (DCY) 4 45.5 mm² 6.5 x 7 TO-252 (KVU) 3 66.726 mm² 6.6 x 10.11
  • 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
  • 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

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.

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.
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* Data sheet LM1117-Q1 18V, 1A, Automotive Fixed Output Linear Voltage Regulator datasheet PDF | HTML 12 Dec 2024

Design & development

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Evaluation board

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The MLTLDO2EVM-037 multipackage low-dropout (LDO) evaluation module (EVM) allows design engineers to evaluate the operation and performance of several common packages of linear regulators for possible use in their own circuit application. This EVM configuration contains a DDA, 3-pin and 5-pin KVU, (...)

User guide: PDF
Not available on TI.com
Evaluation board

TLV1117LV33EVM-714 — TLV1117LV evaluation module for 1-A, fixed-voltage, LDO linear regulator

The TLV1117LV33EVM-714 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TLV1117LVxx device, which is a 1-A, positive fixed-voltage low-dropout (LDO) linear regulator.
User guide: PDF
Not available on TI.com
Package Pins CAD symbols, footprints & 3D models
SOT-223 (DCY) 4 Ultra Librarian
TO-252 (KVU) 3 Ultra Librarian
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