LM123QML

OBSOLETE

Military Grade 3A 5V Output Linear Regulator / LDO

Product details

Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 20 Vin (min) (V) 7.5 Vout (max) (V) 5 Vout (min) (V) 5 Fixed output options (V) 5 Iq (typ) (mA) 20 Rating Military Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) to
Output options Fixed Output Iout (max) (A) 3 Vin (max) (V) 20 Vin (min) (V) 7.5 Vout (max) (V) 5 Vout (min) (V) 5 Fixed output options (V) 5 Iq (typ) (mA) 20 Rating Military Load capacitance (min) (µF) 0.1 Regulated outputs (#) 1 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) to
TO-CAN (K) 2 989.0252 mm² 38.938 x 25.4
  • 3 Amp Output Current
  • Internal Current and Thermal Limiting
  • 0.01Ω Typical Output Impedance
  • 7.5V Minimum Input Voltage
  • 30W Power Dissipation

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  • 3 Amp Output Current
  • Internal Current and Thermal Limiting
  • 0.01Ω Typical Output Impedance
  • 7.5V Minimum Input Voltage
  • 30W Power Dissipation

All trademarks are the property of their respective owners.

The LM123 is a three-terminal positive regulator with a preset 5V output and a load driving capability of 3 amps. New circuit design and processing techniques are used to provide the high output current without sacrificing the regulation characteristics of lower current devices.

The 3 amp regulator is virtually blowout proof. Current limiting, power limiting, and thermal shutdown provide the same high level of reliability obtained with these techniques in the LM109 1 amp regulator.

No external components are required for operation of the LM123. If the device is more than 4 inches from the filter capacitor, however, a 1 μF solid tantalum capacitor should be used on the input. A 0.1 μF or larger capacitor may be used on the output to reduce load transient spikes created by fast switching digital logic, or to swamp out stray load capacitance.

An overall worst case specification for the combined effects of input voltage, load currents, ambient temperature, and power dissipation ensure that the LM123 will perform satisfactorily as a system element.

For applications requiring other voltages, see LM150 series adjustable regulator data sheet.

The LM123 is a three-terminal positive regulator with a preset 5V output and a load driving capability of 3 amps. New circuit design and processing techniques are used to provide the high output current without sacrificing the regulation characteristics of lower current devices.

The 3 amp regulator is virtually blowout proof. Current limiting, power limiting, and thermal shutdown provide the same high level of reliability obtained with these techniques in the LM109 1 amp regulator.

No external components are required for operation of the LM123. If the device is more than 4 inches from the filter capacitor, however, a 1 μF solid tantalum capacitor should be used on the input. A 0.1 μF or larger capacitor may be used on the output to reduce load transient spikes created by fast switching digital logic, or to swamp out stray load capacitance.

An overall worst case specification for the combined effects of input voltage, load currents, ambient temperature, and power dissipation ensure that the LM123 will perform satisfactorily as a system element.

For applications requiring other voltages, see LM150 series adjustable regulator data sheet.

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Technical documentation

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Type Title Date
* Data sheet LM123QML 3-Amp, 5-Volt Positive Regulator datasheet (Rev. A) 22 Apr 2013
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Application note AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) 06 May 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 06 May 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 05 May 2013
Application note Packaging Limits Range of Linear Regulators 08 May 2010
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 04 Jun 2008
Application note Understanding the Terms and Definitions of LDO Voltage Regulators 21 Oct 1999

Design & development

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TO-CAN (K) 2 View options

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