LM109QML

OBSOLETE

Military Grade 1A 5V Output Linear Regulator / LDO

Product details

Output options Fixed Output Iout (max) (A) 1 Vin (max) (V) 25 Vin (min) (V) 4.7 Vout (max) (V) 5 Vout (min) (V) 5 Fixed output options (V) 5 Rating Military Iq (typ) (mA) 10 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Dropout voltage (Vdo) (typ) (mV) 3000 Operating temperature range (°C) to
Output options Fixed Output Iout (max) (A) 1 Vin (max) (V) 25 Vin (min) (V) 4.7 Vout (max) (V) 5 Vout (min) (V) 5 Fixed output options (V) 5 Rating Military Iq (typ) (mA) 10 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Dropout voltage (Vdo) (typ) (mV) 3000 Operating temperature range (°C) to
TO-CAN (K) 2 989.0252 mm² 38.938 x 25.4
  • Specified to be Compatible, Worst Case, with TTL and DTL
  • Output Current in Excess of 1A
  • Internal Thermal Overload Protection
  • No External Components Required

All trademarks are the property of their respective owners.

  • Specified to be Compatible, Worst Case, with TTL and DTL
  • Output Current in Excess of 1A
  • Internal Thermal Overload Protection
  • No External Components Required

All trademarks are the property of their respective owners.

The LM109 series are complete 5V regulators fabricated on a single silicon chip. They are designed for local regulation on digital logic cards, eliminating the distribution problems association with single-point regulation. The devices are available in two standard transistor packages. In the solid-kovar PFM header, it can deliver output currents in excess of 200 mA, if adequate heat sinking is provided. With the TO power package, the available output current is greater than 1A.

The regulators are essentially blowout proof. Current limiting is included to limit the peak output current to a safe value. In addition, thermal shutdown is provided to keep the IC from overheating. If internal dissipation becomes too great, the regulator will shut down to prevent excessive heating.

Considerable effort was expended to make these devices easy to use and to minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response somewhat. Input bypassing is needed, however, if the regulator is located very far from the filter capacitor of the power supply. Stability is also achieved by methods that provide very good rejection of load or line transients as are usually seen with TTL logic.

Although designed primarily as a fixed-voltage regulator, the output of the LM109 series can be set to voltages above 5V, as shown. It is also possible to use the circuits as the control element in precision regulators, taking advantage of the good current-handling capability and the thermal overload protection.

The LM109 series are complete 5V regulators fabricated on a single silicon chip. They are designed for local regulation on digital logic cards, eliminating the distribution problems association with single-point regulation. The devices are available in two standard transistor packages. In the solid-kovar PFM header, it can deliver output currents in excess of 200 mA, if adequate heat sinking is provided. With the TO power package, the available output current is greater than 1A.

The regulators are essentially blowout proof. Current limiting is included to limit the peak output current to a safe value. In addition, thermal shutdown is provided to keep the IC from overheating. If internal dissipation becomes too great, the regulator will shut down to prevent excessive heating.

Considerable effort was expended to make these devices easy to use and to minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response somewhat. Input bypassing is needed, however, if the regulator is located very far from the filter capacitor of the power supply. Stability is also achieved by methods that provide very good rejection of load or line transients as are usually seen with TTL logic.

Although designed primarily as a fixed-voltage regulator, the output of the LM109 series can be set to voltages above 5V, as shown. It is also possible to use the circuits as the control element in precision regulators, taking advantage of the good current-handling capability and the thermal overload protection.

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* Data sheet LM109QML 5-Volt Regulator datasheet (Rev. A) 22 Apr 2013

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