LM338-MIL

現行

5A 可調式輸出線性穩壓器

產品詳細資料

Output options Adjustable Output Iout (max) (A) 5 Vin (max) (V) 40 Vin (min) (V) 4.2 Vout (max) (V) 32 Vout (min) (V) 1.24 Rating Military Noise (µVrms) 37 PSRR at 100 KHz (dB) 10 Iq (typ) (mA) 0.045 Thermal resistance θJA (°C/W) 23 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 3.5 Dropout voltage (Vdo) (typ) (mV) 2700 Operating temperature range (°C) 0 to 0
Output options Adjustable Output Iout (max) (A) 5 Vin (max) (V) 40 Vin (min) (V) 4.2 Vout (max) (V) 32 Vout (min) (V) 1.24 Rating Military Noise (µVrms) 37 PSRR at 100 KHz (dB) 10 Iq (typ) (mA) 0.045 Thermal resistance θJA (°C/W) 23 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 3.5 Dropout voltage (Vdo) (typ) (mV) 2700 Operating temperature range (°C) 0 to 0
TO-CAN (NDS) 2 969.2166 mm² 38.94 x 24.89
  • Specified 7-A Peak Output Current
  • Specified 5-A Output Current
  • Adjustable Output Down to 1.2 V
  • Specified Thermal Regulation
  • Current Limit Constant With Temperature
  • P + Product Enhancement Tested
  • Output is Short-Circuit Protected
  • Specified 7-A Peak Output Current
  • Specified 5-A Output Current
  • Adjustable Output Down to 1.2 V
  • Specified Thermal Regulation
  • Current Limit Constant With Temperature
  • P + Product Enhancement Tested
  • Output is Short-Circuit Protected

The LM338-MIL series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5 A over a 1.2-V to 32-V output range. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Careful circuit design has resulted in outstanding load and line regulation, comparable to many commercial power supplies. The LM338-MIL family is supplied in a standard 3-lead transistor package.

A unique feature of the LM338-MIL family is time-dependent current limiting. The current limit circuitry allows peak currents of up to 12 A to be drawn from the regulator for short periods of time. This allows the LM338-MIL to be used with heavy transient loads and speeds start-up under full-load conditions. Under sustained loading conditions, the current limit decreases to a safe value protecting the regulator. Also included on the chip are thermal overload protection and safe area protection for the power transistor. Overload protection remains functional even if the adjustment (ADJ) pin is accidentally disconnected.

Normally, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed. An output capacitor can be added to improve transient response, while bypassing the adjustment pin increases the ripple rejection of the regulator.

Besides replacing fixed regulators or discrete designs, the LM338-MIL is useful in a wide variety of other applications. Because the regulator is floating and receives only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded; do not short-circuit output to ground. The part numbers in the LM338-MIL series which have a K suffix are packaged in a standard steel TO-CAN package, while those with a T suffix are packaged in a TO-220 plastic package. The LM338-MIL is rated for TJ = –55°C to 150°C, and the LM338-MIL is rated for TJ = 0°C to 125°C.

The LM338-MIL series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 5 A over a 1.2-V to 32-V output range. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Careful circuit design has resulted in outstanding load and line regulation, comparable to many commercial power supplies. The LM338-MIL family is supplied in a standard 3-lead transistor package.

A unique feature of the LM338-MIL family is time-dependent current limiting. The current limit circuitry allows peak currents of up to 12 A to be drawn from the regulator for short periods of time. This allows the LM338-MIL to be used with heavy transient loads and speeds start-up under full-load conditions. Under sustained loading conditions, the current limit decreases to a safe value protecting the regulator. Also included on the chip are thermal overload protection and safe area protection for the power transistor. Overload protection remains functional even if the adjustment (ADJ) pin is accidentally disconnected.

Normally, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed. An output capacitor can be added to improve transient response, while bypassing the adjustment pin increases the ripple rejection of the regulator.

Besides replacing fixed regulators or discrete designs, the LM338-MIL is useful in a wide variety of other applications. Because the regulator is floating and receives only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded; do not short-circuit output to ground. The part numbers in the LM338-MIL series which have a K suffix are packaged in a standard steel TO-CAN package, while those with a T suffix are packaged in a TO-220 plastic package. The LM338-MIL is rated for TJ = –55°C to 150°C, and the LM338-MIL is rated for TJ = 0°C to 125°C.

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* Data sheet LM338-MIL 5-Amp Adjustable Regulators datasheet PDF | HTML 2017年 8月 28日

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