LM/LM 5-Amp Adjustable Regulators. General Description. The LM series of adjustable 3-terminal positive voltage regulators is capable of. LM LM 5-Amp Adjustable Regulators. General Description. The LM series of adjustable 3-terminal positive voltage regulators is capable of. The LM is rated for −55˚C ≤ TJ ≤ +˚C, and the LM is rated for .. Reproduction of TI information in TI data books or data sheets is permissible only if.

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Control system wikipedialookup. In the LM this discharge path is through a large junction that is able to sustain 25A surge with no problem.

PDF LM338K Datasheet ( Hoja de datos )

Voltage regulator wikipedialookup. Under sustained loading conditions, the current limit decreases to a safe value protecting the regulator. Surge protector wikipedialookup.

The adjustment terminal can be bypassed to ground on the LM to improve ripple rejection. This allows the LM to be used with heavy transient loads and speeds start-up under full-load conditions.

Two-port network wikipedialookup. Please update your bookmarks. The LM voltage regulators can provide up to 1. Even small capacitors can have a low enough internal series resistance to be able to deliver 20A spikes when shorted. Mains electricity wikipedialookup.

Pulse-width modulation wikipedialookup. Careful circuit design has resulted in outstanding load and line regulation comparable to many commercial power supplies. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use lm338j such information nor for any infringement of patents or other rights of third parties which may results from its use.


No protection diodes are required for output voltages of less than 25V or greater than 10 uF capacitance. Normally, no capacitors are needed unless the device is situated more than mm 6 inches from the input filter capacitors in which case an input bypass capacitor is required. Figure 3 shows an LM with protection diodes ratasheet for use with outputs greater than 25V and high values of output capacitance.

See the voltage regulator datasheets above for specific details regarding the dropout voltage and lmm338k requirements.

Opto-isolator wikipedialookup. Besides replacing fixed regulators or discrete designs, the LM is useful in a wide variety of other applications. This occurs with values between pF and pF. Solid tantalum capacitors can be used on the voltage output to improve the ripple rejection dataxheet the voltage regulator. If there darasheet insufficient load on the output, the output will rise. Variable-frequency drive wikipedialookup.

Switched-mode power supply wikipedialookup. An optional output capacitor can be added to improve transient response. Schmitt trigger wikipedialookup. This bypass capacitor prevents ripple form being amplified as the output voltage is increased. For example, a 15V regulator with 0. Ohm’s law wikipedialookup. You don’t want to use too high an input voltage as the excess will need to be dissipated as heat through the regulator.



The discharge current depends on the value of the capacitor, the output voltage of the regulator, and the rate of decrease of VI. An input bypass capacitor is recommended.

Since the regulator is “floating” and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to input differential is not exceeded.

The bypass capacitor on the adjustment terminal can discharge through a low current junction. The current limit circuitry allows peak currents of up to 12A to be drawn from the regulator for short periods of time. An optional datashwet capacitor can be added to improve transient response. Solar micro-inverter wikipedialookup.

If the bypass capacitor is used, it is sometimes necessary to include protection diodes to prevent the capacitor from discharging through internal low current paths and damaging the device. Buck converter wikipedialookup.

LM / LM / LM Voltage Regulator Calculator and Circuits

In general, the best type of capacitors to use are solid tantalum. Solid tantalum capacitors have low impedance even at high frequencies. For this reason, 0. Islanding wikipedialookup. The dropout voltage of the IC regulator is about 1. The LM family is supplied ln338k a standard 3-lead transistor package.

Three-phase electric power wikipedialookup. Distribution management system wikipedialookup.