TS2938

500mA Ultra Low Dropout Voltage Regulator

with Inhibit Function

3/6

Version: D07

Electrical Characteristics (Continue)

Note 1: Absolute Maximum Rating is limits beyond which damage to the device may occur. For guaranteed

Specifications and test conditions see the Electrical Characteristics.

Note 2: Maximum positive supply voltage of 60V must be limited duration (<100mS) and duty cycle (<1%).

Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, Tj, the junction

to ambient thermal resistance, θja, and the ambient temperature, Ta. Exceeding the maximum allowable

power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. The

effective value of θja can be reduced by using a heatsink.

Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its

nominal value measured at 1V differential.

Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the

ground pin current and output load current.

Note 6: Output current will decrease with increasing temperature, but it will be not dropped below 500mA at the

maximum specified temperature.

Application Circuit

Application Information

Application

The TS2938 series is a high performance with low dropout voltage regulator suitable for moderate to high current

and voltage regulator application. Its 500Mv (typ) dropout voltage at full load and over temperature makes it

especially valuable in battery power systems and as high efficiency noise filters in post regulator applications. Unlike

normal NPN transistor design, where the base to emitter voltage drop and collector to emitter saturation voltage limit

the minimum dropout voltage, dropout performance of the PNP output of these devices is limited only by low Vce

saturation voltage.

The TS2938 series is fully protected from damage due to fault conditions. Linear current limiting is provided. Output

current during overload conditions is constant. Thermal shutdown the device when the die temperature exceeds the

maximum safe operating temperature. Transient protection allows device survival even when the input voltage

spikes above and below nominal. The output structure of these regulators allows voltages in excess of the desired

output voltage to be applied without reverse current flow.

Fixed Output Voltage Type