GSCLP2950

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ISSUED DATE :2005/11/30

REVISED DATE :

Note 1: Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature

range.

Note 2: Unless otherwise specified all limits guaranteed for Tj=25 : , Vin =Vo+1V, IL=100uA and CL=1uF. Additional conditions are

feedback tied to GSCLP2951-XX tap and output tied to Sense (Vout=XX V) and Vshutdown 0.8V.

Note 3: Regulations is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage

due to heating effects are covered under the specification for thermal regulation.

Note 4: Line regulation for GSCLP2951-XX is tested at 150 : for IL=1mA. For IL=100uA and Tj=125 : , line regulation is guaranteed by

design to 0.2%. See typical performance characteristics for line regulation versus temperature and load current.

Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value

measured at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over

temperature) must be taken into account.

Note 6: Vref Vout (Vin-1V), 2.3V Vin 30V, 100uA IL 100mA, Tj Tjmax.

Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference

voltage measured at Vo + 1V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier

gain = Vout/Vref = (R1+R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when

the output drops by 95mV x 5V/1.235V=384mV. Thresholds remain constant as a percent of Vout as Vout is varied, with the

dropout warning occurring at typical 5% below nominal, 7.5% guaranteed.

Note 8: Vshutdown 2V, Vin 30V, Vout=0, Feed-back pin tied to –XX V Tap.

Characteristics Curve

Fig 3. Dropout Voltage

Fig 4. Ground Pin Current

Fig 1. Dropout Characteristics

Fig 2. Input Current