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MIC5200_05 Datasheet, PDF (4/10 Pages) Micrel Semiconductor – 100mA Low-Dropout Regulator | |||
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MIC5200
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Micrel, Inc.
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical speciï¬cations do
not apply when operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a
function of the maximum junction temperature, TJ , (MAX) the junction-to-ambient thermal resistance, θJA, and the ambient tem-
perature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P(MAX) = (TJ(MAX) â TA)
÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go
into thermal shutdown. The θJC of the MIC5200-xxBS is 15°C/W and θJA for the MIC5200BM is 160°C/W mounted on a PC
board (see âThermal Considerationsâ section for further details).
Output voltage temperature coefï¬cient is deï¬ned as the worst case voltage change divided by the total temperature
range.
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regula-
tion in the load range from 0.1mA to 100mA. Changes in output voltage due to heating effects are covered by the thermal
regulation speciï¬cation.
Dropout Voltage is deï¬ned as the input to output differential at which the output voltage drops 2% below its nominal value
measured at 1V differential.
Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the
supply is the sum of the load current plus the ground pin current.
Thermal regulation is deï¬ned as the change in output voltage at a time t after a change in power dissipation is applied,
excluding load or line regulation effects. Speciï¬cations are for a 100mA load pulse at VIN = 26V for t = 10ms.
April 2005
4
M9999-040805
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