MIC5202 查看數據表（PDF） - Micrel
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MIC5202 Datasheet PDF : 7 Pages
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MIC5202
Note 1:
Note 2:
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Note 6:
Micrel
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications 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) – TA)
/ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will
go into thermal shutdown. The junction to ambient thermal resistance of the MIC5202BM is 160°C/W mounted on a PC
board.
Output voltage temperature coefficient is defined 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 specification.
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.
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 defined as the change in output voltage at a time t after a change in power dissipation is applied, ex-
cluding load or line regulation effects. Specifications are for a 100mA load pulse at VIN = 26V for t = 10ms, and is measured
Typical Characteristics (Each Regulator—2 Regulators/Package)
Dropout Voltage
vs. Output Current
250
200
150
100
50
0
0.01 0.1 1 10 100 1000
OUTPUT CURRENT (mA)
Dropout Voltage
vs. Temperature
0.4
0.3
IL = 100mA
0.2
0.1
IL = 1mA
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Ground Current
vs. Output Current
10
1
0.1
0.01 0.1
1
10 100
OUTPUT CURRENT (mA)
Ground Current
vs. Supply Voltage
1.6
1.4
1.2
1.0
IL = 100mA
0.8
0.6
0.4
IL = 1mA
0.2
0.0
0 2 4 6 8 10
SUPPLY VOLTAGE (V)
March 2006
3
Dropout
Characteristics
3.5
3.0
2.5
IL = 100mA
2.0
1.5
1.0
IL = 100µA, 1mA
0.5
0.0
0 2 4 6 8 10
INPUT VOLTAGE (V)
Output Voltage
vs. Output Current
3.5
3.0
2.5
C IN = 2.2µF
2.0
C OUT = 4.7µF
1.5
1.0
0.5
0.0
0.0
0.1
0.2
0.3
OUTPUT CURRENT (A)
MIC5202
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