MIC2940 Micrel Semiconductor, MIC2940 Datasheet
MIC2940
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MIC2940 Summary of contents
Page 1
... Key MIC2940A features include protection against reversed battery, fold-back current limiting, and automotive “load dump” protection (60V positive transient). The MIC2940 is available in both fixed voltage (3.3V, 5V, and 12V) and adjustable voltage configurations. The MIC2940A- xx devices are three pin fixed voltage regulators. A logic- ...
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... MIC2940A/2941A Ordering Information Part Number Voltage MIC2940A-3.3BT 3.3 MIC2940A-3.3BU 3.3 MIC2940A-5.0BT 5.0 MIC2940A-5.0BU 5.0 MIC2940A-12BT 12 MIC2940A-12BU 12 MIC2941ABT Adj MIC2941ABU Adj Schematic Diagram IN R11 Q42 180 k Q40 Q41 R30 ERROR MIC2940A/2941A Temperature Range* Package – ...
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... OUT (Note Min Typical –1 –2 –2.5 20 0.03 0.04 60 200 350 400 240 330 OUT 1.6 0.05 400 260 MIC2940A/2941A Micrel Max Units 2.5 100 ppm/ C 0.10 % 0.40 0.16 % 0.20 % 150 mV 180 250 320 450 600 600 350 A 500 4 ...
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... Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the ground pin current. Note 6: The MIC2940A features fold-back current limiting. The short circuit (V normal output voltage. Note 7: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects ...
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... FIXED 3.3V DEVICE I = 1.25A LOAD INPUT VOLTAGE (V) Ground Current vs. Temperature 1.25A LOAD -60 - 120 150 TEMPERATURE ( C) Ground Current vs. Input Voltage 1000 R = 100 LOAD 800 600 400 200 0 -200 -30 -20 - INPUT VOLTAGE (V) MIC2940A/2941A ...
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... MIC2940A/2941A MIC29401/2 Shutdown Current vs. Temperaure 125 100 -60 - 120 150 TEMPERATURE ( C) MIC29402/3 Adjust Pin Current vs. Temperature 5mA 10 LOAD 0 -60 - 120 150 TEMPERATURE ( C) MIC2940A/2941A Load Transient 750 500 OUT 250 ...
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... The external resistors of the MIC2941A version may be scaled to draw this minimum load current. A 0.22 F capacitor should be placed from the MIC2940A input to ground if there is more than 10 inches of wire between the input and the AC filter capacitor battery is used as the input ...
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... MIC2940A/2941A Typical Applications OUT + GND Figure 2. MIC2940A-5.0 Fixed +5V Regulator + OUT GND ADJUST *MINIMUM INPUT-OUTPUT VOLTAGE RANGES FROM 40 DEPENDING ON LOAD CURRENT. Figure 4. MIC2941A Wide Input Voltage Range Current Limiter MIC2940A/2941A *V 5V OUT OUT SHUTDOWN INPUT 10µ OUT = V REF ...