MIC5239 Micrel Semiconductor, MIC5239 Datasheet
MIC5239
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MIC5239 Summary of contents
Page 1
... Capable of 500mA output, the MIC5239 has a dropout voltage of only 350mV. It can provide high output current for applications such as USB Cap LDO, the MIC5239 is stable with either a ceramic or a tantalum output capacitor. It only requires a 3.3 F output capacitor for stability. The MIC5239 includes a logic compatible enable input and an undervoltage error flag indicator ...
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... MIC5239 Ordering Information Part Number * MIC5239-3.0BMM MIC5239-3.0BS MIC5239-3.0BM MIC5239BMM MIC5239BM Pin Configuration EN 1 FLG OUT 4 SOIC-8 (M) MSOP-8 (MM) (Fixed) Pin Description Pin Number Pin Number Pin Name MSOP-8/SOIC-8 SOT-223 2 (Fixed (Adj 5–8 2 MIC5239 Voltage Junction Temp ...
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... The x.xBMM (all versions C/W, the MIC5239-x.xBM (all versions C/W, and the MIC5239-x.xBS (all versions C/W mounted board (see “Thermal Characteristics” for further details). ...
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... Regulation is measured at constant junction temperature using pulse testing with a low duty-cycle. Changes in output voltage due to heating effects are covered by the specification for thermal regulation. Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1.0V differential. MIC5239 4 Micrel January 2002 ...
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... OUTPUT CURRENT ( A) Ground Pin Current vs. Temperature 10 500mA LOAD 10 9.5 9 8.5 8 7.5 -40 - 100 120 TEMPERATURE ( C) Ground Pin Current vs. Input Voltage 1mA OUT I = 100 A 30 OUT OUT INPUT VOLTAGE (V) Micrel = 30V = 4V 400 500 24 29 MIC5239 ...
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... MIC5239 Input Current 120 100 LOAD 0 -20 - SUPPLY VOLTAGE (V) MIC5239 Output Voltage vs. Temperature 3. 100 A LOAD 3.04 3.03 3.02 3.01 3 2.99 2.98 2.97 2.96 2.95 -40 - 100 120 TEMPERATURE ( C) Load Transient Response 500mA 0mA OUT C = 4.7 F ceramic OUT TIME (400 s/div.) ...
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... MIC5239 Functional Diagram January 2002 ENABLE V REF GND Block Diagram - Fixed Voltages ENABLE GND Block Diagram - Adjustable Voltages 7 Micrel OUT FLAG OUT R1 ADJ R2 MIC5239 ...
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... Larger values may be required if the source supply has high ripple. Output Capacitor The MIC5239 has been designed to minimize the effect of the output capacitor ESR on the closed loop stability result, ceramic or film capacitors can be used at the output. Figure 2 displays a range of ESR values for capacitor. Virtually any 10 F capacitor with an ESR less than 3 ...
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... Power MSOP-8 Thermal Characteristics One of the secrets of the MIC5239’s performance is its power MSOP-8 package featuring half the thermal resistance of a standard MSOP-8 package. Lower thermal resistance means more output current or higher input voltage for a given package size ...
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... Figure 9 shows that the required area of copper is less than 100mm Adjustable Regulator Application Figure 10. Adjustable Voltage Application The MIC5239BM can be adjusted from 1.24V to 20V by using two external resistors (Figure 10). The resistors set the output voltage based on the following equation OUT REF Where V REF Feeback resistor R2 should be no larger than 300k ...
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... MAX 0.84 (0.033) 0.64 (0.025) SOT-223 (S) 0.199 (5.05) 0.187 (4.74) 0.120 (3.05) 0.116 (2.95) 0.043 (1.09) 0.038 (0.97) 0.012 (0.30) R 0.008 (0.20) 5 MAX 0.004 (0.10) 0 MIN 8-Lead MSOP (MM) 11 DIMENSIONS: MM (INCH) 0.38 (0.015) 0.25 (0.010) 0.91 (0.036) MIN DIMENSIONS: INCH (MM) 0.007 (0.18) 0.005 (0.13) 0.012 (0.03) R 0.039 (0.99) 0.035 (0.89) 0.021 (0.53) Micrel MIC5239 ...
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... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC5239 MAX) PIN 1 ...