MIC2954 Micrel Semiconductor, MIC2954 Datasheet
MIC2954
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MIC2954 Summary of contents
Page 1
... This part may be pin-strapped for 5V output, or pro- grammed from 1.24V to 29V with the use of two external resistors. The MIC2954 is available in two voltage tolerances, 0.5% maximum and 1% maximum. Both are guaranteed for junction temperatures from – +125 C. ...
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... MIC2954 Ordering Information Part Number MIC2954-02BT MIC2954-03BT MIC2954-02BS MIC2954-03BS MIC2954-02BZ MIC2954-03BZ MIC2954-07BM MIC2954-08BM Pin Configuration MIC2954 OUT 1 SNS 2 SHDN 3 GND 4 SOP-8 ( OUT GND TO-92 (Z) Pin Description Pin No. Pin No. Pin No. SOT-223 SOP-8 TO-220 TAB MIC2954 Accuracy Junc ...
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... Current Limit, Note 11 LIMIT August 1999 Operating Ratings (Note 1) Input Voltage (V Junction Temperature (T Package Thermal Temperature ( ; V 0.6V. All versions 6V; I OUT SHDN IN Conditions MIC2954-02/-07 ( 0.5%) MIC2954-02/-07 ( 0.5%), 1mA MIC2954-03/-08 ( 1%) MIC2954-03/-08 ( 1%), 1mA MIC2954-02/-07 ( 0.5%) MIC2954-03/-08 ( 1%) MIC2954-02/-07 ( 0.5%), V MIC2954-03/-08 ( 1%), V MIC2954-02/-07 ( 0.5%), I MIC2954-03/-08 ( 1%), 1mA 50mA 100mA 250mA ...
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... Note 6. Output voltage temperature coefficient is defined as the worst case voltage change divide by the total temperature range. Note 7. Line regulation for the MIC2954 is tested at 125 C for I 0.2%. See “Typical Characteristics” for line regulation versus temperature and load current. Note 8. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to heating effects are covered by the thermal regulation specification ...
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... MIC2954 Note 11. The MIC2954 features fold-back current limiting. The short circuit (V output voltage. Note 12. 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. Specifications are for a 200mA load pulse at V Note 13. V ...
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... FREQUENCY (kHz) Line Transient Response C L =2.2µF 400 I L =10mA V OUT =5V 0 -400 0.2 0.4 0.6 0.8 TIME (mS) MIC2954 Ground Pin Current 400 300 200 1mA 100 0 -75 -50 - 100 125 150 7 8 TEMPERATURE ( C) Ground Pin Current 250mA 15 ...
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... I L =250mA INPUT VOLTAGE (VOLTS) Short Circuit and Maximum Current vs. Temperature 700 V OUT = V NOMINAL – 0.5V 650 V OUT = 3.3V 600 550 3 SAMPLES 500 (HI/AVG/LO) 450 400 V OUT = 0V 350 300 5 -60 - 120 150 TEMPERATURE ( C) Micrel 6 MIC2954 ...
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... Block Diagrams Unregulated DC Supply Unregulated DC Supply SHDN TTL/CMOS Control Logic Input MIC2954-07/-08 MIC2954 IN Error Amp. 182k 62k 1.23V REF. MIC2954-02/-03 MIC2954-02 and MIC2954- Error Amp. 182k 60k 60mV Error Detection Comparator 1.23V REF. MIC2954-07 and MIC2954-08 8 OUT 5V/250mA Output 2.2µF GND ...
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... A 0.1 F capacitor should be placed from the MIC2954 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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... Automotive Applications The MIC2954 is ideally suited for automotive applications for a variety of reasons. It will operate over a wide range of input voltages with very low dropout voltages (40mV at light loads), and very low quiescent currents (75 A typical) ...
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... Diam. 0.185 (4.699) 0.175 (4.445) 0.090 (2.286) typ. 0.025 (0.635) Max Uncontrolled Lead Diameter 0.500 (12.70) Min. 0.055 (1.397) 0.045 (1.143) 0.105 (2.667) 0.095 (2.413) TO-92 (Z) 11 0.050 0.005 (1.27 0.13 0.100 0.020 (2.54 0.51) DIMENSIONS: INCH (MM) 5 typ. 5 typ. 0.0155 (0.3937) 0.0145 (0.3683) Micrel MIC2954 ...
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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. MIC2954 PIN 1 DIMENSIONS: INCHES (MM) 0 ...