MIC2183 Micrel Semiconductor, MIC2183 Datasheet
MIC2183
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MIC2183 Summary of contents
Page 1
... The operating frequency can be divided by two by raising the FREQ/2 pin This allows the user to optimize efficiency DD versus board space. It also allows the MIC2183 to be exter- nally synchronized to frequencies below its nominal 400KHz. The MIC2183 features an oscillator output, FreqOut, which can be used to implement a simple charge pump in low voltage applications ...
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... MIC2183 Ordering Information Part Number MIC2183BM MIC2183BQS Pin Configuration MIC2183 Output Voltage Frequency Adjustable 200/400KHz Adjustable 200/400KHz VINA 1 16 VINP FreqOut COMP 4 13 SGND EN/UVLO 7 10 CSL Lead SOIC (M) 16 Lead QSOP (QS) 2 Junction Temp. Range Package – ...
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... DD Power Input voltage to the circuit. The output gate drivers are powered from this supply. The current sense resistor R possible to this pin. 3 Micrel P input also the supply voltage bus for the should be connected as close as CS MIC2183 ...
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... Soft Start Current Current Limit Current Limit Threshold Voltage Voltage on CSH-CSL to trip current limit Error Amplifier Error Amplifier Gain Current Amplifier Current Amplifier Gain MIC2183 Operating Ratings (Note 1) Supply Voltage (V Ambient Operating Temperature ......... –40 C Junction Temperature ....................... –40 C Output Voltage Range ...................................... 1.3V to 12V PackageThermal Resistance ) ............... – ...
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... vs Micrel Min Typ Max Units 360 400 440 kHz 100 % 165 ns 170 200 230 kHz 0 kHz 0.6 1.4 2 200 ns f +15 % 600 kHz kHz – MIC2183 ...
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... Input Voltage 2.5 2.0 200kHz 1.5 1.0 0.5 0 -0.5 -1.0 400kHz -1.5 -2 INPUT VOLTAGE (V) Overcurrent Threshold vs. Input Voltage 102 100 INPUT VOLTAGE (V) MIC2183 Quiescent Current vs. Temperature 1.4 400kHz 1.2 1.0 200kHz 0.8 I STANDBY 0.6 0 VINA VINP 0.2 INA INP = 3.3V 0 -40 - 100120140 TEMPERATURE ( C) V vs. Temperature DD 3.04 3.03 3 ...
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... MIC2183 OUTP Drive Impedance vs. Input Voltage SINK 3 2 SOURCE INPUT VOLTAGE (V) December 10, 2001 7 Micrel MIC2183 ...
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... The controller is optimized for high efficiency, high performance DC-DC converter applications. Figure block diagram of the MIC2183 configured as a synchronous buck converter. At the beginning of the switch- ing cycle, the OUTP pin pulls low and turns on the high-side ...
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... UVLO threshold. The enable pin (pin 7) has two threshold levels, allowing the MIC2183 to shut down in a low current mode, or turn off output switching in standby mode. An enable pin voltage lower than the shutdown threshold turns off all the internal circuitry and places the MIC2183 in a micropower shutdown mode ...
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... Qgate is the total gate charge of both the N and P- channel MOSFETs The graph in Figure 4 shows the total gate charge that can be driven by the MIC2183 over the input voltage range, for different values of switching frequency pin must DD Figure 4. MIC2183 Frequency vs Max. Gate Charge Oscillator & ...
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... The sync signal frequency must be greater than the maximum speci- fied free running frequency of the MIC2183. If the synchroniz- ing frequency is lower, double pulsing of the gate drive outputs will occur. When not used, the sync pin must be connected to ground ...
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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. MIC2183 PIN 1 DIMENSIONS: INCHES (MM) 0 ...