MIC2288 Micrel Semiconductor, MIC2288 Datasheet
MIC2288
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MIC2288 Summary of contents
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... The MIC2288 is available in a low-profile Thin SOT-23-5 package and a 2mm 2mm MLF™-8 leadless package. The 2mm 2mm MLF™-8 package option has an output over- voltage protection feature. The MIC2288 has a junction temperature range of – +125 C. All support documentation can be found on Micrel’s web site at www.micrel.com. ...
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... MIC2288 Ordering Information Marking Output Part Number Code Voltage MIC2288BD5 SHAA Adjustable MIC2288YD5 SHAA Adjustable MIC2288BML SJA Adjustable MIC2288YML SJA Adjustable Pin Configuration FB GND VIN TSOT-23-5 (D5) Pin Description Pin Number Pin Number TSOT-23 MLF™-8 Pin Name ...
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... I 40mA OUT 0V 10V EN SW Turn on Turn off V = 10V EN MIC2288 MLF™ package option only Hysteresis , and the ambient temperature The maximum allowable power dissipation will result in excessive (2) ) ........................................ 2.5V to 10V IN ) ........... – +125 ................................. 93 C .......................................... 256 C 125 C. ...
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... MIC2288 Typical Characteristics Efficiency 12V OUT 100 125 150 OUTPUT CURRENT (mA) Current Limit vs. Supply Current 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 2.5 4 5.5 7 8.5 10 SUPPLY VOLTAGE (V) Switch Saturation vs. Current 700 600 500 400 300 200 V = 3.6V 100 200 ...
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... MIC2288 Function Characteristics Enable Characteristics Output Voltage Enable Voltage Time (400µs/div) Load Transient Response 3.6V 12V C OUT Time (400 s/div) February 2004 3.6V IN 12V OUT 150mA Load 150mA 10mA IN OUT = Line Transient Response 4.2V 3.2V 12V OUT 150mA Load Time (400 s/div) ...
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... FB 1.24V * OVP available on MLF Functional Description The MIC2288 is a constant frequency, PWM current mode boost regulator. The block diagram is shown in Figure 1. The MIC2288 is composed of an oscillator, slope compensation ramp generator, current amplifier, g generator, and a 1A bipolar output transistor. The oscillator generates a 1.2MHz clock. The clock’s two functions are to trigger the PWM generator that turns on the output transistor, and to reset the slope compensation ramp generator ...
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... This will cause the MIC2288 to switch at full duty cycle in an attempt to maintain the feedback voltage result, the output voltage will climb out of control. This may cause the switch node voltage to exceed its maximum voltage rating, possibly damaging the IC and the external components ...
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... MIC2288, with short traces for good noise performance. M9999-021904 Feedback Resistors The MIC2288 utilizes a feedback pin to compare the output to an internal reference. The output voltage is adjusted by selecting the appropriate feedback resistor values. The de- sired output voltage can be calculated as follows: ...
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... MIC2288BML R1 VIN SW 54.9k C1 OVP 2.2 F 10V EN FB GND R2 5k GND 08052D225KAT 1206YD106MAT MBRM140T3 LQH43CN100K03 – 4.2V to 15V IN IN OUT MIC2288BML R1 VIN SW 18.2k C1 OVP 2.2 F 10V EN FB GND R2 1k GND 08052D225KAT 12063D475MAT MBRM140T3 LQH43CN100K03 – 4.2V to 24V IN IN OUT ...
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... C2 4.7 F, 25V, 1206 X5R Ceramic Capacitor 1206YD106MAT AVX D1 1A, 40V Schotty Diode MBRM140T3 ON Semi 650mA Inductor LQH43CN100K03 Murata @ 250mA 24V @ 80mA MIC2288BML R1 VIN SW 18.2k C1 OVP 10V EN FB GND R2 1k 08052D225KAT 12066D475MAT MBRM140T3 LQH32CN4R7M11 Murata Figure 10 24V ...
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... MIC2288 Package Information February 2004 All Dimensions are in millimeters 5-Pin TSOT (D5) 8-Pin MLF™ (ML) 11 Micrel M9999-021904 ...
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... MIC2288 Grey Shaded area indicates Thermal Via. Size should be 0.300mm in diameter and it should be connected to GND for maximum thermal performance Recommended Land Pattern for (2mm MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. ...