mic4723yml Micrel Semiconductor, mic4723yml Datasheet

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General Description The Micrel MIC4723 is a high efficiency PWM buck (step- down) regulator that provides output current. The MIC4723 operates at 2.0MHz and has proprietary internal compensation that allows a closed loop bandwidth of over ...

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... Micrel, Inc. Ordering Information Part Number MIC4723YML MIC4723YMME Note ® MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration SW 1 VIN 2 PGND 3 SGND 4 BIAS 12-Pin 3mm x 3mm MLF (ML) Pin Description Pin Number Pin Number ...

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... Specification for packaged product only. January 2008 (1) Operating Ratings Supply Voltage (V Logic Input Voltage (V Junction Temperature (T Junction Thermal Resistance IN (4) = 25°C, unless noted. Bold values indicate –40°C< MIC4723YML MIC4723YMME (not switching) NOM = 100mA LOAD NOM > 2V +500mV to 5.5V OUT LOAD < ...

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Micrel, Inc. Typical Characteristics MIC4723 3.3V Efficiency OUT 0.5 1 1.5 2 2.5 OUTPUT CURRENT (A) MIC4723 1.8V Efficiency OUT 90 4.5V ...

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Micrel, Inc. Typical Characteristics (continue) Line Regulation 1.0010 1.0008 1.0006 1.0004 1.0002 1.0000 0.9998 0.9996 0.9994 0.9992 0.9990 2.7 3.2 3.7 4.2 4.7 5.2 SUPPLY VOLTAGE (V) Feedback Voltage vs. Supply Voltage 1.2 1.0 0.8 0.6 0.4 0 ...

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Micrel, Inc. Functional Characteristics January 2008 6 MIC4723 M9999-011808-D ...

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Micrel, Inc. Functional Diagram VIN VIN BIAS Enable and EN Control Logic January 2008 Bias, UVLO, Thermal Shutdown SGND MIC4723 Block Diagram 7 P-Channel Current Limit HSD PWM Control Soft EA Start 1.0V 1.0V PGND MIC4723 PGOOD ...

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... Two pins for VIN provide power to the source of the internal P-channel MOSFET along with the current limiting sensing. The VIN operating voltage range is from 2.7V to 5.5V for the MIC4723YML or 3.0V to 5.5V for the MIC4723YMME. Due to the high switching speeds, a 10µF capacitor is recommended close to VIN and the power ground (PGND) for each pin for bypassing ...

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Micrel, Inc. Application Information The MIC4723 PWM non-synchronous buck regulator. By switching an input voltage supply, and filtering the switched voltage through an Inductor and capacitor, a regulated DC voltage is obtained. Figure 1 shows a simplified ...

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Micrel, Inc OUT D − L The total off time can be calculated as; − OFF 2.0MHz Figure 4. Off-Time Discontinuous Operation Discontinuous operation is when the inductor current discharges to ...

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Micrel, Inc. losses on the Schottky diode. Inductor conduction losses (P ) can be calculated by L multiplying the DC resistance (DCR) times the square of the output current × P DCR I L OUT Also, be aware ...

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Micrel, Inc. Component Selection Input Capacitor A 10µF ceramic is recommended on each VIN pin for bypassing. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not ...

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Micrel, Inc. Loop Stability and Bode Analysis Bode analysis is an excellent way to measure small signal stability and loop response in power supply designs. Bode analysis monitors gain and phase of a control loop. This is done by breaking ...

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Micrel, Inc. The following Bode analysis show the small signal loop stability of the MIC4723, it utilizes type III compensation. This is a dominant low frequency pole, followed by 2 zeros and finally the double pole of the inductor capacitor ...

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Micrel, Inc. Max. Amount of Phase Boost Obtainable using C Voltage OUTPUT VOLTAGE (V) By looking at the graph, phase margin can be affected to a ...

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Micrel, Inc. Output Impedance and Transient Response Output impedance, simply stated, is the amount of output voltage deviation vs. the load current deviation. The lower the output impedance, the better. ∆ V OUT = Z OUT ∆ I OUT Output ...

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Micrel, Inc. Ripple measurements To properly measure ripple on either input or output of a switching regulator, a proper ring in tip measurement is required. Standard oscilloscope probes come with a grounding clip long wire with an alligator ...

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... C4 VJ0403A820KXAA D1 SSA33L L1 RLF7030-1R0N6R4 744 778 9001 IHLP2525AH-01 1 R1,R4 CRCW04021002F R2 CRCW04026651F CRCW04021242F CRCW04022002F CRCW04024022F R3 CRCW040210R0F U1 MIC4723YML Notes: 1. TDK: www.tdk.com 2. Murata: www.murata.com 3. AVX: www.avx.com 4. Vishay: www.vishay.com 5. Wurth Elektronik: www.we-online.com 6. Micrel, Inc: www.micrel.com January 2008 Manufacturer TDK Murata 10µF Ceramic Capacitor X5R 0805 6.3V ...

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Micrel, Inc. Package Information January 2008 ® 12-Pin 3mm x 3mm MLF (ML) 10-Pin ePAD MSOP (MME) 19 MIC4723 M9999-011808-D ...

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Micrel, Inc. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no ...