mic49500 Micrel Semiconductor, mic49500 Datasheet
mic49500
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mic49500 Summary of contents
Page 1
... The input supply operates from 1. and the bias supply requires between 3V and 6V for proper operation. The MIC49500 can regulate to an output voltage as low as 0.7V, making it an ideal product for low-voltage to low-voltage conversion ...
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Block Diagram EN Enable July 2007 Ilimit Bandgap ADJ FIX 2 VBIAS VIN ADJ SNS / ADJ FIX (SNS) VOUT GND M9999-071307 ...
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... MIC49500-0.9WR 0.9V MIC49500-1.2WR 1.2V MIC49500WR ADJ MIC49500-0.9WU 0.9V MIC49500-1.2WU 1.2V MIC49500WU ADJ Other Voltage available. Contact Micrel for details. * RoHS compliant with ‘high-melting solder’ exemption. Pin Configuration MIC49500WR (S-Pak-7) Pin Description Pin Number Pin Name S-Pak-7 (Fixed VBIAS 3 VIN 4 GND 5 ...
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Absolute Maximum Ratings Supply Voltage (V ) ............................................. 6.5V IN Bias Supply Voltage (V ) .................................. 6.5V BIAS Enable Input Voltage (V )................................... 6.5V EN Power Dissipation............................. Internally Limited Junction Temperature ................. -40°C ≤ T Storage Temperature (TS) ........... -65°C ...
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Typical Characteristics Ground Current vs. Load Current OUT V = 1.2V 30 OUT 3.3V 25 BIAS C = 10µF OUT 20 ...
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... OUT C = 10µF OUT I = 10mA OUT 0.01 0.01 0 100 1,000 10,000 FREQUENCY (kHz) July 2007 MIC49500 VBIAS PSRR 100 100 1k 10k 100k 1M FREQUENCY (Hz) 6 MIC49500 VIN PSRR 100 1k 10k 100k 1M FREQUENCY (Hz) M9999-071307 ...
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Functional Characteristics Enable Turn-On Time (2µs/div) Line Transient (V 4V Time (100µs/div) July 2007 V = 1.8V OUT BIAS I = 10mA OUT 10µF OUT BIAS C = 47pF FEEDFORWARD ...
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... Bias Supply Voltage V , requiring relatively light current, provides power BIAS to the control portion of the MIC49500. V approximately 70mA for 5A load current. Most of the biasing current is used to supply the base current to the pass transistor. This allows the pass element to be driven into saturation, reducing the dropout to 290mV load current ...
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... The low dropout properties of the MIC49500 allow significant reductions dissipation and the associated heat sink without compromising performance. When this technique is employed, a capacitor of at least 1µF is needed directly between the input and regulator ground. Refer to Application Note 9 for further details and examples on thermal design and heat sink specification ...
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Package Information July 2007 7-Pin SPAK (R) 7-Pin TO-263 (U) 10 M9999-071307 ...
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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 responsibility is ...