MIC2171WU Micrel Inc, MIC2171WU Datasheet
MIC2171WU
Specifications of MIC2171WU
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MIC2171WU Summary of contents
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... C3 1µF * Locate near MIC2171 when supply leads > 2” Figure 1. MIC2171 5V to 12V Boost Converter Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 ( May 2007 Features • 2.5A, 65V internal switch rating • 40V input voltage range • ...
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... Micrel, Inc. Ordering Information Part Number Standard RoHS Compliant* MIC2171BT MIC2171WT MIC2171BU MIC2171WU *RoHS compliant with "high-melting solder" exemption. Pin Configuration Tab GND 5-Pin TO-220 (T) Pin Description Pin Number Pin Name 1 COMP GND May 2007 Temperature Range –40° to +85°C – ...
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Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) .......................................................40V IN Switch Voltage (V )......................................................65V SW Feedback Voltage (transient, 1ms) (V Lead Temperature (soldering, 10 sec.)...................... 300°C Storage Temperature (T ) .........................–65°C to +150°C s (1) ESD Rating Electrical Characteristics ...
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Micrel, Inc. Typical Characteristics Minimum Operating Voltage 2.9 2.8 2.7 2.6 Switch Current = 2A 2.5 2.4 2.3 -100 - 100 150 Temperature (°C) Supply Current D 90% ...
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Micrel, Inc. Functional Diagram IN Reg 1.24V Ref. Functional Description Refer to “Block Diagram MIC2171”. Internal Power The MIC2171 operates when V IN 2.3V regulator supplies biasing to all internal circuitry including a precision 1.24V band gap reference. ...
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Micrel, Inc. Application Information Soft Start A diode-coupled capacitor from COMP to circuit ground slows the output voltage rise at turn on (Figure 3 MIC2171 Figure 3. Soft Start The additional time it takes for ...
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Micrel, Inc. The junction temperature for any semiconductor is calculated using the following θ (total) JA where junction temperature ambient temperature (maximum total power dissipation ...
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Micrel, Inc. where × 0. OUT f = 1×105Hz (100kHz) SW For our practical example × 4.178 0.662 ≥ × × × ≥ 12.4µH (use ...
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Micrel, Inc. For the practical example 65V max. for the MIC2171 0 5.6V SEC then: × − 65 0.8 6.0 ≤ a 5.6 a ≤ 8 PRI SEC Next, ...
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Micrel, Inc. time, using the off-time to reset the transformer core. In the application shown, the transformer core is reset by the tertiary winding discharging T1’s peak magnetizing current through D2. For most forward converters the duty cycle is limited ...
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Micrel, Inc. Package Information May 2007 5-Pin TO-220 (T) 5-Pin TO-263 (U) 11 MIC2171 M9999-051107 ...
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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 ...