LM5000-3MTCX/NOPB Power Regulator IC Switching Voltage Regulators High Vtg Switch Mode Reg
electronic voltage regulator circuit
,variable voltage regulator ic
LM5000-3MTCX/NOPB Power Regulator IC Switching Voltage Regulators High Vtg Switch Mode Reg
FEATURES
- 80V Internal Switch
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Operating Input Voltage Range of 3.1V to 40V
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Pin Selectable Operating Frequency
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– 300kHz/700kHz (-3)
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– 600kHz/1.3MHz (-6)
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Adjustable Output Voltage
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External Compensation
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Input Undervoltage Lockout
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Softstart
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Current Limit
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Over Temperature Protection
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External Shutdown
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Small 16-Lead TSSOP or 16-Lead WSON Package
APPLICATIONS
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Flyback Regulator
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Forward Regulator
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Boost Regulator
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DSL Modems
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Distributed Power Converters Typical Application Circuit
DESCRIPTION
The LM5000 is a monolithic integrated circuit specifically designed and optimized for flyback, boost or forward power converter applications. The internal power switch is rated for a maximum of 80V, with a current limit set to 2A. Protecting the power switch are current limit and thermal shutdown circuits. The current mode control scheme provides excellent rejection of line transients and cycle-by-cycle current limiting. An external compensation pin and the built-in slope compensation allow the user to optimize the frequency compensation. Other distinctive features include softstart to reduce stresses during start-up and an external shutdown pin for remote ON/OFF control. There are two operating frequency ranges available. The LM5000-3 is pin selectable for either 300kHz (FS Grounded) or 700kHz (FS Open). The LM5000-6 is pin selectable for either 600kHz (FS Grounded) or 1.3MHz (FS Open). The device is available in a low profile 16-lead TSSOP package or a thermally enhanced 16-lead WSON package.
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