Sharp LC-32LE340E, Service Manual

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LC-32LE340/343
LC-40LE340/343
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Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. An
adjustable soft-start reduces the stress on the input source at startup. In shutdown mode the
regulator draws 20µA of supply current. The MP1583 requires a minimum number of
external components, providing a compact solution.
FEATURES
• 3A Output Current
• Programmable Soft-Start
• 100m Ÿ,QWHUQDO3RZHU026)(76ZLWFK
• Stable with Low ESR Output Ceramic Capacitors
• Up to 95% Efficiency
• 20µA Shutdown Mode
• Fixed 385KHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.75V to 23V Operating Input Range
• Output Adjustable from 1.22V to 21V
• Under-Voltage Lockout
MP2012 (U39)
The MP2012 is a fully integrated, internally compensated 1.2MHz fixed frequency PWM
step-down converter. It is ideal for powering portable equipment that runs from a single cell
Lithium-Ion (Li+) Battery, with an input range from 2.7V to 6V. The MP2012 can provide up
to 1.5A of load current with output voltage as low as 0.8V. It can also operate at 100% duty
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LC-32LE340/343
LC-40LE340/343