LTC3539EDCB#TRPBF

LTC®3539 is a synchronous, 2A step-up DC/DC converter with output disconnect. Battery life is extended with a 700mV start-up voltage and operation down to 500mV once started. The current mode PWM design is internally compensated, reducing external parts count. This features a pin-enabled automatic burst mode operation at light load conditions. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1µA and thermal overload protection. Typical applications are medical instruments, portable bar code scanners, noise cancelling headphones, portable GPS navigation, handheld PCs.

• Up to 94% efficiency, VIN <gt/> VOUT operation
• ±1.5% feedback voltage tolerance
• 1MHz fixed frequency operation
• Output disconnect, requires only 6 external components
• Input voltage range from 0.5 to 5V (after start-up)
• Switching frequency range from 0.7 to 1.3MHz ( TA=25°C. VIN=1.2V, VOUT=3.3V)
• Active-low SHDN input current is 1µA (VSHDN=1.2V)
• 8-lead plastic DFN package
• Temperature rating range from -40°C to 85°C

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