LT8619EDD#PBF

LT8619 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 6μA of quiescent current. It can deliver 1.2A continuous current. Top and bottom power switches are included with all necessary circuitry to minimize need for external components. Low ripple burst mode operation enables high efficiency down to very low output currents while keeping the output ripple to 10mVP-P. A SYNC pin allows forced continuous mode operation synchronized to external clock. Internal compensation with peak current mode topology allows use of small inductors and results in fast transient response and good loop stability. EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down LT8619, reducing input supply current to below 0.6μA. Applications include 12V and 24V commercial vehicles, 48V electric and hybrid vehicles, industrial supplies.

• Wide input voltage range of 3V to 60V, fast minimum switch-on time of 30ns
• Ultralow quiescent current burst mode operation
• 6μA IQ regulating 12VIN to 3.3VOUT, 10mVP-P output ripple at no load
• Synchronizable/programmable fixed frequency forced continuous mode operation: 300kHz to 2.2MHz
• High efficiency synchronous operation (92% at 0.5A/5VOUT from 12VIN/90% at 0.5A/3.3VOUT from 12VIN)
• Low dropout: 360mV at 0.5A, low EMI
• Accurate 1V enable pin threshold, internal soft-start and compensation
• Power good flag
• 10-lead plastic DFN package, –40°C to 125°C temperature range

Notes

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