LTC3850EUFD#PBF

LTC3850 is a high performance dual synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. A constant-frequency current mode architecture allows a phase-lockable frequency of upto 780KHz. Power loss and supply noise are minimized by operating the two controller output stages out of phase. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. It features a precision 0.8V reference and a power good output indicator. Independent TK/SS pins for each controller ramp the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. It is widely used in applications such as notebook and palmtop computers, portable instruments, battery-operated digital devices, DC power distribution systems etc.

• Dual, 180° phased controllers reduce required input capacitance and power supply induced noise
• High efficiency upto 95%, RSENSE or DCR current sensing
• Phase-lockable fixed frequency from 250KHz to 780KHz
• Supports pre-biased output, dual N-channel MOSFET synchronous drive
• Wide VIN range from 4V to 24V
• Adjustable soft-start current ramping or tracking
• Foldback output current limiting, power good output voltage monitor
• Shutdown current is 30µA typ at (VRUN1,2 = 0V, TA = 25°C, VIN = 15V)
• Operating temperature range from -40°C to 85°C
• Package style is 28-lead plastic QFN

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