LTC1735IGN-1#PBF

LTC1735IGN-1#PBF is a synchronous step-down switching regulator controller optimized for CPU power. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The operating frequency (synchronizable up to 500KHz) is set by an external capacitor allowing maximum flexibility in optimizing efficiency. The output voltage is monitored by a power good window comparator that indicates when the output is within 7.5% of its programmed value, conforming to intel mobile CPU specifications. Protection features include internal foldback current limiting, output overvoltage crowbar and optional short-circuit shutdown. Soft-start is provided by an external capacitor that can be used to properly sequence supplies. It is widely used in application such as notebook and palmtop computers, PDAs, power supply for Mobile Pentium® III processor with SpeedStep™ Technology, cellular telephones and wireless modems etc.

• Dual N-channel MOSFET synchronous drive
• Programmable/synchronizable fixed frequency
• VOUT range from 0.8V to 7V, Wide VIN range from 3.5V to 36V
• ±1% output voltage accuracy
• Power good output voltage monitor, internal current foldback
• Output overvoltage crowbar protection, remote output voltage sense
• Latched short-circuit shutdown timer with defeat option
• Input DC supply current ( normal mode) is 450µA typical at (3.6V <lt/> VIN <lt/> 30V, TA = 25°C)
• Shutdown current is 15µA typical at (VRUN/SS = 0V, TA = 25°C. VIN = 15V, VRUN/SS = 5V)
• Operating temperature is -40°C to 85°C, package style is 16-lead plastic SSOP

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