LTC3601IUD#PBF

LTC3601 is a high efficiency, monolithic synchronous buck regulator using a phase-lockable controlled on-time, current mode architecture capable of supplying up to 1.5A of output current. Operating supply voltage range is from 4V to 15V, making it suitable for wide range of power supply applications. For switching noise sensitive applications, it can be externally synchronized over same frequency range. An internal phase-locked loop aligns on-time of top power MOSFET to the internal or external clock. This unique constant frequency/controlled on-time architecture is ideal for high step-down ratio applications that demand high switching frequencies and fast transient response. It offers two operational modes: burst mode operation and forced continuous mode to allow the user to optimize output voltage ripple, noise, and light load efficiency for a given application. Applications include distributed power systems, lithium-ion battery-powered instruments and point-of-load power supply.

• Up to 96% efficiency, very low duty cycle operation: 5% at 2.25MHz
• External frequency synchronization
• Current mode operation for excellent line and load transient response
• User selectable burst mode (no load IQ = 300µA) or forced continuous operation
• 0.6V reference allows low output voltages, short-circuit protected
• Output voltage tracking capability, programmable soft-start, power good status output
• Adjustable switching frequency of 800KHz to 4MHz
• 2.8A maximum valley switch current limit
• 16-lead (3mm × 3mm) plastic QFN package, –40°C to 125°C temperature range

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