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Fast 2-Phase, No RSENSE Buck Controller with Output Tracking
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LTC3708
Fast 2-Phase, No RSENSE
Buck Controller with
Output Tracking
DESCRIPTION FEATURES n n n n n n n n n n n n n n n Very Low Duty Factor Operation (tON(MIN) < 85ns)
No RSENSE Option for Maximum Efficiency
Very Fast Transient Response
Programmable Output Voltage Up/Down Tracking
2-Phase Operation Reduces Input Capacitance
0.6V ±1% Output Voltage Reference
External Frequency Synchronization
Monotonic Soft-Start
Onboard High Current MOSFET Drivers
Wide VIN Range: Up to 36V
Adjustable Cycle-by-Cycle Current Limit
Instant Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Power Good Output with 100µs Masking
Available in 5mm × 5mm QFN Package The LTC®3708 is a dual, 2-phase synchronous step-down
switching regulator with output voltage up/down tracking
capability. The IC allows either coincident or ratiometric
tracking. Multiple LTC3708s can be daisy-chained in applications requiring more than two voltages to be tracked.
Power supply sequencing is accomplished using an external soft-start timing capacitor. …