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LTC3609

Linear Technology
Part Number LTC3609
Manufacturer Linear Technology
Description 6A Monolithic Synchronous Step-Down DC/DC Converter
Published Jun 26, 2009
Detailed Description Features n 6A Output Current n Wide VIN Range = 4V to 32V (36V Maximum) n Internal N-Channel MOSFETs n True Current Mode...
Datasheet PDF File LTC3609 PDF File

LTC3609
LTC3609


Overview
Features n 6A Output Current n Wide VIN Range = 4V to 32V (36V Maximum) n Internal N-Channel MOSFETs n True Current Mode Control n Optimized for High Step-Down Ratios n tON(MIN) ≤ 100ns n Extremely Fast Transient Response n Stable with Ceramic COUT n ±1% 0.
6V Voltage Reference n Power Good Output Voltage Monitor n Adjustable On-Time/Switching Frequency n Adjustable Current Limit n Programmable Soft-Start n Output Overvoltage Protection n Optional Short-Circuit Shutdown Timer n Low Shutdown IQ: 15µA n Available in a 7mm × 8mm 52-Pin QFN Package Applications n Point of Load Regulation n Distributed Power Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.
S.
Patents, including 5481178, 6100678, 6580258, 5847554, 6304066.
LTC3609 32V, 6A Monolithic Synchronous Step-Down DC/DC Converter Description The LTC®3609 is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 6A output current from a 4V to 32V (36V maximum) input supply.
It uses a valley current control architecture to deliver very low duty cycle operation at high frequency with excellent transient response.
The operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT.
The LTC3609 can be configured for discontinuous or forced continuous operation at light load.
Forced continuous operation reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads.
Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and an optional short-circuit shutdown timer.
Soft-start capability for supply sequencing is accomplished using an external timing capacitor.
The regulator current limit is user programmable.
A power good output voltage monitor indicates when the output is in regulati...


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