LTC7817 Series

40V, Low IQ, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

40V, Low IQ, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller

Part	Number of Outputs	Output Type	Frequency - Switching [Min]	Frequency - Switching [Max]	Function	Output Configuration	Control Features	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Phases	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Duty Cycle (Max) [Max]	Topology	Mounting Type	Package / Case
Analog Devices Inc./Maxim Integrated LTC7817IUHF#WTRPBF	3	Transistor Driver	100 kHz	3 MHz	Step-Down Step-Up	Positive	Current Limit Enable Frequency Control	4.5 V	40 V	2	-40 C	125 °C	38-QFN (5x7)	100 %	Boost Buck	Surface Mount	38-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7817JUHF#WPBF	3	Transistor Driver	100 kHz	3 MHz	Step-Down Step-Up	Positive	Current Limit Enable Frequency Control	4.5 V	40 V	2	-40 °C	150 °C	38-QFN (5x7)	100 %	Boost Buck	Surface Mount	38-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7817EUHF#PBF	3	Transistor Driver	100 kHz	3 MHz	Step-Down Step-Up	Positive	Current Limit Enable Frequency Control	4.5 V	40 V	2	-40 C	125 °C	38-QFN (5x7)	100 %	Boost Buck	Surface Mount	38-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7817EUHF#TRPBF	3	Transistor Driver	100 kHz	3 MHz	Step-Down Step-Up	Positive	Current Limit Enable Frequency Control	4.5 V	40 V	2	-40 C	125 °C	38-QFN (5x7)	100 %	Boost Buck	Surface Mount	38-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7817JUHF#WTRPBF	3	Transistor Driver	100 kHz	3 MHz	Step-Down Step-Up	Positive	Current Limit Enable Frequency Control	4.5 V	40 V	2	-40 °C	150 °C	38-QFN (5x7)	100 %	Boost Buck	Surface Mount	38-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7817IUHF#WPBF	3	Transistor Driver	100 kHz	3 MHz	Step-Down Step-Up	Positive	Current Limit Enable Frequency Control	4.5 V	40 V	2	-40 C	125 °C	38-QFN (5x7)	100 %	Boost Buck	Surface Mount	38-WFQFN Exposed Pad

Catalog

40V, Low IQ, 3MHz, Triple Output Buck/Buck/Boost Synchronous Controller

Description

The LTC7817 is a high performance triple output (buck/buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Its constant frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7817 operates from a wide 4.5V to 40V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC7817 can operate from an input supply as low as 1V after start-up.The very low no-load quiescent current extends operating run time in battery powered systems. OPTI-LOOP®compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC7817 features a precision 0.8V reference for the bucks, 1.2V reference for the boost and a power good output indicator.The LTC7817 synchronous boost Pass-Thru capability minimizes losses in automotive start-stop applications.APPLICATIONSAutomotive and TransportationIndustrialMilitary/Avionics