LTC3865LTC3865-1 Series

Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

Part	Number of Outputs	Topology	Package / Case	Package / Case	Duty Cycle (Max) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]	Function	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Phases	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Control Features	Supplier Device Package	Output Type	Output Configuration
Analog Devices Inc./Maxim Integrated LTC3865IFE#PBF	2	Buck	38-TFSOP Exposed Pad	0.173 " 4.4 mm	95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	38-TSSOP-EP	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865IUH#PBF	2	Buck			95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	32-QFN (5x5)	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865IUH#TRPBF	2	Buck			95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	32-QFN (5x5)	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865IUH-1#TRPBF	2	Buck			95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	32-QFN (5x5)	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865EFE#PBF	2	Buck	38-TFSOP Exposed Pad	0.173 " 4.4 mm	95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	38-TSSOP-EP	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865IUH-1#PBF	2	Buck			95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	32-QFN (5x5)	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865EUH#PBF	2	Buck			95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	32-QFN (5x5)	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865EUH#TRPBF	2	Buck			95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	32-QFN (5x5)	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865EFE#TRPBF	2	Buck	38-TFSOP Exposed Pad	0.173 " 4.4 mm	95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	38-TSSOP-EP	Transistor Driver	Positive
Analog Devices Inc./Maxim Integrated LTC3865EUH-1#TRPBF	2	Buck			95 %	770 kHz	250 kHz	Step-Down	4.5 V	38 V	2	-40 C	125 °C	Surface Mount	Current Limit Enable Frequency Control Power Good Soft Start Tracking	32-QFN (5x5)	Transistor Driver	Positive

Catalog

Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

Description

The LTC3865/LTC3865-1 are high performance dual synchronous step-down DC/DC switching regulator controllers that drive all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 770kHz. Power loss and noise are minimized by operating the two controller output stages out of phase.OPTI-LOOP®compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. Independent track/soft-start pins for each controller ramp the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The MODE/PLLIN pin selects among Burst Mode®operation, pulse-skipping mode, and continuous inductor current mode. The output voltages can be precisely programmed by pin strapping or external resistors.The LTC3865/LTC3865-1 are available in low profile (5mm × 5mm) 32-pin QFN and 38-Lead thermally enhanced TSSOP packages.ApplicationsDC Power Distribution Systems