LTC7802JUFDM#WPBF

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Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, SYNCHRONOUS BUCK, 4.5V TO 40V SUPPLY, 2 OUTPUT, 99% DUTY CYCLE, 3MHZ, QFN-EP-28

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LTC7802JUFDM#WPBF

Active

Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, SYNCHRONOUS BUCK, 4.5V TO 40V SUPPLY, 2 OUTPUT, 99% DUTY CYCLE, 3MHZ, QFN-EP-28

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC7802 Series

The LTC7802 is a high performance dual step-down synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7802 operates from a wide 4.5V to 40V input supply range. Power loss and supply noise are minimized by operating the two controller output stages out-of-phase.The very low no-load quiescent current extends operating runtime 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 LTC7802 features a precision 0.8V reference and power good output indicators. The MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.The LTC7802 additionally features spread spectrum operation which significantly reduces the peak radiated and conducted noise on both the input and output supplies, making it easier to comply with electromagnetic interference (EMI) standards.APPLICATIONSAutomotive and TransportationIndustrialMilitary/Avionics

Technical Specifications

Parameters and characteristics for this part

Specification	LTC7802JUFDM#WPBF

Clock Sync	Yes
Control Features	Frequency Control, Power Good, Enable, Soft Start, Tracking
Duty Cycle (Max)	99 %
Frequency - Switching (Max)	3 MHz
Frequency - Switching (Min)	100 kHz
Function	Step-Down
Mounting Type	Wettable Flank, Surface Mount
Number of Outputs	2
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package / Case	28-WFQFN Exposed Pad
Package Length	4 mm
Package Name	28-QFN
Package Width	5 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	40 V
Voltage - Supply (Vcc/Vdd) Minimum	4.5 V

LTC7802 Series

40V Low IQ, 3MHz Dual, 2-Phase Synchronous Step-Down Controller with Spread Spectrum

Part	Synchronous Rectifier	Function	Number of Outputs	Output Configuration	Output Phases	Package / Case	Control Features	Mounting Type	Duty Cycle (Max)	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Operating Temperature (Max)	Operating Temperature (Min)	Package Width	Package Name	Package Length	Output Type	Frequency - Switching (Min)	Frequency - Switching (Max)	Clock Sync	Topology
Analog Devices Inc./Maxim Integrated LTC7802EUFDM#TRPBF	Yes	Step-Down	2	Positive	2	28-WFQFN Exposed Pad	Enable Frequency Control Power Good Soft Start Tracking	Surface Mount Wettable Flank	99 %	4.5 V	40 V	125 °C	-40 °C	5 mm	28-QFN	4 mm	Transistor Driver	100 kHz	3 MHz	Yes	Buck
Analog Devices Inc./Maxim Integrated LTC7802EUFDM#PBF	Yes	Step-Down	2	Positive	2	28-WFQFN Exposed Pad	Enable Frequency Control Power Good Soft Start Tracking	Surface Mount Wettable Flank	99 %	4.5 V	40 V	125 °C	-40 °C	5 mm	28-QFN	4 mm	Transistor Driver	100 kHz	3 MHz	Yes	Buck
Analog Devices Inc./Maxim Integrated LTC7802IUFDM#WTRPBF	Yes	Step-Down	2	Positive	2	28-WFQFN Exposed Pad	Enable Frequency Control Power Good Soft Start Tracking	Surface Mount Wettable Flank	99 %	4.5 V	40 V	125 °C	-40 °C	5 mm	28-QFN	4 mm	Transistor Driver	100 kHz	3 MHz	Yes	Buck
Analog Devices Inc./Maxim Integrated LTC7802JUFDM#WTRPBF	Yes	Step-Down	2	Positive	2	28-WFQFN Exposed Pad	Enable Frequency Control Power Good Soft Start Tracking	Surface Mount Wettable Flank	99 %	4.5 V	40 V	150 °C	-40 °C	5 mm	28-QFN	4 mm	Transistor Driver	100 kHz	3 MHz	Yes	Buck
Analog Devices Inc./Maxim Integrated LTC7802IUFDM#WPBF	Yes	Step-Down	2	Positive	2	28-WFQFN Exposed Pad	Enable Frequency Control Power Good Soft Start Tracking	Surface Mount Wettable Flank	99 %	4.5 V	40 V	125 °C	-40 °C	5 mm	28-QFN	4 mm	Transistor Driver	100 kHz	3 MHz	Yes	Buck
Analog Devices Inc./Maxim Integrated LTC7802JUFDM#WPBF	Yes	Step-Down	2	Positive	2	28-WFQFN Exposed Pad	Enable Frequency Control Power Good Soft Start Tracking	Surface Mount Wettable Flank	99 %	4.5 V	40 V	150 °C	-40 °C	5 mm	28-QFN	4 mm	Transistor Driver	100 kHz	3 MHz	Yes	Buck

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Datasheet

LTC7802: 40V Low IQ, 3MHz Dual, 2-Phase Synchronous Step-Down Controller with Spread Spectrum Data Sheet (Rev.A)

DC2922A-A/DC2922A-B - Demo Manual (Rev.0)