LTC7803EMSE#PBF

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Analog Devices

40V LOW IQ, 3MHZ SYNCHRONOUS STEP-DOWN CONTROLLER WITH SPREAD SPECTRUM

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DocumentsDatasheet LTC7803: 40V Low IQ, 3MHz Synchronous Step-Down Controller with Spread Spectrum Data Sheet (Rev.B)+1

LTC7803EMSE#PBF

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Analog Devices

40V LOW IQ, 3MHZ SYNCHRONOUS STEP-DOWN CONTROLLER WITH SPREAD SPECTRUM

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DocumentsDatasheet LTC7803: 40V Low IQ, 3MHz Synchronous Step-Down Controller with Spread Spectrum Data Sheet (Rev.B)+1

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC7803EMSE#PBF

Clock Sync	True
Control Features	Phase Control, Frequency Control, Enable
Duty Cycle (Max) [Max]	100 %
Frequency - Switching [Max]	3 MHz
Frequency - Switching [Min]	100 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	Exposed Pad, 16-TFSOP
Package / Case	3 mm, 0.118 in
Supplier Device Package	16-MSOP-EP
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	40 V
Voltage - Supply (Vcc/Vdd) [Min]	4.5 V

LTC7803 Series

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

Part	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Phases	Output Type	Package / Case	Package / Case	Function	Number of Outputs	Supplier Device Package	Mounting Type	Duty Cycle (Max) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]	Topology	Control Features	Output Configuration	Operating Temperature [Min]	Operating Temperature [Max]
Analog Devices LTC7803EMSE#PBF	40 V	4.5 V	1	Transistor Driver	16-TFSOP Exposed Pad	0.118 in 3 mm	Step-Down	1	16-MSOP-EP	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	125 ¯C
Analog Devices LTC7803EUD#TRPBF	40 V	4.5 V	1	Transistor Driver	16-WFQFN Exposed Pad		Step-Down	1	16-QFN (3x3)	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	125 ¯C
Analog Devices LTC7803IMSE#PBF	40 V	4.5 V	1	Transistor Driver	16-TFSOP Exposed Pad	0.118 in 3 mm	Step-Down	1	16-MSOP-EP	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	125 ¯C
Analog Devices LTC7803HMSE#PBF	40 V	4.5 V	1	Transistor Driver	16-TFSOP Exposed Pad	0.118 in 3 mm	Step-Down	1	16-MSOP-EP	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	150 °C
Analog Devices LTC7803IUD#TRPBF	40 V	4.5 V	1	Transistor Driver	16-WFQFN Exposed Pad		Step-Down	1	16-QFN (3x3)	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	125 ¯C
Analog Devices LTC7803JUD#TRPBF	40 V	4.5 V	1	Transistor Driver	16-WFQFN Exposed Pad		Step-Down	1	16-QFN (3x3)	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	150 °C
Analog Devices LTC7803JUD#WPBF	40 V	4.5 V	1	Transistor Driver	16-WFQFN Exposed Pad		Step-Down	1	16-QFN (3x3)	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	150 °C
Analog Devices LTC7803JUD#WTRPBF	40 V	4.5 V	1	Transistor Driver	16-WFQFN Exposed Pad		Step-Down	1	16-QFN (3x3)	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	150 °C
Analog Devices LTC7803JUD#PBF	40 V	4.5 V	1	Transistor Driver	16-WFQFN Exposed Pad		Step-Down	1	16-QFN (3x3)	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	150 °C
Analog Devices LTC7803EUD#PBF	40 V	4.5 V	1	Transistor Driver	16-WFQFN Exposed Pad		Step-Down	1	16-QFN (3x3)	Surface Mount	100 %	3 MHz	100 kHz	Buck	Enable Frequency Control Phase Control	Positive	-40 °C	125 ¯C

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 7.06
		10	$ 4.80
		25	$ 4.22
		100	$ 3.56
		250	$ 3.25
		500	$ 3.05
		1000	$ 2.89
		2500	$ 2.73

Description

General part information

LTC7803 Series

The LTC7803 is a high performance, 100% Duty Cycle Capable, synchronous step-down DC/DC switching regulator controller that drives an all N-channel power MOSFET stage. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements. A constant frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7803 operates from a wide 4.5V to 40V input supply range.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 MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.The LTC7803 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/AvionicsTelecommunications

Documents

Technical documentation and resources

Datasheet

LTC7803: 40V Low IQ, 3MHz Synchronous Step-Down Controller with Spread Spectrum Data Sheet (Rev.B)

Data Sheet

DC2834A - Demo Manual (Rev.0)

User Guide