Specification	LTC7811IUJ#TRPBF

Clock Sync	False
Control Features	Frequency Control, Power Good, Current Limit, Soft Start, Enable
Duty Cycle (Max) [Max]	100 %
Frequency - Switching [Max]	3 MHz
Frequency - Switching [Min]	100 kHz
Function	Step-Up/Step-Down
Grade	Automotive
Mounting Type	Surface Mount
Number of Outputs	3
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package / Case	40-WFQFN Exposed Pad
Qualification	AEC-Q100
Supplier Device Package	40-QFN (6x6)
Synchronous Rectifier	True
Topology	Buck-Boost
Voltage - Supply (Vcc/Vdd) [Max]	40 V
Voltage - Supply (Vcc/Vdd) [Min]	1 V

LTC7811 Series

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

Part	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Grade	Control Features	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Frequency - Switching [Min]	Frequency - Switching [Max]	Output Type	Synchronous Rectifier	Function	Mounting Type	Duty Cycle (Max) [Max]	Output Configuration	Clock Sync	Output Phases	Qualification	Topology	Package / Case
Analog Devices Inc./Maxim Integrated LTC7811IUJ#TRPBF	40 V	1 V	Automotive	Current Limit Enable Frequency Control Power Good Soft Start	3	-40 C	125 °C	40-QFN (6x6)	100 kHz	3 MHz	Transistor Driver		Step-Up/Step-Down	Surface Mount	100 %	Positive		2	AEC-Q100	Buck-Boost	40-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC7811IUJ#PBF	40 V	1 V	Automotive	Current Limit Enable Frequency Control Power Good Soft Start	3	-40 C	125 °C	40-QFN (6x6)	100 kHz	3 MHz	Transistor Driver		Step-Up/Step-Down	Surface Mount	100 %	Positive		2	AEC-Q100	Buck-Boost	40-WFQFN Exposed Pad

Pricing

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

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 4.53	1m+

Description

General part information

LTC7811 Series

The LTC7811 is a high performance triple output (buck/buck/boost) 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 LTC7811 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 LTC7811 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 LTC7811 features a precision 0.8V reference for the bucks, 1.2V reference for the boost and a power good output indicator.The LTC7811 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

Documents

Technical documentation and resources

LTC7811IUJ#TRPBF | Datasheet

Datasheet

DC3151A - Demo Manual (Rev.0)

User Guide