LTC3789IUFD#PBF

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Analog Devices

HIGH EFFICIENCY, SYNCHRONOUS, 4-SWITCH BUCK-BOOST CONTROLLER

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LTC3789IUFD#PBF

Active

Analog Devices

HIGH EFFICIENCY, SYNCHRONOUS, 4-SWITCH BUCK-BOOST CONTROLLER

Deep-Dive with AI

DocumentsDatasheet R526 Reliability Data

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3789IUFD#PBF

Clock Sync	False
Control Features	Current Limit, Power Good, Soft Start, Frequency Control, Enable
Duty Cycle (Max) [Max]	90 %
Frequency - Switching [Max]	640 kHz
Frequency - Switching [Min]	200 kHz
Function	Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	28-WFQFN Exposed Pad
Supplier Device Package	28-QFN (4x5)
Synchronous Rectifier	True
Topology	Buck-Boost
Voltage - Supply (Vcc/Vdd) [Max]	38 V
Voltage - Supply (Vcc/Vdd) [Min]	4 V

LTC3789 Series

High Efficiency, Synchronous, 4-Switch Buck-Boost Controller

Part	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Supplier Device Package	Output Type	Output Configuration	Number of Outputs	Mounting Type	Package / Case	Control Features	Synchronous Rectifier	Frequency - Switching [Min]	Frequency - Switching [Max]	Function	Duty Cycle (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Output Phases	Clock Sync	Topology
Analog Devices LTC3789IGN#TRPBF	38 V	4 V	28-SSOP	Transistor Driver	Positive	2	Surface Mount	28-SSOP	Current Limit Enable Frequency Control Power Good Soft Start		200 kHz	640 kHz	Step-Up/Step-Down	90 %	-40 °C	125 ¯C	1		Buck-Boost
Analog Devices LTC3789IUFD#PBF	38 V	4 V	28-QFN (4x5)	Transistor Driver	Positive	2	Surface Mount	28-WFQFN Exposed Pad	Current Limit Enable Frequency Control Power Good Soft Start		200 kHz	640 kHz	Step-Up/Step-Down	90 %	-40 °C	125 ¯C	1		Buck-Boost

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	$ 16.22
		10	$ 11.63
		25	$ 10.45
		100	$ 9.13
		250	$ 8.50
		500	$ 8.11
		1000	$ 8.03

Description

General part information

LTC3789 Series

The LTC3789 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The constant-frequency, current mode architecture allows a phase-lockable frequency of up to 600kHz, while an output current feedback loop provides support for battery charging. With a wide 4V to 38V (40V maximum) input and output range and seamless, low noise transitions between operating regions, the LTC3789 is ideal for automotive, telecom and battery-powered systems.The operating mode of the controller is determined through the MODE/PLLIN pin. The MODE/PLLIN pin can select between pulse-skipping mode and forced continuous mode operation and allows the IC to be synchronized to an external clock. Pulse-skipping mode offers high efficiency and low ripple at light loads, while forced continuous mode operates at a constant frequency for noise-sensitive applications.A PGOOD pin indicates when the output is within 10% of its designed set point. The LTC3789 is available in low profile 28-pin 4mm × 5mm QFN and narrow SSOP packages.ApplicationsAutomotive SystemsDistributed DC Power SystemsHigh Power Battery-Operated DevicesIndustrial Control