Specification	LTC3789EUFD#PBF

Clock Sync	False
Control Features	Frequency Control, Power Good, Current Limit, Soft Start, 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	Supplier Device Package	Package / Case [x]	Package / Case [y]	Package / Case	Number of Outputs	Mounting Type	Output Configuration	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Frequency - Switching [Min]	Frequency - Switching [Max]	Output Type	Control Features	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Output Phases	Function	Duty Cycle (Max) [Max]
Analog Devices Inc./Maxim Integrated LTC3789EGN#PBF	28-SSOP	0.154 in	3.9 mm	28-SSOP	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %
Analog Devices Inc./Maxim Integrated LTC3789EUFD#PBF	28-QFN (4x5)			28-WFQFN Exposed Pad	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %
Analog Devices Inc./Maxim Integrated LTC3789EUFD#TRPBF	28-QFN (4x5)			28-WFQFN Exposed Pad	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %
Analog Devices Inc./Maxim Integrated LTC3789IUFD#TRPBF	28-QFN (4x5)			28-WFQFN Exposed Pad	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %
Analog Devices Inc./Maxim Integrated LTC3789EGN#TRPBF	28-SSOP	0.154 in	3.9 mm	28-SSOP	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %
Analog Devices Inc./Maxim Integrated LTC3789IGN#PBF	28-SSOP	0.154 in	3.9 mm	28-SSOP	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %
Analog Devices Inc./Maxim Integrated LTC3789IGN#TRPBF	28-SSOP	0.154 in	3.9 mm	28-SSOP	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %
Analog Devices Inc./Maxim Integrated LTC3789IUFD#PBF	28-QFN (4x5)			28-WFQFN Exposed Pad	2	Surface Mount	Positive	4 V	38 V	200 kHz	640 kHz	Transistor Driver	Current Limit Enable Frequency Control Power Good Soft Start	-40 C	125 °C	Buck-Boost	1	Step-Up/Step-Down	90 %

Pricing

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

Distributor	Package	Quantity	$	Updated

Arrow	N/A	1	$ 13.55	1m+
		10	$ 9.36
		25	$ 9.20
		73	$ 6.78
Digikey	N/A	422	$ 13.74	1m+
Mouser	N/A	1	$ 12.42	1m+
		10	$ 9.62
		25	$ 9.09
		73	$ 7.45
		292	$ 7.36
		511	$ 7.30
		1022	$ 7.23
Newark	Each	1	$ 13.74	1m+
		10	$ 9.52
		25	$ 8.82
		50	$ 8.12
		146	$ 7.42
		292	$ 7.00

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

Documents

Technical documentation and resources

LTC3789EUFD#PBF | Datasheet

Datasheet

R526 Reliability Data

Reliability Data