LTC3789EUFD#TRPBF

Active

Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, SYNCHRONOUS BUCK-BOOST, 4V TO 38V, 1 OUTPUT, 90% DUTY CYCLE, 640KHZ, QFN-EP-28

LTC3789EUFD#TRPBF

Active

Analog Devices Inc./Maxim Integrated

DC/DC CONTROLLER, SYNCHRONOUS BUCK-BOOST, 4V TO 38V, 1 OUTPUT, 90% DUTY CYCLE, 640KHZ, QFN-EP-28

Description Specifications Series Pricing CAD Documents

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

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3789EUFD#TRPBF

Clock Sync	No
Control Features	Soft Start, Current Limit, Frequency Control, Enable, Power Good
Duty Cycle (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
Package Length	4 mm
Package Name	28-QFN
Package Width	5 mm
Synchronous Rectifier	Yes
Topology	Buck-Boost
Voltage - Supply (Vcc/Vdd) Maximum	38 V
Voltage - Supply (Vcc/Vdd) Minimum	4 V

LTC3789 Series

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

Part	Duty Cycle (Max)	Function	Output Phases	Topology	Operating Temperature (Max)	Operating Temperature (Min)	Control Features	Synchronous Rectifier	Output Type	Frequency - Switching (Min)	Frequency - Switching (Max)	Clock Sync	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Output Configuration	Mounting Type	Number of Outputs	Package Length	Package Name	Package Width	Package / Case
Analog Devices Inc./Maxim Integrated LTC3789EGN#PBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	0.154 in	28-SSOP	3.9 mm
Analog Devices Inc./Maxim Integrated LTC3789EUFD#PBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	4 mm	28-QFN	5 mm	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3789EUFD#TRPBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	4 mm	28-QFN	5 mm	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3789IUFD#TRPBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	4 mm	28-QFN	5 mm	28-WFQFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3789EGN#TRPBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	0.154 in	28-SSOP	3.9 mm
Analog Devices Inc./Maxim Integrated LTC3789IGN#PBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	0.154 in	28-SSOP	3.9 mm
Analog Devices Inc./Maxim Integrated LTC3789IGN#TRPBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	0.154 in	28-SSOP	3.9 mm
Analog Devices Inc./Maxim Integrated LTC3789IUFD#PBF	90 %	Step-Down Step-Up	1	Buck-Boost	125 °C	-40 °C	Current Limit Enable Frequency Control Power Good Soft Start	Yes	Transistor Driver	200 kHz	640 kHz	No	4 V	38 V	Positive	Surface Mount	2	4 mm	28-QFN	5 mm	28-WFQFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R526 Reliability Data

LTC3789EUFD#TRPBF | Datasheet