LTC3839EUH#PBF

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Analog Devices Inc./Maxim Integrated

FAST, ACCURATE, 2-PHASE, SINGLE-OUTPUT STEP-DOWN DC/DC CONTROLLER WITH DIFFERENTIAL OUTPUT SENSING

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LTC3839EUH#PBF

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Analog Devices Inc./Maxim Integrated

FAST, ACCURATE, 2-PHASE, SINGLE-OUTPUT STEP-DOWN DC/DC CONTROLLER WITH DIFFERENTIAL OUTPUT SENSING

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3839 Series

The LTC3839 is a 2-phase, single-output PolyPhase®synchronous step-down switching regulator controller that drives all N-channel power MOSFETs. The controlled on-time, valley current mode control architecture allows for fast transient response and constant frequency switching in steady-state operation, independent of VIN, VOUTand load current. Its load-release transient detection feature significantly reduces overshoot at low output voltages.Differential output voltage sensing, along with a precision internal reference, offers an accurate ±0.67% output regulation, even if the remote output ground deviates from local ground by ±500mV.The switching frequency can be programmed from 200kHz to 2MHz with an external resistor and can be synchronized to an external clock. Very low tONand tOFFtimes allow for near 0% and near 100% duty cycles, respectively. Voltage tracking soft start-up and multiple safety features are provided.ApplicationsDistributed Power SystemsPoint-of-Load ConvertersComputing SystemsData Communication Systems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3839EUH#PBF

Clock Sync	No
Control Features	Soft Start, Tracking, Phase Control, Enable, Power Good, Frequency Control
Frequency - Switching (Max)	2 MHz
Frequency - Switching (Min)	200 kHz
Function	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	2
Output Type	Transistor Driver
Package / Case	32-WFQFN Exposed Pad
Package Length	5 mm
Package Name	32-QFN
Package Width	5 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	38 V
Voltage - Supply (Vcc/Vdd) Minimum	4.5 V

LTC3839 Series

Part	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Function	Output Configuration	Synchronous Rectifier	Clock Sync	Package / Case	Output Phases	Output Type	Control Features	Frequency - Switching (Max)	Frequency - Switching (Min)	Mounting Type	Operating Temperature (Max)	Operating Temperature (Min)	Number of Outputs	Package Width	Package Name	Package Length	Topology
Analog Devices Inc./Maxim Integrated LTC3839EUH#PBF	38 V	4.5 V	Step-Down	Positive	Yes	No	32-WFQFN Exposed Pad	2	Transistor Driver	Enable Frequency Control Phase Control Power Good Soft Start Tracking	2 MHz	200 kHz	Surface Mount	125 °C	-40 °C	2	5 mm	32-QFN	5 mm	Buck
Analog Devices Inc./Maxim Integrated LTC3839IUH#TRPBF	38 V	4.5 V	Step-Down	Positive	Yes	No	32-WFQFN Exposed Pad	2	Transistor Driver	Enable Frequency Control Phase Control Power Good Soft Start Tracking	2 MHz	200 kHz	Surface Mount	125 °C	-40 °C	2	5 mm	32-QFN	5 mm	Buck
Analog Devices Inc./Maxim Integrated LTC3839EUH#TRPBF	38 V	4.5 V	Step-Down	Positive	Yes	No	32-WFQFN Exposed Pad	2	Transistor Driver	Enable Frequency Control Phase Control Power Good Soft Start Tracking	2 MHz	200 kHz	Surface Mount	125 °C	-40 °C	2	5 mm	32-QFN	5 mm	Buck
Analog Devices Inc./Maxim Integrated LTC3839IUH#PBF	38 V	4.5 V	Step-Down	Positive	Yes	No	32-WFQFN Exposed Pad	2	Transistor Driver	Enable Frequency Control Phase Control Power Good Soft Start Tracking	2 MHz	200 kHz	Surface Mount	125 °C	-40 °C	2	5 mm	32-QFN	5 mm	Buck

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3839EUH#PBF | Datasheet

R526 Reliability Data