LTC3822EGN-1#TRPBF

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Analog Devices Inc./Maxim Integrated

NO RSENSE™, LOW INPUT VOLTAGE, SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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LTC3822EGN-1#TRPBF

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Analog Devices Inc./Maxim Integrated

NO RSENSE™, LOW INPUT VOLTAGE, SYNCHRONOUS STEP-DOWN DC/DC CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3822 Series

The LTC3822-1 is a synchronous step-down switching regulator controller that drives external N-channel power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET VDSsensing eliminates the need for sense resistors and improves efficiency.Burst Mode operation provides high efficiency at light loads. The 99% maximum duty cycle provides low dropout operation, extending operating time in battery-powered systems.The operating frequency can be programmed up to 750kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC3822-1 can be synchronized to an external clock from 250kHz to 750kHz.The LTC3822-1 is available in the tiny footprint thermally enhanced 12-pin DFN package or 16-pin narrow SSOP package.FeaturesLTC3822Internal soft-start, 34µA in sleep modeLTC3822-1External soft start, selectable pulse skip/Burst Mode operation, power good (SSOP-16 package only), 105µA in sleep modeApplicationsSingle Cell Li-Ion Powered Systems3.3VINSystems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3822EGN-1#TRPBF

Clock Sync	Yes
Control Features	Tracking, Power Good, Enable, Soft Start
Duty Cycle (Max)	99 %
Frequency - Switching	300 kHz, 550 kHz, 750 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package Length	0.154 in
Package Name	16-SSOP
Package Width	3.9 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	4.5 V
Voltage - Supply (Vcc/Vdd) Minimum	2.75 V

LTC3822 Series

No RSENSE™, Low Input Voltage, Synchronous Step-Down DC/DC Controller

Part	Output Phases	Function	Package Width	Package Name	Package Length	Topology	Frequency - Switching	Synchronous Rectifier	Number of Outputs	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Operating Temperature (Max)	Operating Temperature (Min)	Output Configuration	Control Features	Output Type	Duty Cycle (Max)	Clock Sync	Mounting Type	Package Features	Package / Case
Analog Devices Inc./Maxim Integrated LTC3822EGN-1#TRPBF	1	Step-Down	3.9 mm	16-SSOP	0.154 in	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Power Good Soft Start Tracking	Transistor Driver	99 %	Yes	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3822EMSE#PBF	1	Step-Down	3 mm	10-MSOP 10-MSOP-EP	0.118 in	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Frequency Control	Transistor Driver	99 %	No	Surface Mount	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3822EDD-1#TRPBF	1	Step-Down	3 mm	12-DFN	3 mm	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Power Good Soft Start Tracking	Transistor Driver	99 %	Yes	Surface Mount		12-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3822EDD#TRPBF	1	Step-Down	3 mm	10-DFN	3 mm	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Frequency Control	Transistor Driver	99 %	No	Surface Mount		10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3822EMSE#TRPBF	1	Step-Down	3 mm	10-MSOP 10-MSOP-EP	0.118 in	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Frequency Control	Transistor Driver	99 %	No	Surface Mount	Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3822EDD#PBF	1	Step-Down	3 mm	10-DFN	3 mm	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Frequency Control	Transistor Driver	99 %	No	Surface Mount		10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3822EDD#PBF	1	Step-Down	3 mm	10-DFN	3 mm	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Frequency Control	Transistor Driver	99 %	No	Surface Mount		10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3822EGN-1#PBF	1	Step-Down	3.9 mm	16-SSOP	0.154 in	Buck	300 kHz 550 kHz 750 kHz	Yes	1	4.5 V	2.75 V	85 °C	-40 °C	Positive	Enable Power Good Soft Start Tracking	Transistor Driver	99 %	Yes	Surface Mount

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3822EGN-1#TRPBF | Datasheet

Tape and Reel Packaging

R421 Reliability Data