LTC3772EDDB#TRPBF

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Analog Devices Inc./Maxim Integrated

MICROPOWER NO RSENSECONSTANT FREQUENCY STEP-DOWN DC/DC CONTROLLER

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LTC3772EDDB#TRPBF

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Analog Devices Inc./Maxim Integrated

MICROPOWER NO RSENSECONSTANT FREQUENCY STEP-DOWN DC/DC CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3772 Series

The LTC3772 is a constant frequency current mode step-down DC/DC controller in a low profile 8-lead SOT-23 (ThinSOT™) and a 3mm × 2mm DFN package. The No RSENSE™architecture eliminates the need for a current sense resistor, improving efficiency and saving board space.The LTC3772 automatically switches into Burst Mode operation at light loads to increase efficiency at low output current. It consumes only 40µA of quiescent current under a no-load condition.The LTC3772 incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2V. To maximize the runtime from a battery source, the external P-channel MOSFET is turned on continuously in dropout (100% duty cycle). High switching frequency of 550kHz allows the use of a small inductor and capacitors. An internal soft-start smoothly ramps the output voltage from zero to its regulation point.Burst ModeLTC3772YesLTC3772BNoApplications1- or 2-Cell Li-Ion Battery-Powered ApplicationsWireless DevicesPortable ComputersDistributed Power Systems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3772EDDB#TRPBF

Clock Sync	No
Control Features	Enable, Current Limit
Duty Cycle (Max)	100 %
Frequency - Switching	550 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 / Case	8-WFDFN Exposed Pad
Package Length	3 mm
Package Name	8-DFN
Package Width	2 mm
Synchronous Rectifier	No
Topology	Buck
Voltage - Supply (Vcc/Vdd) Maximum	9.8 V
Voltage - Supply (Vcc/Vdd) Minimum	2.75 V

LTC3772 Series

Micropower No RSENSEConstant Frequency Step-Down DC/DC Controller

Part	Number of Outputs	Output Configuration	Synchronous Rectifier	Clock Sync	Duty Cycle (Max)	Package / Case	Operating Temperature (Max)	Operating Temperature (Min)	Topology	Mounting Type	Function	Package Width	Package Name	Package Length	Frequency - Switching	Control Features	Output Type	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Output Phases	Frequency - Switching (Max)	Frequency - Switching (Min)
Analog Devices Inc./Maxim Integrated LTC3772EDDB#TRMPBF	1	Positive	No	No	100 %	8-WFDFN Exposed Pad	85 °C	-40 °C	Buck	Surface Mount	Step-Down	2 mm	8-DFN	3 mm	550 kHz	Current Limit Enable	Transistor Driver	2.75 V	9.8 V	1
Analog Devices Inc./Maxim Integrated LTC3772ETS8#TRPBF	1	Positive	No	No	100 %	SOT-23-8 Thin TSOT-23-8	85 °C	-40 °C	Buck	Surface Mount	Step-Down		TSOT-23-8		550 kHz	Current Limit Enable	Transistor Driver	2.75 V	9.8 V	1
Analog Devices Inc./Maxim Integrated LTC3772EDDB#TRPBF	1	Positive	No	No	100 %	8-WFDFN Exposed Pad	85 °C	-40 °C	Buck	Surface Mount	Step-Down	2 mm	8-DFN	3 mm	550 kHz	Current Limit Enable	Transistor Driver	2.75 V	9.8 V	1
Analog Devices Inc./Maxim Integrated LTC3772BEDDB#TRPBF	1	Positive	No	No	100 %	8-WFDFN Exposed Pad	85 °C	-40 °C	Buck	Surface Mount	Step-Down	2 mm	8-DFN	3 mm		Current Limit Enable	Transistor Driver	2.75 V	9.8 V	1	550 kHz	200 kHz
Analog Devices Inc./Maxim Integrated LTC3772ETS8#TRMPBF	1	Positive	No	No	100 %	SOT-23-8 Thin TSOT-23-8	85 °C	-40 °C	Buck	Surface Mount	Step-Down		TSOT-23-8		550 kHz	Current Limit Enable	Transistor Driver	2.75 V	9.8 V	1

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R421 Reliability Data

LTC3772EDDB#TRPBF | Datasheet