LTC3621IMS8E-3.3#TRPBF

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Analog Devices Inc./Maxim Integrated

CONV DC-DC 2.7V TO 17V SYNCHRONOUS STEP DOWN SINGLE-OUT 3.3V 1A 8-PIN MSOP EP T/R

LTC3621IMS8E-3.3#TRPBF

Active

Analog Devices Inc./Maxim Integrated

CONV DC-DC 2.7V TO 17V SYNCHRONOUS STEP DOWN SINGLE-OUT 3.3V 1A 8-PIN MSOP EP T/R

Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3621 Series

The LTC3621/LTC3621-2 is a high efficiency 17V, 1A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz or 2.25MHz with a ±40% synchronizing range. The regulator features ultralow quiescent current and high efficiencies over a wide VOUTrange.The step-down regulator operates from an input voltage range of 2.7V to 17V and provides an adjustable output range from 0.6V to VINwhile delivering up to 1A of output current. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest voltage ripple. The MODE pin can also be used to allow the user to sync the switching frequency to an external clock.LTC3621 OptionsPart NameFrequencyVOUTLTC36211.00MHzAdjustableLTC3621-3.31.00MHz3.3VLTC3621-51.00MHz5VLTC3621-22.25MHzAdjustableLTC3621-23.32.25MHz3.3LTC3621-252.25MHz5VAPPLICATIONSPortable-Handheld ScannersIndustrial and Embedded ComputingAutomotive ApplicationsEmergency Radio

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3621IMS8E-3.3#TRPBF

Current - Output	1 A
Frequency - Switching	1 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Fixed
Package Features	Exposed Pad
Package Length	0.118 in
Package Name	8-MSOP, 8-TSSOP, 8-MSOP-EP
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	17 V
Voltage - Input (Min)	2.7 V
Voltage - Output (Min/Fixed)	3.3 V

LTC3621 Series

17V, 1A Synchronous Step-Down Regulator with 3.5μA Quiescent Current

Part	Current - Output	Mounting Type	Output Configuration	Voltage - Output (Max)	Voltage - Input (Max)	Operating Temperature (Max)	Operating Temperature (Min)	Number of Outputs	Package Width	Package Name	Package Length	Output Type	Voltage - Input (Min)	Topology	Function	Synchronous Rectifier	Frequency - Switching	Voltage - Output (Min/Fixed)	Package / Case	Package Features
Analog Devices Inc./Maxim Integrated LTC3621IDCB#TRMPBF	1 A	Surface Mount	Positive	17 V	17 V	125 °C	-40 °C	1	3 mm	6-DFN	2 mm	Adjustable	2.7 V	Buck	Step-Down	Yes	1 MHz	0.6 V	6-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621IDCB-2#TRMPBF	1 A	Surface Mount	Positive	17 V	17 V	125 °C	-40 °C	1	3 mm	6-DFN	2 mm	Adjustable	2.7 V	Buck	Step-Down	Yes	2.25 MHz	0.6 V	6-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621IDCB-3.3#TRMPBF	1 A	Surface Mount	Positive		17 V	125 °C	-40 °C	1	3 mm	6-DFN	2 mm	Fixed	2.7 V	Buck	Step-Down	Yes	1 MHz	3.3 V	6-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621IMS8E-3.3#TRPBF	1 A	Surface Mount	Positive		17 V	125 °C	-40 °C	1	3 mm	8-MSOP 8-MSOP-EP 8-TSSOP	0.118 in	Fixed	2.7 V	Buck	Step-Down	Yes	1 MHz	3.3 V		Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621EMS8E-5#TRPBF	1 A	Surface Mount	Positive		17 V	125 °C	-40 °C	1	3 mm	8-MSOP 8-MSOP-EP 8-TSSOP	0.118 in	Fixed	2.7 V	Buck	Step-Down	Yes	1 MHz	5 V		Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621HMS8E#TRPBF	1 A	Surface Mount	Positive	17 V	17 V	150 °C	-40 °C	1	3 mm	8-MSOP 8-MSOP-EP 8-TSSOP	0.118 in	Adjustable	2.7 V	Buck	Step-Down	Yes	1 MHz	0.6 V		Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621HMS8E-2#PBF	1 A	Surface Mount	Positive	17 V	17 V	150 °C	-40 °C	1	3 mm	8-MSOP 8-MSOP-EP 8-TSSOP	0.118 in	Adjustable	2.7 V	Buck	Step-Down	Yes	2.25 MHz	0.6 V		Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621HMS8E-23.3#PBF	1 A	Surface Mount	Positive		17 V	150 °C	-40 °C	1	3 mm	8-MSOP 8-MSOP-EP 8-TSSOP	0.118 in	Fixed	2.7 V	Buck	Step-Down	Yes	2.25 MHz	3.3 V		Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621EMS8E#PBF	1 A	Surface Mount	Positive	17 V	17 V	125 °C	-40 °C	1	3 mm	8-MSOP 8-MSOP-EP 8-TSSOP	0.118 in	Adjustable	2.7 V	Buck	Step-Down	Yes	1 MHz	0.6 V		Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3621IDCB-25#TRPBF	1 A	Surface Mount	Positive		17 V	125 °C	-40 °C	1	3 mm	6-DFN	2 mm	Fixed	2.7 V	Buck	Step-Down	Yes	2.25 MHz	5 V	6-WFDFN Exposed Pad

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R539 Reliability Data

LTC3621/LTC3621-2: 17V, 1A Synchronous Step-Down Regulator with 3.5μA Quiescent Current Data Sheet (Rev.D)

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