LTC3624
LTC3624-2

RECOMMENDED FOR NEW DESIGNS

17V, 2A Synchronous Step-Down Regulator with 3.5μA Quiescent Current

Part Models: 60
1ku List Price: Starting From $3.54

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Part Details

Wide V_IN Range: 2.7V to 17V
Wide V_OUT Range: 0.6V to V_IN
95% Max Efficiency
Low I_Q: 3.5μA, Zero-Current Shutdown
Constant Frequency (1MHz/2.25MHz)
Fixed V_OUT Options Available
Low Dropout Operation (100% Duty Cycle) with Ultralow I_Q
2A Rated Output Current
±1% Output Voltage Accuracy
Current Mode Operation for Excellent Line and Load Transient Response
Synchronizable to External Clock
Pulse-Skipping, Forced Continuous, Burst Mode^® Operation
Internal Compensation and Soft-Start
Overtemperature Protection
Compact 8-Lead DFN (3mm × 3mm) Package

The LTC3624/LTC3624-2 is a high efficiency 17V, 2A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz (LTC3624) or 2.25MHz (LTC3624-2) with a ±40% synchronization range. The regulator features ultralow quiescent current and high efficiency over a wide V_OUT range.

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 V_IN while delivering up to 2A 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 sync the switching frequency to an external clock.

LTC3624/LTC3624-2 Options


Part Number	Frequency	V_OUT
LTC3624	1MHz	Adjustable
LTC3624-3.3	1MHz	3.3V
LTC3624-5	1MHz	5V
LTC3624-2	2.25MHz	Adjustable
LTC3624-23.3	2.25MHz	3.3
LTC3624-25	2.25MHz	5V

Applications

Battery Powered Equipment
Portable Instrumentation
Emergency Radios
General Purpose Step-Down Supplies

Part Models: 60
1ku List Price: Starting From $3.54

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3624EDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-2#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-2#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-23.3#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-23.3#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-25#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-25#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-3.3#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-3.3#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-5#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EDD-5#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-2#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-2#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-23.3#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-23.3#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-25#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-25#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-3.3#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-3.3#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-5#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624EMSE-5#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-2#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-2#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-23.3#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-23.3#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-25#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-25#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-3.3#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-3.3#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-5#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624HMSE-5#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-2#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-2#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-23.3#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-23.3#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-25#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-25#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-3.3#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-3.3#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-5#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IDD-5#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-2#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-2#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-23.3#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-23.3#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-25#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-25#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-3.3#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-3.3#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-5#PBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3624IMSE-5#TRPBF	12-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process
		PCN19_0067_Form Material_Report Delta Qualification Matrix Qualification Results Summary Detailed Parts List Other
LTC3624EDD#PBF	PRODUCTION
LTC3624EDD#TRPBF	PRODUCTION
LTC3624EDD-2#PBF	PRODUCTION
LTC3624EDD-2#TRPBF	PRODUCTION
LTC3624EDD-23.3#PBF	PRODUCTION
LTC3624EDD-23.3#TRPBF	PRODUCTION
LTC3624EDD-25#PBF	PRODUCTION
LTC3624EDD-25#TRPBF	PRODUCTION
LTC3624EDD-3.3#PBF	PRODUCTION
LTC3624EDD-3.3#TRPBF	PRODUCTION
LTC3624EDD-5#PBF	PRODUCTION
LTC3624EDD-5#TRPBF	PRODUCTION
LTC3624EMSE#PBF	PRODUCTION
LTC3624EMSE#TRPBF	PRODUCTION
LTC3624EMSE-2#PBF	PRODUCTION
LTC3624EMSE-2#TRPBF	PRODUCTION
LTC3624EMSE-23.3#PBF	PRODUCTION
LTC3624EMSE-23.3#TRPBF	PRODUCTION
LTC3624EMSE-25#PBF	PRODUCTION
LTC3624EMSE-25#TRPBF	PRODUCTION
LTC3624EMSE-3.3#PBF	PRODUCTION
LTC3624EMSE-3.3#TRPBF	PRODUCTION
LTC3624EMSE-5#PBF	PRODUCTION
LTC3624EMSE-5#TRPBF	PRODUCTION
LTC3624HMSE#PBF	PRODUCTION
LTC3624HMSE#TRPBF	PRODUCTION
LTC3624HMSE-2#PBF	PRODUCTION
LTC3624HMSE-2#TRPBF	PRODUCTION
LTC3624HMSE-23.3#PBF	PRODUCTION
LTC3624HMSE-23.3#TRPBF	PRODUCTION
LTC3624HMSE-25#PBF	PRODUCTION
LTC3624HMSE-25#TRPBF	PRODUCTION
LTC3624HMSE-3.3#PBF	PRODUCTION
LTC3624HMSE-3.3#TRPBF	PRODUCTION
LTC3624HMSE-5#PBF	PRODUCTION
LTC3624HMSE-5#TRPBF	PRODUCTION
LTC3624IDD#PBF	PRODUCTION
LTC3624IDD#TRPBF	PRODUCTION
LTC3624IDD-2#PBF	PRODUCTION
LTC3624IDD-2#TRPBF	PRODUCTION
LTC3624IDD-23.3#PBF	PRODUCTION
LTC3624IDD-23.3#TRPBF	PRODUCTION
LTC3624IDD-25#PBF	PRODUCTION
LTC3624IDD-25#TRPBF	PRODUCTION
LTC3624IDD-3.3#PBF	PRODUCTION
LTC3624IDD-3.3#TRPBF	PRODUCTION
LTC3624IDD-5#PBF	PRODUCTION
LTC3624IDD-5#TRPBF	PRODUCTION
LTC3624IMSE#PBF	PRODUCTION
LTC3624IMSE#TRPBF	PRODUCTION
LTC3624IMSE-2#PBF	PRODUCTION
LTC3624IMSE-2#TRPBF	PRODUCTION
LTC3624IMSE-23.3#PBF	PRODUCTION
LTC3624IMSE-23.3#TRPBF	PRODUCTION
LTC3624IMSE-25#PBF	PRODUCTION
LTC3624IMSE-25#TRPBF	PRODUCTION
LTC3624IMSE-3.3#PBF	PRODUCTION
LTC3624IMSE-3.3#TRPBF	PRODUCTION
LTC3624IMSE-5#PBF	PRODUCTION
LTC3624IMSE-5#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0129_Form Material_Report
LTC3624EMSE#PBF	PRODUCTION
LTC3624EMSE#TRPBF	PRODUCTION
LTC3624EMSE-2#PBF	PRODUCTION
LTC3624EMSE-2#TRPBF	PRODUCTION
LTC3624EMSE-23.3#PBF	PRODUCTION
LTC3624EMSE-23.3#TRPBF	PRODUCTION
LTC3624EMSE-25#PBF	PRODUCTION
LTC3624EMSE-25#TRPBF	PRODUCTION
LTC3624EMSE-3.3#PBF	PRODUCTION
LTC3624EMSE-3.3#TRPBF	PRODUCTION
LTC3624EMSE-5#PBF	PRODUCTION
LTC3624EMSE-5#TRPBF	PRODUCTION
LTC3624HMSE#PBF	PRODUCTION
LTC3624HMSE#TRPBF	PRODUCTION
LTC3624HMSE-2#PBF	PRODUCTION
LTC3624HMSE-2#TRPBF	PRODUCTION
LTC3624HMSE-23.3#PBF	PRODUCTION
LTC3624HMSE-23.3#TRPBF	PRODUCTION
LTC3624HMSE-25#PBF	PRODUCTION
LTC3624HMSE-25#TRPBF	PRODUCTION
LTC3624HMSE-3.3#PBF	PRODUCTION
LTC3624HMSE-3.3#TRPBF	PRODUCTION
LTC3624HMSE-5#PBF	PRODUCTION
LTC3624HMSE-5#TRPBF	PRODUCTION
LTC3624IMSE#PBF	PRODUCTION
LTC3624IMSE#TRPBF	PRODUCTION
LTC3624IMSE-2#PBF	PRODUCTION
LTC3624IMSE-2#TRPBF	PRODUCTION
LTC3624IMSE-23.3#PBF	PRODUCTION
LTC3624IMSE-23.3#TRPBF	PRODUCTION
LTC3624IMSE-25#PBF	PRODUCTION
LTC3624IMSE-25#TRPBF	PRODUCTION
LTC3624IMSE-3.3#PBF	PRODUCTION
LTC3624IMSE-3.3#TRPBF	PRODUCTION
LTC3624IMSE-5#PBF	PRODUCTION
LTC3624IMSE-5#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
PowerPath, Ideal Diodes, and Load Switches 1
LTC4417	RECOMMENDED FOR NEW DESIGNS	Prioritized PowerPath^™ Controller
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller

Tools & Simulations

LTspice 4

Models for the following parts are available in LTspice:

LTC3624
LTC3624-2

LTpowerCAD 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LTC3624 Demo Board (MSOP) | Micropower Synchronous Buck, 2.7V ≤ VIN ≤ 17V, VOUT = 1.2V/1.8V/2.5V/3.3V/5V @ 2A

Buy Now View Details

Product Details

Demonstration circuit 2359A is a synchronous step-down regulator using LTC3624HMSE monolithic buck regulator in the MSOP-12E package. The DC2359A operates from an input voltage range of 2.7V to 17V and provides and jumper-selectable output voltage range from 1.2V to 5V (V_OUT < V_IN) at 2A of continuous output current. A user-selectable MODE input pin is provided with the following options: Burst Mode^® operation provides the highest efficiency at light loads, while Pulse-Skipping mode (PS) provides the lowest output voltage ripples. Forced Continuous mode (FC) is also available for low EMI and noise interference.

Resources

DC2359A - Demo Manual
478.00K

DC2359A - Schematic
33.00K

DC2359A - Design Files
2.00M

LTC3624 Demo Board (DFN) | Micropower Sync Buck, 2.7V ≤ VIN ≤ 17V, VOUT = 1.2V/1.8V/2.5V/3.3V/5V/Adjustable @ 2A

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Product Details

Demonstration circuit DC2005A is a synchronous stepdown regulator using an LTC3624 monolithic buck regulator in the 3x3 DFN-8 package. The DC2005A operates from an input voltage range of 2.7V to 17V and provides an adjustable output voltage range from 1.2V to 5V (V_OUT < V_IN) at 2A of output current. A user-selectable MODE input pin is provided to allow the user to trade off ripple noise for light load efficiency.