LTC3622 - 17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current


  • Dual Step-Down Outputs: 1A Per Channel
  • Wide VIN Range: 2.7V to 17V
  • Wide VOUT Range: 0.6V to VIN
  • Up to 95% Efficiency
  • No-Load IQ = 5μA with Both Channels Enabled; IQ < 4μA with Only One Channel Enabled
  • High Efficiency, Low Dropout Operation (100% Duty Cycle) 
  • Constant Frequency (1MHz/2.25MHz) with External Frequency Synchronization
  • ±1% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Phase Shift Programmable with External Clock
  • Selectable Current Limit
  • Internal Compensation and Soft-Start
  • Compact 14-Pin DFN (3mm × 4mm) and 16-Lead MSOP Packages

Typical Application

LTC3622 Typical Application
LTC3622 Typical Application


The LTC®3622 is a dual 1A output, high efficiency synchronous monolithic step-down regulator capable of operating from input supplies up to 17V. The switching frequency is fixed to 1MHz or 2.25MHz with a ±50% synchronization range to an external clock. The regulator features ultralow quiescent current and high efficiency over a wide output voltage range.

The step-down regulators operate from an input voltage range of 2.7V to 17V and provide an adjustable output from 0.6V to VIN while 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 ripple noise. The switching regulators can be synchronized to an external clock. Furthermore, fixed VOUT options are available to eliminate the external feedback resistors.

LTC3622 Options
LTC3622 1.00MHz Adjustable
LTC3622-2 2.25MHz Adjustable
LTC3622-23/5 2.25MHZ 5V/3.3V



CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC3622EDE-2#PBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3622EDE-2#TRPBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3622EDE-23/5#PBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3622EDE-23/5#TRPBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3622EDE#PBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3622EDE#TRPBF 4x3 DFN-14 DE E 05-08-1708 Yes
LTC3622EMSE-2#PBF MS-16 MS E 05-08-1669 Yes
LTC3622EMSE-2#TRPBF MS-16 MS E 05-08-1669 Yes
LTC3622EMSE#PBF MS-16 MS E 05-08-1669 Yes
LTC3622EMSE#TRPBF MS-16 MS E 05-08-1669 Yes
LTC3622HDE-2#PBF 4x3 DFN-14 DE H 05-08-1708 Yes
LTC3622HDE-2#TRPBF 4x3 DFN-14 DE H 05-08-1708 Yes
LTC3622HDE-23/5#PBF 4x3 DFN-14 DE H 05-08-1708 Yes
LTC3622HDE-23/5#TRPBF 4x3 DFN-14 DE H 05-08-1708 Yes
LTC3622HDE#PBF 4x3 DFN-14 DE H 05-08-1708 Yes
LTC3622HDE#TRPBF 4x3 DFN-14 DE H 05-08-1708 Yes
LTC3622HMSE-2#PBF MS-16 MS H 05-08-1669 Yes
LTC3622HMSE-2#TRPBF MS-16 MS H 05-08-1669 Yes
LTC3622HMSE#PBF MS-16 MS H 05-08-1669 Yes
LTC3622HMSE#TRPBF MS-16 MS H 05-08-1669 Yes
LTC3622IDE-2#PBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3622IDE-2#TRPBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3622IDE-23/5#PBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3622IDE-23/5#TRPBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3622IDE#PBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3622IDE#TRPBF 4x3 DFN-14 DE I 05-08-1708 Yes
LTC3622IMSE-2#PBF MS-16 MS I 05-08-1669 Yes
LTC3622IMSE-2#TRPBF MS-16 MS I 05-08-1669 Yes
LTC3622IMSE#PBF MS-16 MS I 05-08-1669 Yes
LTC3622IMSE#TRPBF MS-16 MS I 05-08-1669 Yes

LTC3622 Package Drawing
LTC3622 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC3622EDE-2#PBF 4x3 DFN-14 E $5.36 $3.75 Yes
LTC3622EDE-2#TRPBF 4x3 DFN-14 E $3.81 Yes
LTC3622EDE-23/5#PBF 4x3 DFN-14 E $5.36 $3.75 Yes
LTC3622EDE-23/5#TRPBF 4x3 DFN-14 E $3.81 Yes
LTC3622EDE#PBF 4x3 DFN-14 E $5.36 $3.75 Yes
LTC3622EDE#TRPBF 4x3 DFN-14 E $3.81 Yes
LTC3622EMSE-2#PBF MS-16 E $5.36 $3.75 Yes
LTC3622EMSE-2#TRPBF MS-16 E $3.81 Yes
LTC3622EMSE#PBF MS-16 E $5.36 $3.75 Yes
LTC3622EMSE#TRPBF MS-16 E $3.81 Yes
LTC3622HDE-2#PBF 4x3 DFN-14 H $6.26 $4.38 Yes
LTC3622HDE-2#TRPBF 4x3 DFN-14 H $4.44 Yes
LTC3622HDE-23/5#PBF 4x3 DFN-14 H $6.26 $4.38 Yes
LTC3622HDE-23/5#TRPBF 4x3 DFN-14 H $4.44 Yes
LTC3622HDE#PBF 4x3 DFN-14 H $6.26 $4.38 Yes
LTC3622HDE#TRPBF 4x3 DFN-14 H $4.44 Yes
LTC3622HMSE-2#PBF MS-16 H $6.26 $4.38 Yes
LTC3622HMSE-2#TRPBF MS-16 H $4.44 Yes
LTC3622HMSE#PBF MS-16 H $6.26 $4.38 Yes
LTC3622HMSE#TRPBF MS-16 H $4.44 Yes
LTC3622IDE-2#PBF 4x3 DFN-14 I $5.93 $4.15 Yes
LTC3622IDE-2#TRPBF 4x3 DFN-14 I $4.21 Yes
LTC3622IDE-23/5#PBF 4x3 DFN-14 I $5.90 $4.13 Yes
LTC3622IDE-23/5#TRPBF 4x3 DFN-14 I $4.19 Yes
LTC3622IDE#PBF 4x3 DFN-14 I $5.93 $4.15 Yes
LTC3622IDE#TRPBF 4x3 DFN-14 I $4.21 Yes
LTC3622IMSE-2#PBF MS-16 I $5.90 $4.13 Yes
LTC3622IMSE-2#TRPBF MS-16 I $4.19 Yes
LTC3622IMSE#PBF MS-16 I $5.90 $4.13 Yes
LTC3622IMSE#TRPBF MS-16 I $4.19 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC2003A LTC3622 Demo Board (DFN) | Dual Sync Buck, 2.7V ≤ VIN ≤ 17V, Vout1 = 1.2V/1.8V/2.5V/3.3V @ 1A, Vout2 = 1.5V/1.8V/3.3V/5V @ 1A $100.00
DC2004A LTC3622EMSE Demo Board (MSOP) | Dual Sync Buck, 2.7V ≤ VIN ≤ 17V, Vout1 = 1.2V/1.8V/2.5V @ 1A, Vout2 = 3.3V/5V @ 1A Contact Factory
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