LTC3622
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3622

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 30
1ku List Price Starting From $4.48
Features
  • 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
Additional Details
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The LTC3622 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
Part Name
Frequency VOUT
LTC3622 1.00MHz Adjustable
LTC3622-2 2.25MHz Adjustable
LTC3622-23/5 2.25MHZ 5V/3.3V

 

Applications

  • Battery Powered Systems
  • Point-of-Load Supplies
  • Portable – Handheld Scanners

Part Models 30
1ku List Price Starting From $4.48

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

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

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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

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

Product Detail

Demonstration circuit 2003A is a synchronous step-down regulator using the power-saving LTC3622EDE monolithic buck regulator in a compact 14-pin DFN (4mm × 3mm) package. The DC2003A operates from an input voltage range of 2.7V to 17V and provides dual 1A outputs with an adjustable output voltage range from 1.2V to 5V. The LTC3622 IC quiescent current can be as low as 5μA in Burst Mode® operation with both channels enabled and less than 0.1μA in shutdown mode. The switching frequency is fixed to 1MHz or 2.25MHz with a ±50% synchronization range to an external clock. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency.


 


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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

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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

LTC3622EMSE Demo Board (MSOP) | Dual Sync Buck, 2.7V ≤ VIN ≤ 17V, VOUT1 = 1.2V/1.8V/2.5V @ 1A, VOUT2 = 3.3V/5V @ 1A

Product Detail

Demonstration circuit 2004A is a synchronous step-down regulator using the power-saving LTC3622EMSE monolithic buck regulator in a 16-lead MSE package. The DC2004A operates from an input voltage range of 2.7V to 17V and provides dual 1A outputs with adjustable output voltage range from 1.2V to 5V. The LTC3622 IC quiescent current can be as low as 5μA in Burst Mode® operation with both channels enabled and less than 0.1μA in shutdown mode. The switching frequency is fixed to 1MHz or 2.25MHz with a ±50% synchronization range to an external clock. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency.

Tools & Simulations

Tools & Simulations 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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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