LTC3622

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. D) Product Selection Table
Part Models
30
1ku List Price
Starting From $4.48
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Part Details

  • 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
LTC3622
17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current
2.5V/5V VOUT Application, fSW = 1MHz Efficiency vs Load Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Design Note 1

Technical Articles 1

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2977
RECOMMENDED FOR NEW DESIGNS 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
PowerPath, Ideal Diodes, and Load Switches 1
LTC4417
RECOMMENDED FOR NEW DESIGNS Prioritized PowerPath™ Controller
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3622
  • LTC3622-2

LTpowerCAD 2

LTspice

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

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

eval board
schematic 1
schematic 2
schematic 3
schematic 4
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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Product Details

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.


 


eval board
schematic 5
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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Product Details

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.
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
DC2003A Evaluation Board DC2003A Evaluation Board - Top View DC2003A Evaluation Board - Bottom View DC2003A - Schematic
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
DC2004A - Schematic

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