LTC3388
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3388

20V High Efficiency Nanopower Step-Down Regulator

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 16
1ku List Price Starting From $3.54
Features
  • 720nA Input IQ in Regulation (No Load), VIN = 4V
  • 820nA Input IQ in Regulation (No Load), VIN = 20V
  • 400nA Input IQ in UVLO
  • 2.7V to 20V Input Operating Range
  • Up to 50mA of Output Current
  • Pin Selectable Output Voltages:
    • 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1)
    • 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3)
  • High Efficiency Hysteretic Synchronous DC/DC Conversion
  • Standby Mode Disables Buck Switching
  • Available in 10-Lead MSE and 3mm × 3mm DFN Packages
Additional Details
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The LTC3388-1/LTC3388-3 are high efficiency step-down DC/DC converters with internal high side and synchronous power switches that draw only 720nA typical DC supply current at no load while maintaining output voltage regulation.

Capable of supplying 50mA of load current, the LTC3388-1/LTC3388-3 also incorporate an accurate undervoltage lockout (UVLO) feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation. An additional standby mode disables buck switching while the output is in regulation for short duration loads requiring low ripple.

Output voltages of 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) and 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) are pin selectable. The LTC3388-1/LTC3388-3 can operate with VIN up to 20V while the no load quiescent current remains below 1μA.

Applications

  • Keep Alive Power for Portable Products
  • Industrial Control Supplies
  • Distributed Power Systems
  • Battery-Operated Devices
Part Models 16
1ku List Price Starting From $3.54

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3388EDD-1#PBF
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LTC3388EDD-3#PBF
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LTC3388EDD-3#TRPBF
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LTC3388EMSE-1#PBF
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LTC3388EMSE-1#TRPBF
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LTC3388EMSE-3#PBF
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LTC3388EMSE-3#TRPBF
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LTC3388IDD-1#PBF
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LTC3388IDD-1#TRPBF
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LTC3388IDD-3#PBF
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LTC3388IDD-3#TRPBF
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LTC3388IMSE-1#PBF
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LTC3388IMSE-1#TRPBF
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LTC3388IMSE-3#PBF
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LTC3388IMSE-3#TRPBF
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Product Lifecycle

PCN

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3388EMSE-1#PBF

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Part Models

Product Lifecycle

PCN

Feb 4, 2020

- 20_0130

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Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3388EMSE-1#PBF

PRODUCTION

LTC3388EMSE-1#TRPBF

PRODUCTION

LTC3388EMSE-3#PBF

PRODUCTION

LTC3388EMSE-3#TRPBF

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LTC3388IMSE-1#PBF

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LTC3388IMSE-1#TRPBF

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LTC3388IMSE-3#PBF

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LTC3388IMSE-3#TRPBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC1658A-A

LTC3388EMSE-1 Demo Board | 2.7V ≤ VIN ≤ 20V, VOUT = 1.2V to 2.5V @ 50mA

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DC1658A-A

LTC3388EMSE-1 Demo Board | 2.7V ≤ VIN ≤ 20V, VOUT = 1.2V to 2.5V @ 50mA

LTC3388EMSE-1 Demo Board | 2.7V ≤ VIN ≤ 20V, VOUT = 1.2V to 2.5V @ 50mA

Product Detail

Demonstration Circuit DC1658A is a 20V High Efficiency Nanopower Step-Down Regulator featuring the LTC3388-1/ LTC3388-3. The LTC3388 is an ultralow quiescent current power supply designed to regulate the output voltage by means of a nanopower high efficiency synchronous buck regulator. The input current is only 720nA typical at no load while maintaining output voltage regulation, capable of supplying 50mA of load current. The LTC3388-1/ LTC3388-3 also incorporates an accurate undervoltage lockout feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation. An additional standby mode disables the buck switching while the  output is in regulation for short duration loads requiring low ripple.


 


reference details image

DC1658A-B

LTC3388EMSE-3 Demo Board | 2.8V ≤ VIN ≤ 20V, VOUT = 2.8V to 5V @ 50mA

zoom

DC1658A-B

LTC3388EMSE-3 Demo Board | 2.8V ≤ VIN ≤ 20V, VOUT = 2.8V to 5V @ 50mA

LTC3388EMSE-3 Demo Board | 2.8V ≤ VIN ≤ 20V, VOUT = 2.8V to 5V @ 50mA

Product Detail

Demonstration Circuit DC1658A is a 20V High Efficiency Nanopower Step-Down Regulator featuring the LTC3388-1/ LTC3388-3. The LTC3388 is an ultralow quiescent current power supply designed to regulate the output voltage by means of a nanopower high efficiency synchronous buck regulator. The input current is only 720nA typical at no load while maintaining output voltage regulation, capable of supplying 50mA of load current. The LTC3388-1/ LTC3388-3 also in-corporates an accurate undervoltage lockout feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation. An additional standby mode disables the buck switching while the  output is in regulation for short duration loads requiring low ripple.

Tools & Simulations

Tools & Simulations 1

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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