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LTC3388: 20V High Efficiency Nanopower Step-Down Regulator Data Sheet8/10/2015PDF371K
Overview
Features and Benefits
- 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
Product Details
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
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Documentation & Resources
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DC1658A - Demo Manual4/5/2016PDF198K
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Energy Harvesting with Low Power Solar Panels2/4/2013
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Easy, ±5V Split-Voltage Power Supply for Analog Circuits Draws Only 720nA at No Load7/1/2011 LT Journal
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Nanopower Buck Converter Runs on 720nA, Easily Fits into Energy Harvesting and Other Low Power Applications1/1/2011 LT Journal
Tools & Simulations
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.
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.
Models for the following parts are available in LTspice:
LTC3388-1
LTC3388-3
Design Resources
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.
PCN-PDN Information
Sample & Buy
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Lead Times
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Sampling
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.