LTC3852
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LTC3852

Low Input Voltage, Synchronous Step-Down DC/DC Controller

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LTspice LTC3852 - Step-Down (Buck) Regulators Download 3.65 KB LTspice LTC3852 Demo Circuit - Low Input Voltage, Synchronous Step-Down Controller (3.3V to 1.5V@15A) Download 5.00KB
Part Models 4
1ku List Price Starting From $2.36
Features
  • Charge Pump Input Range: 2.7V to 5.5V
  • Controller Input Range: 4V to 38V
  • Integrated Charge Pump Provides 5V Gate Drive to Logic Level MOSFETs
  • RSENSE or DCR Current Sensing
  • ±1.25% Output Voltage Accuracy Over Temperature
  • Phase-Lockable Fixed Frequency: 250kHz to 750kHz
  • Power Good Output Voltage Monitor
  • Adjustable Soft-Start Voltage Ramping
  • Current Foldback Disabled During Start-Up
  • No Reverse Current During Soft-Start
  • Selectable Constant Frequency, Pulse-Skipping, or Burst Mode Operation
  • Output Overvoltage Protection
  • Very Low Dropout Operation: 99% Duty Cycle
  • Available in a 24-Lead (3mm × 5mm) QFN Package
Additional Details
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The LTC3852 is a constant frequency, current mode step-down DC/DC controller which can be powered by an on-board charge pump. Input supplies as low as 2.7V, when doubled by the charge pump, provide 5V to the LTC3852’s control logic and gate drives, supporting a wide selection of logic-level N-channel power MOSFETs.

The constant-frequency current mode architecture allows for a phase-lockable fixed frequency of up to 750kHz. The RUN pin provides a precision enable threshold while the TRACK/SS pin combines tracking and adjustable soft-start features.

The MODE/PLLIN pin selects among Burst Mode® operation, pulse-skipping mode, and continuous current mode. Current foldback limits MOSFET power dissipation during short-circuit conditions. Reverse current and current foldback functions are disabled during soft-start. A power good output pin indicates when the output is within ±10% of its designed set point.

Applications

  • General Purpose 3.3V Systems
  • Lithium-Ion Powered Devices
  • Distributed DC Power Systems
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file View Data Sheet
Documentation View All Documentation
LTspice LTC3852 - Step-Down (Buck) Regulators Download 3.65 KB LTspice LTC3852 Demo Circuit - Low Input Voltage, Synchronous Step-Down Controller (3.3V to 1.5V@15A) Download 5.00KB
Part Models 4
1ku List Price Starting From $2.36
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LTC3852

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Data Sheet

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UPDATED 10/18/2010
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LTC3852: Low Input Voltage, Synchronous Step-Down DC/DC Controller Data Sheet

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User Guide

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UPDATED 12/10/2010
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DC1270A -Demo Manual redirect icon

333.00K

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Reliability Data

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UPDATED 03/26/2018
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R526 Reliability Data redirect icon

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Documentation

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. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3852EUDD#PBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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LTC3852EUDD#TRPBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC3852IUDD#PBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC3852IUDD#TRPBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link

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Product Lifecycle

PCN

Nov 8, 2021

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3852EUDD#PBF

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LTC3852EUDD#TRPBF

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Nov 8, 2021

- 20_0245

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Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3852EUDD#PBF

PRODUCTION

LTC3852EUDD#TRPBF

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LTC3852IUDD#PBF

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LTC3852IUDD#TRPBF

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PCN20_0245_Form

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Delta Qualification Matrix

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Software & Part Ecosystem

Parts Product Life Cycle Description

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Evaluation Kits 1

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DC1270A

LTC3852EUDD Demo Board | 2.7V ≤ VIN ≤ 5.5V, VOUT = 1.5V @ 15A

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DC1270A

LTC3852EUDD Demo Board | 2.7V ≤ VIN ≤ 5.5V, VOUT = 1.5V @ 15A

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DC1270A
LTC3852EUDD Demo Board | 2.7V ≤ VIN ≤ 5.5V, VOUT = 1.5V @ 15A
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Product Detail

Demonstration circuit 1270A is a low input voltage, high efficiency synchronous buck DC/DC controller that features the LTC3852EUDD. With a 2.7V to 5.5V input range. It can supply 15A maximum load current at 1.5V output. The integrated charge pump provides 5V to the LTC3852’s control logic and gate drives, supporting a wide selection of logic-level N-channel power MOSFETs with high efficiency.


 


Resources

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DC1270A - Design Files Download

2.00M

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DC1270A -Demo Manual Download

333.00K

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DC1270A - Schematic Download

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Evaluation Kits1

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DC1270A

LTC3852EUDD Demo Board | 2.7V ≤ VIN ≤ 5.5V, VOUT = 1.5V @ 15A

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.

spice tool Lt Spice

LTC3852 - Step-Down (Buck) Regulators Download

3.65 K

spice tool Lt Spice

LTC3852 Demo Circuit - Low Input Voltage, Synchronous Step-Down Controller (3.3V to 1.5V@15A) Download

5.00K

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