LTC3878
Info: : PRODUCTION
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LTC3878

Fast, Wide Operating Range No RSENSE Step-Down DC/DC Controller

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $2.09
Features
  • Wide VIN Range: 4V to 38V
  • ±1% 0.8V Voltage Reference
  • Extremely Fast Transient Response
  • tON(MIN): 43ns
  • No RSENSE Valley Current Mode Control
  • Stable with Low ESR Ceramic COUT
  • Supports Smooth Start-Up Into Pre-Biased Output
  • Optimized for High Step-Down Ratios
  • Pin Compatible with the LTC1778 (No EXTVCC Pin)
  • Power Good Output Voltage Monitor
  • Dual N-Channel MOSFET Synchronous Drive
  • Adjustable Switching Frequency
  • Programmable Current Limit with Foldback
  • Output Overvoltage Protection
  • Small 16-Pin Narrow SSOP Package
Additional Details
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The LTC3878 is a synchronous step-down switching DC/DC controller optimized for high switching frequency and fast transient response. The constant on-time valley current mode architecture allows for a wide input range, including very low duty factor operation. No external sense resistor or slope compensation is required. The LTC3878 is pin compatible with the LTC1778 in applications that do not use EXTVCC while offering better efficiency. Consult with the factory to verify compatibility.

Operating frequency is set by an external resistor and compensated for variations in VIN to offer excellent line stability. Discontinuous mode operation provides high efficiency during light load conditions. A forced continuous control pin allows the user to reduce noise and RF interference. Safety features include output overvoltage protection and programmable current limit with foldback. Soft-start capability for supply sequencing is accomplished through an external timing capacitor. The current limit is user programmable.

The LTC3878 allows operation from 4V to 38V at the input and from 0.8V to 90% VIN at the output. The LTC3878 is available in a small 16-pin narrow SSOP package.

Applications

  • Distributed Power Systems
  • Embedded Computing
  • Communications Infrastructure
Part Models 4
1ku List Price Starting From $2.09

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3878EGN#PBF
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LTC3878EGN#TRPBF
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LTC3878IGN#PBF
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  • HTML
LTC3878IGN#TRPBF
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Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC3878EGN#PBF

PRODUCTION

LTC3878EGN#TRPBF

PRODUCTION

LTC3878IGN#PBF

PRODUCTION

LTC3878IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC3878EGN#PBF

PRODUCTION

LTC3878EGN#TRPBF

PRODUCTION

LTC3878IGN#PBF

PRODUCTION

LTC3878IGN#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

arrow down

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC3878EGN#PBF

PRODUCTION

LTC3878EGN#TRPBF

PRODUCTION

LTC3878IGN#PBF

PRODUCTION

LTC3878IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

arrow down

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC3878EGN#PBF

PRODUCTION

LTC3878EGN#TRPBF

PRODUCTION

LTC3878IGN#PBF

PRODUCTION

LTC3878IGN#TRPBF

PRODUCTION

Software and Part Ecosystem

Software and Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1292A

LTC3878EGN Demo Board | No Rsense, 4.5V ≤ VIN ≤ 14V, VOUT = 1.2V @ 18A

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DC1292A

LTC3878EGN Demo Board | No Rsense, 4.5V ≤ VIN ≤ 14V, VOUT = 1.2V @ 18A

LTC3878EGN Demo Board | No Rsense, 4.5V ≤ VIN ≤ 14V, VOUT = 1.2V @ 18A

Product Detail

Demonstration circuit 1292 is a NO RSENSE synchronous step-down DC/DC controller featuring the LTC3878EGN. Its output supplies 1.2V @ 18A and its input voltage range is 4.5V to 14V.



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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