LTC3878

PRODUCTION

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

Part Models: 4
1ku List Price: Starting From $2.09

Viewing:

Overview

Wide V_IN Range: 4V to 38V
±1% 0.8V Voltage Reference
Extremely Fast Transient Response
t_ON(MIN): 43ns
No R_SENSE^™ Valley Current Mode Control
Stable with Low ESR Ceramic C_OUT
Supports Smooth Start-Up Into Pre-Biased Output
Optimized for High Step-Down Ratios
Pin Compatible with the LTC1778 (No EXTV_CC 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

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 EXTV_CC while offering better efficiency. Consult with the factory to verify compatibility.

Operating frequency is set by an external resistor and compensated for variations in V_IN 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% V_IN 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

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
LTC3878EGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3878EGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3878IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC3878IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC3878EGN#PBF	PRODUCTION
LTC3878EGN#TRPBF	PRODUCTION
LTC3878IGN#PBF	PRODUCTION
LTC3878IGN#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
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]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC3878EGN#PBF	PRODUCTION
LTC3878EGN#TRPBF	PRODUCTION
LTC3878IGN#PBF	PRODUCTION
LTC3878IGN#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Power System Management (PSM) & Sequencers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Protection Switches & Controllers 1
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode

Tools & Simulations

LTspice 1

LTC3878 Demo Circuit - No Rsense Step-Down Controller (4.5-14V to 1.2V@18A)

Models for the following parts are available in LTspice:

LTC3878

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.

Evaluation Kits

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

Buy Now View Details

Product Details

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.

Resources

DC1292A - Design File
9/24/2009

DC1292A - Schematic
9/24/2009

DC1292A - Demo Manual
9/24/2009

Latest Discussions

1 Years Ago

2 Years Ago

LTC3878

Overview

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 2

Product Selector Card 1