LTC3872 - No RSENSE Current Mode Boost DC/DC Controller
Datasheet Documentation
Datasheet
Reliability Data
LT Journal
Press Release
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Overview

Features

Typical Application

LTC3872 Typical Application
LTC3872 Typical Application

Description

The LTC®3872 is a constant frequency current mode boost DC/DC controller that drives an N-channel power MOSFET and requires very few external components. The No RSENSETM architecture eliminates the need for a sense resistor, improves efficiency and saves board space.

The LTC3872 provides excellent AC and DC load and line regulation with ±1.5% output voltage accuracy. It incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2.3V.

High switching frequency of 550kHz allows the use of a small inductor. The LTC3872 is available in an 8-lead low profile (1mm) ThinSOTTM package and 8-pin 2mm × 3mm DFN package.

 LTC3872LTC3872-1
Frequency Foldback In Current Limit Yes No
Packaging

3x2 DFN-8,SOT-23

LTC3872 Package Drawing
LTC3872 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LTC3872EDDB#PBF DFN 8 E $2.57
LTC3872EDDB#TRMPBF DFN 8 E $2.57 $1.85
LTC3872EDDB#TRPBF DFN 8 E $2.57 $1.80
LTC3872EDDB-1#PBF DFN 8 E $2.57
LTC3872EDDB-1#TRMPBF DFN 8 E $2.57 $1.85
LTC3872EDDB-1#TRPBF DFN 8 E $2.57 $1.80
LTC3872ETS8#PBF SOT 8 E $2.57
LTC3872ETS8#TRMPBF SOT 8 E $2.57 $1.85
LTC3872ETS8#TRPBF SOT 8 E $2.57 $1.80
LTC3872ETS8-1#PBF SOT 8 E $2.57
LTC3872ETS8-1#TRMPBF SOT 8 E $2.57 $1.85
LTC3872ETS8-1#TRPBF SOT 8 E $2.57 $1.80
LTC3872HDDB#PBF DFN 8 H $3.36
LTC3872HDDB#TRMPBF DFN 8 H $3.36 $2.40
LTC3872HDDB#TRPBF DFN 8 H $3.36 $2.35
LTC3872HDDB-1#PBF DFN 8 H $3.36
LTC3872HDDB-1#TRMPBF DFN 8 H $3.36 $2.40
LTC3872HDDB-1#TRPBF DFN 8 H $3.36 $2.35
LTC3872HTS8#PBF SOT 8 H $3.36
LTC3872HTS8#TRMPBF SOT 8 H $3.36 $2.40
LTC3872HTS8#TRPBF SOT 8 H $3.36 $2.35
LTC3872HTS8-1#PBF SOT 8 H $3.36
LTC3872HTS8-1#TRMPBF SOT 8 H $3.36 $2.40
LTC3872HTS8-1#TRPBF SOT 8 H $3.36 $2.35
LTC3872IDDB#PBF DFN 8 I $2.96
LTC3872IDDB#TRMPBF DFN 8 I $2.96 $2.12
LTC3872IDDB#TRPBF DFN 8 I $2.96 $2.07
LTC3872IDDB-1#PBF DFN 8 I $2.96
LTC3872IDDB-1#TRMPBF DFN 8 I $2.96 $2.12
LTC3872IDDB-1#TRPBF DFN 8 I $2.96 $2.07
LTC3872ITS8#PBF SOT 8 I $2.96
LTC3872ITS8#TRMPBF SOT 8 I $2.96 $2.12
LTC3872ITS8#TRPBF SOT 8 I $2.96 $2.07
LTC3872ITS8-1#PBF SOT 8 I $2.96
LTC3872ITS8-1#TRMPBF SOT 8 I $2.96 $2.12
LTC3872ITS8-1#TRPBF SOT 8 I $2.96 $2.07
LTC3872ETS8#TRM SOT 8 E $5.14 $3.70
LTC3872ETS8#TR SOT 8 E $5.14 $3.60
LTC3872ETS8 SOT 8 E $5.14
LTC3872ETS8-1 SOT 8 E $5.14
LTC3872ETS8-1#TR SOT 8 E $5.14 $3.60
LTC3872ETS8-1#TRM SOT 8 E $5.14 $3.70
LTC3872ITS8 SOT 8 I $5.92
LTC3872ITS8-1 SOT 8 I $5.92
LTC3872ITS8-1#TR SOT 8 I $5.92 $4.14
LTC3872HTS8 SOT 8 H $6.72
LTC3872HTS8-1 SOT 8 H $6.72
LTC3872HTS8-1#TR SOT 8 H $6.72 $4.70
LTC3872EDDB-1 DFN 8 E $5.14
LTC3872EDDB-1#TR DFN 8 E $5.14 $3.60
LTC3872IDDB DFN 8 I $5.92
LTC3872IDDB-1 DFN 8 I $5.92
LTC3872IDDB-1#TR DFN 8 I $5.92 $4.14
LTC3872HDDB DFN 8 H $6.72
LTC3872HDDB-1 DFN 8 H $6.72
LTC3872HDDB-1#TR DFN 8 H $6.72 $4.70
LTC3872EDDB DFN 8 E $5.14
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


Part Number Description Price Documentation
DC989B-A LTC3872ETS8 Demo Board | 2.75V ≤ VIN ≤ 4.5V; VOUT: 5V @ 2A $75.00