LT3970 Series - 40V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes
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Datasheet
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Overview

Features

Typical Application

LT3970 Typical Application
LT3970 Typical Application

Description

The LT®3970 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 40V, and consumes only 2.5μA of quiescent current. A high efficiency switch is included on the die along with the catch diode, boost diode, and the necessary oscillator, control and logic circuitry. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 5mV in a typical application. Current mode topology is used for fast transient response and good loop stability. A catch diode current limit provides protection against shorted outputs and overvoltage conditions. An enable pin with accurate threshold is available, producing a low shutdown current of 0.7μA. A power good flag signals when VOUT reaches 90% of the programmed output voltage. The LT3970 is available in small 10-pin MSOP and 3mm × 2mm DFN packages.

Packaging

3x2 DFN-10,MS-10

LT3970 Package Drawing
LT3970 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LT3970EDDB#PBF DFN 10 E $3.36
LT3970EDDB#TRMPBF DFN 10 E $3.36 $2.40
LT3970EDDB#TRPBF DFN 10 E $3.36 $2.35
LT3970EDDB-3.3#PBF DFN 10 E $3.36
LT3970EDDB-3.3#TRMPBF DFN 10 E $3.36 $2.40
LT3970EDDB-3.3#TRPBF DFN 10 E $3.36 $2.35
LT3970EDDB-3.42#PBF DFN 10 E $3.36
LT3970EDDB-3.42#TRMPBF DFN 10 E $3.36 $2.40
LT3970EDDB-3.42#TRPBF DFN 10 E $3.36 $2.35
LT3970EDDB-5#PBF DFN 10 E $3.36
LT3970EDDB-5#TRMPBF DFN 10 E $3.36 $2.40
LT3970EDDB-5#TRPBF DFN 10 E $3.36 $2.35
LT3970EMS#PBF MSOP 10 E $3.43 $2.40
LT3970EMS#TRPBF MSOP 10 E $3.78 $2.46
LT3970EMS-3.3#PBF MSOP 10 E $3.43 $2.40
LT3970EMS-3.3#TRPBF MSOP 10 E $2.46
LT3970EMS-5#PBF MSOP 10 E $3.43 $2.40
LT3970EMS-5#TRPBF MSOP 10 E $2.46
LT3970HMS#PBF MSOP 10 H $4.17 $2.92
LT3970HMS#TRPBF MSOP 10 H $2.98
LT3970HMS-3.3#PBF MSOP 10 H $4.17 $2.92
LT3970HMS-3.3#TRPBF MSOP 10 H $2.98
LT3970HMS-5#PBF MSOP 10 H $4.17 $2.92
LT3970HMS-5#TRPBF MSOP 10 H $2.98
LT3970IDDB#PBF DFN 10 I $3.73
LT3970IDDB#TRMPBF DFN 10 I $3.73 $2.66
LT3970IDDB#TRPBF DFN 10 I $3.73 $2.61
LT3970IDDB-3.3#PBF DFN 10 I $3.73
LT3970IDDB-3.3#TRMPBF DFN 10 I $3.73 $2.66
LT3970IDDB-3.3#TRPBF DFN 10 I $3.73 $2.61
LT3970IDDB-5#PBF DFN 10 I $3.73
LT3970IDDB-5#TRMPBF DFN 10 I $3.73 $2.66
LT3970IDDB-5#TRPBF DFN 10 I $3.73 $2.61
LT3970IMS#PBF MSOP 10 I $3.82 $2.67
LT3970IMS#TRPBF MSOP 10 I $4.22 $2.73
LT3970IMS-3.3#PBF MSOP 10 I $3.82 $2.67
LT3970IMS-3.3#TRPBF MSOP 10 I $2.73
LT3970IMS-5#PBF MSOP 10 I $3.82 $2.67
LT3970IMS-5#TRPBF MSOP 10 I $2.73
* 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
DC1566A LT3970EMS Demo Board | 40V, 350mA Step-Down Regulator with 2uA Quiescent Current and Integrated Diodes $75.00