LT1934 - Micropower Step-Down Switching Regulators in ThinSOT

Features

  • Wide Input Voltage Range: 3.2V to 34V
  • Micropower Operation: IQ = 12µA
  • 5V at 250mA from 6.5V to 34V Input (LT1934)
  • 5V at 60mA from 6.5V to 34V Input (LT1934-1)
  • 3.3V at 250mA from 4.5V to 34V Input (LT1934)
  • 3.3V at 60mA from 4.5V to 34V Input (LT1934-1)
  • Low Shutdown Current: <1µA
  • Low VCESAT Switch: 200mV at 300mA
  • Low Profile (1mm) SOT-23 (ThinSOT™) and (2mm × 3mm × 0.8mm) 6-Pin DFN Package
Designed for Automotive and Transportation Applications
AEC-Q100 generic family data available for specific packages


Typical Application

LT1934 Typical Application
LT1934 Typical Application

Description

The LT1934 is a micropower step-down DC/DC converter with internal 400mA power switch, packaged in a low profile (1mm) ThinSOT. With its wide input range of 3.2V to 34V, the LT1934 can regulate a wide variety of power sources, from 4-cell alkaline batteries and 5V logic rails to unregulated wall transformers and lead-acid batteries. Quiescent current is just 12µA and a zero current shutdown mode disconnects the load from the input source, simplifying power management in battery-powered systems. Burst Mode operation and the low drop internal power switch result in high efficiency over a broad range of load current.

The LT1934 provides up to 300mA of output current. The LT1934-1 has a lower current limit, allowing optimum choice of external components when the required output current is less than 60mA. Fast current limiting protects the LT1934 and external components against shorted outputs, even at 34V input.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT1934EDCB-1#PBF 2x3 DFN-6 DCB E 05-08-1715 Yes
LT1934EDCB-1#TRMPBF 2x3 DFN-6 DCB E 05-08-1715 Yes
LT1934EDCB-1#TRPBF 2x3 DFN-6 DCB E 05-08-1715 Yes
LT1934EDCB#PBF 2x3 DFN-6 DCB E 05-08-1715 Yes
LT1934EDCB#TRMPBF 2x3 DFN-6 DCB E 05-08-1715 Yes
LT1934EDCB#TRPBF 2x3 DFN-6 DCB E 05-08-1715 Yes
LT1934ES6-1#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LT1934ES6-1#TRPBF SOT-23 S6 E 05-08-1636 Yes
LT1934ES6#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LT1934ES6#TRPBF SOT-23 S6 E 05-08-1636 Yes
LT1934IDCB-1#PBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LT1934IDCB-1#TRMPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LT1934IDCB-1#TRPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LT1934IDCB#PBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LT1934IDCB#TRMPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LT1934IDCB#TRPBF 2x3 DFN-6 DCB I 05-08-1715 Yes
LT1934IS6-1#PBF SOT-23 S6 I 05-08-1636 Yes
LT1934IS6-1#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LT1934IS6-1#TRPBF SOT-23 S6 I 05-08-1636 Yes
LT1934IS6#PBF SOT-23 S6 I 05-08-1636 Yes
LT1934IS6#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LT1934IS6#TRPBF SOT-23 S6 I 05-08-1636 Yes


LT1934 Package Drawing
LT1934 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT1934EDCB-1#PBF 2x3 DFN-6 E $3.23 Yes
LT1934EDCB-1#TRMPBF 2x3 DFN-6 E $3.23 $2.31 Yes
LT1934EDCB-1#TRPBF 2x3 DFN-6 E $3.23 $2.26 Yes
LT1934EDCB#PBF 2x3 DFN-6 E $2.68 Yes
LT1934EDCB#TRMPBF 2x3 DFN-6 E $2.68 $2.28 Yes
LT1934EDCB#TRPBF 2x3 DFN-6 E $2.68 $2.26 Yes
LT1934ES6-1#TRMPBF SOT-23 E $2.68 $2.28 Yes
LT1934ES6-1#TRPBF SOT-23 E $2.68 $2.26 Yes
LT1934ES6#TRMPBF SOT-23 E $2.68 $2.28 Yes
LT1934ES6#TRPBF SOT-23 E $2.68 $2.26 Yes
LT1934IDCB-1#PBF 2x3 DFN-6 I $3.70 Yes
LT1934IDCB-1#TRMPBF 2x3 DFN-6 I $3.70 $2.64 Yes
LT1934IDCB-1#TRPBF 2x3 DFN-6 I $3.70 $2.59 Yes
LT1934IDCB#PBF 2x3 DFN-6 I $3.07 Yes
LT1934IDCB#TRMPBF 2x3 DFN-6 I $3.07 $2.61 Yes
LT1934IDCB#TRPBF 2x3 DFN-6 I $3.07 $2.59 Yes
LT1934IS6-1#PBF SOT-23 I $3.07 Yes
LT1934IS6-1#TRMPBF SOT-23 I $3.07 $2.61 Yes
LT1934IS6-1#TRPBF SOT-23 I $3.07 $2.59 Yes
LT1934IS6#PBF SOT-23 I $3.07 Yes
LT1934IS6#TRMPBF SOT-23 I $3.07 $2.61 Yes
LT1934IS6#TRPBF SOT-23 I $3.07 $2.59 Yes
Buy NowRequest Samples
* 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
DC544A LT1934ES6/LT1934ES6-1 Demo Board | 2 Circuits, 4.5V ≤ VIN ≤ 34V, Vout = 3.3V/5V @ 250mA (LT1934) and 50mA (LT1934-1) $125.00
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Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

Please contact your local sales representative for more information regarding reliability reports and AEC-Q100 data or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT1934IDCB-1#PBF 2x3 DFN-6 I $3.70 Yes
LT1934IDCB-1#TRMPBF 2x3 DFN-6 I $3.70 $2.64 Yes
LT1934IDCB-1#TRPBF 2x3 DFN-6 I $3.70 $2.59 Yes
LT1934IDCB#PBF 2x3 DFN-6 I $3.07 Yes
LT1934IDCB#TRMPBF 2x3 DFN-6 I $3.07 $2.61 Yes
LT1934IDCB#TRPBF 2x3 DFN-6 I $3.07 $2.59 Yes
LT1934IS6-1#PBF SOT-23 I $3.07 Yes
LT1934IS6-1#TRMPBF SOT-23 I $3.07 $2.61 Yes
LT1934IS6-1#TRPBF SOT-23 I $3.07 $2.59 Yes
LT1934IS6#PBF SOT-23 I $3.07 Yes
LT1934IS6#TRMPBF SOT-23 I $3.07 $2.61 Yes
LT1934IS6#TRPBF SOT-23 I $3.07 $2.59 Yes
Buy NowRequest Samples
* 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.

Applications

  • Wall Transformer Regulation
  • Automotive Battery Regulation
  • Standby Power for Portable Products
  • Distributed Supply Regulation
  • Industrial Control Supplies

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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LT1934
LT1934-1

Technical Support