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
AEC-Q100 data available for specific packages
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 |
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
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 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports 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 Now • Request Samples | ||||||
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
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
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Models for the following parts are available in LTspice:
LT1934
LT1934-1
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
