LTC3103 - 1.8μA Quiescent Current, 15V, 300mA Synchronous Step-Down DC/DC Converter
Features
- Ultralow Quiescent Current: 1.8μA
- Synchronous Rectification: Efficiency Up to 95%
- Wide VIN Range: 2.5V to 15V
- Wide VOUT Range: 0.6V to 13.8V
- 300mA Output Current
- User-Selectable Automatic Burst Mode® or Forced Continuous Operation
- Accurate and Programmable RUN Pin Threshold
- 1.2MHz Fixed Frequency PWM
- Internal Compensation
- Power Good Status Output for VOUT
- Available in Thermally Enhanced 3mm × 3mm × 0.75mm, 10-Pin DFN and 10-Pin MSOP Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC®3103 is a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current.
The LTC3103 offers two operational modes: automatic Burst Mode operation and forced continuous mode allowing the user the ability to optimize output voltage ripple, noise and light load efficiency. With Burst Mode operation enabled, the typical DC input supply current at no load drops to 1.8μA maximizing the efficiency for light loads. Selection of forced continuous mode provides very low noise constant frequency, 1.2MHz operation.
Additionally, the LTC3103 includes an accurate RUN comparator, thermal overload protection, a power good output and an integrated soft-start feature to guarantee that the power system start-up is well controlled.
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 |
|---|---|---|---|---|---|
| LTC3103EDD#PBF | 3x3 DFN-10 | DD | E | 05-08-1699 | Yes |
| LTC3103EDD#TRPBF | 3x3 DFN-10 | DD | E | 05-08-1699 | Yes |
| LTC3103EMSE#PBF | MS-10E | MSE | E | 05-08-1664 | Yes |
| LTC3103EMSE#TRPBF | MS-10E | MSE | E | 05-08-1664 | Yes |
| LTC3103IDD#PBF | 3x3 DFN-10 | DD | I | 05-08-1699 | Yes |
| LTC3103IDD#TRPBF | 3x3 DFN-10 | DD | I | 05-08-1699 | Yes |
| LTC3103IMSE#PBF | MS-10E | MSE | I | 05-08-1664 | Yes |
| LTC3103IMSE#TRPBF | MS-10E | MSE | I | 05-08-1664 | 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
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC3103EDD#PBF | 3x3 DFN-10 | E | $3.50 | $2.45 | Yes | |
| LTC3103EDD#TRPBF | 3x3 DFN-10 | E | $2.51 | Yes | ||
| LTC3103EMSE#PBF | MS-10E | E | $3.50 | $2.45 | Yes | |
| LTC3103EMSE#TRPBF | MS-10E | E | $2.51 | Yes | ||
| LTC3103IDD#PBF | 3x3 DFN-10 | I | $3.86 | $2.70 | Yes | |
| LTC3103IDD#TRPBF | 3x3 DFN-10 | I | $2.76 | Yes | ||
| LTC3103IMSE#PBF | MS-10E | I | $3.86 | $2.70 | Yes | |
| LTC3103IMSE#TRPBF | MS-10E | I | $2.76 | Yes | ||
| Buy Now • Request Samples | ||||||
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 |
|---|---|---|---|
| DC1883A | LTC3103EDD Demo Board I 2.5 ≤ VIN ≤ 15V, VOUT = 1.8V @ 300mA | $100.00 | |
| 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 | |
|---|---|---|---|---|---|---|
| LTC3103IMSE#PBF | MS-10E | I | $3.86 | $2.70 | Yes | |
| LTC3103IMSE#TRPBF | MS-10E | I | $2.76 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Remote Sensor Networks
- Distributed Power Systems
- Multicell Battery or SuperCap Regulator
- Energy Harvesters
- Portable Instruments
- Low Power Wireless Systems
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Design Tools
LTspice
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LTC3103
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.
