LT1303 - Micropower High Efficiency DC/DC Converters with Low-Battery Detector Adjustable and Fixed 5V
Features
- 5V at 200mA from a 2V Input
- Supply Voltage As Low As 1.8V
- Up to 88% Efficiency
- 120µA Quiescent Current
- Low-Battery Detector
- Low VCESAT Switch: 170mV at 1A Typ
- Uses Inexpensive Surface Mount Inductors
- 8-Lead PDIP or SO Package
Typical Application
Description
The LT1303/LT1303-5 are micropower step-up high efficiency DC/DC converters using Burst Mode operation. They are ideal for use in small, low-voltage battery-operated systems. The LT1303-5 accepts an input voltage between 1.8V and 5V and convertsit to a regulated 5V. The LT1303 is an adjustable version that can supply an output voltage up to 25V. Quiescent current is only 120µA from the battery and the shutdown pin further reduces current to 10µA. The low-battery detector provides an open-collector output that goes low when the input voltage drops below a preset level. The on-chip NPN power switch has a low 170mV saturation voltage at a switch current of 1A. The LT1303/1303-5 are available in 8-lead PDIP or SO packages, easing board space requirements. For higher output current, please see the LT1305 or LT1302.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 |
|---|---|---|---|---|---|
| LT1303CN8-5#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LT1303CN8#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LT1303CS8-5#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1303CS8-5#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1303CS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1303CS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LT1303IN8-5#PBF | N-8 | N | I | 05-08-1510 (N8) | Yes |
| LT1303IS8-5#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1303IS8-5#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1303IS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LT1303IS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | 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 | |
|---|---|---|---|---|---|---|
| LT1303CN8-5#PBF | N-8 | C | $3.15 | $2.45 | Yes | |
| LT1303CN8#PBF | N-8 | C | $3.15 | $2.45 | Yes | |
| LT1303CS8-5#PBF | SO-8 | C | $3.15 | $2.45 | Yes | |
| LT1303CS8-5#TRPBF | SO-8 | C | $2.51 | Yes | ||
| LT1303CS8#PBF | SO-8 | C | $3.15 | $2.45 | Yes | |
| LT1303CS8#TRPBF | SO-8 | C | $2.51 | Yes | ||
| LT1303IN8-5#PBF | N-8 | I | $4.10 | $3.25 | Yes | |
| LT1303IS8-5#PBF | SO-8 | I | $4.25 | $3.35 | Yes | |
| LT1303IS8-5#TRPBF | SO-8 | I | $3.41 | Yes | ||
| LT1303IS8#PBF | SO-8 | I | $4.25 | $3.35 | Yes | |
| LT1303IS8#TRPBF | SO-8 | I | $3.41 | 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.Click here to view our complete list of demo boards
Applications
- EL Panel Drivers
- 2-Cell and 3-Cell to 5V Conversion
- Palmtop Computers
- Portable Instruments
- Bar-Code Scanners
- Wireless Systems
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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
Models for the following parts are available in LTspice:
LT1303
LT1303-5
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.
