LT1776 - Wide Input Range, High Efficiency, Step-Down Switching Regulator
The LT1776 contains several features to enhance efficiency. The internal control circuitry is normally powered via the VCC pin, thereby minimizing power drawn directly from the VIN supply (see Applications Information). The action of the LT1776 switch circuitry is also load dependent. At medium to high loads, the output switch circuitry maintains fast rise time for good efficiency. At light loads, rise time is deliberately reduced to avoid pulse skipping behavior.
The available SO-8 package and 200kHz switching frequency allow for minimal PC board area requirements.
Features- Wide Input Range: 7.4V to 40V
- Tolerates Input Transients to 60V
- 700mA Peak Switch Rating
- Adaptive Switch Drive Maintains Efficiency at High Load Without Pulse Skipping at Light Load
- True Current Mode Control
- 200kHz Fixed Operating Frequency
- Synchronizable to 400kHz
- Low Supply Current in Shutdown: 30µA
- Available in 8-Pin SO and PDIP Packages
Typical Application
 | Applications- Automotive DC/DC Converters
- Cellular Phone Battery Charger Accessories
- IEEE 1394 Step-Down Converters
Packaging |
Order Information
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|
| LT1776CN8#PBF | N-8 | C | $3.05 | $2.50 |
| LT1776CS8#PBF | SO-8 | C | $3.15 | $2.60 |
| LT1776CS8#TRPBF | SO-8 | C | | $2.66 |
| LT1776IN8#PBF | N-8 | I | $3.55 | $2.85 |
| LT1776IS8#PBF | SO-8 | I | $3.60 | $3.00 |
| LT1776IS8#TRPBF | SO-8 | I | | $3.06 |
Demo Boards
| Part Number | Description | Price |
|---|
| DC204A-B | LT1776CS8 | High Voltage, High Eff., Step Down Switching Regulator, 7V to 60Vin, 3.3V and 5V @ 0.5A Out (thru-hole input cap) | $75.00 |
DatasheetDesign NoteReliability DataLT Journal | Related Product |
