LTC1149 - High Efficiency Synchronous Step-Down Switching Regulators
Datasheet 
DocumentationDatasheet
Application Note
- AN51 - Power Conditioning for Notebook and Palmtop Systems
- AN54 - Power Conversion from Milliamps to Amps at Ultra-High Efficiency (Up to 95%)
- AN66 - Linear Technology Magazine Circuit Collection, Volume II
Design Note
- DN68 - New Synchronous Stepdown Switching Regulators Achieve 95% Efficiency
- DN72 - Single LTC1149 Delivers 3.3V and 5V at 17W
- DN77 - Single LTC1149 Provides 3.3V and 5V Surface Mount
Reliability Data
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Features
Typical Application
Description
N-16,SO-16
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1149CN#PBF | PDIP | 16 | C | $6.40 | $5.25 |
| LTC1149CN-3.3#PBF | PDIP | 16 | C | $6.40 | $5.25 |
| LTC1149CN-5#PBF | PDIP | 16 | C | $6.40 | $5.25 |
| LTC1149CS#PBF | SO | 16 | C | $5.33 | $4.65 |
| LTC1149CS#TRPBF | SO | 16 | C | $4.71 | |
| LTC1149CS-3.3#PBF | SO | 16 | C | $5.33 | $4.65 |
| LTC1149CS-3.3#TRPBF | SO | 16 | C | $4.71 | |
| LTC1149CS-5#PBF | SO | 16 | C | $5.33 | $4.65 |
| LTC1149CS-5#TRPBF | SO | 16 | C | $4.71 | |
| LTC1149CN | PDIP | 16 | C | $12.80 | $10.50 |
| LTC1149CN-3.3 | PDIP | 16 | C | $12.80 | $10.50 |
| LTC1149CN-5 | PDIP | 16 | C | $12.80 | $10.50 |
| LTC1149CS | SO | 16 | C | $10.66 | $9.30 |
| LTC1149CS#TR | SO | 16 | C | $9.42 | |
| LTC1149CS-3.3 | SO | 16 | C | $10.66 | $9.30 |
| LTC1149CS-3.3#TR | SO | 16 | C | $9.42 | |
| LTC1149CS-5 | SO | 16 | C | $10.66 | $9.30 |
| LTC1149CS-5#TR | SO | 16 | C | $9.42 |
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 |
|---|---|---|---|
| DC024A-A | LTC1149CS | HIGH EFFICIENCY BUCK 5V/2A OUT (ADJUSTABLE) | $100.00 |