DocumentationDatasheet
Application Note
- AN23 - Micropower Circuits for Signal Conditioning
- AN29 - Some Thoughts on DC-DC Converters
- AN30 - Switching Regulator Circuit Collection
- AN70 - A Monolithic Switching Regulator with 100µV Output Noise
- AN90 - Current Sources for Fiber Optic Lasers: A Compendium of Pleasant Current Events
Reliability Data
LT Journal
cad_symbol
ltspice
Features
- Output Current: 100mA (LT1054)
125mA (LT1054L) - Reference and Error Amplifier for Regulation
- Low Loss: 1.1V at 100mA
- Operating Range:
3.5V to 15V (LT1054)
3.5V to 7V (LT1054L) - External Shutdown
- External Oscillator Synchronization
- Can Be Paralleled
- Pin Compatible with the LTC®1044/ICL7660
- Available in SW16 and SO-8 Packages
Typical Application
Description
The LT®1054 is a monolithic, bipolar, switched-capacitor voltage converter and regulator. The LT1054 provides higher output current than previously available converters with significantly lower voltage losses. An adaptive switch driver scheme optimizes efficiency over a wide range of output currents. Total voltage loss at 100mA output current is typically 1.1V. This holds true over the full supply voltage range of 3.5V to 15V. Quiescent current is typically 2.5mA.
The LT1054 also provides regulation, a feature not previously available in switched-capacitor voltage converters. By adding an external resistive divider a regulated output can be obtained. This output will be regulated against changes in both input voltage and output current. The LT1054 can also be shut down by grounding the feedback pin. Supply current in shutdown is less than 100μA.
The internal oscillator of the LT1054 runs at a nominal frequency of 25kHz. The oscillator pin can be used to adjust the switching frequency or to externally synchronize the LT1054.
The LT1054 is pin compatible with previous converters such the LTC1044/LTC7660.
N-8,SO-8,SW-16,CERDIP-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT1054CN8#PBF | PDIP | 8 | C | $3.25 | $2.65 |
| LT1054CS8#PBF | SO | 8 | C | $3.40 | $2.80 |
| LT1054CS8#TRPBF | SO | 8 | C | $2.86 | |
| LT1054CSW#PBF | SO | 16 | C | $4.00 | $3.15 |
| LT1054CSW#TRPBF | SO | 16 | C | $3.21 | |
| LT1054IN8#PBF | PDIP | 8 | I | $4.75 | $3.85 |
| LT1054IS8#PBF | SO | 8 | I | $5.75 | $4.50 |
| LT1054IS8#TRPBF | SO | 8 | I | $4.56 | |
| LT1054ISW#PBF | SO | 16 | I | $5.75 | $4.65 |
| LT1054ISW#TRPBF | SO | 16 | I | $4.71 | |
| LT1054LCS8#PBF | SO | 8 | C | $2.30 | $2.00 |
| LT1054LCS8#TRPBF | SO | 8 | C | $2.06 | |
| LT1054CN8 | PDIP | 8 | C | $6.50 | $5.30 |
| LT1054CS8 | SO | 8 | C | $6.80 | $5.60 |
| LT1054CS8#TR | SO | 8 | C | $5.72 | |
| LT1054CSW | SO | 16 | C | $8.00 | $6.30 |
| LT1054CSW#TR | SO | 16 | C | $6.42 | |
| LT1054IN8 | PDIP | 8 | I | $9.50 | $7.70 |
| LT1054IS8 | SO | 8 | I | $11.50 | $9.00 |
| LT1054IS8#TR | SO | 8 | I | $9.12 | |
| LT1054ISW | SO | 16 | I | $11.50 | $9.30 |
| LT1054ISW#TR | SO | 16 | I | $9.42 | |
| LT1054LCS8 | SO | 8 | C | $4.60 | $4.00 |
| LT1054LCS8#TR | SO | 8 | C | $4.12 |
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.