| Part No.： | LT1111 |
| Page： | 16 Pages |
| Size： | 232 KB |
| Manufacturer： | Linear Technology |
| Logo： |  |
| Views： | 1 |
| Update Time： | 2025-01-02 11:52:58 |
| DataSheet： | Download |
| Part No. | Packing | SPQ | Marking | MSL | Pins | Temp Range | Package Description | Buy |
| LT1111CN8#PBF | Tube | 50 | LT1111CN8 | 1 | 8 | 0°C ~ 70°C | 8-Lead PDIP | |
| LT1111CN8-5#PBF | Tube | 50 | LT1111CN8-5 | 1 | 8 | 0°C ~ 70°C | 8-Lead PDIP | |
| LT1111CN8-12#PBF | Tube | 50 | LT1111CN8-12 | 1 | 8 | 0°C ~ 70°C | 8-Lead PDIP | |
| LT1111CS8#PBF | Tube | 100 | 1111 | 1 | 8 | 0°C ~ 70°C | 8-Lead SOIC | |
| LT1111CS8#TRPBF | Reel | 2500 | 1111 | 1 | 8 | 0°C ~ 70°C | 8-Lead SOIC | |
| LT1111CS8-5#PBF | Tube | 100 | 11115 | 1 | 8 | 0°C ~ 70°C | 8-Lead SOIC | |
| LT1111CS8-5#TRPBF | Reel | 2500 | 11115 | 1 | 8 | 0°C ~ 70°C | 8-Lead SOIC | |
| LT1111CS8-12#PBF | Tube | 100 | 11111 | 1 | 8 | 0°C ~ 70°C | 8-Lead SOIC | |
| LT1111CS8-12#TRPBF | Reel | 2500 | 11111 | 1 | 8 | 0°C ~ 70°C | 8-Lead SOIC | |
| LT1111IS8#PBF | Tube | 100 | 1111I | 1 | 8 | -40°C ~ 125°C | 8-Lead SOIC | |
| LT1111IS8#TRPBF | Reel | 2500 | 1111I | 1 | 8 | -40°C ~ 125°C | 8-Lead SOIC | |
| LT1111MJ8 | Tube | 1 | 8 | -40°C ~ 125°C | 8-LEAD CERAMIC DIP | |||
| LT1111MJ8-5 | Tube | 1 | 8 | -40°C ~ 125°C | 8-LEAD CERAMIC DIP | |||
| LT1111MJ8-12 | Tube | 1 | 8 | -40°C ~ 125°C | 8-LEAD CERAMIC DIP |
The LT1111 is a versatile micropower DC/DC converter. The device requires only three external components to deliver a fixed output of 5V or 12V. Supply voltage ranges from 2V to 12V in step-up mode and to 30V in step-down mode. The LT1111 functions equally well in step-up, step-down, or inverting applications.
The LT1111 oscillator is set at 72kHz, optimizing the device to work with off-the-shelf surface mount inductors. The device can deliver 5V at 100mA from a 3V input in step-up mode or 5V at 200mA from a 12V input in step-down mode.
Switch current limit can be programmed with a single resistor. An auxiliary open-collector gain block can be configured as a low-battery detector, linear post regulator, undervoltage lock-out circuit, or error amplifier.
For input sources of less than 2V use the LT1110.
