LT1949 - LT1949是600kHz, 1A Switch PWM DC/DC Converter
LT1949是Linear公司的一款SEPIC 稳压器产品，LT1949是600kHz, 1A Switch PWM DC/DC Converter，本站介绍了LT1949的封装应用图解、特点和优点、功能等，并给出了与LT1949相关的凌力尔特元器件型号供参考。
LT1949 - 600kHz, 1A Switch PWM DC/DC Converter
LT1949 - 600kHz, 1A Switch PWM DC/DC Converter - Linear Technology（凌力尔特）
功能描述
The LT1949 is a fixed frequency step-up DC/DC converter with a 1A, 0.5 Ohms internal switch. Capable of generating 10V at 175mA from a 3.3V input, the LT1949 is ideal for generating bias voltages for large screen LCD panels. Constant frequency 600kHz operation results in a low noise output that is easy to filter and the 30V switch rating allows output voltage up to 28V using a single inductor. An external compensation pin gives the user flexibility in optimizing loop compensation, allowing small low ESR ceramic capacitors to be used at the output. The 8-lead MSOP and SO packages ensure a low profile overall solution.
The LT1949 includes a low-battery detector that stays alive when the device goes into shutdown. Quiescent current in shutdown is 25μA, while operating current is 4.5mA.
特点
1.1A, 0.5 Ohms, 30V Internal Switch Operates with VIN as Low as 1.5V 600kHz Fixed Frequency Operation Low-Battery Detector Active in Shutdown Low VCESAT Switch: 410mV at 800mA Pin-for-Pin Compatible with the LT1317B Small 8-Lead MSOP Package and SO Packages应用
LCD Bias Supplies GPS Receivers Battery Backup Portable Electronic Equipment Diagnostic Medical Instrumentation以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) |
| LT1949EMS8 | MS-8 | E | $2.66 | $2.25 |
| LT1949EMS8#PBF | MS-8 | E | $2.66 | $2.25 |
| LT1949EMS8#TR | MS-8 | E | | $2.31 |
| LT1949EMS8#TRPBF | MS-8 | E | | $2.31 |
| LT1949ES8 | SO-8 | E | $2.60 | $2.20 |
| LT1949ES8#PBF | SO-8 | E | $2.60 | $2.20 |
| LT1949ES8#TR | SO-8 | E | | $2.26 |
| LT1949ES8#TRPBF | SO-8 | E | | $2.26 |
| LT1949IS8 | SO-8 | I | $2.95 | $2.50 |
| LT1949IS8#PBF | SO-8 | I | $2.95 | $2.50 |
| LT1949IS8#TR | SO-8 | I | | $2.56 |
| LT1949IS8#TRPBF | SO-8 | I | | $2.56 |
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