LTC1751 - LTC1751是Micropower, Regulated Charge Pump DC/DC Converters
LTC1751是Linear公司的一款稳压的升压型充电泵产品，LTC1751是Micropower, Regulated Charge Pump DC/DC Converters，本站介绍了LTC1751的封装应用图解、特点和优点、功能等，并给出了与LTC1751相关的凌力尔特元器件型号供参考。
LTC1751 - Micropower, Regulated Charge Pump DC/DC Converters
LTC1751 - Micropower, Regulated Charge Pump DC/DC Converters - Linear Technology（凌力尔特）
功能描述
The LTC1751 family are micropower charge pump DC/DC converters that produce a regulated output voltage at up to 100mA. The input voltage range is 2V to 5.5V. Extremely low operating current (20µA typical with no load) and low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) make them ideally suited for small, battery-powered applications.
The LTC1751 family operate as Burst Mode™ switched capacitor voltage doublers to achieve ultralow quiescent current. They have thermal shutdown capability and can survive a continuous short circuit from Vout to GND. The PGOOD pin on the LTC1751-3.3 and LTC1751-5 indicates when the output voltage has reached its final value and if the output has an undervoltage fault condition. The FB pin of the adjustable LTC1751 can be used to program the desired output voltage or current. An optional soft-start capacitor may be used at the SS pin to prevent excessive inrush current during start-up.
The LTC1751 family is available in an 8-pin MSOP package.
特点
5V Output Current:100mA (VIN >/= 3V) 3.3V Output Current:80mA (VIN >/= 2.5V) Ultralow Power: 20µA Quiescent Current Regulated Output Voltage: 3.3V ±4%, 5V ±4%, ADJ VIN Range: 2V to 5.5V 800kHz Switching Frequency No Inductors Very Low Shutdown Current: <2µA Shutdown Disconnects Load from VIN PowerGood/Undervoltage Output Adjustable Soft-Start Time Short-Circuit/Thermal Protection Available in 8-Pin MSOP应用
Li-Ion Battery Backup Supplies Local 3V and 5V Conversion Smart Card Readers PCMCIA Local 5V Supplies White LED Backlighting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) |
| LTC1751EMS8 | MS-8 | E | $2.67 | $2.25 |
| LTC1751EMS8-3.3 | MS-8 | E | $2.67 | $2.25 |
| LTC1751EMS8-3.3#PBF | MS-8 | E | $2.67 | $2.25 |
| LTC1751EMS8-3.3#TR | MS-8 | E | | $2.31 |
| LTC1751EMS8-3.3#TRPBF | MS-8 | E | | $2.31 |
| LTC1751EMS8-5 | MS-8 | E | $2.67 | $2.25 |
| LTC1751EMS8-5#PBF | MS-8 | E | $2.67 | $2.25 |
| LTC1751EMS8-5#TR | MS-8 | E | | $2.31 |
| LTC1751EMS8-5#TRPBF | MS-8 | E | | $2.31 |
| LTC1751EMS8#PBF | MS-8 | E | $2.67 | $2.25 |
| LTC1751EMS8#TR | MS-8 | E | | $2.31 |
| LTC1751EMS8#TRPBF | MS-8 | E | | $2.31 |
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