LTC1682 - Doubler Charge Pumps with Low Noise Linear Regulator
The LTC®1682/LTC1682-3.3/LTC1682-5 are doubler charge pumps with an internal low noise, low dropout (LDO) linear regulator. These parts are designed to provide a low noise boosted supply voltage for powering noise sensitive devices such as high frequency VCOs in wireless applications.
An internal doubler charge pump converts a 1.8V to 4.4V input to a boosted output, while the internal LDO regulator converts the boosted voltage to a low noise regulated output. The adjustable version allows the user to set Vout via external resistors connected to FB. The regulator is capable of supplying up to 50mA of output current. Shutdown reduces the supply current to <5µA, removes the load from VIN by disabling the regulator and discharges Vout to ground through a 100Ohms switch.
The LTC1682 LDO regulator is stable with only 2µF on the output. Small ceramic capacitors can be used, reducing PC board area.
The LTC1682/LTC1682-3.3/LTC1682-5 are short-circuit and over temperature protected. The parts are available in 8-pin MSOP and SO packages.
特点- Low Output Noise: 60µVRMS (100kHz BW)
- Adjustable or Fixed Boosted Output
- Adjustable Output Voltage Range: 2.5V to 5.5V
- Fixed Output Voltages: 3.3V, 5V
- Wide Input Voltage Range: 1.8V to 4.4V
- Uses Small Ceramic Capacitors
- No Inductors Required
- Output Current up to 50mA
- 550kHz Switching Frequency
- Low Operating Current: 150µA
- Low Shutdown Current: 1µA
- Internal Thermal Shutdown and Current Limiting
- Available in 8-Pin MSOP and SO Packages
典型应用
 | 应用- VCO Power Supplies in Cellular Phones
- 2-Way Pagers
- Wireless PCMCIA Cards
- Portable Medical Instruments
- Low Power Data Acquisition
- Remote Transmitters
封装信息
 |
Order Information 订购型号| 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) * |
|---|
| LTC1682CMS8-3.3#PBF | MS-8 | C | $2.30 | $1.90 |
| LTC1682CMS8-3.3#TRPBF | MS-8 | C | | $1.96 |
| LTC1682CMS8-5#PBF | MS-8 | C | $2.30 | $1.90 |
| LTC1682CMS8-5#TRPBF | MS-8 | C | | $1.96 |
| LTC1682CMS8#PBF | MS-8 | C | $2.30 | $1.90 |
| LTC1682CMS8#TRPBF | MS-8 | C | | $1.96 |
| LTC1682CS8-3.3#PBF | SO-8 | C | $2.00 | $1.70 |
| LTC1682CS8-3.3#TRPBF | SO-8 | C | | $1.76 |
| LTC1682CS8-5#PBF | SO-8 | C | $2.00 | $1.70 |
| LTC1682CS8-5#TRPBF | SO-8 | C | | $1.76 |
| LTC1682CS8#PBF | SO-8 | C | $2.00 | $1.70 |
| LTC1682CS8#TRPBF | SO-8 | C | | $1.76 |
| LTC1682IMS8-3.3#PBF | MS-8 | I | $2.65 | $2.25 |
| LTC1682IMS8-3.3#TRPBF | MS-8 | I | | $2.31 |
| LTC1682IMS8-5#PBF | MS-8 | I | $2.65 | $2.25 |
| LTC1682IMS8-5#TRPBF | MS-8 | I | | $2.31 |
| LTC1682IMS8#PBF | MS-8 | I | $2.65 | $2.25 |
| LTC1682IMS8#TRPBF | MS-8 | I | | $2.31 |
| LTC1682IS8-3.3#PBF | SO-8 | I | $2.35 | $2.00 |
| LTC1682IS8-3.3#TRPBF | SO-8 | I | | $2.06 |
| LTC1682IS8-5#PBF | SO-8 | I | $2.35 | $2.00 |
| LTC1682IS8-5#TRPBF | SO-8 | I | | $2.06 |
| LTC1682IS8#PBF | SO-8 | I | $2.35 | $2.00 |
| LTC1682IS8#TRPBF | SO-8 | I | | $2.06 |
演示电路板
| 器件型号 | 描述 | 价格 |
|---|
| DC249A-A | LTC1682CMS8 | Doubler Charge Pump with Linear Regulator, Adjustable, 1.8 to 4.4Vin, 2.5 to 5.5Vout @ 50mA | 联系凌力尔特 |
| DC249A-B | LTC1682CMS8-5 | Doubler Charge Pump with Linear Regulator, Fixed, 2.7 to 4.4Vin, 5.0Vout @ 50mA | 联系凌力尔特 |
| DC249A-C | LTC1682CMS8-3.3 | Doubler Charge Pump with Linear Regulator, Fixed, 2.0 to 4.4Vin, 3.3Vout @ 50mA | 联系凌力尔特 |
| DC332A | LTC1682CMS8 | White LED Driver, 3.0V to 4.2V Input, 75mA Output (5 White LEDs) | 联系凌力尔特 |
数据表设计要点可靠性数据LT JournalCAD 符号 | 相关产品 |
