LTC1551 Low Noise, Switched Capacitor-Regulated Voltage Inverters
The LTC®1550/LTC1551 are switched capacitor charge pump voltage inverters which include internal linear post-regulators to minimize output ripple. Output voltages are fixed at –4.1V, with ripple voltages typically below 1mVP-P. The LTC1550 is also available in an adjustable output voltage version. The LTC1550/LTC1551 are ideal for use as bias voltage generators for GaAs transmitter FETs in portable RF and cellular telephone applications. The LTC1550/LTC1551 operate from single 4.5V to 6.5V supplies and draw typical quiescent currents of 4.25mA with a 5V supply. Each device includes a TTL compatible Shutdown pin which drops supply current to 0.2µA typically. The LTC1550 Shutdown pin is active low (SHDN), while the LTC1551 Shutdown pin is active high (SHDN). Only four external components are required: an input bypass capacitor, two 0.1µF charge pump capacitors and a filter capacitor at the linear regulator output. The adjustable LTC1550 requires two additional resistors to set the output voltage. The LTC1550/LTC1551 will supply up to 10mA output current with a 5V supply, while maintaining guaranteed output regulation of ±5%. The fixed voltage LTC1550/LTC1551 are available in S0-8 plastic packages. The adjustable LTC1550 is available in a 16-pin SSOP
产品特点 Features
- Regulated Negative Voltage from a Single Positive Supply
- Low Output Ripple: Less Than 1mVP-P Typ
- High Charge Pump Frequency: 900kHz Typ
- Small Charge Pump Capacitors: 0.1µF
- Requires Only Four External Capacitors
- Fixed -4.1V or Adjustable Output
- Shutdown Mode Drops Supply Current to < 1µA
- High Output Current: Up to 10mA, VCC = 5V
- Output Regulation: 5%
- Available in SO-8 and 16-Lead SSOP
参数
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应用
- GaAs FET Bias Generators
- Negative Supply Generators
- Battery-Powered Systems
- Single Supply Applications
典型应用图
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LTC1551 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LTC1551CS8-4.1 |
SO |
8 |
C |
$2.85 |
$2.25 |
| LTC1551CS8-4.1#PBF |
SO |
8 |
C |
$2.85 |
$2.25 |
| LTC1551CS8-4.1#TR |
SO |
8 |
C |
|
$2.31 |
| LTC1551CS8-4.1#TRPBF |
SO |
8 |
C |
|
$2.31 |
| LTC1551LCMS8 |
MSOP |
8 |
C |
$2.25 |
$1.90 |
| LTC1551LCMS8#PBF |
MSOP |
8 |
C |
$2.25 |
$1.90 |
| LTC1551LCMS8#TR |
MSOP |
8 |
C |
|
$1.96 |
| LTC1551LCMS8#TRPBF |
MSOP |
8 |
C |
|
$1.96 |
| LTC1551LCMS8-4.1 |
MSOP |
8 |
C |
$2.25 |
$1.90 |
| LTC1551LCMS8-4.1#PBF |
MSOP |
8 |
C |
$2.25 |
$1.90 |
| LTC1551LCMS8-4.1#TR |
MSOP |
8 |
C |
|
$1.96 |
| LTC1551LCMS8-4.1#TRPBF |
MSOP |
8 |
C |
|
$1.96 |
| LTC1551LCS8 |
SO |
8 |
C |
$2.00 |
$1.70 |
| LTC1551LCS8#PBF |
SO |
8 |
C |
$2.00 |
$1.70 |
| LTC1551LCS8#TR |
SO |
8 |
C |
|
$1.76 |
| LTC1551LCS8#TRPBF |
SO |
8 |
C |
|
$1.76 |
| LTC1551LCS8-4.1 |
SO |
8 |
C |
$2.00 |
$1.70 |
| LTC1551LCS8-4.1#PBF |
SO |
8 |
C |
$2.00 |
$1.70 |
| LTC1551LCS8-4.1#TR |
SO |
8 |
C |
|
$1.76 |
| LTC1551LCS8-4.1#TRPBF |
SO |
8 |
C |
|
$1.76 |
LTC1551 数据手册及相关资料下载
- 数据手册(英文) : LTC1550/LTC1551 - Low Noise, Switched Capacitor-Regulated Voltage Inverters.PDF
- 应用指南 (英文) : AN84 - linear Technology Magazine Circuit Collection, Volume IV .PDF
- 设计要点 (英文) : DN142 - Ultralow Quiescent Current DC/DC Converters for Light Load Applications.PDF
- 可靠性数据 : R320 Reliability Data .PDF
