LTC1551是Low Noise, Switched Capacitor-Regulated Voltage Inverters

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LTC1551 - LTC1551是Low Noise, Switched Capacitor-Regulated Voltage Inverters

LTC1551是Linear公司的一款GaAsFET 偏置发生器产品，LTC1551是Low Noise, Switched Capacitor-Regulated Voltage Inverters，本站介绍了LTC1551的封装应用图解、特点和优点、功能等，并给出了与LTC1551相关的凌力尔特元器件型号供参考。

LTC1551 - Low Noise, Switched Capacitor-Regulated Voltage Inverters

LTC1551 - Low Noise, Switched Capacitor-Regulated Voltage Inverters - Linear Technology（凌力尔特）

功能描述

The LTC1550/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.

特点

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

应用