LTC1550L - Low Noise, Switched Capacitor Regulated Voltage Inverters

The LTC™1550L/LTC1551L are switched capacitor charge pump voltage inverters which include internal linear post-regulators to minimize output ripple. The LTC1550L fixed output voltage versions include ±4.1V, ±2.5V and ±2V with ripple voltages typically below 1mVP-P. The LTC1550L is also available in an adjustable output voltage version. The LTC1550L/LTC1551L are ideal for use as bias voltage generators for GaAs transmitter FETs in portable RF and cellular telephone applications.

The LTC1550L/LTC1551L operate from single 2.7V to 5.5V supplies and draw typical quiescent currents of 3.5mA with a 5V supply. Each device includes a TTL compatible Shutdown pin which drops supply current to 0.2µA typically. The LTC1550L Shutdown pin is active low (SHDN), while the LTC1551L 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 LTC1550L/LTC1551L require two additional resistors to set the output voltage. The LTC1550L/LTC1551L will supply up to 20mA (depending on VCC to VOUT range), while maintaining guaranteed output regulation of ±2.5%.

Both fixed voltage and adjustable LTC1550L/LTC1551L are available in 8-lead MSOP and SO plastic packages: the adjustable LTC1550L is also available in a 16-pin SSOP with the REG pin.

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, ±2.5V, ±2V or Adjustable Output
  • Shutdown Mode Drops Supply Current to <1µA
  • High Output Current: Up to 20mA (Depending on VCC to VOUT Range)
  • Output Regulation: 2.5% Over Line, Load and Temperature
  • Available in 8-Lead MSOP, 8-Lead Narrow SO and 16-Lead Narrow SSOP
典型应用
LTC1550L Typical Application
LTC1550L Typical Application
应用
  • GaAs FET Bias Generators
  • Negative Supply Generators
  • Battery-Powered Systems
  • Single Supply Applications
封装信息
LTC1550L Package Drawing
LTC1550L Package Drawing
LTC1550L Package Drawing
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) *
LTC1550LCGN#PBFSSOP-16C$2.25$1.90
LTC1550LCGN#TRPBFSSOP-16C$1.96
LTC1550LCMS8-2.5#PBFMS-8C$2.25$1.90
LTC1550LCMS8-2.5#TRPBFMS-8C$1.96
LTC1550LCMS8-2#PBFMS-8C$2.25$1.90
LTC1550LCMS8-2#TRPBFMS-8C$1.96
LTC1550LCMS8-4.1#PBFMS-8C$2.25$1.90
LTC1550LCMS8-4.1#TRPBFMS-8C$1.96
LTC1550LCMS8#PBFMS-8C$2.25$1.90
LTC1550LCMS8#TRPBFMS-8C$1.96
LTC1550LCS8-2.5#PBFSO-8C$2.00$1.70
LTC1550LCS8-2.5#TRPBFSO-8C$1.76
LTC1550LCS8-2#PBFSO-8C$2.00$1.70
LTC1550LCS8-2#TRPBFSO-8C$1.76
LTC1550LCS8-4.1#PBFSO-8C$2.00$1.70
LTC1550LCS8-4.1#TRPBFSO-8C$1.76
LTC1550LCS8#PBFSO-8C$2.00$1.70
LTC1550LCS8#TRPBFSO-8C$1.76
LTC1550LIGN#PBFSSOP-16I$2.65$2.25
LTC1550LIGN#TRPBFSSOP-16I$2.31
演示电路板
器件型号描述价格
DC092A-ALTC1550LCS8 | -4.1V OUTPUT GaAs FET BIAS GENERATOR ACTIVE LOW SHUTDOWN$100.00
数据表
可靠性数据
CAD 符号
相关产品
LTC1550L/LTC1551L - Low Noise, Switched Capacitor Regulated Voltage Inverters
LTC1551L Package Drawing LTC1551L
LTC1551L Package Drawing LTC1551L
R320 Reliability Data
LTC1550L Footprints and Symbols