LTC3830 - High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

The LTC®3830/LTC3830-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 1.xV-3.xV step-down applications. A precision internal reference and feedback system provide ±1% output regulation over temperature, load current and line voltage variations. The LTC3830/LTC3830-1 use a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without a current sense resistor.

The LTC3830/LTC3830-1 operate with an input supply voltage as low as 3V and with a maximum duty cycle of >91% over temperature. They include a fixed frequency PWM oscillator for low output ripple operation. The 200kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to 500kHz. In shutdown mode, the LTC3830 supply current drops to <10µA. The LTC3830-1 differs from the LTC3830 S8 version by replacing shutdown with a soft-start function.

For a similar, pin compatible DC/DC converter with an output voltage as low as 0.6V, please refer to the LTC3832.

特点
  • High Power Switching Regulator Controller for 3.3V-5V to 1.xV-3.xV Step-Down Applications
  • No Current Sense Resistor Required
  • Low Input Supply Voltage Range: 3V to 8V
  • Maximum Duty Cycle >91% Over Temperature
  • All N-Channel External MOSFETs
  • Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations
  • High Efficiency: Over 95% Possible
  • Adjustable or Fixed 3.3V Output (16-Pin Version)
  • Programmable Fixed Frequency Operation: 100kHz to 500kHz
  • External Clock Synchronization
  • Soft-Start (Some Versions)
  • Low Shutdown Current: <10µA
  • Overtemperature Protection
  • Available in S8, S16 and SSOP-16 Packages
典型应用
LTC3830 Typical Application
LTC3830 Typical Application
应用
  • CPU Power Supplies
  • Multiple Logic Supply Generator
  • Distributed Power Applications
  • High Efficiency Power Conversion
封装信息
LTC3830 Package Drawing
LTC3830 Package Drawing
LTC3830 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) *
LTC3830-1ES8#PBFSO-8E$3.61$3.05
LTC3830-1ES8#TRPBFSO-8E$3.11
LTC3830EGN#PBFSSOP-16E$4.50$3.80
LTC3830EGN#TRPBFSSOP-16E$3.86
LTC3830ES#PBFSO-16E$4.14$3.50
LTC3830ES#TRPBFSO-16E$3.56
LTC3830ES8#PBFSO-8E$3.61$3.05
LTC3830ES8#TRPBFSO-8E$3.11
演示电路板
器件型号描述价格
DC469ALTC3830EGN | High Efficiency Step-Down Power Supply, 3V to 8V Input, 2.5/1.8/1.5Vout @ 15A$125.00
DC493ALTC3830-1ES8 | Low Voltage, 8A DC/DC Converter, Vin = 3V - 8V, Vout = 1.8V @ 8A Max.$125.00
数据表
可靠性数据
LT Journal
CAD 符号
相关产品
LTC3830/LTC3830-1 - High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation
LTC3830 Package Drawing LTC3830
LTC3830 Package Drawing LTC3830
R320 Reliability Data
May 2002 Versatile LTC3830 and LTC3832 Deliver High Efficiency for Step-Down, Step-Up and Inverting Power Conversions
LTC3830 Footprints and Symbols