LTC3423 - Low Output Voltage, 3MHz Micropower Synchronous Boost Converters

The LTC®3423 and LTC3424 are high efficiency, fixed frequency, step-up DC/DC converters that can regulate output voltages as low as 1.5V from a single cell. An applied voltage of at least 2.7V to the VDD pin is required to power the internal control circuitry.

The devices include a 0.16 Ohms N-channel MOSFET switch and a 0.21 Ohms P-channel synchronous rectifier. The LTC3423 is intended for applications requiring less than 0.75W of output power and the LTC3424 for 1.5W or less. Switching frequencies up to 3MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock.

Quiescent current is only 38µA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low then the operation is at constant fixed frequency.

Other features include a 1µA shutdown, thermal shutdown and current limit. The LTC3423 and LTC3424 are available in the 10-lead MSOP package. For applications requiring an output voltage greater than 2.6V, the LTC3401 and LTC3402 are recommended without the need of a separate voltage for the VDD pin.

特点
  • 1.5V to 5.5V Adjustable Output Voltage
  • Synchronous Rectification: Up to 95% Efficiency
  • 1A Switch Current (LTC3423) or2A Switch Current (LTC3424)
  • Fixed Frequency Operation Up to 3MHz
  • Wide Input Range: 0.5V to 5.5V (Operating)
  • Very Low Quiescent Current: 38µA (Burst Mode™ Operation)
  • No External Schottky Diode Required
  • Synchronizable Switching Frequency
  • Burst Mode Enable Control
  • OPTI-LOOP™ Compensation
  • Very Low Shutdown Current: <1µA
  • Small 10-Pin MSOP Package
典型应用
LTC3423 Typical Application
LTC3423 Typical Application
应用
  • Pagers
  • Handheld Instruments
  • Cordless Phones
  • Wireless Handsets
  • GPS Receivers
  • Battery Backup
封装信息
LTC3423 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) *
LTC3423EMS#PBFMS-10E$3.08$2.60
LTC3423EMS#TRPBFMS-10E$2.66
演示电路板
器件型号描述价格
DC516A-ALTC3423EMS Demo Board | 1V ≤ VIN ≤ 1.6V, Vout = 1.8V @ 350mA$100.00
数据表
可靠性数据
LT Journal
CAD 符号
相关产品
LTC3423/LTC3424 - Low Output Voltage, 3MHz Micropower Synchronous Boost Converters
R415 - Reliability Data
Mar 2002 Low Output Voltage Synchronous Boost Regulators Extend Battery Life in Single Cell Applications
LTC3423 Footprints and Symbols