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

LTC3423是LINEAR凌力尔特公司的一款微功率升压产品，LTC3423是LTC3423是Low Output Voltage, 3MHz Micropower Synchronous Boost Converters，本站介绍了LTC3423的封装应用图解、特点和优点、功能等，并给出了与LTC3423相关的LINEAR元器件型号供参考。

LTC3423 - LTC3423是Low Output Voltage, 3MHz Micropower Synchronous Boost Converters - 微功率升压 - 电源管理 - 凌力尔特

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

LTC3423 - Low Output Voltage, 3MHz Micropower Synchronous Boost Converters - Linear Technology（凌力尔特）

功能描述

The LTC3423 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