LTC3563 - LTC3563是500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage

LTC3563是LINEAR凌力尔特公司的一款微功率降压产品，LTC3563是LTC3563是500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage，本站介绍了LTC3563的封装应用图解、特点和优点、功能等，并给出了与LTC3563相关的LINEAR元器件型号供参考。

LTC3563 - LTC3563是500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage - 微功率降压 - 电源管理 - 凌力尔特

LTC3563 - 500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage

LTC3563 - 500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage - Linear Technology（凌力尔特）

功能描述

The LTC3563 is a high efficiency monolithic synchronous buck converter using a constant frequency, current mode architecture. A voltage select input allows the user to program the output voltage to 1.28V or 1.87V. Supply current during operation is only 26µA, dropping to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3563 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Internal power switches are optimized to provide high efficiency and eliminate the need for an external Schottky diode.

The switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors. The LTC3563 is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The LTC3563 is configured for the power saving Burst Mode Operation.

特点

High Efficiency: Up to 96%

Pin Selectable Output Voltage: 1.28V/1.87V

Low Ripple (<20mVP-P) Burst Mode Operation: IQ = 26µA

Very Low Quiescent Current: Only 26µA

2.5V to 5.5V Input Voltage Range

2.25MHz Constant Frequency Operation

Low Dropout Operation: 100% Duty Cycle

No Schottky Diode Required

Internal Soft-Start Limits Inrush Current

Shutdown Mode Draws <1µA Supply Current