LTC1879 - LTC1879是1.2A Synchronous Step-Down Regulator with 15μA Quiescent Current

LTC1879是LINEAR凌力尔特公司的一款微功率降压产品，LTC1879是LTC1879是1.2A Synchronous Step-Down Regulator with 15μA Quiescent Current，本站介绍了LTC1879的封装应用图解、特点和优点、功能等，并给出了与LTC1879相关的LINEAR元器件型号供参考。

LTC1879 - LTC1879是1.2A Synchronous Step-Down Regulator with 15μA Quiescent Current - 微功率降压 - 电源管理 - 凌力尔特

LTC1879 - 1.2A Synchronous Step-Down Regulator with 15μA Quiescent Current

LTC1879 - 1.2A Synchronous Step-Down Regulator with 15μA Quiescent Current - Linear Technology（凌力尔特）

功能描述

The LTC?1879 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Operating supply current is only 15μA with no load and drops to <1μA in shutdown. The input supply voltage range of 2.65V to 10V makes the LTC1879 ideally suited for both single and dual Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.

The switching frequency is internally set to 550kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC1879 can be externally synchronized from 350kHz to 750kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low.

The internal synchronous rectifier switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with a 0.8V feedback reference voltage. The LTC1879 is available in a 16-lead SSOP package.

特点

High Efficiency: Up to 95%

Low Quiescent Current: Only 15µA with No Load

550kHz Constant Frequency Operation

2.65V to 10V Input Voltage Range

VOUT from 0.8V to VIN, IOUT to 1.2A

True PLL Frequency Locking from 350kHz to 750kHz

Power Good Output Voltage Monitor

Low Dropout Operation: 100% Duty Cycle

Burst Mode® or Pulse Skipping Operation

Current Mode Operation for Excellent Line and Load Transient Response

Shutdown Mode Draws <1µA Supply Current