LT1619 - LT1619是Low Voltage Current Mode PWM Controller

LT1619是LINEAR凌力尔特公司的一款SEPIC 稳压器产品，LT1619是LT1619是Low Voltage Current Mode PWM Controller，本站介绍了LT1619的封装应用图解、特点和优点、功能等，并给出了与LT1619相关的LINEAR元器件型号供参考。

LT1619 - LT1619是Low Voltage Current Mode PWM Controller - SEPIC 稳压器 - 电源管理 - 凌力尔特

LT1619 - Low Voltage Current Mode PWM Controller

LT1619 - Low Voltage Current Mode PWM Controller - Linear Technology（凌力尔特）

功能描述

The LT1619 is a fixed frequency PWM controller for implementing current mode DC/DC converters with minimum external parts. The LT1619 operates with input voltages ranging from 1.9V to 18V and is suitable for a variety of battery-powered and distributed DC/DC converters. The internal rail-to-rail N-channel MOSFET driver operates either from the input in the nonbootstrapped mode or from the output in bootstrapped operation. The driver is designed to drive a low side power transistor inboost, SEPIC, flyback and other topologies.

Converter efficiency is improved at heavy loads with a53mV current sense voltage and at light load with Burst Mode operation. The operating frequency is internally setat 300kHz. The oscillator can also be synchronized externally up to 500kHz. No load quiescent current is 140μA and shutdown current is 15μA.

The LT1619 is available in 8-lead MSOP and SO packages.

特点

Wide VIN Range: 1.9V to 18V

300kHz Fixed Frequency Current Mode Control

1A Rail-to-Rail N-Channel MOSFET Driver

Low 53mV Current Limit Threshold Voltage Improves Efficiency

Implements Boost, SEPIC and Flyback Converters Requiring Low Side Power Transistors

Internal Current Sense Amplifier with Leading Edge Blanking

Up to 500kHz External Synchronization

Burst Mode Operation for High Efficiency at Light Load

140μA Quiescent Current

15μA Shutdown Current

8-Lead MSOP and SO Packages

应用

3.3V to 5V DC/DC Converters

Distributed Power Supplies

Isolated Power Supplies

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

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)
LT1619EMS8	MS-8	E	$2.49	$2.10
LT1619EMS8#PBF	MS-8	E	$2.49	$2.10
LT1619EMS8#TR	MS-8	E		$2.16
LT1619EMS8#TRPBF	MS-8	E		$2.16
LT1619ES8	SO-8	E	$2.35	$1.99
LT1619ES8#PBF	SO-8	E	$2.35	$1.99
LT1619ES8#TR	SO-8	E		$2.05
LT1619ES8#TRPBF	SO-8	E		$2.05

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