Datasheet > LT1619EMS8

LT1619EMS8

更新时间： 2024-11-20 22:25:55

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
20页	257K
描述
Low Voltage Current Mode PWM Controller

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中文翻译

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LT1619EMS8 数据手册

LT1619

Low Voltage Current Mode

PWM Controller

FEATURES

DESCRIPTIO

■

Wide V_INRange: 1.9V to 18V

The LT^®1619 is a fixed frequency PWM controller for

implementing current mode DC/DC converters with mini-

mum 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 con-

verters. 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 in

boost, SEPIC, flyback and other topologies.

■

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

■

Converter efficiency is improved at heavy loads with a

53mV current sense voltage and at light load with Burst

Mode operation. The operating frequency is internally set

at 300kHz. The oscillator can also be synchronized exter-

nallyupto500kHz.Noloadquiescentcurrentis140µAand

shutdown current is 15µA.

at Light Load

■

140µA Quiescent Current

■

15µA Shutdown Current

■

8-Lead MSOP and SO Packages

APPLICATIO S

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

, LTC and LT are registered trademarks of Linear Technology Corporation.

Burst Mode is a registered trademark of Linear Technology Corporation.

■

3.3V to 5V DC/DC Converters

■

Distributed Power Supplies

■

Isolated Power Supplies

TYPICAL APPLICATIO

Efficiency

3.3V

37.4k

S/S

5.6µH

0.1µF

22µF

12.4k

DRV

LT1619

GATE

OUT

0.1µF

2.2A

Si9804

75k

15nF

OUT

440µF

GND SENSE

220pF

SENSE

0.01Ω

1619 F01

C1: PANASONIC EEFCDOK220R

100

1000

: KEMET T495X227K010AS (×2)

OUT

LOAD CURRENT (mA)

D1: MBRD835L

1619 F01a

L1: COILCRAFT DO5022P-562

Figure 1. High Efficiency 3.3V to 5V DC/DC Converter

1619fa

12 3 4 5 6 7...20

中文翻译

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与LT1619EMS8相关器件

型号	品牌	获取价格	描述	数据表
LT1619EMS8#TR	Linear	获取价格	LT1619 - Low Voltage Current Mode PWM Controller; Package: MSOP; Pins: 8; Temperature Rang
LT1619ES8	Linear	获取价格	Low Voltage Current Mode PWM Controller
LT1619ES8#PBF	Linear	获取价格	暂无描述
LT1619ES8#TR	Linear	获取价格	LT1619 - Low Voltage Current Mode PWM Controller; Package: SO; Pins: 8; Temperature Range:
LT1619ES8#TRPBF	Linear	获取价格	LT1619 - Low Voltage Current Mode PWM Controller; Package: SO; Pins: 8; Temperature Range:
LT1620	Linear	获取价格	Rail-to-Rail Current Sense Amplifier
LT1620_15	Linear	获取价格	Rail-to-Rail Current Sense Amplifier
LT1620CGN	Linear	获取价格	Rail-to-Rail Current Sense Amplifier
LT1620CGN#PBF	Linear	获取价格	LT1620 - Rail-to-Rail Current Sense Amplifier; Package: SSOP; Pins: 16; Temperature Range:
LT1620CGN#TR	Linear	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO16, 0.150 INCH, PLASTIC, SSOP-16, Analog IC:Other

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