LTC1574CS#PBF

更新时间： 2024-11-21 13:02:51

品牌	Logo	应用领域
凌特 - Linear		转换器肖特基二极管
页数	文件大小	规格书
8页	228K
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LTC1574CS#PBF 数据手册

LTC1574

LTC1574-3.3/LTC1574-5

High Efficiency Step-Down

DC/DC Converters

with Internal Schottky Diode

FEATURES

DESCRIPTION

The LTC^®1574 is a family of easy-to-use current mode

DC/DC converters ideally suited for 9V to 5V, 5V to 3.3V

and inverting operation. With an internal 0.9Ω switch (at

a supply voltage of 12V) and a low forward drop Schottky

diode (0.450V typ at 200mA, T_A= 25°C), the LTC1574

requires only three external components to construct a

complete high efficiency DC/DC converter.

■

High Efficiency: Up to 94%

■

Usable in Noise-Sensitive Products

■

Peak Inductor Current Independent of Inductor Value

■

Short-Circuit Protection

■

Internal Low Forward Drop Schottky Diode

■

Only Three External Components Required

■

Wide V_INRange: 4V to 18.5V (Absolute Maximum)

Low Dropout Operation

Low-Battery Detector

■

Under no load condition, the LTC1574 draws only 130µA.

In shutdown, it draws a mere 2µA making this converter

ideal for battery-powered applications. In dropout, the

internal P-channel MOSFET switch is turned on continu-

ously allowing the user to maximize the life of the battery

source.

■

Pin Selectable Current Limit

■

Internal 0.9Ω Power Switch: V_IN= 12V

■

Standby Current: 130µA

■

Active Low Micropower Shutdown

The maximum inductor current of the LTC1574 family is

pin selectable to either 340mA or 600mA, optimizing

efficiency for a wide range of applications. Operation up to

200kHz permits the use of small surface mount inductors

and capacitors.

APPLICATIONS

■

Inverting Converters

■

Step-Down Converters

■

Memory Backup Supply

■

Portable Instruments

For applications requiring higher output current or ultra-

highefficiency,seetheLTC1148andLTC1265datasheets.

For detailed applications information, see the LTC1174

data sheet.

■

Battery-Powered Equipment

■

Distributed Power Systems

and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.

TYPICAL APPLICATION

LTC1574-5 Efficiency

High Efficiency Step-Down Converter

100

L = 100µH

5.5V to

16V

= 5V

= 0V

OUT

PGM

= 6V

= 9V

22µF*

35V

SHDN

LTC1574-5

OUT

†

100µH

175mA

3, 14

PGM

100µF*

10V

GND

2, 4, 13, 15

AVX TPSD226K035

1574 TA01

** AVX TPSD107K010

LOAD CURRENT (mA)

100 200

†

COILTRONICS CTX100-4

1574 TA02

12 3 4 5 6 7 8

中文翻译

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LTC1574CS#PBF 替代型号

型号	品牌	替代类型	描述	数据表
LTC1574CS#TR	Linear	功能相似	暂无描述

与LTC1574CS#PBF相关器件

型号	品牌	获取价格	描述	数据表
LTC1574CS#TR	Linear	获取价格	暂无描述
LTC1574CS-3.3	Linear	获取价格	High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode
LTC1574CS-3.3#TRPBF	Linear	获取价格	LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode; Package
LTC1574CS-5	Linear	获取价格	High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode
LTC1574CS-5#TR	Linear	获取价格	LTC1574 - High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode; Package
LTC1588	Linear Systems	获取价格	12-/14-/16-Bit SoftSpan DACs with Programmable Output Range
LTC1588	Linear	获取价格	16-/14-/12-Bit VOUT DACs in 3mm 】 3mm DFN
LTC1588	ADI	获取价格	具可编程输出范围的12位SoftSpan DAC
LTC1588_15	Linear	获取价格	12-/14-/16-Bit SoftSpan DACs with Programmable Output Range
LTC1588CG	Linear Systems	获取价格	12-/14-/16-Bit SoftSpan DACs with Programmable Output Range

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