Datasheet > LT3958

LT3958

更新时间： 2024-11-23 05:43:35

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
28页	320K
描述
High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter

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中文翻译

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LT3958 数据手册

LT3958

High Input Voltage,

Boost, Flyback, SEPIC and

Inverting Converter

FEATURES

DESCRIPTION

The LT^®3958 is a wide input range, current mode, DC/DC

converter which is capable of generating either positive

or negative output voltages. It can be conﬁgured as either

a boost, ﬂyback, SEPIC or inverting converter. It features

an internal low side N-channel power MOSFET rated for

84V at 3.3A and driven from an internal regulated 7.2V

supply. The ﬁxed frequency, current-mode architecture

results in stable operation over a wide range of supply

and output voltages.

Wide Input Voltage Range: 5V to 80V

Single Feedback Pin for Positive or Negative

Output Voltage

Internal 3.3A/84V Power Switch

Current Mode Control Provides Excellent Transient

Response

Programmable Operating Frequency (100kHz to

1MHz) with One External Resistor

Synchronizeable to an External Clock

Low Shutdown Current < 1μA

The operating frequency of LT3958 can be set with an

external resistor over a 100kHz to 1MHz range, and can

be synchronized to an external clock using the SYNC pin.

A minimum operating supply voltage of 5V, and a low

shutdown quiescent current of less than 1μA, make the

LT3958 ideally suited for battery-powered systems.

Internal 7.2V Low Dropout Voltage Regulator

Programmable Input Undervoltage Lockout with

Hysteresis

Programmable Soft-Start

Thermally Enhanced QFN (5mm × 6mm) Package

The LT3958 features soft-start and frequency foldback

functions to limit inductor current during start-up.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

APPLICATIONS

Automotive

No R

and ThinSOT are trademarks of Linear Technology Corporation.

SENSE

Telecom

All other trademarks are the property of their respective owners. Patents pending.

Industrial

TYPICAL APPLICATION

High Efﬁciency Boost Converter

Efﬁciency vs Output Current

33μH

OUT

100

= 24V

48V

12V TO 40V

0.5A

4.7μF

392k

EN/UVLO

GND

53.6k

LT3958

SGND

SYNC

SENSE1

464k

SENSE2

FBX

INTV

RT SS

10k

10nF

15.8k

41.2k

300kHz

0.33μF

4.7μF

400

500

100

200

300

OUTPUT CURRENT (mA)

3958 TA01b

3958 TA01a

3958f

12 3 4 5 6 7...28

中文翻译

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与LT3958相关器件

型号	品牌	获取价格	描述	数据表
LT3958EUHE#PBF	Linear	获取价格	LT3958 - High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter; Package: QFN;
LT3958EUHE#TRPBF	Linear	获取价格	LT3958 - High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter; Package: QFN;
LT3958EUHEPBF	Linear	获取价格	High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter
LT3958EUHETRPBF	Linear	获取价格	High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter
LT3958IUHE#PBF	Linear	获取价格	LT3958 - High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter; Package: QFN;
LT3958IUHE#TRPBF	Linear	获取价格	LT3958 - High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter; Package: QFN;
LT3958IUHEPBF	Linear	获取价格	High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter
LT3958IUHETRPBF	Linear	获取价格	High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter
LT3959	Linear	获取价格	Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch
LT3959	ADI	获取价格	具 6A、40V 开关的宽输入电压范围升压 / SEPIC / 负输出转换器

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