Datasheet > LT1611

LT1611

更新时间： 2024-09-13 14:58:15

品牌	Logo	应用领域
亚德诺 - ADI		开关稳压器
页数	文件大小	规格书
12页	264K
描述
采用 SOT-23 封装的负输出 1.4MHz 开关稳压器

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中文翻译

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LT1611 数据手册

LT1611

Inverting 1.4MHz Switching

Regulator in SOT-23

DESCRIPTIO

FEATURES

TheLT^®1611istheindustry’sfirstinverting5-leadSOT-23

current mode DC/DC converter. Intended for use in small,

low power applications, it operates from an input voltage

as low as 1.1V and switches at 1.4MHz, allowing the use

of tiny, low cost capacitors and inductors 2mm or less in

height. Its small size and high switching frequency enable

the complete DC/DC converter function to consume less

than 0.25 square inches of PC board area. Capable of

generating –5V at 150mA from a 5V supply or –5V at

100mAfroma3Vsupply,theLT1611replacesnonregulated

“charge pump” solutions in many applications.

■

Very Low Noise: 1mV_P–POutput Ripple

■

–5V at 150mA from a 5V Input

■

Better Regulation Than a Charge Pump

■

Effective Output Impedance: 0.14Ω

■

Uses Tiny Capacitors and Inductors

■

Internally Compensated

■

Fixed Frequency 1.4MHz Operation

■

Low Shutdown Current: <1µA

■

Low V_CESATSwitch: 300mV at 300mA

■

Tiny 5-Lead SOT-23 Package

The LT1611 operates in a dual inductor inverting topology

which filters the input side as well as the output side of the

DC/DC converter. Fixed frequency switching ensures a

cleanoutputfreefromlowfrequencynoisetypicallypresent

with charge pump solutions. No load quiescent current of

the LT1611 is 3mA, while in shutdown quiescent current

drops to 0.5µA. The 36V switch allows V_INto V_OUT

differential of up to 33V.

APPLICATIO S

■

MR Head Bias

■

Digital Camera CCD Bias

■

LCD Bias

GaAs FET Bias

Positive-to-Negative Conversion

■

The LT1611 is available in the 5-lead SOT-23 package.

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

TYPICAL APPLICATIO

L1A

22µH

L1B

22µH

Transient Response

1µF

OUT

–5V

SHDN

LT1611

150mA

29.4k

V_OUT

20mV/DIV

AC COUPLED

1200pF

22µF

NFB

GND

10k

150mA

LOAD CURRENT

50mA

C1: AVX TAJB226M010

C2: TAIYO YUDEN LMK212BJ105MG

1611 TA01

100µs/DIV

1611 F10

C3: TAIYO YUDEN JMK325BJ226MM (1210 SIZE)

D1: MBR0520

L1: SUMIDA CLS62-220 OR 2× MURATA LQH3C220 (UNCOUPLED)

Figure 1. 5V to –5V, 150mA Low Noise Inverting DC/DC Converter

12 3 4 5 6 7...12

中文翻译

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与LT1611相关器件

型号	品牌	获取价格	描述	数据表
LT1611CS5	Linear	获取价格	Inverting 1.4MHz Switching Regulator in SOT-23
LT1611CS5#TRMPBF	Linear	获取价格	LT1611 - Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23; Package: SOT; Pins: 5; Tem
LT1611CS5#TRPBF	Linear	获取价格	LT1611 - Inverting 1.4MHz Switching Regulator in 5-Lead SOT-23; Package: SOT; Pins: 5; Tem
LT1612	Linear	获取价格	Synchronous, Step-Down 800kHz PWM DC/DC Converter
LT1612_1	Linear	获取价格	Synchronous, Step-Down 800kHz PWM DC/DC Converter
LT1612EMS8	Linear	获取价格	Synchronous, Step-Down 800kHz PWM DC/DC Converter
LT1612EMS8#PBF	Linear	获取价格	LT1612 - Synchronous, Step-Down 800kHz PWM DC/DC Converter; Package: MSOP; Pins: 8; Temper
LT1612EMS8#TR	Linear	获取价格	LT1612 - Synchronous, Step-Down 800kHz PWM DC/DC Converter; Package: MSOP; Pins: 8; Temper
LT1612EMS8#TRPBF	Linear	获取价格	LT1612 - Synchronous, Step-Down 800kHz PWM DC/DC Converter; Package: MSOP; Pins: 8; Temper
LT1612ES8	Linear	获取价格	Synchronous, Step-Down 800kHz PWM DC/DC Converter

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