Datasheet > LT3150

LT3150

更新时间： 2024-11-23 14:57:39

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
20页	259K
描述
快速瞬态响应、低输入电压、非常低压差线性稳压器

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中文翻译

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数据手册

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LT3150 数据手册

LT3150

Fast Transient Response,

Low Input Voltage, Very Low Dropout

Linear Regulator Controller

FEATURES

DESCRIPTIO

TheLT^®3150drivesalowcostexternalN-channelMOSFET

as a source follower to produce a fast transient response,

very low dropout voltage linear regulator. Selection of the

N-channelMOSFETR_DS(ON)allowsdropoutvoltagesbelow

300mV for low V_INto low V_OUTapplications.

■

Fast Transient Response Optimized with

Ceramic Output Capacitors

■

FET R_DS(ON)Defines Dropout Voltage

■

±1% Reference Tolerance Over Temperature

Multifunction LDO Shutdown Pin with Latchoff

Fixed Frequency 1.4MHz Boost Converter Generates

MOSFET Gate Drive

■

The LT3150 includes a fixed frequency boost regulator

that generates gate drive for the N-channel MOSFET. The

internally compensated current mode PWM architecture

combined with the 1.4MHz switching frequency permits

the use of tiny, low cost capacitors and inductors.

■

Internally Compensated Boost Converter Uses Tiny

Capacitors and Inductor

Independent Boost Converter Shutdown Control

Permits LDO Output Voltage Supply Sequencing

16-Lead SSOP Package

The LT3150’s transient load performance is optimized

with ceramic output capacitors. A precision 1.21V refer-

ence accommodates low voltage supplies.

APPLICATIO S

Protection includes a high side current limit amplifier that

activates a fault timer circuit. A multifunction shutdown

pin provides either current limit time-out with latchoff,

overvoltageprotectionorthermalshutdown. Independent

shutdown control of the boost converter provides on/off

and sequencing control of the LDO output voltage.

■

Microprocessor, ASIC and I/O Supplies

■

Very Low Dropout Input-to-Output Conversion

■

Logic Termination Supplies

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

TYPICAL APPLICATIO

1.8V to 1.5V, 4A Very Low Dropout Linear Regulator

(Typical Dropout Voltage = 65mV at I_OUT= 4A)

Transient Response for

0.1A to 4A Output Load Step

MBR0520L

4.7µF

6.19k

LT3150

10µH

5.1Ω

50mV/DIV

FB1

IN1

IN2

1.37k

SHDN2 SHDN1

SWGND

GND

POS

1.8V

NEG

220µF

2.5V

×2

2A/DIV

Si4410

GND

GATE

FB2

COMP

1.5V

OUT

243Ω

2.2µF ×10

1.5k

X5R CERAMIC

0805 CASE

3150 TA02

20µs/DIV

6800pF

50pF

1020Ω

: PANASONIC SP SERIES EEFUE0E221R 20%

C1: AVX TAJA475M020R 20V 20%

L1: MURATA LQH32CN100K11 OR SUMIDA CDRH3D16100

3150 TA01

3150f

12 3 4 5 6 7...20

中文翻译

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