Datasheet > LT1074I

LT1074I

更新时间： 2024-11-25 01:15:07

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
16页	190K
描述
Step-Down Switching Regulator

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LT1074I 数据手册

LT1074/LT1076

Step-Down Switching

Regulator

ponents,areincludedonthechip.Thetopologyisaclassic

positive “buck” configuration but several design innova-

tions allow this device to be used as a positive-to-negative

converter, a negative boost converter, and as a flyback

converter. The switch output is specified to swing 40V

below ground, allowing the LT1074 to drive a tapped-

inductor in the buck mode with output currents up to 10A.

FEATURES

■

5A Onboard Switch (LT1074)

■

Operates Up to 60V Input

■

100kHz Switching Frequency

■

Greatly Improved Dynamic Behavior

■

Available in Low Cost 5 and 7-Lead Packages

■

Only 8.5mA Quiescent Current

The LT1074 uses a true analog multiplier in the feedback

loop. This makes the device respond nearly instanta-

neously to input voltage fluctuations and makes loop gain

independent of input voltage. As a result, dynamic behav-

ior of the regulator is significantly improved over previous

designs.

■

Programmable Current Limit

■

Micropower Shutdown Mode

APPLICATIO S

■

Buck Converter with Output Voltage Range of 2.5V

On-chip pulse by pulse current limiting makes the LT1074

nearlybust-proofforoutputoverloadsorshorts.Theinput

voltage range as a buck converter is 8V to 60V, but a self-

boot feature allows input voltages as low as 5V in the

inverting and boost configurations.

to 50V

■

Tapped-Inductor Buck Converter with 10A Output

at 5V

■

Positive-to-Negative Converter

■

Negative Boost Converter

■

Multiple Output Buck Converter

TheLT1074isavailableinlowcostTO-220orDDpackages

with frequency pre-set at 100kHz and current limit at 6.5A

(LT1076 = 2.6A). A 7-pin TO-220 package is also available

which allows current limit to be adjusted down to zero. In

addition, full micropower shutdown can be programmed.

See Application Note 44 for design details.

DESCRIPTIO

The LT^®1074 is a 5A (LT1076 is rated at 2A) monolithic

bipolar switching regulator which requires only a few

external parts for normal operation. The power switch, all

oscillator and control circuitry, and all current limit com-

A fixed 5V output, 2A version is also available. See LT1076-5.

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

Buck Converter Efficiency

TYPICAL APPLICATIO

LT1074

Basic Positive Buck Converter

100

L1**

50µH (LT1074)

= 12V, V = 20V

OUT

100µH (LT1076)

* USE MBR340 FOR LT1076

** COILTRONICS #50-2-52 (LT1074)

#100-1-52 (LT1076)

PULSE ENGINEERING, INC.

#PE-92114 (LT1074)

10V TO 40V

2.8k

LT1074

MBR745*

= 5V, V = 15V

OUT

GND

#PE-92102 (LT1076)

HURRICANE #HL-AK147QQ (LT1074)

2.21k

L = 50µH TYPE 52 CORE

DIODE = MBR735

2.7k

#HL-AG210LL (LT1076)

C3^†

200µF

0.01µF

500µF

25V

†

RIPPLE CURRENT RATING ≥ I /2

OUT

OUTPUT LOAD CURRENT (A)

LT1074•TPC27

LT1074•TA01

sn1074 1074fds

12 3 4 5 6 7...16

中文翻译

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与LT1074I相关器件

型号	品牌	获取价格	描述	数据表
LT1074IT	Linear	获取价格	Step-Down Switching Regulator
LT1074IT7	Linear	获取价格	Step-Down Switching Regulator
LT1074IY	ETC	获取价格	Current-Mode SMPS Controller
LT1074MK	Linear	获取价格	Step-Down Switching Regulator
LT1074MK/883	Linear	获取价格	IC 5.5 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, MBFM2, METAL CAN, TO-3, 4 PIN, S
LT1076	Linear	获取价格	Step-Down Switching Regulator
LT1076	ADI	获取价格	降压型开关稳压器
LT1076_15	Linear	获取价格	Step-Down Switching Regulator
LT1076-5	Linear	获取价格	5V Step-Down Switching Regulator
LT1076-5	ADI	获取价格	5V 降压型开关稳压器

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