LT1170C

更新时间： 2024-11-12 22:34:19

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
20页	269K
描述
100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators

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LT1170C 数据手册

LT1170/LT1171/LT1172

100kHz, 5A, 2.5A and 1.25A

High Efficiency Switching Regulators

FEATURES

DESCRIPTIO

■

Wide Input Voltage Range: 3V to 60V

The LT^®1170/LT1171/LT1172 are monolithic high power

switching regulators. They can be operated in all standard

switching configurations including buck, boost, flyback,

forward, inverting and “Cuk.” A high current, high effi-

■

Low Quiescent Current: 6mA

■

Internal 5A Switch (2.5A for LT1171,

1.25A for LT1172)

■

Shutdown Mode Draws Only 50µA Supply Current

Very Few External Parts Required

ciency switch is included on the die along with all oscilla-

tor, control and protection circuitry. Integration of all

functionsallowstheLT1170/LT1171/LT1172tobebuiltin

astandard5-pinTO-3orTO-220powerpackageaswellas

the 8-pin packages (LT1172). This makes them extremely

easy to use and provides “bust proof” operation similar to

Self-Protected Against Overloads

Operates in Nearly All Switching Topologies

Flyback-Regulated Mode Has Fully Floating Outputs

Comes in Standard 5-Pin Packages

LT1172 Available in 8-Pin MiniDIP and Surface Mount that obtained with 3-pin linear regulators.

Packages

Can Be Externally Synchronized

The LT1170/LT1171/LT1172 operate with supply volt-

■

ages from 3V to 60V, and draw only 6mA quiescent

current. They can deliver load power up to 100W with no

external power devices. By utilizing current-mode switch-

ing techniques, they provide excellent AC and DC load and

line regulation.

APPLICATIO S

■

Logic Supply 5V at 10A

■

5V Logic to ±15V Op Amp Supply

The LT1170/LT1171/LT1172 have many unique features

not found even on the vastly more difficult to use low

powercontrolchipspresentlyavailable. Theyuseadaptive

antisat switch drive to allow very wide ranging load cur-

rents with no loss in efficiency. An externally activated

shutdown mode reduces total supply current to 50µA

typically for standby operation.

■

Battery Upconverter

■

Power Inverter (+ to –) or (– to +)

■

Fully Floating Multiple Outputs

USER NOTE:

Thisdatasheetisonlyintendedtoprovidespecifications,graphs,andageneralfunctionaldescription

of the LT1170/LT1171/LT1172. Application circuits are included to show the capability of the

LT1170/LT1171/LT1172. A complete design manual (AN19) should be obtained to assist in

developing new designs. This manual contains a comprehensive discussion of both the LT1070 and

the external components used with it, as well as complete formulas for calculating the values of these

components. ThemanualcanalsobeusedfortheLT1170/LT1171/LT1172byfactoringinthehigher

frequency. A CAD design program called SwitcherCAD^TMis also available.

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

SwitcherCAD is a trademark of Linear Technology Corporation.

TYPICAL APPLICATIO

Boost Converter (5V to 12V)

Maximum Output Power*

L1**

OUTPUT

FILTER

50µH

100

10µH

* ROUGH GUIDE ONLY. BUCK MODE

LT1170

= (5A)(V

)

OUT

100µF

SPECIAL TOPOLOGIES DELIVER

MORE POWER.

** DIVIDE VERTICAL POWER SCALE

BY TWO FOR LT1171, BY FOUR

FOR LT1172.

MBR330

BUCK-BOOST

= 30V

12V

BOOST

1000µF

10.7k

LT1170/1/2 TA02

LT1170

FLYBACK

C3*

100µF

GND

1.24k

1µF

BUCK-BOOST

= 5V

*REQUIRED IF INPUT LEADS ≥ 2"

** COILTRONICS 50-2-52

PULSE ENGINEERING 92114

INPUT VOLTAGE (V)

1170/1/2 TA01

12 3 4 5 6 7...20

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与LT1170C相关器件

型号	品牌	获取价格	描述	数据表
LT1170CK	Linear	获取价格	100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
LT1170CQ	Linear	获取价格	100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
LT1170CQ#TRPBF	Linear	获取价格	暂无描述
LT1170CT	Linear	获取价格	100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
LT1170CT#06PBF	Linear	获取价格	LT1170 - 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators; Package: TO-220;
LT1170CT#PBF06	Linear	获取价格	IC 11 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PZFM5, PLASTIC, TO-220, 5 PIN, Sw
LT1170HV	Linear	获取价格	100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
LT1170HVC	Linear	获取价格	100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators
LT1170HVCK	Linear	获取价格	IC 5 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, MBFM2, METAL CAN, TO-3, 2 PIN, Swi
LT1170HVCQ	ETC	获取价格	SMPS Controller

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