Datasheet > LT3509

LT3509

更新时间： 2023-12-20 18:46:29

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
24页	320K
描述
双通道、36V、700mA 降压型稳压器

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LT3509 数据手册

LT3509

Dual 36V, 700mA

Step-Down Regulator

FeaTures

DescripTion

TheLT^®3509isadual,currentmode,step-downswitching

regulator, with internal power switches each capable of

providing700mAoutputcurrent.Thisregulatorprovidesa

compactandrobustsolutionformulti-railsystemsinharsh

environments. It incorporates several protection features

including overvoltage lockout and cycle-by-cycle current

limit. Thermal shutdown provides additional protection.

Theloopcompensationcomponentsandtheboostdiodes

are integrated on-chip. Switching frequency is set by a

single external resistor. External synchronization is also

possible. The high maximum switching frequency allows

the use of small inductors and ceramic capacitors for low

ripple. Constant frequency operation above the AM band

avoidsinterferencewithradioreception,makingtheLT3509

well suited for automotive applications. Each regulator

has an independent shutdown and soft-start control pin.

When both converters are powered down, the common

circuitry enters a low current shutdown state.

Two 700mA Switching Regulators with Internal

Power Switches

Wide 3.6V to 36V Operating Range

Overvoltage Lockout Protects Circuit Through 60V

Supply Transients

Short-Circuit Robust

Low Dropout Voltage: 95% Maximum Duty Cycle

Adjustable 300kHz to 2.2MHz Switching Frequency

Synchronizable Over the Full Range

Uses Small Inductors and Ceramic Capacitors

Integrated Boost Diodes

Internal Compensation

Thermally Enhanced 14-Lead (4mm × 3mm)

DFN and 16 Lead MSOP Packages

applicaTions

Automotive Electronics

Industrial Controls

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

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

Wall Transformer Regulation

Networking Devices

CPU, DSP, or FPGA Power

Typical applicaTion

3.3V and 5V Dual Output Step-Down Converter

Efﬁciency

6.5V TO 36V

(TRANSIENT TO 60V)

2.2µF

= 5V

OUT

BOOST1

BOOST2

0.1µF

10µH

6.8µH

= 3.3V

OUT

3.3V

700mA

SW1

SW2

LT3509

31.6k

53.6k

DA1

FB1

DA2

FB2

MBRM140

22µF

RUN/SS1 RUN/SS2

10µF

= 12V

1nF

SYNC RT

= 700kHz

1nF

10.2k

GND

10.2k

60.4k

0.2 0.3 0.4 0.5 0.6

LOAD CURRENT (A)

0.0

0.7

0.1

3509 TA01a

= 700kHz

3509 TA01b

3509fd

For more information www.linear.com/LT3509

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LT3509EDE#PBF	Linear	LT3509 - Dual 36V, 700mA Step-Down Regulator; Package: DFN; Pins: 14; Temperature Range: -	获取价格
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LT3509EMSE#PBF	Linear	暂无描述	获取价格
LT3509EMSE#TRPBF	Linear	LT3509 - Dual 36V, 700mA Step-Down Regulator; Package: MSOP; Pins: 16; Temperature Range:	获取价格