Datasheet > LT3667_15

LT3667_15

更新时间： 2024-09-18 01:23:15

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
34页	441K
描述
40V 400mA Step-Down Switching Regulator with Dual Fault Protected LDOs

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LT3667_15 数据手册

LT3667

40V 400mA Step-Down

Switching Regulator with

Dual Fault Protected LDOs

FEATURES

DESCRIPTION

TheLT^®3667isamonolithictriplepowersupplycomposed

of a 400mA buck switching regulator and two 200mA low

dropout linear regulators (LDOs).

Triple Output Supply from a Single Input Requires

Only One Inductor

I = 50μA at 12V to 5V, 3.3V and 2.5V with No Load

Buck Regulator:

The buck regulator includes a high efficiency switch, a

boost diode, and the necessary oscillator, control and

logic circuitry. Current mode topology is used for fast

transient response and good loop stability. Low ripple

Burst Mode operation maintains high efficiency at low

output currents while keeping output ripple below 15mV

in a typical application.

Low Ripple (<15mV ) Burst Mode Operation^®

P-P

400mA Output with Internal Power Switch

4.3V to 40V Input Operation Range (60V Max)

Dual Low Dropout Linear Regulators

200mA Outputs with Programmable Current Limits

1.6V to 45V Input Range

Fault Protected to 45V

Each LDO supplies 200mA of output current with a typical

dropout voltage of 340mV, and each LDO has an accurate

resistor programmable current limit.

Adjustable 250kHz to 2.2MHz Switching Frequency

Synchronizable Between 300kHz and 2.2MHz

Programmable Undervoltage Lockout

Power Good Indicators

Available in a Thermally-Enhanced 16-Lead MSOP

and 24-Lead (3mm × 5mm) QFN Packages

Internal protection circuitry includes reverse-battery

protection, current limiting, thermal limiting and reverse

current protection.

APPLICATIONS

The LT3667 is available in a thermally-enhanced 16-Lead

MSOP and a 24-Pin 3mm x 5mm QFN package with ex-

posed pad for low thermal resistance.

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.

Automotive Battery Regulation

Power for Portable Instrumentation

Industrial Supplies

Fault-Protected Sensor Supply

TYPICAL APPLICATION

6V TO 40V

TRANSIENT

TO 60V

No-Load Supply Current

4.7µF

100

UVLO1 IN1

BOOST

0.22µF 22µH

200mA

ON OFF

22µF

931k

294k

FB1

174k

LT3667

22pF

IN2

IN3

3.3V

100mA

2.5V

100mA

OUT2

FB2

OUT3

340k

158k

499k

4.7µF

2.2µF

FB3

158k

EN2/ILIM2

EN3/ILIM3

GND

INPUT VOLTAGE (V)

3667 TA01a

3667 TA01b

3667fb

For more information www.linear.com/LT3667

12 3 4 5 6 7...34

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与LT3667_15相关器件

型号	品牌	获取价格	描述	数据表
LT3668	Linear	获取价格	40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs
LT3668	ADI	获取价格	具有双故障保护跟踪 LDO 的 40V、400mA 降压型开关稳压器
LT3668_15	Linear	获取价格	40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs
LT3669	ADI	获取价格	具集成型降压转换器和 LDO 的 IO-Link 收发器
LT3669_15	Linear	获取价格	IO-Link Transceiver with Integrated Step-Down Regulator and LDO
LT3669-2_15	Linear	获取价格	IO-Link Transceiver with Integrated Step-Down Regulator and LDO
LT3680	Linear	获取价格	36V, 3.5A, 2.4MHz Step-Down Switching Regulat
LT3680	ADI	获取价格	具 75μA 静态电流的 36V、3.5A、2.4MHz 降压型开关稳压器
LT3680EDD#TRPBF	ADI	获取价格	LT3680 - 36V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75µA Quiescent Curr
LT3680EDD-PBF	Linear	获取价格	36V, 3.5A, 2.4MHz Step-Down Switching Regulat

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