Datasheet > LTC3672B-1

LTC3672B-1

更新时间： 2023-12-20 18:45:11

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
12页	172K
描述
采用 2mm x 2mm DFN 封装、具双路 150mA LDO 的单片式固定输出 400mA 降压型稳压器

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中文翻译

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LTC3672B-1 数据手册

LTC3672B-1

Monolithic Fixed-Output

400mA Buck Regulator with Dual

150mA LDOs in 2mm × 2mm DFN

FEATURES

DESCRIPTION

The LTC^®3672B-1 is a triple power supply composed of a

400mA synchronous buck regulator and two 150mA low-

dropout linear regulators (LDOs), where one of the LDOs

canbepoweredfromthebuckoutputtoimproveefﬁciency.

Constant-frequency 2.25MHz operation is maintained

down to very light loads. The input supply range of 2.9V

to5.5Visespeciallywell-suitedforsingle-cellLithium-Ion

and Lithium-Polymer applications, and for powering low

voltage ASICs from 3.3V or 5V rails.

■

Triple Output Supply From a Single 2.9V to 5.5V Input

Buck DC/DC: Fixed 1.8V Output, Up to 400mA

LDO1: Fixed 1.2V Output, Up to 150mA

LDO2: Fixed 2.8V Output, Up to 150mA

2.5ꢀ ꢁeference Accuracy

■

Constant Frequency 2.25MHz Operation

Minimum External Component Count

Current Mode Operation for Excellent Line and Load

Transient Response

■

Internal Soft-Start for Each Output

The LTC3672B-1 regulates 1.8V at the buck output, 1.2V

at the LDO1 output, and 2.8V at the LDO2 output. Exter-

nal component count is minimal—all that is needed is a

single inductor, an input capacitor, and output capacitors

for each of the three outputs. Control loop compensation

is internal to the LTC3672B-1.

Single Enable Pin Turns On/Shuts Down All Three

Outputs

■

Tiny 2mm × 2mm × 0.75mm DFN Package

APPLICATIONS

■

DMB Cellphones

The LTC3672B-1 is available in a 2mm × 2mm × 0.75mm

8-Lead DFN package.

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

■

Handheld Products (PDA, PMP, GPS)

■

Multivoltage Power for Digital Logic, I/O, FPGAs,

CPLDs, ASICs, CPUs, and RF Chipsets

TYPICAL APPLICATION

Buck DC/DC Efﬁciency vs Load

100

2.9V TO 5.5V

= 2.9V

4.7MH

= 3.6V

OUT1

2.2MF

1.8V

400mA

(250mA IF LDO1

FULLY-LOADED)

10MF

= 5.5V

GND

BUCKOUT

IN1

1.2V

150mA

OUT2

LDO1

ENABLE

INPUT

ENALL

1MF

LTC3672B-1

2.8V

OUT3

LDO2

UP TO 150mA

(SUBJECT TO DROPOUT

LIMITATIONS)

50 100 150 200 250 300 350 400

(mA)

3672b1 TA01

LOAD

3672b1 TA01b

3672B1f

12 3 4 5 6 7...12

中文翻译

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与LTC3672B-1相关器件

型号	品牌	获取价格	描述	数据表
LTC3672B-2	Linear	获取价格	Monolithic Fixed-Output 400mA Buck Regulator
LTC3672B-2	ADI	获取价格	采用 2mm x 2mm DFN 封装、具双路 150mA LDO 的单片式固定输出 40
LTC3672BEDC-1-PBF	Linear	获取价格	Monolithic Fixed-Output 400mA Buck Regulator
LTC3672BEDC-1-TRPBF	Linear	获取价格	Monolithic Fixed-Output 400mA Buck Regulator
LTC3672BEDC-2#TRPBF	Linear	获取价格	LTC3672B-2 - Monolithic Fixed-Output 400mA Buck Regulator with Dual 150mA LDOs in 2mm x 2m
LTC3672BEDC-2-PBF	Linear	获取价格	Monolithic Fixed-Output 400mA Buck Regulator
LTC3672BEDC-2-TRPBF	Linear	获取价格	Monolithic Fixed-Output 400mA Buck Regulator
LTC3675	Linear	获取价格	7-Channel Confi gurable High Power PMIC
LTC3675	Linear Systems	获取价格	7-Channel Confi gurable High Power PMIC
LTC3675	ADI	获取价格	7 通道、可配置高功率 PMIC

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