LPS6235-223ML datasheet, PDF - EEWORLD Datasheet

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LPS6235-223ML: DescriptionSWITCHING REGULATOR; Categorysemiconductor Analog mixed-signal IC; File Size3MB，32 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LPS6235-223ML Overview

SWITCHING REGULATOR

LPS6235-223ML Parametric

Parameter Name	Attribute value
state	ACTIVE
Analog IC other types	SWITCHING REGULATOR

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高压、1.2

MHz/600 kHz、

800 mA、½静态电流降压调节器

ADP2370/ADP2371

产品特性

输入电压范围：3.2

V至15 V，输出电流：800 mA

省电模式(PSM)下静态电流小于14

µA

效率：>90%

Force PWM引脚(SYNC)，600 kHz/1.2 MHz频率引脚(FSEL)

固定输出：0.8

V、1.2 V、1.5 V、1.8 V、2.5 V、3.0 V、3.3 V、

5 V和可调选项

占空比½力：100%

初始精度：

±1%

½关断电流：<1.2

µA

快速输出放电(QOD)选项

可与外部时钟同步

8引脚、0.75 mm × 3 mm × 3 mm LFCSP (QFN)封装

ADIsimPower设计工具支持

= 6V

10µF

POWER GOOD

典型应用电路

VIN

ADP2370/

ADP2371

PGND

1.2MHz

600kHz

OFF

FSEL

OUT

= 3.3V

OUT

10µF

AGND

(EXPOSED PAD)

SYNC

09531-001

应用

便携式和电池供电设备

自动抄表器(WSN)

POS设备和交易处理设备

医疗仪器

中幅平板电脑

图1.

概述

ADP2370/ADP2371均为高效率、½静态电流、800

mA降压

DC-DC½换器，采用小型8引脚、3 mm × 3 mm LFCSP

(QFN)封装。整个解决方案仅需三个小型外部元件。

降压调节器采用专有高速电流模式、恒频PWM控制方

案，具有出色的稳定性和瞬态响应。这些器件内½高效率

同步整流器结构，因而无需外部整流器。

为确保便携式应用的电池 ½ 用寿 ½ 最长，

ADP2370/

ADP2371提供变频省电模式，在½½½条件下可降½开关频

率。这些器件采用3.2

V至15 V输入电压工½，允许½用多

个碱性电池/NiMH电池、锂电池或其它标准电源为其供电。

ADP2370/ADP2371提供多种选择来设½工½频率。既可以

将这些器件与600

kHz至1.2 MHz频率的外部时钟同步，也

可以通过FSEL引脚½其强制工½在600

kHz或1.2 MHz频率。

½ 更多的考虑噪声而非效率时，可以强制

ADP2370/

ADP2371采用PWM模式(FPWM)工½。

这些器件提供电源良½输出，以指示输出电压½时½于其

标称值的92%。

ADP2371与ADP2370的唯一差别在于，ADP2371有一个额

外的集成开关电阻，其具有快速输出放电功½(QOD)，该

功½可以在器件被禁用时自动对输出放电。

为½量减少外部器件数量并提高效率，这两款器件均内½

功率开关和同步整流器。为便于½用，ADP2370/ADP2371

还包括内部½启动和内部补偿功½。

在逻辑控制的关断期间，输入与输出断开，调节器从输入

源汲取的电流小于1.2

A。其它重要特性包括：欠压闭锁，

用来防止电池深度放电；以及½启动，用来防止启动时出

现输入过流。短路保护和热过½½保护电路可以防止器件在

不利条件下受损。

ADP2370/ADP2371每个均½用一个0805电容、一个1206电

容和一个4

mm × 4 mm电感。整½解决方案尺寸极小，约

为53

，适合各种便携式应用。

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Speci cations subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

Document Feedback

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Technical Support

www.analog.com

ADI中文版数据手册是英文版数据手册的译文，敬请谅解翻译中可½存在的语言组织或翻译错误，ADI不对翻译中存在的差异或由此产生的错误负责。如需确认任½词语的准确性，请参考ADI提供

的最新英文版数据手册。

ADP2370/ADP2371

目½

产品特性

...........................................................................................1

应用....................................................................................................1

典型应用电路

..................................................................................1

概述....................................................................................................1

修订历史

...........................................................................................4

技术规格

...........................................................................................5

推荐规格：电容.........................................................................9

绝对最大额定值......................................................................

热数据

....................................................................................... 10

热阻

........................................................................................... 10

ESD警告.................................................................................... 11

引脚配½和功½描述

.................................................................. 12

典型性½参数

............................................................................... 13

降压输出...................................................................................

工½原理

........................................................................................ 25

PWM工½模式 ........................................................................ 25

PSM工½模式 .......................................................................... 26

特性描述

........................................................................................ 27

精密½½...................................................................................

强制PWM或PWM/PSM选择

............................................... 27

快速输出放电(QOD)功½

.................................................... 27

短路保护...................................................................................

欠压闭锁...................................................................................

热保护

....................................................................................... 27

½启动

....................................................................................... 27

限流

........................................................................................... 27

100%占空比 ............................................................................. 29

同步

........................................................................................... 29

电源良½...................................................................................

应用信息

........................................................................................ 31

ADIsimPower设计工具.......................................................... 31

外部元件选择

.......................................................................... 31

选择电感...................................................................................

输出电容...................................................................................

输入电容...................................................................................

可调输出电压编程

................................................................. 32

效率

........................................................................................... 33

推荐降压器外部元件.............................................................

电容选择...................................................................................

散热考虑

........................................................................................ 38

PCB布局考虑........................................................................... 39

封装和订购信息...........................................................................

外½尺寸...................................................................................

订购指南...................................................................................

修订历史

2012年11月—修订版B至修订版C

更改图6

.............................................................................................8

更改订购指南部分

...................................................................... 32

2012年8月—修订版A至修订版B

更改图62

........................................................................................ 17

更改图63、图64、图65和图66

................................................. 18

2012年5月—修订版0至修订版A

“SW至PGND和接地层”的电压范围从−0.3 V至VIN + 0.3 V

更改为−0.7

V至VIN + 0.3 V.........................................................6

更改订购指南部分

...................................................................... 32

2012年4月—修订版0：初始版

Rev. C | Page 2 of 32

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