Datasheet > LTC4419CDD

LTC4419CDD

更新时间： 2024-11-14 01:07:39

品牌	Logo	应用领域
Linear Systems		/
页数	文件大小	规格书
20页	739K
描述
18V Dual Input Micropower PowerPath Prioritizer

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中文翻译

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LTC4419CDD 数据手册

LTC4419

18V Dual Input Micropower

PowerPath Prioritizer

FeaTures

DescripTion

Selects Highest Priority Valid Supply from Two Inputs The LTC^®4419 is a dual input monolithic PowerPath™

Wide 1.8V to 18V Operating Range

prioritizerwithlowoperatingcurrent,thatprovidesbackup

switchoverforkeepingcriticalcircuitryaliveduringbrown

out and power loss conditions. Unlike diode-OR products,

little current is drawn from the inactive supply even if its

voltage is greater than the active supply.

Internal Dual 2Ω, 0.5A Switches

Low 3.6µA Operating Current

Low 320nA V2 Current When V1 Connected to OUT

Blocks Reverse and Cross Conduction Currents

Reverse Supply Protection to –15V

Internal2Ω,currentlimitedPMOSswitchesprovidepower

path selection from a primary input (V1) or a backup input

(V2) to the output. An adjustable voltage monitor set via

an external resistive divider provides flexibility in setting

theV1toV2switchoverthreshold. WhenprimaryinputV1

drops, the ADJ monitor input causes OUT to be switched

toV2. Fastnon-overlapswitchovercircuitrypreventsboth

reverse and cross conduction while minimizing output

droop.

V2 Freshness Seal/Ship Mode

1.ꢀ5 Accurate Adjustable Switchover Threshold

Two Auxiliary 2.ꢁ5 Accurate Voltage Comparators

Overcurrent and Thermal Protection

Thermally Enhanced 10-Pin ꢁmm × ꢁmm DFN

and 12-Lead Exposed Pad MSOP Packages

applicaTions

Low Power Battery Backup

The LTC4419 has two auxiliary comparators with open-

drainoutputsthatprovideflexiblevoltagemonitoring. The

V2ON output indicates if V2 is powering OUT. Freshness

seal mode prevents V2 battery discharge during storage

or shipment.

Portable Equipment

Point-of-Sale (POS) Equipment

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

PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks

are the property of their respective owners.

Typical applicaTion

Typical Switchover Waveforms

WALL

OUT

CMPOUT1

CMPOUT2

OUT

ADAPTER

10µF

ADJ

V1UV

V2UV

237k

121k

2V/DIV

CMP1

2V/DIV

LTC4419

OUT

SWITCHOVER

THRESHOLD

LOAD

= 10µF

= 100mA

OUT

V2ON

7.4V

Li-Ion

SWITCHOVER

4.02M

280k

4419 TA01b

THRESHOLD: V1 < 4V (V1 FALLING)

V1UV THRESHOLD: V1 < 4.4V (V1 FALLING)

V2UV THRESHOLD: V2 < 6V (V2 FALLING)

50µs/DIV

CMP2

GND

4419 TA01a

4419f

For more information www.linear.com/LTC4419

12 3 4 5 6 7...20

中文翻译

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与LTC4419CDD相关器件

型号	品牌	获取价格	描述	数据表
LTC4419CMSE	Linear Systems	获取价格	18V Dual Input Micropower PowerPath Prioritizer
LTC4419IDD	Linear Systems	获取价格	18V Dual Input Micropower PowerPath Prioritizer
LTC4420	ADI	获取价格	具后备电源监视功能的 18V、双路输入微功率 PowerPath 优先级排序器
LTC4420CDD	Linear Systems	获取价格	18V Dual Input Micropower PowerPath Prioritizer with Backup Supply Monitoring
LTC4420IMSE	Linear Systems	获取价格	18V Dual Input Micropower PowerPath Prioritizer with Backup Supply Monitoring
LTC4421	ADI	获取价格	大功率优先化PowerPath控制器
LTC4425	Linear Systems	获取价格	2-Cell Supercapacitor Charger with Backup
LTC4425	Linear	获取价格	Linear SuperCap Charger with Current-Limited Ideal Diode and V/I Monitor
LTC4425	ADI	获取价格	具电流限制理想二极管和电压 / 电流 (V/I) 监视器的线性超级电容器充电器
LTC4425EDD	Linear	获取价格	Linear SuperCap Charger with Current-Limited Ideal Diode and V/I Monitor

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