Datasheet > NCV47821_17

NCV47821_17

更新时间： 2024-11-24 01:14:39

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
15页	181K
描述
Adjustable Dual LDO with Adjustable Current Limit and Diagnostic Features

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中文翻译

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数据手册

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NCV47821_17 数据手册

NCV47821

3.3 V to 20 V Adjustable Dual

LDO with Adjustable Current

Limit and Diagnostic Features

The NCV47821 dual channel LDO regulator with 200 mA per

channel is designed for use in harsh automotive environments. The

device has a high peak input voltage tolerance and reverse input voltage,

reverse bias, overcurrent and overtemperature protections. The

integrated current sense feature (adjustable by resistor connected to

CSO pin for each channel) provides diagnosis and system protection

functionality. The CSO pin output current creates voltage drop across

CSO resistor which is proportional to output current of each channel.

Extended diagnostic features in OFF state are also available and

controlled by dedicated input and output pins.

www.onsemi.com

MARKING

DIAGRAM

NCV4

7821

ALYWG

TSSOP−14

Exposed Pad

CASE 948AW

Features

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

• Adjustable Outputs: 3.3 V to 20 V 3% Output Voltage

• Output Current per Channel: up to 200 mA

• Two Independent Enable Inputs (3.3 V Logic Compatible)

• Adjustable Current Limits: up to 300 mA

(Note: Microdot may be in either location)

• Protection Features:

♦ Current Limitation

♦ Thermal Shutdown

♦ Reverse Input Voltage and Reverse Bias Voltage

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 14 of this data sheet.

• Diagnostic Features:

♦ Short To Battery (STB) and Open Load (OL) in OFF State

♦ Internal Components for OFF State Diagnostics

♦ Open Collector Flag Output

• AEC−Q100 Grade 1 Qualified and PPAP Capable

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

Typical Applications

• Audio and Infotainment System

• Active Safety System

V_out1

V_in

C_in

R₁₁

C_b1*

1 μF

C_out1

ADJ1

CSO1

10 μF

EN1

To A /D

C_CSO1

R_CSO1

R₁₂

NCV47821

(Dual LDO)

1 μF

Diagnostic Enable Input

Error Flag Output (Open Collector)

Diagnostic Channel Select Input

V_out2

R₂₁

C_b2*

C_out2

ADJ2

CSO2

EN2

10 μF

To A /D

C_CSO2

R_CSO2

R₂₂

GND

1 μF

C_b1* and C_b2* are optional for stability with ceramic output capacitors

Figure 1. Application Schematic

(See Application Section for More Details)

Publication Order Number:

January, 2017 − Rev. 2

NCV47821/D

12 3 4 5 6 7...15

中文翻译

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NCV4949A_17	ONSEMI	获取价格	Low Dropout Voltage Regulator
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NCV4949ADWR2G	ONSEMI	获取价格	Low Dropout Voltage Regulator
NCV4949APDR2G	ONSEMI	获取价格	Low Dropout Voltage Regulator
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