NCV47821 Datasheet, PDF (1/15 Pages) ON Semiconductor – 3.3 V to 20 V Adjustable Dual LDO with Adjustable Current Limit and Diagnostic Features

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.
Features
• 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
• Protection Features:
♦ Current Limitation
♦ Thermal Shutdown
♦ Reverse Input Voltage and Reverse Bias Voltage
• 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
www.onsemi.com
14
1
TSSOP−14
Exposed Pad
CASE 948AW
MARKING
DIAGRAM
14
NCV4
7821
ALYWG
G
1
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
Typical Applications
• Audio and Infotainment System
• Active Safety System
Cin
1 μF
Vin
EN1
Diagnostic Enable Input
DE
Diagnostic Channel Select Input
CS
Vout1
ADJ1
CSO1
CCSO1
NCV47821
(Dual LDO )
1 μF
EF
Vout2
EN2
GND
ADJ2
CSO2
CCSO2
1 μF
R11
To A /D
RCSO1 R12
Cb1*
Cout1
10 μF
Error Flag Output (Open Collector)
R21
To A /D
RCSO2 R22
Cb2*
Cout2
10 μF
Cb1* and Cb2* are optional for stability with ceramic output capacitors
Figure 1. Application Schematic
(See Application Section for More Details)
© Semiconductor Components Industries, LLC, 2016
1
May, 2016 − Rev. 1
Publication Order Number:
NCV47821/D