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What is NCV47821?

This electronic component, produced by the manufacturer "ON Semiconductor", performs the same function as "3.3V to 20V Adjustable Dual LDO".


NCV47821 Datasheet PDF - ON Semiconductor

Part Number NCV47821
Description 3.3V to 20V Adjustable Dual LDO
Manufacturers ON Semiconductor 
Logo ON Semiconductor Logo 


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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
May, 2016 − Rev. 1
1
Publication Order Number:
NCV47821/D

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NCV47821 equivalent
NCV47821
Table 6. ELECTRICAL CHARACTERISTICS Vin = 13.5 V, VEN1,2 = 3.3 V, VDE = 0 V, RCSO1,2 = 0 W, CCSO1,2 = 1 mF, Cin = 1 mF,
Cout1,2 = 10 mF, Min and Max values are valid for temperature range −40°C v TJ v +150°C unless noted otherwise and are guaranteed
by test, design or statistical correlation. Typical values are referenced to TJ = 25°C (Note 8)
Parameter
Test Conditions
Symbol Min Typ Max Unit
REGULATOR OUTPUTS
Output Voltage (Accuracy %) (Note 9)
Vin = Vin_min to 40 V
Iout1,2 = 5 mA to 200 mA
Vout1,2
%
−3 − +3
Line Regulation (Note 9)
Vin = Vin_min to (Vout_nom1,2 + 20 V)
Iout1,2 = 5 mA
Regline1,2
%
0.1 1.0
Load Regulation
Vin = (Vout_nom1,2 + 8.5 V)
Iout1,2 = 5 mA to 200 mA
Regload1,2
%
0.4 1.4
Dropout Voltage (Note 10)
Vout_nom1,2 = 5 V, Iout1,2 = 200 mA
VDO1,2 = Vin − Vout1,2
VDO1,2 − 250 500 mV
DISABLE AND QUIESCENT CURRENTS
Disable Current
VEN1,2 = 0 V, Vout_nom1,2 = 5 V,
−40°C v TJ v +125°C
IDIS − 0.1 10 mA
Quiescent Current, Iq = Iin − (Iout1 +Iout2) Iout1 = Iout2 = 500 mA, Vin = (Vout_nom + 8.5 V)
Quiescent Current, Iq = Iin – (Iout1 +Iout2) Iout1 = Iout2 = 200 mA, Vin = (Vout_nom + 8.5 V)
CURRENT LIMIT PROTECTION
Iq
Iq
− 0.6 1.0 mA
− 15.5 25 mA
Current Limit
Vout1,2 = 0.9 x Vout_nom1,2
Vin = (Vout_nom1,2 + 8.5 V)
ILIM1,2
300
− mA
PSRR & NOISE
Power Supply Ripple Rejection (Note 11) f = 100 Hz, 0.5 Vp−p1,2
Output Noise Voltage (Note 11)
f = 10 Hz to 100 kHz, Cb1,2 = 10 nF
ENABLE
PSRR1,2
75
− dB
Vn1,2
− 137
mVrms
Enable Input Threshold Voltage
Logic Low (OFF)
Logic High (ON)
Vout1,2 v 0.1 V
Vout1,2 w 0.9 x Vout_nom1,2 (Vout_nom1,2 = 5 V)
Vth(EN1,2)
0.99
1.8
1.9
2.31
V
Enable Input Current
Turn On Time
from Enable ON to 90 % of Vout
VEN1,2 = 3.3 V, Vout_nom1,2 = 5 V
Iout1,2 = 100 mA, Cb1,2 = 10 nF,
Rn1 = 82 kW, Rn2 = 27 kW
IEN1,2
2
8 20 mA
ton ms
− 1.7 −
OUTPUT CURRENT SENSE
CSO Voltage Level at Current Limit
Vout1,2 = 0.9 x Vout_nom1,2,
(Vout_nom1,2 = 5 V) RCSO1,2 = 1 kW
VCSO_Ilim1,2 2.448
(−4%)
2.55
2.652
(+4%)
V
CSO Transient Voltage Level
CCSO1,2 = 4.7 mF, RCSO1,2 = 1 kW
Iout1,2 pulse from 10 mA to 300 mA, tr = 1 ms
VCSO1,2
V
− 3.3
Output Current to CSO Current Ratio
(Note 12)
VCSO1,2 = 2 V, Iout1,2 = 10 mA to 300 mA
(Vout_nom1,2 = 5 V)
Iout1,2/ − 100 −
ICSO1,2 (−5%)
(+5%)
CSO Current at no Load Current
VCSO1,2 = 0 V, Iout1,2 = 0 mA,
(Vout_nom1,2 = 5 V)
ICSO_off1,2
10 mA
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
8. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at TA [ TJ. Low duty
cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
9. Minimum input voltage Vin_min is 4.4 V or (Vout_nom1,2 + 1 V) whichever is higher. Vout_nom1,2 measured at ADJ1,2 pin due to excluding
Rn1 and Rn2 accuracy.
10. Measured when the output voltage Vout1,2 has dropped by 2% of Vout_nom1,2 from the nominal valued obtained at Vin = Vout1,2 + 8.5 V.
11. Values based on design and/or characterization.
12. Not guaranteed in dropout.
www.onsemi.com
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Part Details

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Featured Datasheets

Part NumberDescriptionMFRS
NCV47821The function is 3.3V to 20V Adjustable Dual LDO. ON SemiconductorON Semiconductor

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