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PDF NCV47411 Data sheet ( Hoja de datos )
| Número de pieza | NCV47411 | |
| Descripción | 3.3V to 20V Adjustable Dual LDO | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCV47411
3.3 V to 20 V Adjustable
Dual LDO with Adjustable
Current Limit and 3.3 V
Logic Compatible Enable
Inputs
The NCV47411 is a dual integrated low dropout regulator with
100 mA per channel designed for use in harsh automotive
environments. It includes wide operating temperature and input
voltage ranges. The device is offered with adjustable voltage version
available in 3% output voltage accuracy. It has a high peak input
voltage tolerance and reverse input voltage protection. It also provides
overcurrent protection, overtemperature protection and enable for
control of the state of the output voltage of each channel. The
integrated current sense feature provides diagnosis and system
protection functionality. The current limit of the device is adjustable
by resistor connected to CSO pin for each channel. CSO pin output
current creates voltage drop across CSO resistor which is proportional
to output current of each channel.
Features
• Two Adjustable Outputs: (from 3.3 V to 20 V) ±3% Output Voltage
• Enable Inputs (3.3 V Logic Compatible Thresholds)
• Adjustable Current Limit up to 150 mA
• Protection Features:
♦ Current Limitation
♦ Thermal Shutdown
♦ Reverse Input Voltage
• This is a Pb−Free Device
Typical Applications
• Audio and Infotainment System
• Instrument Cluster
• Navigation
• Satellite Radio
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14
1
MARKING
DIAGRAM
14
TSSOP−14 EP
CASE 948AW
1
NCV4
7411
ALYWG
G
NCV47411 = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
1
Vin
CSO1
EN1
GND
EN2
CSO2
Vin
Top View
EPAD
14
Vout1
ADJ1
NC
NC
NC
ADJ2
Vout2
ORDERING INFORMATION
See detailed ordering and shipping information on page 12 of
this data sheet.
© Semiconductor Components Industries, LLC, 2013
December, 2013 − Rev. 1
1
Publication Order Number:
NCV47411/D
1 page  
NCV47411
Table 7. ELECTRICAL CHARACTERISTICS
Vin = 13.5 V, VEN1,2 = 3.3 V, RCSO1,2 = 0 W, CCSO1,2 = 1 mF, Cin = 1 mF, Cout1,2 = 10 mF, ESR = 1.5 W. Min and Max values are valid for
temperature range −40°C ≤ TJ ≤ +150°C unless noted otherwise and are guaranteed by test, design or statistical correlation. Typical
values are referenced to TJ = 25°C (Note 7)
Parameter
Test Conditions
Symbol
Min Typ Max Unit
REGULATOR OUTPUTS
Output Voltage (Accuracy %)
(Note 8)
Vin = Vin_min to 40 V
Iout1,2 = 5 mA to 100 mA
Line Regulation
(Note 8)
Vin = Vin_min to (Vout_nom1,2 + 20 V)
Iout1,2 = 5 mA
Load Regulation
Vin = (Vout_nom1,2 + 8.5 V)
Iout1,2 = 5 mA to 100 mA
Dropout Voltage
(Note 9)
Vout_nom1,2 = 5 V, Iout1,2 = 100 mA
VDO1,2 = Vin − Vout1,2
DISABLE AND QUIESCENT CURRENTS
Vout1,2
Regline1,2
Regload1,2
VDO1,2
−3 − +3 %
− 0.05 1.0 %
− 0.05 1.4 %
− 250 550 mV
Disable Current
Quiescent Current,
Iq = Iin − (Iout1 + Iout2)
Quiescent Current,
Iq = Iin − (Iout1 + Iout2)
CURRENT LIMIT PROTECTION
VEN1,2 = 0 V
Iout1,2 = 500 mA,
Vin = (Vout_nom1,2 + 8.5 V)
Iout1,2 = 100 mA,
Vin = (Vout_nom1,2 + 8.5 V)
IDIS − 0.07 10 mA
Iq
−
235 370
mA
Iq − 15 50 mA
Current Limit
PSRR & NOISE
Vout1,2 = 0.9 x Vout_nom1,2
Vin = (Vout_nom1,2 + 8.5 V)
ILIM1,2
150 −
− mA
Power Supply Ripple Rejection
Output Noise Voltage
ENABLE
f = 100 Hz, 0.5 Vp−p1,2
f = 10 Hz to 100 kHz, Cb1,2 = 10 nF
PSRR1,2
Vn1,2
− 75 − dB
− 130 − mVrms
Enable Input Threshold Voltage
Logic Low (OFF)
Logic High (ON)
Enable Input Current
Turn On Time
from Enable ON to 90% of Vout
OUTPUT CURRENT SENSE
Vout1,2 ≤ 0.1 V
Vout1,2 ≥ 0.9 x Vout_nom1,2
VEN1,2 = 3.3 V
Iout1,2 = 100 mA, Cb1,2 = 10 nF,
Rn1 = 82 kW, Rn2 = 27 kW
Vth(EN1,2)
IEN1,2
ton
0.99 1.8
−
− 1.9 2.31
V
2 9 20 mA
ms
− 1.6 −
CSO Voltage Level at Current Limit
CSO Transient Voltage Level
Vout1,2 = 0.9 x Vout_nom1,2,
(Vout_nom1,2 = 5 V)
RCSO1,2 = 2.55 kW
CCSO1,2 = 4.7 mF, RCSO1,2 = 2.55 kW
Iout1,2 pulse from 10 mA to 100 mA,
tr = 1 ms
VCSO_Ilim1.2 2.346 2.55 2.754
(−8 %)
(+8 %)
V
VCSO1,2
− − 3.3 V
Output Current to CSO Current Ratio VCSO1,2 = 2 V, Iout1,2 = 10 mA to 100 mA
(Note 10)
(Vout_nom1,2 = 5 V)
Iout1,2/ICSO1,2
−
50
−
(−10 %)
(+10 %)
−
CSO Current at no Load Current
THERMAL SHUTDOWN
VCSO1,2 = 0 V, Iout1,2 = 0 mA,
(Vout_nom1,2 = 5 V)
ICSO_off1,2
−
− 10 mA
Thermal Shutdown Temperature
Iout1,2 = 2.5 mA
TSD1,2
150 − 195 °C
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.
7. 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.
8. Minimum input voltage Vin_min is 4.4 V or (Vout_nom1,2 + 1 V) whichever is higher
9. Measured when the output voltage Vout1,2 has dropped by 2% of Vout1,2 from the nominal value obtained at Vin = Vout_nom1,2 + 8.5 V.
10. Not guaranteed in dropout.
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5
5 Page 
NCV47411
Setting the Output Voltage
The output voltage range can be set between 3.3 V and
20 V. This is accomplished with an external resistor divider
feeding back the voltage to the IC back to the error amplifier
by the voltage adjust pin ADJ1,2. The internal reference
voltage is set to a temperature stable reference (VREF1) of
1.275 V. The output voltage is calculated from the following
formula. Ignoring the bias current into the ADJ1,2 pin:
ǒ ǓVout_nom_n + VREF1
1
)
Rn1
Rn2
(eq. 2)
Use Rn2 < 50 kW to avoid significant voltage output errors
due to ADJ1,2 bias current.
Designers should consider the tolerance of Rn1 and Rn2
during the design phase.
Setting the Output Current Limit
The output current limit can be set between 10 mA and
150 mA by external resistor RCSO1,2 (see Figure 1).
Capacitor CCSO1,2 of 1 mF in parallel with RCSO1,2 is
required for stability of current limit control circuitry (see
Figure 1).
ǒVCSO1,2 + Iout1,2 RCSO1,2
1Ǔ
50
(eq. 3)
ILIM1,2
+
50
1
2.55
RCSO1,2
(eq. 4)
RCSO1,2
+
50
1
2.55
ILIM1,2
(eq. 5)
where:
RCSO1,2− current limit setting resistor
VCSO1,2− voltage at CSO pin proportional to Iout1,2
ILIM1,2 − current limit value
Iout1,2 − output current actual value
CSO1,2 pin provides information about output current
actual value. The CSO1,2 voltage is proportional to output
current according to Equation 3.
Once output current reaches its limit value (ILIM1,2) set by
external resistor RCSO1,2 than voltage at CSO1,2 pin is
typically 2.55 V. Calculations of ILIM1,2 or RCSO1,2 values
can be done using equations Equations 4 and 5, respectively.
Designers should consider the tolerance of RCSO1,2
during the design phase.
Thermal Considerations
As power in the NCV47411 increases, it might become
necessary to provide some thermal relief. The maximum
power dissipation supported by the device is dependent
upon board design and layout. Mounting pad configuration
on the PCB, the board material, and the ambient temperature
affect the rate of junction temperature rise for the part. When
the NCV47411 has good thermal conductivity through the
PCB, the junction temperature will be relatively low with
high power applications. The maximum dissipation the
NCV47411 can handle is given by:
PD(MAX)
+
[TJ(MAX) *
RqJA
TA]
(eq. 6)
Since TJ is not recommended to exceed 150°C, then the
NCV47411 soldered on 645 mm2, 1 oz copper area, FR4 can
dissipate up to 2.4 W (single layer PCB) when the ambient
temperature (TA) is 25°C. See Figure 18 for RqJA versus
PCB area. The power dissipated by the NCV47411 can be
calculated from the following equations:
ǒ ǓPD [ Vin Iq@Iout1,2 ) Iout1ǒVin * Vout1Ǔ ) Iout2ǒVin * Vout2Ǔ
(eq. 7)
or
Vin(MAX)
[
PD(MAX)
)
ǒVout1
Iout1
)
Iout1Ǔ ) ǒVout2
Iout2 ) Iq
Iout2Ǔ
(eq. 8)
120
110
100
1 oz, Single Layer
90
80
70
60 2 oz, Single Layer
50
40
1 oz, 4 Layer
30
20 2 oz, 4 Layer
0 100 200 300 400 500 600 700
COPPER HEAT SPREADER AREA (mm2)
Figure 18. Thermal Resistance vs. PCB
Copper Area
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NCV47411.PDF ] | |
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