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PDF NCV4275C Data sheet ( Hoja de datos )
| Número de pieza | NCV4275C | |
| Descripción | 450mA Low Drop Voltage Regulator | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCV4275C
450 mA Low-Drop Voltage
Regulator with Reset
The NCV4275C is an integrated low dropout regulator designed
for use in harsh automotive environments. It includes wide
operating temperature and input voltage ranges. The output is
regulated at 5.0 V or 3.3 V and is rated to 450 mA of output current.
It also provides a number of features, including overcurrent
protection, overtemperature protection and a programmable
microprocessor reset. The NCV4275C is available in the DPAK and
D2PAK surface mount packages. The output is stable over a wide
output capacitance and ESR range. The NCV4275C is pin for pin
compatible with NCV4275A.
Features
• 5.0 V or 3.3 V ±2% Output Voltage Options
• 450 mA Output Current
• Very Low Current Consumption
• Active Reset Output
• Reset Low Down to VQ = 1.0 V
• 500 mV (max) Dropout Voltage
• Fault Protection
♦ +45 V Peak Transient Voltage
♦ −42 V Reverse Voltage
♦ Short Circuit Protection
♦ Thermal Overload Protection
• AEC−Q100 Qualified and PPAP Capable
• These are Pb−Free Devices
Applications
• Auto Body Electronics
I
Bandgap
Reference
Thermal
Shutdown
D
Error
Amplifier
+
−
Current Limit and
Saturation Sense
Reset
Generator
Q
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MARKING
DIAGRAMS
1
5
DPAK
5−PIN
DT SUFFIX
CASE 175AA
4275CxG
ALYWW
1
1
5
D2PAK
5−PIN
DS SUFFIX
CASE 936A
NC
V4275Cx
AWLYWWG
1
x
A
WL, L
Y
WW
G
= 5 (5.0 V Output)
or 3 (3.3 V Output)
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of
sheet.
Figure 1. Block Diagram
GND
RO
© Semiconductor Components Industries, LLC, 2014
January, 2014 − Rev. 0
1
Publication Order Number:
NCV4275C/D
1 page  
NCV4275C
TYPICAL PERFORMANCE CHARACTERISTICS
5.0 V Version
10
3.3 V Version
10
1 Stable ESR Region
CQ = 22 mF
0.1
0.010
100
VQ(nom) = 5.0 V
100 200 300 400
IQ, OUTPUT CURRENT (mA)
Figure 2. Output Stability with Output
Capacitor ESR
Stable ESR Region
1
CQ = 22 mF
0.1
0.01
0
100
VQ(nom) = 3.3 V
100 200 300 400
IQ, OUTPUT CURRENT (mA)
Figure 3. Output Stability with Output
Capacitor ESR
10
1 Stable ESR Region
0.1
0.01
0
CQ = 1 mF
VQ(nom) = 5.0 V
100 200 300 400
IQ, OUTPUT CURRENT (mA)
Figure 4. Output Stability with Output
Capacitor ESR
5.10
5.08
5.05
VIN = 13.5 V,
IOUT = 200 mA
5.03
5.00
4.98
4.95
4.93
4.90−40 −20 0
VQ(nom) = 5.0 V
20 40 60 80 100 120 140 160
TJ, JUNCTION TEMPERATURE (°C)
Figure 6. Output Voltage VQ vs. Temperature TJ
10
Stable ESR Region
1
CQ = 1 mF
0.1
0
3.36
3.34
VQ(nom) = 3.3 V
100 200 300 400
IQ, OUTPUT CURRENT (mA)
Figure 5. Output Stability with Output
Capacitor ESR
VIN = 13.5 V,
IOUT = 200 mA
3.32
3.3
3.28
VQ(nom) = 3.3 V
3.26−40 −20 0 20 40 60 80 100 120 140 160
TJ, JUNCTION TEMPERATURE (°C)
Figure 7. Output Voltage VQ vs. Temperature TJ
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5
5 Page 
NCV4275C
Calculating Power Dissipation
in a Single Output Linear Regulator
The maximum power dissipation for a single output
regulator (Figure 23) is:
PD(max) + [VI(max) * VQ(min)] IQ(max)
) VI(max)Iq
(1)
where
VI(max)
voltage,
is the maximum input
VQ(min)
voltage,
is the minimum output
IQ(max)
is the maximum output
current for the application,
Iq is the quiescent current the regulator consumes
at IQ(max).
Once the value of PD(max) is known, the maximum
permissible value of RqJA can be calculated:
RqJA
+
150° C *
PD
TA
(2)
The value of RqJA can then be compared with those in the
package section of the data sheet. Those packages with
RqJA’s less than the calculated value in Equation 2 will keep
the die temperature below 150°C.
In some cases, none of the packages will be sufficient to
dissipate the heat generated by the IC, and an external
heatsink will be required.
160
140
120
100
80 DPAK 1 oz
60 DPAK 2 oz
40
0 100 200 300 400 500 600 700 800
COPPER AREA SPREADER AREA (mm2)
Figure 24. qJA vs. Copper Spreader Area,
DPAK 5−Lead
II
VI
SMART
REGULATOR®
} Control
Features
Iq
IQ
VQ
Figure 23. Single Output Regulator with Key
Performance Parameters Labeled
Heatsinks
A heatsink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and
the outside environment will have a thermal resistance.
Like series electrical resistances, these resistances are
summed to determine the value of RqJA:
RqJA + RqJC ) RqCS ) RqSA
(3)
where
RqJC is the junction−to−case thermal resistance,
RqCS is the case−to−heatsink thermal resistance,
RqSA is the heatsink−to−ambient thermal resistance.
RqJC appears in the package section of the data sheet.
Like RqJA, it too is a function of package type. RqCS and
RqSA are functions of the package type, heatsink and the
interface between them. These values appear in heatsink
data sheets of heatsink manufacturers.
Thermal, mounting, and heatsinking considerations are
discussed in the ON Semiconductor application note
AN1040/D.
140
120
100
80 D2PAK 1 oz
60
D2PAK 2 oz
40 0
100 200 300 400 500 600 700
COPPER AREA SPREADER AREA (mm2)
Figure 25. qJA vs. Copper Spreader Area,
D2PAK 5−Lead
800
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11
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| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NCV4275C.PDF ] | |
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