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PDF NCV4263-2C Data sheet ( Hoja de datos )
| Número de pieza | NCV4263-2C | |
| Descripción | 200 mA LDO Regulator | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCV4263-2C
200 mA LDO Regulator with
Enable, Reset & Watchdog
The NCV4263−2C is a 200 mA LDO regulator with integrated reset
watchdog functions dedicated for microprocessor applications. Its
robustness allows NCV4263−2C to be used in severe automotive
environments. The Enable function can be used for decrease of
quiescent current down to max 10 mA. The NCV4263−2C contains
protection functions as current limit, thermal shutdown and reverse
output current protection. The regulator provides also Watchdog,
Reset function with adjustable Threshold and adjustable Power−on
Reset Delay Time.
Features
• Output Voltage Option: 5 V
• Output Voltage Accuracy: ±2%
• Output Current up to 200 mA
• Very Low Dropout Voltage
• Enable Function (10 mA Max Quiescent Current when Disabled)
• Microprocessor Compatible Control Functions:
− Reset with Adjustable Threshold and Adjustable Power−on Delay
− Watchdog Function
• Wide Input Voltage Operation Range: up to 40 V
• Protection Features:
− Current Limitation
− Thermal Shutdown
− Reverse Output Current
• AEC−Q100 Grade 1 Qualified and PPAP Capable
• These are Pb−Free Devices
Typical Applications
• Body Control Module
• Instruments and Clusters
• Occupant Protection and Comfort
• Powertrain
Vin
Vin Vout
Cin
100 nF NCV4263−2C
OFF
ON
RADJ
RO
EN WDI
D
GND
Cout
22 mF
RRO*
5.6 kW
VDD
Microprocessor
RESET
I/O
CD
100 nF
*−optional if Reset function is needed
Figure 1. Application Schematic
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14
1
MARKING
DIAGRAMS
SOIC−14
D SUFFIX
CASE 751A
14
NCV4263−2C50G
AWLYWWG
1
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information on page 12 of
this data sheet.
© Semiconductor Components Industries, LLC, 2014
November, 2014 − Rev. 0
1
Publication Order Number:
NCV4263−2C/D
1 page  
NCV4263−2C
ELECTRICAL CHARACTERISTICS Vin = 13.5 V, VEN = 5 V, Cin = 100 nF, Cout = 22 mF, ESR = 1.5 W, WDI = 5 V pulses,
fWDI = 1 kHz. Min and Max values are valid for temperature range *40°C v TJ v 150°C unless otherwise noted and are guaranteed by
test design or statistical correlation. Typical values are referenced to TJ = 25°C. (Notes 7 and 8)
Parameter
Test Conditions
Symbol Min Typ Max Unit
RESET OUTPUT
Reset Reaction Time
THERMAL SHUTDOWN
CD = 100 nF
tRR
0.5 1.2
4
ms
Thermal Shutdown Temperature
(Note 10)
Iout = 1 mA
TSD
150 177 195
°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. Refer to ABSOLUTE MAXIMUM RATINGS and APPLICATION INFORMATION for Safe Operating Area.
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. Measured when output voltage falls 100 mV below the regulated voltage at Vin = 13.5 V.
10. Values based on design and/or characterization.
11. See APPLICATION INFORMATION section for Reset Threshold Adjustment
12. VRT_range limits are guaranteed by VRT and Vth(RADJ) parameters.
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5
5 Page 
NCV4263−2C
APPLICATIONS INFORMATION
The NCV4263−2C regulator is self−protected with
internal thermal shutdown and internal current limit. Typical
characteristics are shown in Figures 4 to 22.
range of Output Voltage 70% ≤ Vout < VRT by external
resistor output voltage divider, see schematic on Figure 23
and specification of Reset Output.
Input Decoupling (Cin)
A ceramic or tantalum 0.1 mF capacitor is recommended
and should be connected close to the NCV4263−2C
package. Higher capacitance and lower ESR will improve
the overall line and load transient response. If extremely fast
input voltage transients are expected then appropriate input
filter is recommended to use in order to decrease rising
and/or falling edges below 50 V/ms for proper operation.
The filter can be composed of several capacitors in parallel.
Output Decoupling (Cout)
The NCV4263−2C is a stable component and requires a
minimum Equivalent Series Resistance (ESR) for the output
capacitor. Stability region of ESR versus Output Current is
shown in Figure 13. The minimum output decoupling value
is 22 mF and can be augmented to fulfill stringent load
transient requirements. Larger values improve noise
rejection and load transient response.
Enable Operation
The Enable pin will turn the regulator on or off. The
threshold limits are covered in the electrical characteristics
table in this data sheet.
Delay Timing
The Delay Timing pin is current source. Current from
Delay Timing pin charges connected capacitor. The value of
this capacitor determines the Reset Delay Time by
Equation 1 and Watchdog Trigger Time by Equation 4.
ǒ ǓtRD_des
CD +
tRD
100 nF
(eq. 1)
where:
CD
tRD_des
tRD
is capacitance of Delay capacitor
is desired Reset Delay Time
is Reset Delay Time specified in
datasheet
Reset Operation
A reset signal is provided on the Reset Output pin to
provide feedback to the microprocessor of an out of
regulation condition. The timing diagram of reset function
is shown in Figure 21. This is in the form of a logic signal on
Reset Output. Output voltage conditions below the Reset
Threshold causes Reset Output to go low. The Reset Output
integrity is maintained down to Vout = 1.0 V. The Reset
Output circuitry is open collector output with internal 30 kW
pull−up resistor. Leave open this output if the Reset function
is not needed else an external pull−up resistor (5.6 kW)
connect to the output (Vout).
Reset Threshold is default set to 93% of nominal Output
Voltage (VRADJ = 0 V). Reset Threshold can be varied in
Vin
Cin
Vout
100 nF
NCV4263−2C
OFF ON
RADJ
EN RO
WDI
D
GND
Cout
22 mF
VDD
RRADJ1
RRADJ2
RRO
5.6 kW
Microprocessor
RESET
I/O
CD
100 nF
Figure 23. Application Schematic with Adjustable
Reset Threshold
Desired Reset Threshold is given by Equation 2.
ǒ ǓVRT_des +
RRADJ1 ) RRADJ2
RRADJ2
Vth(RADJ) (eq. 2)
where:
VRT_des
is desired Reset Threshold
RRADJ1, RRADJ2 are resistance of resistor divider
Vth(RADJ)
is Reset Adjust Threshold specified in
datasheet
Use RRADJ2 ≤ 50 kW to avoid significant Reset Threshold
error due to RADJ bias current.
Watchdog Operation
Watchdog Input monitors a signal from microprocessor.
This input is positive edge sensitive. The timing diagram of
watchdog function is shown in Figure 22. When watchdog
signal is not received during Watchdog Trigger Time, Reset
Output goes low for a Watchdog Input Low Time and is
periodically generated with period given by Equation 3.
Capacitance of Delay capacitor for setting the desired
Watchdog Trigger Time is given by Equation 4.
tWP + tWL ) tWTT
(eq. 3)
ǒ ǓCD +
tWTT_des
tWTT
100 nF
(eq. 4)
where:
CD
tWTT_des
tWTT
tWL
tWP
is capacitance of Delay capacitor
is desired Watchdog Trigger Time
is Watchdog Trigger Time specified in
datasheet
is Watchdog Input Low Time
is Watchdog Input Period
Thermal Considerations
As power in the NCV4263−2C increases, it might become
necessary to provide some thermal relief. The maximum
power dissipation supported by the device is dependent
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| PDF Descargar | [ Datasheet NCV4263-2C.PDF ] | |
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