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PDF NCV8669 Data sheet ( Hoja de datos )
| Número de pieza | NCV8669 | |
| Descripción | 150mA LDO Regulator | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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NCV8669
Very Low Iq 150 mA LDO
Regulator with Reset and
Early Warning
The NCV8669 is 150 mA LDO regulator with integrated reset and
early warning functions dedicated for microprocessor applications. Its
robustness allows NCV8669 to be used in severe automotive
environments. The NCV8669 utilizes precise 1 MW internal resistor
divider for Early Warning function which significantly reduces overall
application quiescent current and number of external components.
Very low quiescent current as low as 42 mA typical for NCV8669
makes it suitable for applications permanently connected to battery
requiring very low quiescent current with or without load. The
NCV8669 contains protection functions as current limit and thermal
shutdown.
http://onsemi.com
14
1
SO−14
D SUFFIX
CASE 751A
MARKING
DIAGRAM
14
V8669yzxxG
AWLYWW
1
Features
• Output Voltage Options: 5 V
• Output Voltage Accuracy: ±2 %
• Output Current up to 150 mA
• Very Low Quiescent Current: Typ 42 mA (Including Internal Early
Warning Resistor Divider Current)
• Very Low Dropout Voltage
• Early Warning Threshold Accuracy: $10% Over Temperature
y = Timing and Reset Threshold Option*
z = Early Warning Option*
xx = Voltage Option
5.0 V (xx = 50)
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
*See APPLICATION INFORMATION section.
Range (Using RSI_ext External Resistor with $1% 100 ppm/°C)
• Microprocessor Compatible Control Functions:
♦ Reset with Adjustable Power−on Delay
♦ Early Warning
ORDERING INFORMATION
See detailed ordering and shipping information in the
dimensions section on page 13 of this data sheet.
• Wide input voltage operation range: up to 40 V
• Protection Features:
♦ Current Limitation
♦ Thermal Shutdown
Typical Applications
• Body Control Module
• Instruments and Clusters
• These are Pb−Free Devices
• Occupant Protection and Comfort
• Powertrain
VBAT
Cin
0.1 mF
*
RSI_ext
*RSI_ext is optional
** z is 1, 2, 3, ... , n
Vout
Vin Vout
VDD
Cout
SI 2.2 mF
NCV8669yz**
DT
SO
RO
Microprocessor
I/O
RESET
GND
Figure 1. Application Circuit
© Semiconductor Components Industries, LLC, 2011
July, 2011 − Rev. 1
1
Publication Order Number:
NCV8669/D
1 page  
NCV8669
ELECTRICAL CHARACTERISTICS Vin = 13.2 V, VDT = GND, RSI_ext not used, Cin = 0.1 mF, Cout = 2.2 mF, for typical values TJ =
25°C, for min/max values TJ = −40°C to 150°C; unless otherwise noted. (Notes 9 and 10)
Parameter
Test Conditions
Symbol Min Typ Max Unit
RESET OUTPUT RO
Reset Output Low Voltage
Reset Output High Voltage
Vout > 1 V, IRO < 200 mA
VROL
VROH
− 0.15 0.25
4.5 −
−
V
V
Integrated Reset Pull Up Resistor
RRO
kW
15 30 50
Reset Delay Time (Note 14)
Reset Reaction Time (see Figure 24)
EARLY WARNING (SI and SO)
DT connected to GND
DT connected to Vout
tRD ms
12.8 16 19.2
25.6 32 38.4
tRR 16 25 38 ms
Early Warning Input Voltage Threshold
(Preset EW Threshold Values)
NCV8669y2
High
Low
RSI1 = 480 kW, RSI2 = 520 kW
(internal resistor divider values, see )
RSI_ext = 150 kW (±1%, ±100 ppm/°C)
(external resistor value, see Figure 22)
Vin_EW(th)
5.67 6.30 6.92
5.30 5.89 6.47
V
Integrated Sense Output Pull Up Resistor
RSO
kW
15 30 50
Sense Output Low Voltage
Sense Output High Voltage
Vin < Vin_EW(th)_Low_Min, ISO < 200 mA, Vout > 1 V
VSOL
VSOH
− 0.15 0.25
4.5 −
−
V
V
Maximum Sense Output Sink Current
THERMAL SHUTDOWN
VSO = 0.25 V
Vin < Vin_EW(th)_Low_Min
Vout = 4.5 V
ISOmax
1.75
−
mA
−
Thermal Shutdown Temperature (Note 12)
TSD 150 175 195 °C
Thermal Shutdown Hysteresis (Note 12)
TSH − 25 − °C
9. Refer to ABSOLUTE MAXIMUM RATINGS and APPLICATION INFORMATION for Safe Operating Area.
10. 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.
11. Measured when output voltage falls 100 mV below the regulated voltage at Vin = 13.2 V.
12. Values based on design and/or characterization.
13. Iq for Preset EW Threshold Options is measured when RSI_ext is not used. For typical values of Iq vs RSI_ext see Figure 23.
14. See APPLICATION INFORMATION section for Reset Thresholds and Reset Delay Time Options
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5
5 Page 
NCV8669
Dropout Voltage
The input to output differential at which the regulator
output no longer maintains regulation against further
reductions in input voltage. It is measured when the output
drops 100 mV below its nominal value. The junction
temperature, load current, and minimum input supply
requirements affect the dropout level.
Quiescent Current
Quiescent Current (Iq) is the difference between the input
current (measured through the LDO input pin) and the
output load current.
Current Limit and Short Circuit Current Limit
Current Limit is value of output current by which output
voltage drops below 96% of its nominal value. It means that
the device is capable to supply minimum 200 mA without
sending Reset signal to microprocessor.
Short Circuit Current Limit is output current value
measured with output of the regulator shorted to ground.
PSRR
Power Supply Rejection Ratio is defined as ratio of output
voltage and input voltage ripple. It is measured in decibels
(dB).
Line Transient Response
Typical output voltage overshoot and undershoot
response when the input voltage is excited with a given
slope.
Load Transient Response
Typical output voltage overshoot and undershoot
response when the output current is excited with a given
slope between low−load and high−load conditions.
Thermal Protection
Internal thermal shutdown circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded. When activated at typically 175°C,
the regulator turns off. This feature is provided to prevent
failures from accidental overheating.
Maximum Package Power Dissipation
The power dissipation level is maximum allowed power
dissipation for particular package or power dissipation at
which the junction temperature reaches its maximum
operating value, whichever is lower.
APPLICATIONS INFORMATION
The NCV8669 regulator is self−protected with internal
thermal shutdown and internal current limit. Typical
characteristics are shown in Figures 4 to 25.
Input Decoupling (Cin)
A ceramic or tantalum 0.1 mF capacitor is recommended
and should be connected close to the NCV8669 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 must be used 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 NCV8669 is a stable component and does not require
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 2.2 mF and can be augmented to fulfill
stringent load transient requirements. The regulator works
with ceramic chip capacitors as well as tantalum devices.
Larger values improve noise rejection and load transient
response.
Reset Delay Time Select
Selection of the NCV8669yz devices and the state of the
DT pin determines the available Reset Delay times. The part
is designed for use with DT tied to ground or OUT, but may
be controlled by any logic signal which provides a threshold
between 0.8 V and 2 V. The default condition for an open DT
pin is the faster Reset time (DT = GND condition). Times are
in pairs and are highlighted in the table below. Consult
factory for availability. The Delay Time select (DT) pin is
logic level controlled and provides Reset Delay time per the
table. Note the DT pin is sampled only when RO is low, and
changes to the DT pin when RO is high will not effect the
reset delay time.
Reset Operation
A reset signal is provided on the Reset Output (RO) pin to
provide feedback to the microprocessor of an out of
regulation condition. The timing diagram of reset function
is shown in Figure 24. This is in the form of a logic signal on
RO. Output voltage conditions below the RESET threshold
cause RO to go low. The RO integrity is maintained down
to Vout = 1.0 V. The Reset Output (RO) circuitry includes
internal pull−up connected to the output (Vout) No external
pull−up is necessary.
RESET DELAY AND RESET THRESHOLD OPTIONS
Part Number
DT = GND
Reset
Time
DT = Vout
Reset
Time
Reset
Threshold
NCV86695z
16 ms
32 ms
93%
NOTE:
The timing values can be selected from following list: 8,
16, 32, 64, and 128 ms. The reset threshold values can
be selected from following list: 90% and 93%. Contact
factory for other timing and reset thresholds
combinations not included in the table.
http://onsemi.com
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NCV8669.PDF ] | |
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