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PDF NCV8502 Data sheet ( Hoja de datos )
| Número de pieza | NCV8502 | |
| Descripción | Micropower 150 mA LDO Linear Regulators | |
| Fabricantes | ON | |
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NCV8502 Series
Micropower 150 mA LDO
Linear Regulators with
DELAY, Adjustable RESET,
and Monitor FLAG
The NCV8502 is a family of precision micropower voltage
regulators. Their output current capability is 150 mA. The family has
output voltage options for adjustable, 2.5 V, 3.3 V, 5.0 V, 8.0 V, and 10 V.
The output voltage is accurate within ±2.0% with a maximum
dropout voltage of 0.6 V at 150 mA. Low quiescent current is a feature
drawing only 90 mA with a 100 mA load. This part is ideal for any and
all battery operated microprocessor equipment.
Microprocessor control logic includes an active RESET (with
DELAY), and a FLAG monitor which can be used to provide an early
warning signal to the microprocessor of a potential impending RESET
signal. The use of the FLAG monitor allows the microprocessor to
finish any signal processing before the RESET shuts the
microprocessor down.
The active RESET circuit operates correctly at an output voltage as
low as 1.0 V. The RESET function is activated during the power up
sequence or during normal operation if the output voltage drops
outside the regulation limits.
The reset threshold voltage can be decreased by the connection of
external resistor divider to RADJ lead.
The regulator is protected against reverse battery, short circuit, and
thermal overload conditions. The device can withstand load dump
transients making it suitable for use in automotive environments. The
device has also been optimized for EMC conditions.
Features
• Output Voltage Options: Adjustable, 2.5 V, 3.3 V, 5.0 V, 8.0 V, 10 V
• ±2.0% Output
• Low 90 mA Quiescent Current
• Fixed or Adjustable Output Voltage
• Active RESET
• Adjustable Reset
• 150 mA Output Current Capability
• Fault Protection
♦ +60 V Peak Transient Voltage
♦ −15 V Reverse Voltage
♦ Short Circuit
♦ Thermal Overload
• Early Warning through FLAG/MON Leads
• NCV Prefix for Automotive and Other Applications Requiring Site
and Change Control
• AEC Qualified
• PPAP Capable
• These are Pb−Free Devices
http://onsemi.com
8
1
16
1
SO−8
D SUFFIX
CASE 751
SOIC 16 LEAD
WIDE BODY
EXPOSED PAD
PDW SUFFIX
CASE 751AG
MARKING DIAGRAMS
SO−8
8
8502x
ALYW
G
1
SOW−16
16 E PAD
8502x
AWLYYWWG
1
x = Voltage Ratings as Indicated Below:
A = Adjustable
2 = 2.5 V
3 = 3.3 V
5 = 5.0 V
8 = 8.0 V
0 = 10 V
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Device
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2008
October, 2008 − Rev. 31
1
Publication Order Number:
NCV8502/D
1 page  
NCV8502 Series
PACKAGE PIN DESCRIPTION, ADJUSTABLE OUTPUT
Package Pin Number
SO−8
1
2
3, 4
SOW−16
E PAD
7
8
3−6, 9−12,
14, 15
Pin Symbol
VIN
MON
NC
Input Voltage.
Function
Monitor. Input for early warning comparator. If not needed connect to VOUT.
No connection.
5
13
GND
Ground. All GND leads must be connected to Ground.
6
16
FLAG
Open collector output from early warning comparator.
7
1
VADJ
Voltage Adjust. A resistor divider from VOUT to this lead sets the output voltage.
8
2
VOUT
±2.0%, 150 mA output.
PACKAGE PIN DESCRIPTION, FIXED OUTPUT
Package Pin Number
SO−8
1
2
3
4
SOW−16
E PAD
7
8
9
10
Pin Symbol
VIN
MON
RADJ
DELAY
Input Voltage.
Function
Monitor. Input for early warning comparator. If not needed connect to VOUT.
Reset Adjust. If not needed connect to ground.
Timing capacitor for RESET function.
5
13
GND
Ground. All GND leads must be connected to Ground.
6
16
RESET
Active reset (accurate to VOUT ≥ 1.0 V)
7
1
FLAG
Open collector output from early warning comparator.
8
2
VOUT
±2.0%, 150 mA output.
− 3−6, 11, 12, NC No connection.
14, 15
http://onsemi.com
5
5 Page 
NCV8502 Series
CALCULATING POWER DISSIPATION IN A
SINGLE OUTPUT LINEAR REGULATOR
The maximum power dissipation for a single output
regulator (Figure 19) is:
PD(max) + [VIN(max) * VOUT(min)] IOUT(max)
) VIN(max)IQ
(eq. 1)
where:
VIN(max) is the maximum input voltage,
VOUT(min) is the minimum output voltage,
IOUT(max) is the maximum output current for the
application, and
IQ is the quiescent current the regulator consumes at
IOUT(max).
Once the value of PD(max) is known, the maximum
permissible value of RqJA can be calculated:
RQJA
+
150C *
PD
TA
(eq. 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.
IIN
VIN
SMART
REGULATOR®
} Control
Features
IQ
IOUT
VOUT
Figure 19. Single Output Regulator with Key
Performance Parameters Labeled
100
90
80
70
60
50
40 0 200 400 600 800
Copper Area (mm2)
Figure 20. 16 Lead SOW (Exposed Pad), qJA as a
Function of the Pad Copper Area (2 oz. Cu
Thickness), Board Material = 0.0625, G−10/R−4
HEAT SINKS
A heat sink 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
(eq. 3)
where:
RqJC = the junction−to−case thermal resistance,
RqCS = the case−to−heatsink thermal resistance, and
RqSA = 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 heat sink data sheets
of heat sink manufacturers.
http://onsemi.com
11
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NCV8502.PDF ] | |
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