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PDF NCV8503 Data sheet ( Hoja de datos )
| Número de pieza | NCV8503 | |
| Descripción | Micropower 400 mA LDO Linear Regulators | |
| Fabricantes | ON Semiconductor | |
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NCV8503 Series
Micropower 400 mA LDO
Linear Regulators
with ENABLE, DELAY,
Adjustable RESET, and
General Use Comparator
The NCV8503 is a family of precision micropower voltage
regulators. Their output current capability is 400 mA. The family has
output voltage options for Adjustable, 2.5 V, 3.3 V and 5.0 V.
The output voltage is accurate within ± 2.0% with a maximum
dropout voltage of 0.6 V at 400 mA. Low quiescent current is a feature
drawing less than 1.0 mA with ENABLE = 0 V. With ENABLE = 5.0 V,
the part only draws 200 mA with 100 mA load. This part is ideal for any
and all battery operated microprocessor equipment.
Microprocessor control logic includes an active RESET (with
DELAY).
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 below
the regulation limits.
The reset threshold voltage can be decreased by the connection of
external resistor divider to RADJ lead.
The general use comparator (FLAG/Monitor) is referenced to a
temperature stable voltage and provides 1.0 mA of drive current at its
open collector output.
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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
• ± 2.0% Output
• Low < 1.0 mA Sleep Current
• Low 200 mA Quiescent Current
• Fixed or Adjustable Output Voltage
• Active RESET
• Adjustable Reset
• ENABLE
• 400 mA Output Current Capability
• Fault Protection
♦ +60 V Peak Transient Voltage
♦ −15 V Reverse Voltage
♦ Short Circuit
♦ Thermal Overload
• General Use Comparator
• NCV Prefix for Automotive and Other Applications Requiring Site
and Change Control
• Pb−Free Packages are Available
http://onsemi.com
16
1
SOIC 16 LEAD
WIDE BODY
EXPOSED PAD
PDW SUFFIX
CASE 751AG
MARKING
DIAGRAM
16
NCV8503x
AWLYYWWG
1
x = Voltage Ratings as Indicated Below:
A = Adjustable
2 = 2.5 V
3 = 3.3 V
5 = 5.0 V
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
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, 2007
February, 2007 − Rev. 19
1
Publication Order Number:
NCV8503/D
1 page  
NCV8503 Series
PACKAGE PIN DESCRIPTION, ADJUSTABLE OUTPUT
Pin Number
Pin Symbol
Function
1
2
3−6, 11, 12
VADJ
VOUT
NC
Voltage Adjust. A resistor divider from VOUT to this lead sets the output voltage.
±2.0%, 400 mA output.
No connection.
7 VIN Input Voltage.
8
MON
Monitor. Input to comparator. If not needed connect to VOUT.
9
RADJ
Reset adjust. If not needed connect to ground.
10
DELAY
Timing capacitor for RESET function.
13
GND
Ground. All GND leads must be connected to Ground.
14
ENABLE
ENABLE control for the IC. A high powers the device up.
15
RESET
Active reset (accurate to VOUT ≥ 1.0 V)
16
FLAG
Open collector output from comparator.
NOTE: Tentative pinout for SOW−16 E Pad.
PACKAGE PIN DESCRIPTION, FIXED OUTPUT
Pin Number
Pin Symbol
Function
1
2
3−6, 11, 12
SENSE
VOUT
NC
Kelvin connection which allows remote sensing of output voltage for improved regulation. If
remote sensing is not desired, connect to VOUT.
±2.0%, 400 mA output.
No connection.
7 VIN Input Voltage.
8
MON
Monitor. Input to comparator. If not needed connect to VOUT.
9
RADJ
Reset adjust. If not needed connect to ground.
10
DELAY
Timing capacitor for RESET function.
13
GND
Ground. All GND leads must be connected to Ground.
14
ENABLE
ENABLE control for the IC. A high powers the device up.
15
RESET
Active reset (accurate to VOUT ≥ 1.0 V)
16
FLAG
Open collector output from comparator.
NOTE: Tentative pinout for SOW−16 E Pad.
http://onsemi.com
5
5 Page 
NCV8503 Series
100
90
80
70
60
50
40 0 200 400 600 800
Copper Area (mm2)
Figure 22. 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
CALCULATING POWER DISSIPATION IN A
SINGLE OUTPUT LINEAR REGULATOR
The maximum power dissipation for a single output
regulator (Figure 23) is:
PD(max) + [VIN(max) * VOUT(min)] IOUT(max)
(1)
) VIN(max)IQ
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
+
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.
IIN
VIN
SMART
REGULATOR®
} Control
Features
IQ
IOUT
VOUT
Figure 23. Single Output Regulator with Key
Performance Parameters Labeled
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
(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 13 Páginas | |
| PDF Descargar | [ Datasheet NCV8503.PDF ] | |
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