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PDF NCV8508B Data sheet ( Hoja de datos )
| Número de pieza | NCV8508B | |
| Descripción | 250mA LDO | |
| Fabricantes | ON Semiconductor | |
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NCV8508B
5.0 V and 3.3 V, 250 mA
LDO with Watchdog and
RESET
The NCV8508B is a precision micropower Low Dropout (LDO)
voltage regulator. The part contains many of the required features for
powering microprocessors. Its robustness makes it suitable for severe
automotive environments. In addition, the NCV8508B is ideal for use
in battery operated, microprocessor controlled equipment because of
its extremely low quiescent current.
Features
• Output Voltage: 5.0 V and 3.3 V
• ±3.0% Output Voltage
• IOUT Up to 250 mA
• Quiescent Current Independent of Load
• Micropower Compatible Control Functions:
♦ Wakeup
♦ Watchdog
♦ RESET
• Low Quiescent Current (100 mA typ)
• Protection Features:
♦ Thermal Shutdown
♦ Short Circuit
♦ 45 V Operation
• NCV Prefix for Automotive and Other Applications Requiring Site
and Change Controls
• AEC Qualified
• PPAP Capable
• These are Pb−Free Devices
MRA4004T3
VBAT
NCV8508B
C1* VIN
0.1 mF
VOUT
WDI
C2
1.0 mF
VDD
I/O
RDelay
60 k
Delay RESET
GND WAKEUP
RESET
I/O
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MARKING
DIAGRAMS
D2PAK−7
DS SUFFIX
CASE 936AB
V8508yBxx
AWLYWWG
1
8
1
SO−8 EP
PD SUFFIX
CASE 751AC
8
508yBx
ALYW
G
1
xx, x = Voltage Option
5.0 V (xx = 50, x = 5)
3.3 V (xx = 33, x = 3)
y = Timing Option
(see Page 4 for more details)
1 (Delay Time = 3 ms @ RDelay = 60k)
2 (Delay Time = 9 ms @ RDelay = 60k)
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 20 of this data sheet.
*C1 required if regulator is located far from power supply filter.
Figure 1. Application Circuit
© Semiconductor Components Industries, LLC, 2011
March, 2011 − Rev. 3
1
Publication Order Number:
NCV8508B/D
1 page  
NCV8508B
ELECTRICAL CHARACTERISTICS (−40°C ≤ TJ ≤ 125°C; 6.0 V ≤ VIN ≤ 28 V, 100 mA ≤ IOUT ≤ 150 mA, C2 = 1.0 mF, RDelay = 60 k;
unless otherwise specified.)
Characteristic
Test Conditions
Min Typ Max Unit
WAKEUP OUTPUT (VIN = 14 V, IOUT = 5.0 mA)
RESET HIGH to Wakeup Rising Delay
Time
NCV85082B
5R0D%ELWAYa=ke6u0pke,d5g0e% RESET rising edge to
RDELAY = 120 k
Wakeup Response to
Watchdog Input
50% WDI falling edge to
50% Wakeup falling edge
27
−
−
37.5 48 ms
ms
75 −
0.1 5.0 ms
Wakeup Response to RESET
Output Low
Output High
DELAY
50% RESET falling edge to
50% Wakeup falling edge
VOUT = VOUT_NOM −> 90% of VOUT_NOM
RLOAD = 10 k to VOUT, VOUT ≥ 1.0 V
RLOAD = 5.1 k to VOUT, VOUT ≥ 1.0 V
RLOAD = 10 k to GND
RLOAD = 5.1 k to GND
− 0.1 5.0
− 0.2
0.4
VOUT − 0.5 VOUT − 0.25
VOUT − 1.0 VOUT − 0.5
0.4
0.8
−
ms
V
V
Output Voltage
IDELAY = 50 mA. Note 4
− 1.25 −
3. Measured when the output voltage has dropped 100 mV from the nominal value. (see Figure 12)
4. Current drain on the Delay pin directly affects the Delay Time, Wakeup Period, and the RESET to Wakeup Delay Time.
V
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5
5 Page 
NCV8508B
Recommend Thermal Data for D2PAK−7 Package
Parameter
Test Conditions Typical Value
min−pad board (Note 5)
1”−pad board (Note 6)
Junction−to−Lead (psi−JL, YJL)
Junction−to−Ambient (RqJA, qJA)
5. 1 oz. copper, 118 mm2 copper area, 0.062” thick FR4.
6. 1 oz. copper, 626 mm2 copper area, 0.062” thick FR4.
12
84
12
48
Package construction
With and without mold compound
Various copper areas used
for heat spreading
Units
°C/W
°C/W
Active Area (red) times 2
(only showing 1/2 symmetry)
Figure 20. PCB Layout and Package Construction for Simulation
http://onsemi.com
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet NCV8508B.PDF ] | |
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