© Semiconductor Components Industries, LLC, 2011
March, 2011 − Rev. 3
1 Publication Order Number:
NCV8508B/D
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
• I
OUT
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
Figure 1. Application Circuit
C1*
V
OUT
GND
V
IN
WDI
NCV8508B
1.0 mF
I/O
I/O
RESET
RESET
0.1 mF
C2
Microprocessor
Delay
R
Delay
60 k
V
BAT
*C1 required if regulator is located far from power supply filter.
V
DD
WAKEUP
MRA4004T3
See detailed ordering and shipping information in the package
dimensions section on page 20 of this data sheet.
ORDERING INFORMATION
MARKING
DIAGRAMS
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 @ R
Delay
= 60k)
2 (Delay Time = 9 ms @ R
Delay
= 60k)
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G =Pb−Free Package
http://onsemi.com
D
2
PAK−7
DS SUFFIX
CASE 936AB
508yBx
ALYW
G
1
8
SO−8 EP
PD SUFFIX
CASE 751AC
1
8
V8508yBxx
AWLYWWG
1
