ncv8508b ON Semiconductor, ncv8508b Datasheet - Page 2

• Manufacturer Part Number: ncv8508b
• Description: Ncv8508b 5.0 V, 250 Ma Ldo With Watchdog And Reset
• Manufacturer: ON Semiconductor

PACKAGE PIN DESCRIPTION
PACKAGE PIN
RESET
SO−8 EP
Delay
EPAD
WDI
V
#
4
5
6
2
7
8
1
3
IN
PIN SYMBOL
−
+
Wakeup
RESET
Sense
EPAD
Delay
V
GND
WDI
V
OUT
IN
11 V
Reference
Bandgap
Regulated output voltage ± 3.0%.
Supply Voltage to the IC.
CMOS compatible input lead. The Watchdog function monitors the falling edge of the incoming
signal.
Ground connection.
CMOS compatible output consisting of a continuously generated signal used to “wake up” the
microprocessor from sleep mode.
CMOS compatible output lead RESET goes low whenever V
nominal, or during the absence of a correct Watchdog signal.
Buffered bandgap voltage used to create timing current for RESET and Wakeup from R
Kelvin connection which allows remote sensing of the output voltage for improved regulation.
Connect to V
Connect to Ground potential or leave unconnected.
Charge
Pump
−
+
OUT
1.25 V
Figure 2. Block Diagram
Timing
Circuit
if remote sensing is not required.
http://onsemi.com
+
−
2
Falling
Detect
Edge
FUNCTION
Watchdog
Current
Shutdown
Limit
Circuit
Thermal
connected
on 7 lead
Internally
D
OUT
2
Wakeup
PAK
Circuit
drops by more than 7.0% from
V
Sense
Wakeup
OUT
Delay.