ncv8881 ON Semiconductor, ncv8881 Datasheet - Page 20
ncv8881
Manufacturer Part Number
ncv8881
Description
Ncv8881 1.5a Automotive Buck Regulator With Watchdog
Manufacturer
ON Semiconductor
Datasheet
1.NCV8881.pdf
(33 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ncv8881PWR2G
Manufacturer:
ON Semiconductor
Quantity:
800
Part Number:
ncv8881PWR2G
Manufacturer:
ON/安森美
Quantity:
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ENABLE (EN PIN)
maintain a standby mode which keeps the switching
regulator, Watchdog Circuit, and LDO outputs off, and
minimizes supply current. In this state the RESB output is
low. A high logic level at the EN input activates all functions.
Upon EN exceeding V
established, followed by soft−start of the switching
OUTPUT
OUTPUT
ENABLE
ENABLE
After VIN rises above V
SMPS
SMPS
8P5
5P0
8P5
5P0
VIN
VIN
8P5 Regulation Monitor Threshold
5P0 Regulation Monitor Threshold
8P5 Regulation Monitor Threshold
5P0 Regulation Monitor Threshold
0
0
1
1
ENSTHH
STRT
2
2
Figure 43. Enable High Time Long Enough to be Latched
, 5P0 and 8P5 voltages are
, EN below V
Figure 42. Enable High Time Insufficient to be Latched
3
3
ENSTHL
4
4
http://onsemi.com
will
5
5
20
regulator. Once either the 5P0 or 8P5 LDO reaches
regulation, EN dropping below V
the SS Timer expires. Thereafter, if the SMPS output voltage
is out of regulation, or WDI pulse period exceeds the
Watchdog Delay time t
part in standby mode.
6
6
7
7
8
8
WD
, EN below V
9
9
ENSTHL
10
10
has no effect until
ENSTHL
11
11
puts the
12
12