ncv8881 ON Semiconductor, ncv8881 Datasheet - Page 2

• Manufacturer Part Number: ncv8881
• Description: Ncv8881 1.5a Automotive Buck Regulator With Watchdog
• Manufacturer: ON Semiconductor

IGNITION
BUFFER
WATCHDOG
INPUT
CPU
RESET
ENABLE
SYNC
ROSC
RRESB
R1
R2
RIGBUF
RDLY
IGNBUF
RESB
SYNC
ROSC
RDLY
GND
WDI
EN
1
2
3
4
5
6
7
8
BUFFERED
CLAMP
ENABLE
IGNITION
BUFFER
FROM CPU
WATCHDOG OUT
TO CPU
RESET
ENABLE
SYNC
QIB
QRB
WATCHDOG
OSCILLATOR
TIMER
QH
RIGBUF
ROSC
RDLY
R1
RRESB
RH
R2
Figure 2. NCV8881 Detailed Block Diagram
IGNBUF
WDI
RDLY
RESB
EN
SYNC
ROSC
GND
FAULT(H)
HYSTERESIS
NOPULSE
ENABLE
LOGIC
Figure 1. Typical Application
SW_UV
VIN_OV
/UVLO
RUN
TSD
http://onsemi.com
OC
COMPARATOR
NCV8881
PWM
TEMP
SENSE
2
LDOMON
COMP
BST
5P0
8P5
REGULATOR
VIN
SW
FB
5V
CIN
DBST2
UNDERVOLTAGE
SHORT CKT
MONITOR
MONITOR
CBST
BEAD
C8P5
MONITOR
RMON
RZ1
CP1
ERROR
AMP
DFW
DBST1
REGULATOR
8.5V
POWER
SWITCH
L1
RP2
CZ1
QLM
CP3
REGULATED
5.0V
LDO
MONITOR
REGULATED
SMPS OUTPUT
REGULATED
8.5V
REF
BATTERY
RFB1
RFB2
CS5P0
CS8P5
16
15
14
13
12
11
10
9
SW
LDOMON
5P0
8P5
VIN
BST
FB
COMP
COUT
RZ1
C8P5
CP1
CBST
DFW
RMON
BEAD
CP3
L1
CS8P5
RP2
CZ1
CS5
CIN
SWITCHER
BATTERY
MONITOR
RFB1
RFB2
S+8.5
COUT
S+5
LDO
OUT