NCV8881 PDF даташит
Спецификация NCV8881 изготовлена «ON Semiconductor» и имеет функцию, называемую «1.5A Automotive Buck Regulator». |
|
Детали детали
Номер произв | NCV8881 |
Описание | 1.5A Automotive Buck Regulator |
Производители | ON Semiconductor |
логотип |
30 Pages
No Preview Available ! |
NCV8881
1.5A Automotive Buck
Regulator with Watchdog
The NCV8881 consists of a Buck switching regulator (SMPS) with
a combination SMPS output undervoltage monitor and CPU watchdog
circuit. In addition, two fixed−voltage low dropout regulator outputs
are provided, and share an LDO output voltage status output. Once
enabled, regulator operation continues until the Watchdog signal is no
longer present. The NCV8881 is intended for Automotive,
battery−connected applications that must withstand a 40 V load dump.
The switching regulator is capable of converting the typical 9 V to
19 V automotive input voltage range to outputs from 3.3 V to 8 V at a
constant switching frequency, which can be resistor programmed or
synchronized to an external clock signal. Enable input threshold and
hysteresis are programmable, with the enable input state replicated at
an open drain Ignition Buffer output. The regulators are protected by
current limiting, input overvoltage and overtemperature shutdown, as
well as SMPS short circuit shutdown.
Features
• 1.5 A Switching Regulator (internal power switch)
• 100 mA, 5 V LDO Output
• 40 mA, 8.5 V LDO Output
• Operating Range 5 V to 19 V
• Programmable SMPS Frequency
• SMPS can be Synchronized to an External Clock
• Programmable SMPS Output Voltage Down to 0.8 V
• $2% Reference Voltage Tolerance
• Internal SMPS Soft−Start
• Voltage−mode SMPS Control
• SMPS Cycle−by−Cycle Current Limit and Short−Circuit Protection
• Internal Bootstrap Diode
• Logic level Enable Input
• Enable Input Hysteresis Programmable by External Resistor Divider
• Enable Input State is Replicated at an Open Drain Output
• CPU Watchdog with Resistor Programmable Delays
• Watchdog Reset Output also Indicates SMPS Output Out of Regulation
• Battery Input Withstands Load Dump to 40 V
• Low Standby Current
• Thermal Shutdown (TSD)
• NCV Prefix for Automotive and Other Applications Requiring Site
and Change Controls
• These are Pb−Free Devices
http://onsemi.com
MARKING
DIAGRAMS
16
16
1
SO−16W EP
PW SUFFIX
CASE 751AG
NCV8881
AWLYYWWG
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
IGNBUF 1
WDI
RDLY
RESB
EN
SYNC
ROSC
GND
16
5P0
LDOMON
8P5
VIN
SW
BST
FB
COMP
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 32 of this data sheet.
Applications
• Audio
• Infotainment
• Safety – Vision Systems
• Instrumentation
© Semiconductor Components Industries, LLC, 2011
January, 2011 − Rev. 1
1
Publication Order Number:
NCV8881/D
No Preview Available ! |
NCV8881
IGNITION
BUFFER
RIGBUF
IGNBUF
FROM CPU
WATCHDOG OUT
WDI
5P0
LDOMON
RMON
REGULATED
5.0V
CS5P0
LDO
MONITOR
RDLY
RDLY
TO CPU
RESET
RRESB
RESB
ENABLE R1
R2
SYNC
EN
SYNC
ROSC
ROSC
GND
8P5
BEAD
C8P5
VIN
CIN
SW
BST
CBST
REGULATED
8.5V
CS8P5
BATTERY
REGULATED
SMPS OUTPUT
L1
DFW
CZ1
COUT
RP2 RFB1
FB
COMP
CP1
RZ1
CP3
RFB2
Figure 1. Typical Application
IGNITION
BUFFER
RIGBUF
IGNBUF
1
BUFFERED
ENABLE
WATCHDOG
INPUT
WDI
2
RDLY
3
RDLY
CPU
RESET
RRESB RESB
4
QIB
WATCHDOG
TIMER
ENABLE
R1
R2
QRB
EN
5
CLAMP
RH
QH
SYNC
ROSC
SYNC
6
ROSC
7
GND
8
OSCILLATOR
LOGIC
NOPULSE
TSD
FAULT(H)
VIN_OV
/UVLO
ENABLE
HYSTERESIS
TEMP
SENSE
DBST2
5V
REGULATOR
QLM
MONITOR
DBST1
8.5V
REGULATOR
POWER
SWITCH
5P0
16
LDOMON
15
RMON
CS5
S+5
LDO
MONITOR
8P5
14
C8P5
BEAD
CS8P5
S+8.5
VIN
13
BATTERY
CIN
SW
12
CBST
L1
BST
11
DFW
SWITCHER
OUT
COUT
SW_UV
OC
RUN
PWM
COMPARATOR
NCV8881
UNDERVOLTAGE
MONITOR
SHORT CKT
MONITOR
ERROR
AMP
FB
10
REF
CP1
RZ1
COMP
9
CZ1
RP2
CP3
RFB1
RFB2
Figure 2. NCV8881 Detailed Block Diagram
http://onsemi.com
2
No Preview Available ! |
NCV8881
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Min/Max Voltage on WDI
−0.3 to 7
V
Min/Max Voltage on RDLY
−0.3 to 7
V
Min/Max Voltage on RESB
−0.3 to 7
V
Min/Max Voltage on EN
−0.3 to 10
V
Max EN Current
10 mA
Min EN Current (with zero VIN voltage)
−10 mA
Min/Max Voltage on SYNC
−0.3 to 7
V
Min/Max Voltage on ROSC
−0.3 to 7
V
Min/Max Voltage COMP
−0.3 to 7
V
Min/Max Voltage FB
−0.3 to 7
V
Min Voltage SW
– DC
− 20 ns
−0.7
−3
V
Max Voltage VIN to SW
40 V
Max Voltage VIN
40 V
Min/Max Voltage BST
−0.3 to 30
V
Min/Max Voltage BST to SW
−0.3 to 15
V
Min/Max Voltage on 8P5
−0.3 to 9.5
V
Max 8P5 Current
70 mA
Min/Max Voltage on LDOMON
−0.3 to 7
V
Min/Max Voltage on 5P0
−0.3 to 7
V
Min/Max Voltage IGNBUF
−0.3 to 7
V
Storage Temperature range
Operating Junction Temperature Range
ESD withstand Voltage Human Body Model
Machine Model
Charged Device Model
TJ
VESD
−55 to +150
−40 to + 150
2.0
200
>1.0
°C
°C
kV
V
kV
Moisture Sensitivity
MSL
Level 1
Peak Reflow Soldering Temperature
260 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
THERMAL CHARACTERISTICS
Board/Mounting Conditions Typical Value
Parameter
Minimum Pad (Note 1)
1 sq. inch (Note 2)
Unit
Junction−to−case top (YJT, qJT)
30 16 °C/W
Junction−to−pin 1(YJL1, qJL1)
70 65 °C/W
Junction−to−board (YJB, qJB) (Note 3)
15 17 °C/W
Junction−to−ambient (RqJA, qJA)
150 55 °C/W
Specific Notes on Thermal Characterization Conditions:
NOTE: All boards are 0.062” thick FR4, 3” square, with varying amounts of copper heat spreader, in still air (free convection) conditions.
Numerical values are derived from an axisymmetric finite−element model where active die area, total die area, flag area, pad area,
and board area are equated to the actual corresponding areas.
1. 1 oz. copper, 17.2 mm2 spreader area (minimum exposed pad, not including traces which are assumed).
2. 1 oz. copper, 645 mm2 (1 in2) spreader area (includes exposed pad).
3. “Board” is defined as center of exposed pad soldered to board; this is the recommended number to be used for thermal calculations, as it
best represents the primary heat flow path and is least sensitive to board and ambient properties.
http://onsemi.com
3
Скачать PDF:
[ NCV8881.PDF Даташит ]
Номер в каталоге | Описание | Производители |
NCV8881 | 1.5A Automotive Buck Regulator | ON Semiconductor |
Номер в каталоге | Описание | Производители |
TL431 | 100 мА, регулируемый прецизионный шунтирующий регулятор |
Unisonic Technologies |
IRF840 | 8 А, 500 В, N-канальный МОП-транзистор |
Vishay |
LM317 | Линейный стабилизатор напряжения, 1,5 А |
STMicroelectronics |
DataSheet26.com | 2020 | Контакты | Поиск |