NCV8668
Very Low I
q
150 mA LDO
Regulator with Window
Watchdog, Enable and
Reset
The NCV8668 is 150 mA LDO regulator with integrated window
watchdog and reset functions dedicated for microprocessor
applications. Its robustness allows NCV8668 to be used in severe
automotive environments. Very low quiescent current as low as 38
mA
typical makes it suitable for applications permanently connected to
battery requiring very low quiescent current with or without load. The
Enable function can be used for further decrease of quiescent current
down to 1
mA.
The NCV8668 contains protection functions as current limit and
thermal shutdown.
Features
http://onsemi.com
MARKING
DIAGRAMS
14
1
SOIC−14
CASE 751A
1
14
V8668ZZXXG
AWLYWW
8
1
SOIC−8
D SUFFIX
CASE 751A
8
668ZZX
ALYW
G
•
•
•
•
•
•
•
Output Voltage Options: 3.3 V and 5 V
Output Voltage Accuracy:
$1.5%
(T
J
= 25°C to 125°C)
Output Current up to 150 mA
Very Low Quiescent Current: Typ 38
mA
(max 43
mA)
Very Low Dropout Voltage
Enable Function
Microprocessor Compatible Control Functions:
♦
Reset with Adjustable Power−on Delay
♦
Window Watchdog
•
Wide Input Voltage Operation Range: up to 40 V
•
Protection Features:
♦
Current Limitation
♦
Reverse Output Current
♦
Thermal Shutdown
•
These are Pb−Free Devices
Typical Applications
1
8
8
1
SOIC−8 EP
CASE 751AC
ZZ
1
668ZZX
AYWWG
G
•
•
•
•
Body Control Module
Instruments and Clusters
Occupant Protection and Comfort
Powertrain
V
BAT
V
in
C
in
0.1
mF
V
out
V
out
C
out
2.2
mF
V
DD
= Timing, Reset Threshold,
Watchdog Control Options*
XX,X
= Voltage Options
= 5 V (XX = 50, X = 5)
= 3.3 V (XX = 33, X = 3)
A
= Assembly Location
WL, L = Wafer Lot
YY, Y
= Year
WW, W = Work Week
G or
G
= Pb−Free Package
*See APPLICATION INFORMATION Section.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
NCV8668
RO
WDI
Microprocessor
RESET
I/O
I/O
I/O
OFF ON
EN
GND
WM1
WM2
Figure 1. Application Schematic
©
Semiconductor Components Industries, LLC, 2010
October, 2010
−
Rev. 2
1
Publication Order Number:
NCV8668/D
NCV8668
V
in
V
out
*
Driver with
Current
Limit
Thermal
Shutdown
V
ref
RESET
GENERATOR
and
WINDOW
WATCHDOG
RO
WDI
WM1
WM2
EN
GND
Enable
* 5 V OPTION ONLY
Figure 2. Simplified Block Diagram
RO
GND
GND
GND
GND
WM 2
WM 1
1
14
EN
Vin
GND
GND
GND
Vout
WDI
1
RO
GND
WM 2
WM 1
SOIC−8
8
EN
Vin
Vout
WDI
1
RO
GND
WM 2
WM 1
SOIC−8 EP
8
EN
Vin
Vout
WDI
SOIC−14
Figure 3. Pin Connections
(Top View)
PIN FUNCTION DESCRIPTION
Pin No.
SOIC−14
1
Pin No.
SOIC−8
1
Pin No.
SOIC−8 EP
1
Pin
Name
RO
Description
Reset Output. 30 kW internal Pull−Up resistor connected to V
out
. (Open Drain
output for 2.5 V, 2.6 V, and 3.3 V voltage options) RO goes Low when V
out
drops by more than 7% from nominal.
Power Supply Ground.
For SOIC−14
−
connect pin 2 and 3 to GND
−
connect pin 4−5 and 10−12 to heatsink area with GND potential
Watchdog Mode Bit 2; Watchdog and Reset mode selection. Connect to V
out
or GND.
Watchdog Mode Bit 1; Watchdog and Reset mode selection. Connect to V
out
or GND.
Watchdog Input; Trigger Input for Watchdog pulses. When not used, connect
to V
out
or GND.
Regulated Output Voltage. Connect 2.2
mF
capacitor with ESR < 100
W
to
ground.
Positive Power Supply Input. Connect 0.1
mF
capacitor to ground.
Enable Input; low level disables the IC.
Exposed Pad is Connected to Ground
2, 3, 4, 5, 10,
11, 12
2
2
GND
6
7
8
9
13
14
3
4
5
6
7
8
3
4
5
6
7
8
EPAD
WM2
WM1
WDI
V
out
V
in
EN
GND
http://onsemi.com
2
NCV8668
ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage (Note 1)
DC
Transient, t < 100 ms
Input Current
Output Voltage (Note 2)
Output Current
Enable Input Voltage Range
DC
Transient, t < 100 ms
Enable Input Current Range
Reset Output Voltage (Note 3)
Reset Output Current
Watchdog Input Voltage
Watchdog Mode 1 Voltage
Watchdog Mode 1 Current
Watchdog Mode 2 Voltage
Watchdog Mode 2 Current
Junction Temperature
Storage Temperature
Symbol
V
in
Min
−0.3
−
−5
−0.3
−3
−0.3
−
−1
−0.3
−3
−0.3
−0.3
−5
−0.3
−5
−40
−55
Max
40
45
−
5.5
Current Limited
40
45
1
5.5
3
5.5
5.5
5
5.5
5
150
150
Unit
V
I
in
V
out
I
out
V
EN
mA
V
mA
V
I
EN
V
RO
I
RO
V
WDI
V
WM1
I
WM1
V
WM2
I
WM2
T
J
TSTG
mA
V
mA
V
V
mA
V
mA
°C
°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.
1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
2. The Output voltage must not exceed the Input voltage.
3. The Reset Output voltage must not exceed the Output voltage.
ESD CAPABILITY
(Note 4)
Rating
ESD Capability, Human Body Model
ESD Capability, Machine Model
Symbol
ESD
HBM
ESD
MM
Min
−2
−200
Max
2
200
Unit
kV
V
4. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (JS−001−2010)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
LEAD SOLDERING TEMPERATURE AND MSL
(Note 5)
Rating
Lead Temperature Soldering
Reflow (SMD Styles Only), Pb−Free Versions (Note 5)
Moisture Sensitivity Level
(SOIC−14, SOIC−8)
(SOIC−8EP)
Symbol
T
SLD
MSL
Min
−
1
2
Max
265 peak
Unit
°C
−
5. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D
http://onsemi.com
3
NCV8668
THERMAL CHARACTERISTICS
(Note 6)
Rating
Thermal Characteristics, SOIC−14 (Note 6)
Thermal Resistance, Junction−to−Air (Note 7)
Thermal Reference, Junction−to−Lead4 (Note 7)
Thermal Characteristics, SOIC−8 (Note 6)
Thermal Resistance, Junction−to−Air (Note 7)
Thermal Reference, Junction−to−Lead4 (Note 7)
Thermal Characteristics, SOIC−8 EP (Note 6)
Thermal Resistance, Junction−to−Air (Note 7)
Thermal Reference, Junction−to−Lead4 (Note 7)
Thermal Reference, Junction−to−Pad (Note 7)
Symbol
R
qJA
R
YJL
R
qJA
R
YJL
R
qJA
R
YJL4
R
YJPad
Value
95
18.2
132
49.2
80
28.5
14.8
Unit
°C/W
°C/W
°C/W
6. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
7. Values based on copper area of 645 mm
2
(or 1 in
2
) of 1 oz copper thickness and FR4 PCB substrate.
RECOMMENDED OPERATING RANGES
(Note 8)
Rating
Input Voltage (Note 9)
Junction Temperature
Symbol
V
in
T
J
Min
4.5
−40
Max
40
150
Unit
V
°C
8. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
9. Minimum V
in
= 4.5 V or (V
out
+ V
DO
), whichever is higher.
ELECTRICAL CHARACTERISTICS
V
in
= 13.2 V, C
in
= 0.1
mF,
C
out
= 2.2
mF,
for typical values T
J
= 25°C, for min/max values T
J
=
−40°C
to 150°C; unless otherwise noted.
(Notes 10 and 11)
Parameter
REGULATOR OUTPUT
Output Voltage (Accuracy %)
3.3 V
5.0 V
Output Voltage (Accuracy %)
3.3 V
5.0 V
T
J
= 25°C to 125°C
V
in
= 4.5 V to 16 V, I
out
= 0.1 mA to 100 mA
V
in
= 5.5 V to 16 V, I
out
= 0.1 mA to 100 mA
V
out
3.2505
4.925
(−1.5%)
3.234
3.234
4.9
4.9
(−2%)
3.234
4.9
(−2%)
−20
3.3
5.0
3.3495
5.075
(+1.5%)
3.366
3.366
5.1
5.1
(+2%)
3.366
5.1
(+2%)
20
V
Test Conditions
Symbol
Min
Typ
Max
Unit
V
in
= 4.5 V to 40 V, I
out
= 0.1 mA to 100 mA
V
in
= 4.5 V to 16 V, I
out
= 0.1 mA to 150 mA
V
in
= 5.55 V to 40 V, I
out
= 0.1 mA to 100 mA
V
in
= 5.7 V to 16 V, I
out
= 0.1 mA to 150 mA
T
J
=
−40°C
to 125°C
V
in
= 4.5 V to 28 V, I
out
= 0 mA
V
in
= 5.5 V to 28 V, I
out
= 0 mA
V
out
3.3
3.3
5.0
5.0
V
Output Voltage (Accuracy %)
3.3 V
5.0 V
Line Regulation
5.0 V
3.3 V
Load Regulation
Dropout Voltage (Note 12)
5.0 V
Output Capacitor for Stability (Note 13)
V
out
3.3
5.0
0
V
V
in
= 5.5 V to 28 V, I
out
= 5 mA
V
in
= 4.5 V to 28 V, I
out
= 5 mA
I
out
= 0.1 mA to 150 mA
I
out
= 100 mA
I
out
= 150 mA
I
out
= 5 mA to 150 mA
I
out
= 0 mA to 5 mA
Reg
line
mV
Reg
load
V
DO
−40
−
−
2.2
−
1
10
225
300
−
−
−
40
450
600
−
100
100
mV
mV
C
out
ESR
mF
W
W
10. Refer to ABSOLUTE MAXIMUM RATINGS and APPLICATION INFORMATION for Safe Operating Area.
11. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at T
A
[T
J
. Low duty
cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
12. Measured when output voltage falls 100 mV below the regulated voltage at V
in
= 13.2 V. If V
out
< 5 V, then V
DO
= V
in
– V
out
. Maximum dro-
pout voltage value is limited by minimum input voltage V
in
= 4.5 V recommended for guaranteed operation at maximum output current.
13. Values based on design and/or characterization.
14. Recommended for typical trigger time. T
WD
= t
CW
+ 1/2 * t
OW
http://onsemi.com
4
NCV8668
ELECTRICAL CHARACTERISTICS
V
in
= 13.2 V, C
in
= 0.1
mF,
C
out
= 2.2
mF,
for typical values T
J
= 25°C, for min/max values T
J
=
−40°C
to 150°C; unless otherwise noted.
(Notes 10 and 11)
Parameter
Disable and Quiescent Current
Disable Current
Quiescent Current (I
q
= I
in
– I
out
)
V
EN
= 0 V,T
J
< 85°C
I
out
= 100
mA,
T
J
= 25°C
I
out
= 100
mA,
T
J
v
125°C
V
out
= 0.96 x V
out_nom
V
out
= 0 V
V
EN
= 0 V, I
out
=
−1
mA
I
DIS
I
q
−
−
−
−
38
−
1
43
44
mA
mA
Test Conditions
Symbol
Min
Typ
Max
Unit
Current Limit Protection
Current Limit
Short Circuit Current Limit
Reverse Output Current Protection
Reverse Output Current Protection
PSRR
Power Supply Ripple Rejection (Note 13) f = 100 Hz, 0.5V
pp
Enable Thresholds
Enable Input Threshold Voltage
Logic High
Logic Low
Enable Input Current
Logic High
Logic Low
Window Watchdog
Watchdog Mode Bit 1 Threshold Voltage
Voltage Increasing, Logic High
3.3 V
5.0 V
Voltage Decreasing, Logic Low
Watchdog Mode Bit 2 Threshold Voltage
Voltage Increasing, Logic High
3.3 V
5.0 V
Voltage Decreasing, Logic Low
Watchdog Input WDI Threshold Voltage
Voltage Increasing, Logic High
3.3 V
5.0 V
Voltage Decreasing, Logic Low
Watchdog Input WDI Current
Logic High
Logic Low
Watchdog Sampling Time
Ignore Window Time
Open Window Time
Closed Window Time
V
WDI,H
= 5 V
V
WDI,L
= 0 V, T
J
< 85
°C
Fast:
Slow:
Fast:
Slow:
Fast:
Slow:
Fast:
Slow:
WM2 = L
WM1 = L AND WM2 = H
WM2 = L
WM1 = L AND WM2 = H
WM2 = L
WM1 = L AND WM2 = H
WM2 = L
WM1 = L AND WM2 = H
V
WM1,H
V
WM1,L
V
WM2,H
V
WM2,L
V
WDI,H
V
WDI,L
I
WDI,H
I
WDI,L
t
sam
t
IW
t
OW
t
CW
V
−
−
0.8
−
−
−
2.65
4.0
−
V
−
−
0.8
−
−
−
2.65
4.0
−
V
−
−
0.8
−
−
0.4
0.8
25.6
51.2
25.6
51.2
25.6
51.2
−
−
−
3
0.5
0.5
1.0
32.0
64.0
32.0
64.0
32.0
64.0
2.65
4.0
−
4
1
0.6
1.2
38.4
76.8
38.4
76.8
38.4
76.8
mA
V
EN
= 5 V
V
EN
= 0 V, T
J
< 85°C
V
th(EN)
3
−
−
−
−
−
3
0.5
−
0.8
5
1
V
PSRR
−
60
−
dB
V
out_rev
−
2
5.5
V
I
LIM
I
SC
205
205
−
−
525
525
mA
mA
I
EN_ON
I
EN_OFF
mA
ms
ms
ms
ms
10. Refer to ABSOLUTE MAXIMUM RATINGS and APPLICATION INFORMATION for Safe Operating Area.
11. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at T
A
[T
J
. Low duty
cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
12. Measured when output voltage falls 100 mV below the regulated voltage at V
in
= 13.2 V. If V
out
< 5 V, then V
DO
= V
in
– V
out
. Maximum dro-
pout voltage value is limited by minimum input voltage V
in
= 4.5 V recommended for guaranteed operation at maximum output current.
13. Values based on design and/or characterization.
14. Recommended for typical trigger time. T
WD
= t
CW
+ 1/2 * t
OW
http://onsemi.com
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
