NCV8667
150 mA LDO Regulator with
Enable, Reset and Early
Warning
The NCV8667 is 150 mA LDO regulator with integrated enable,
reset and early warning functions dedicated for microprocessor
applications. Its robustness allows NCV8667 to be used in severe
automotive environments. The NCV8667 utilizes precise 1 MW
internal resistor divider for Early Warning function which
significantly reduces overall application quiescent current and number
of external components. Very low quiescent current as low as 28
mA
(Adjustable Early Warning Thresholds) or 42
mA
(Preset Early
Warning Thresholds) typical for NCV8667 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
NCV8667 contains protection functions as current limit, thermal
shutdown and reverse output current protection.
Features
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MARKING
DIAGRAMS
8
8
1
SO−8
D SUFFIX
CASE 751
1
14
14
1
SO−14
D SUFFIX
CASE 751A
1
V8667YZXXG
AWLYWWG
667YZX
ALYWX
G
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Output Voltage Options: 5 V
Output Voltage Accuracy:
$2%
Output Current up to 150 mA
Very Low Quiescent Current:
−
typ 28
mA
for Adjustable Early Warning Threshold Option
−
typ 42
mA
for Preset Early Warning Threshold Option
Very Low Dropout Voltage
Early Warning Threshold Accuracy:
±10%
Over Temperature Range
(using R
SI_ext
external resistor with
±1%,
100 ppm/°C)
Enable Function (1
mA
Max Quiescent Current when Disabled)
Microprocessor Compatible Control Functions:
−
Reset with Adjustable Power−on Delay
−
Early Warning
Wide Input Voltage Operation Range: up to 40 V
Protection Features:
−
Current Limitation
−
Thermal Shutdown
−
Reverse Output Current
These are Pb−Free Devices
Body Control Module
Instruments and Clusters
Occupant Protection and Comfort
Powertrain
= Timing and Reset Threshold Option*
= Early Warning Option*
= Voltage Option
5.0 V (XX = 50, X = 5)
A
= Assembly Location
WL, L = Wafer Lot
Y
= Year
WW, W = Work Week
G or
G
= Pb−Free Package
*See Application Information Section.
(Note: Microdot may be in either location)
Y
Z
XX, X
ORDERING INFORMATION
See detailed ordering and shipping information in the
dimensions section on page 18 of this data sheet.
Typical Applications
©
Semiconductor Components Industries, LLC, 2011
May, 2011
−
Rev. 2
1
Publication Order Number:
NCV8667/D
NCV8667
V
BAT
V
in
SI
R
SI_ext
NCV8667yz**
DT
SO
OFF
ON
V
out
C
out
2.2
mF
V
DD
C
in
0.1
mF
Microprocessor
I/O
RESET
EN
GND
RO
*R
ST_ext
is optional
** z is 1, 2, 3,
…,
n
Figure 1. Application Circuit (Preset Early Warning Thresholds)
V
BAT
C
in
0.1
mF
R
SI2
R
SI1
V
in
SI
V
out
C
out
2.2
mF
V
DD
NCV8667y0
DT
SO
Microprocessor
I/O
RESET
OFF
ON
EN
GND
RO
Figure 2. Application Circuit (Adjustable Early Warning Thresholds)
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2
NCV8667
Vin
**
Driver with
Current
Limit
R
SI1
Thermal
Shutdown
V
ref
RO
TIMING
CIRCUIT
and
RESET
OUTPUT
DRIVER
and
SENSE
OUTPUT
DRIVER
SO
**
Vout
R
SI2
EN
SI
Enable
V ref
GND
DT
*
*Pull−down Resistor (~150 kW) active only in Reset State.
** 5 V option only.
Figure 3. Simplified Block Diagram of NCV8667yz (z is 1, 2, 3,
…
, n)
(Preset Early Warning Threshold options)
Vin
Vout
**
Driver with
Current
Limit
**
RO
Thermal
Shutdown
V
ref
EN
SI
Enable
TIMING
CIRCUIT
and
RESET
OUTPUT
DRIVER
and
SENSE
OUTPUT
DRIVER
SO
V ref
GND
DT
*
*Pull−down Resistor (~150 kW) active only in Reset State.
** 5 V option only.
Figure 4. Simplified Block Diagram of NCV8667y0
(Adjustable Early Warning Threshold options)
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3
NCV8667
EN
Vin
SI
EN
DT
SO−8
1
8
DT
Vout
SO
RO
GND
GND
GND
GND
GND
RO
SO−14
1
14
SI
Vin
GND
GND
GND
Vout
SO
Figure 5. Pin Connections
(Top View)
PIN FUNCTION DESCRIPTION
Pin No.
SO−8
3
4
5
6
7
8
1
2
Pin No.
SO−14
1
2
3, 4, 5, 6,
10, 11, 12
7
8
9
13
14
Pin Name
EN
DT
GND
RO
SO
V
out
V
in
SI
Enable Input; low level disables the IC.
Reset Delay Time Select. Short to GND or connect to V
out
to select time.
Power Supply Ground.
Reset Output. 30 kW internal Pull−Up resistor connected to V
out
. RO goes Low when V
out
drops by more than 7% (typ.) from its nominal value
Early Warning Output. 30 kW internal Pull−Up resistor connected to V
out
. It can be used to
provide early warning of an impending reset condition. Leave open if not used.
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.
Adjustable Early Warning Threshold: Sense Input; If not used, connect to V
out
.
Preset Early Warning Threshold: Early Warning Adjust Input; connect R
SI_ext
against GND
to adjust Input Voltage Early Warning Threshold or leave unconnected. See Electrical
Characteristics Table and Application Information sections for more information.
Description
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4
NCV8667
ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage DC (Note 1)
Input Voltage Transient (Note 1)
Input Current
Output Voltage (Note 2)
Output Current
Enable Input Voltage DC
Enable Input Voltage Transient
Enable Input Current Range
DT (Reset Delay Time Select) Voltage
DT (Reset Delay Time Select) Current
Reset Output Voltage
Reset Output Current
Sense Input Voltage DC
Sense Input Voltage Transient
Sense Input Current
Sense Output Voltage
Sense Output Current
Maximum Junction Temperature
Storage Temperature
ESD Capability, Human Body Model (Note 3)
ESD Capability, Machine Model (Note 3)
Lead Temperature Soldering
Reflow (SMD Styles Only) (Note 4)
Symbol
V
in
V
in
I
in
V
out
I
out
V
EN
V
EN
I
EN
V
DT
I
DT
V
RO
I
RO
V
SI
V
SI
I
SI
V
SO
I
SO
T
J(max)
T
STG
ESD
HBM
ESD
MM
T
SLD
Min
−0.3
−
−5
−0.3
−3
−0.3
−
−1
−0.3
−1
−0.3
−3
−0.3
−
−1
−0.3
−3
−40
−55
−2
−200
−
Max
40
45
−
5.5
Current
Limited
40
45
1
5.5
1
5.5
3
40
45
1
5.5
3
150
150
2
200
265 peak
Unit
V
V
mA
V
mA
V
V
mA
V
mA
V
mA
V
V
mA
V
mA
°C
°C
kV
V
°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 CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating Area.
2. 5.5 or (V
in
+ 0.3 V), whichever is lower
3. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
4. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D
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5
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