NCP146
300 mA CMOS Low Dropout
Regulator
The NCP146 is 300 mA LDO that provides the engineer with a very
stable, accurate voltage with low noise suitable for space constrained,
noise sensitive applications. In order to optimize performance for
battery operated portable applications, the NCP146 employs the
dynamic quiescent current adjustment for very low I
Q
consumption at
no−load.
Features
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MARKING
DIAGRAM
8
8
1
SOIC−8
CASE 751
1
A
L
Y
W
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PC180
ALYW
G
•
•
•
•
•
•
•
•
•
•
Operating Input Voltage Range: 1.7 V to 5.5 V
Available in Fixed Voltage Options: 1.8 V
Very Low Quiescent Current of Typ. 50
mA
Low Dropout: 280 mV Typical at 300 mA
±1%
Accuracy at Room Temperature
High Power Supply Ripple Rejection: 75 dB at 1 kHz
Thermal Shutdown and Current Limit Protections
Stable with a 1
mF
Ceramic Output Capacitor
Available in SOIC−8 Package
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
PIN CONNECTIONS
OUT
GND
GND
N/C
1
2
3
4
SOIC−8
(Top View)
8
7
6
5
IN
GND
GND
N/C
Typical Applicaitons
•
Home Automation, Factory Automation
•
Portable Medical Equipment
•
Other Battery Powered Applications
V
IN
IN
NCP146
C
IN
GND
OUT
C
OUT
1
mF
Ceramic
V
OUT
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 8 of this data sheet.
Figure 1. Typical Application Schematic
©
Semiconductor Components Industries, LLC, 2016
1
July, 2017 − Rev. 1
Publication Order Number:
NCP146/D
NCP146
IN
THERMAL
SHUTDOWN
BANDGAP
REFERENCE
MOSFET
DRIVER WITH
CURRENT LIMIT
OUT
AUTO LOW
POWER MODE
GND
Figure 2. Simplified Schematic Block Diagram
PIN FUNCTION DESCRIPTION
Pin No.
1
2, 3, 6, 7
8
4, 5
Pin Name
OUT
GND
IN
N/C
Description
Regulated output voltage pin. A small ceramic capacitor with minimum value of 1
mF
is needed from this
pin to ground to assure stability.
Power supply ground.
Input pin. A small capacitor is needed from this pin to ground to assure stability.
Not connected. This pin can be tied to ground to improve thermal dissipation.
ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage (Note 1)
Output Voltage
Output Short Circuit Duration
Maximum Junction Temperature
Storage Temperature
ESD Capability, Human Body Model (Note 2)
ESD Capability, Machine Model (Note 2)
Symbol
V
IN
V
OUT
t
SC
T
J(MAX)
T
STG
ESD
HBM
ESD
MM
Value
−0.3 V to 6 V
−0.3 V to V
IN
+ 0.3 V or 6 V
∞
150
−55 to 150
2000
200
Unit
V
V
s
°C
°C
V
V
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
2. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per EIA/JESD22−A114,
ESD Machine Model tested per EIA/JESD22−A115,
Latchup Current Maximum Rating tested per JEDEC standard: JESD78.
THERMAL CHARACTERISTICS
(Note 3)
Rating
Thermal Characteristics, SOIC−8
Thermal Resistance, Junction−to−Air
3. Single component mounted on 1 oz, FR 4 PCB with 645 mm
2
Cu area.
Symbol
R
qJA
Value
161
Unit
°C/W
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NCP146
ELECTRICAL CHARACTERISTICS
−40°C
≤
T
J
≤
85°C; V
IN
= 2.8 V, I
OUT
= 1 mA, C
IN
= C
OUT
= 1
mF.
Typical values are at T
J
= +25°C. Min./Max. are for T
J
= −40°C and T
J
=
+85°C respectively (Note 4).
Parameter
Operating Input Voltage
Output Voltage Accuracy
Line Regulation
Load Regulation
Load Regulation
Load Transient
Dropout Voltage (Note 5)
Output Current Limit
Quiescent Current
Power Supply Rejection Ratio
Output Noise Voltage
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
−40°C
≤
T
J
≤
85°C
V
OUT
+ 0.5 V
≤
V
IN
≤
5.5 V
I
OUT
= 1 mA to 150 mA
I
OUT
= 1 mA to 300 mA
I
OUT
= 1 mA to 300 mA or 300 mA to 1 mA
in 1
ms,
C
OUT
= 1
mF
I
OUT
= 300 mA
V
OUT
= 90% V
OUT(nom)
I
OUT =
0 mA
V
IN
= 2.8 V, V
OUT
= 1.8 V
I
OUT
= 150 mA
f = 1 kHz
Reg
LOAD
Tran
LOAD
V
DO
I
CL
I
Q
PSRR
V
N
T
SD
T
SDH
300
Test Conditions
Symbol
V
IN
V
OUT
Reg
LINE
Min
1.7
−2
0.01
15
30
−50/
+30
280
600
50
75
70
160
20
95
mV
mV
mA
mA
dB
mV
rms
°C
°C
Typ
Max
5.5
+3
0.1
Unit
V
%
%/V
mV
V
IN
= 2.8 V, V
OUT
= 1.8 V, I
OUT
= 150 mA
f = 10 Hz to 100 kHz
Temperature increasing from T
J
= +25°C
Temperature falling from T
SD
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
4. Performance guaranteed over the indicated operating temperature range by design and/or characterization. Production tested at
T
J
= T
A
= 25°C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
5. Characterized when V
OUT
falls 100 mV below the regulated voltage at V
IN
= V
OUT(NOM)
+ 1 V.
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NCP146
TYPICAL CHARACTERISTICS
1.83
V
OUT
, OUTPUT VOLTAGE (V)
1.82
1.81
1.80
1.79
1.78
1.77
1.76
1.75
V
IN
= 2.8 V
V
OUT
= 1.8 V
C
IN
= 1
mF
C
OUT
= 1
mF
−20
0
20
40
60
80
I
OUT
= 300 mA
I
OUT
= 1 mA
REG
LINE
, LINE REGULATION (%/V)
0.10
0.08
0.06
0.04
0.02
0
−0.02
−0.04
−0.06
V
IN
= 2.8 to 2.5 V
V
OUT
= 1.8 V
I
OUT
= 1 mA
C
IN
= 1
mF
C
OUT
= 1
mF
−20
0
20
40
60
80
1.74
1.73
−40
−0.08
−0.10
−40
T
J
, JUNCTION TEMPERATURE (°C)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 3. Output Voltage vs. Temperature
50
REG
LOAD
, LOAD REGULATION (mV)
45
40
35
30
25
20
15
10
5
0
−40
V
IN
= 2.8 V
V
OUT
= 1.8 V
I
OUT
= 1 to 300 mA
C
IN
= 1
mF
(MLCC)
C
OUT
= 1
mF
(MLCC)
−20
0
20
40
60
80
1000
I
GND
, GROUND CURRENT (mA)
900
800
700
600
500
400
300
200
100
0
Figure 4. Line Regulation vs. Temperature
85°C
25°C
140°C
V
IN
= 3.8 V
V
OUT
= 2.8 V
C
IN
= 1
mF
C
OUT
= 1
mF
0.001 0.01
0.1
1
10
100
1000
T
J
, JUNCTION TEMPERATURE (°C)
I
OUT
, OUTPUT CURRENT (mA)
Figure 5. Load Regulation vs. Temperature
1000
I
GND
, GROUND CURRENT (mA)
900
800
700
600
500
400
300
200
100
0
−40
−20
0
20
40
60
80
I
OUT
= 1 mA
V
IN
= 3.8 V
V
OUT
= 2.8 V
C
IN
= 1
mF
C
OUT
= 1
mF
I
OUT
= 300 mA
V
DROP
, DROPOUT VOLTAGE (mV)
300
270
240
210
180
150
120
90
60
30
0
0
Figure 6. Ground Current vs. Output Current
T
J
= 85°C
T
J
= 25°C
T
J
= −40°C
V
IN
= 2.8 V
V
OUT
= 1.8 V
C
IN
= 1
mF
C
OUT
= 1
mF
25
50 75 100 125 150 175 200 225 250 275 300
I
OUT
, OUTPUT CURRENT (mA)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 7. Ground Current vs. Temperature
Figure 8. Dropout Voltage vs. Output Current
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NCP146
TYPICAL CHARACTERISTICS
I
SC
, SHORT CIRCUIT CURRENT (mA)
800
750
I
CL
, CURRENT LIMIT (mA)
700
650
600
550
500
450
400
350
300
−40
−20
0
20
V
IN
= 2.8 V
V
OUT
= 90% V
OUT(nom)
C
IN
= 1
mF
C
OUT
= 1
mF
40
60
80
800
750
700
650
600
550
500
450
400
350
300
−40
V
IN
= 2.8 V
V
OUT
= 0 V
C
IN
= 1
mF
C
OUT
= 1
mF
−20
0
20
40
60
80
T
J
, JUNCTION TEMPERATURE (°C)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 9. Current Limit vs. Temperature
100
RR, RIPPLE REJECTION (dB)
Unstable Operation
10
ESR (W)
100
90
80
70
60
50
40
30
20
10
0
300
10
Figure 10. Short Circuit Current vs.
Temperature
I
OUT
= 1 mA
I
OUT
= 10 mA
I
OUT
= 300 mA
1
Stable Operation
0.1
0.01
0
50
100
150
V
IN
= 5.5 V
C
IN
= 1
mF
C
OUT
= 1
mF
MLCC, X7R, 1206
200
250
V
IN
= 2.8 V
V
OUT
= 1.8 V
C
IN
= none
C
OUT
= 1
mF
MLCC, X7R, 1206
100
1K
10K
100K
1M
10M
I
OUT
, OUTPUT CURRENT (mA)
FREQUENCY (Hz)
Figure 11. Output Capacitor ESR vs. Output
Current
10K
OUTPUT VOLTAGE NOISE (nV/√Hz)
I
OUT
= 1 mA
I
OUT
= 10 mA
I
OUT
= 300 mA
Figure 12. Power Supply Rejection Ratio,
C
OUT
= 1
mF
1K
I
OUT
100
1 mA
10 mA
10
V
IN
= 2.8 V
V
OUT
= 1.8 V
C
IN
= 1
mF
MLCC (X7R)
C
OUT
= 1
mF
MLCC (X7R)
10
100
1K
10K
100K
1M
300 mA
RMS Output Noise (mV)
10 Hz − 100 kHz
59.97
60.22
70.35
100 Hz − 100 kHz
57.07
57.17
67.79
1
FREQUENCY (Hz)
Figure 13. Output Voltage Noise Spectral Density
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