NCP189CMTWADJTAG [ONSEMI]
LDO, 500mA, Low noise, High Accuracy with Power-Good amd VoutControlled slew rate;
| 型号： | NCP189CMTWADJTAG |
| 厂家： | 
ONSEMI |
| 描述： | LDO, 500mA, Low noise, High Accuracy with Power-Good amd VoutControlled slew rate |
| 文件： | 总12页 (文件大小：297K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATA SHEET
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LDO Regulator, 0.5 A, High
Accuracy (0.7%), Adjustable,
Low Noise, High PSRR with
Power Good
MARKING
DIAGRAMS
WDFNW6 2x2, 0.65P
CASE 511DW
XXMG
G
XXX
A
L
= Specific Device Code
= Assembly Location
= Wafer Lot
NCP189
The NCP189 is a 0.5 A LDO, next generation of high PSRR, low
noise and low dropout regulators with Power Good open collector
output. Designed to meet the requirements of RF and sensitive analog
circuits, the NCP189 device provides low noise, high PSRR and low
quiescent current while offering the ability to regulate output voltages
down to 0.6 V. The device also offers excellent load / line transients.
The NCP189 is designed to work with a 4.7 mF input and output
ceramic capacitor. It is available in industry standard WDFNW6
0.65P, 2 mm x 2 mm.
M
Y
W
G
= Month Code
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTONS
Features
• Operating Input Voltage Range: 1.6 V to 5.5 V
• Available in Fixed Voltage Option: 0.6 V to 5.0 V
• Adjustable Version Reference Voltage: 0.6 V
•
•
0.7% Initial Accuracy at 25°C
1% Accuracy Over Load and Temperature
• Low Quiescent Current Typ. 35 mA
• Shutdown Current: Typ. 0.1 mA
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 11 of this data sheet.
• Very Low Dropout: Typ. 65 mV at 500 mA for 3.3 V Variant
• High PSRR: Typ. 85 dB at 100 mA, f = 1 kHz
• Low Noise: 10 mV
(Fixed Version)
RMS
• Stable with a 4.7 mF Small Case Size Ceramic Capacitors
• Controlled Output Voltage Slew Rate from 5 mV / ms
• Available in WDFNW6 2 mm x 2 mm x 0.75 mm Case 511DW
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
• Communication Systems
• In−Vehicle Networking
• Telematics, Infotainment and Clusters
• General Purpose Automotive
V
IN
V
OUT
IN
OUT
NCP189
R1
R2
ADJ version
FB
4.7 mF
Ceramic
4.7 mF
Ceramic
C
C
IN
OUT
EN
GND
ON
OFF
Figure 1. Typical Application Schematics
© Semiconductor Components Industries, LLC, 2022
1
Publication Order Number:
July, 2022 − Rev. 0
NCP189/D
NCP189
PIN FUNCTION DESCRIPTION
Pin No.
WDFNW6
Pin
Name
Description
1
6
OUT
IN
Regulated output voltage. The output should be bypassed with small 4.7 mF ceramic capacitor
Input voltage supply pin
4
EN
Chip enable: Applying V < 0.4 V disables the regulator, Pulling V > 1 V enables the LDO
EN EN
5
PG
Power Good, open collector. Use 10 kW to 100 kW pull−up resistor connected to output or input voltage
Common ground connection
3
GND
FB
2
Adjustable output feedback pin (for adjustable version only)
2
SNS
PAD
Sense feedback pin. Must be connected to OUT pin on PCB (for fixed versions only)
Expose pad should be tied to ground plane for better power dissipation
PAD
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
V
Input Voltage (Note 1)
V
IN
*0.3 to 6
Output Voltage
V
OUT
−0.3 to V + 0.3, max. 6
V
IN
Chip Enable Input
V
*0.3 to 6
*0.3 to 6
20
V
EN
PG
PG
Power Good Voltage
V
V
Power Good Current
I
mA
s
Output Short Circuit Duration
Maximum Junction Temperature
Storage Temperature
t
unlimited
150
SC
T
°C
°C
V
J
TSTG
−55 to 150
2000
ESD Capability, Human Body Model (Note 2)
ESD Capability, Charged Device Model (Note 2)
ESDHBM
ESDCDM
1000
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 CHARACTERISTIS 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 AEC−Q100−002 (EIA/JESD22−A114)
ESD Charged Device Model tested per EIA/JESD22−C101, Field Induced Charge Model
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2
NCP189
THERMAL CHARACTERISTICS
Rating
Symbol
Value
Unit
Thermal Characteristics, WDFNW6−2x2, 0.65 Pitch Package
Thermal Resistance, Junction−to−Ambient (Note 3)
Thermal Resistance, Junction−to−Case (top)
RqJA
RqJC(top)
RqJC(bot)
RqJB
60
167
6.9
6.6
4.6
6.5
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Thermal Resistance, Junction−to−Case (bottom) (Note 4)
Thermal Resistance, Junction−to−Board
Characterization Parameter, Junction−to−Top
YJT
Characterization Parameter, Junction−to−Board
YJB
2
3. The junction−to−ambient thermal resistance under natural convection is obtained in a simulation on a high−K board (2s2p, 1in , 1oz Cu)
following the JEDEC51.7 guidelines with assumptions as above, in an environment described in JESD51−2a.
4. The junction−to−case (bottom) thermal resistance is obtained by simulating a cold plate test on the IC exposed pad. Test description can
be found in the ANSI SEMI standard G30−88.
ELECTRICAL CHARACTERISTICS
−40°C ≤ T ≤ 125°C; V = V
+ 0.5 V or 1.6 V, whichever is greater, I
= 1 mA, C = C
= 4.7 mF, V = V , unless
J
IN
OUT(NOM)
OUT
IN
OUT
EN
IN
otherwise noted. Typical values are at T = +25°C (Note 5).
J
Characteristic
Operating Input Voltage
Under Voltage Lock Out
Output Voltage Accuracy
Symbol
Test Conditions
Min
Typ
−
Max
5.5
−
Unit
V
V
IN
1.6
−
V
UVLO
1.5
V
V
OUT
V
J
= V
+ 0.5 V, I
= 1 mA
−0.7
V
NOM
+0.7
%
IN
OUT(NOM)
OUT
T = +25°C
V
= V
+ 0.5 V to 5.5 V,
−1
V
+1
%
V
IN
OUT(NOM)
OUT
NOM
0.1 mA ≤ I
≤ 0.5 A
Reference Voltage (Adjustable Ver.
FB pin connected to OUT)
V
FB
V
IN
= 1.6 V to 5.5 V,
0.594
0.6
0.606
0.1 mA ≤ I
≤ 0.5 A
OUT
Line Regulation
Line
V
+ 0.5 V ≤ V ≤ 5.5 V
−
−
−
−
−
−
−
−
−
−
−
−
−
1
0
−
−
−
−
−
0.5
2
−
mV/V
mV
Reg
OUT(NOM)
IN
Load Regulation
Load
I
I
= 1 mA to 0.5 A
−
Reg
OUT
OUT
Dropout Voltage (Note 5)
V
DO
= 500 mA
V
V
V
V
V
V
V
= 1.5 V
= 1.8 V
= 2.5 V
= 2.8 V
= 3.0 V
= 3.3 V
= 5.0 V
109
93
74
69
67
65
58
750
750
35
0.1
−
175
152
121
113
110
108
95
mV
OUT(NOM)
OUT(NOM)
OUT(NOM)
OUT(NOM)
OUT(NOM)
OUT(NOM)
OUT(NOM)
Output Current Limit
Short Circuit Current
Quiescent Current
I
CL
V
V
= 90% V
= 0 V
850
−
mA
OUT
OUT(NOM)
I
SC
OUT
I
Q
I
= 0 mA
55
mA
mA
V
OUT
Shutdown Current
I
V
EN
≤ 0.4 V, T ≤ 125°C
3.5
DIS
J
EN Pin Threshold Voltage
V
ENH
EN Input Voltage “H”
EN Input Voltage “L”
V
IN
V
ENL
−
0.4
0.6
−
EN Pull Down Current
I
V
EN
= 5 V
0.2
95
90
30
85
mA
EN
Power Good Threshold Voltage
V
Output Voltage Raising
Output Voltage Falling
%
PGUP
PGDW
V
−
Power Good Output Voltage Low
V
PGLO
I
= 1 mA, Open drain
100
−
mV
PG
Turn−On Delay Time
C
= 4.7 mF, From assertion of V to
start raise
ms
OUT
OUT
EN
V
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NCP189
ELECTRICAL CHARACTERISTICS (continued)
−40°C ≤ T ≤ 125°C; V = V
+ 0.5 V or 1.6 V, whichever is greater, I
= 1 mA, C = C
= 4.7 mF, V = V , unless
J
IN
OUT(NOM)
OUT
IN
OUT
EN
IN
otherwise noted. Typical values are at T = +25°C (Note 5).
J
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
Slew Rate Time (“C” option)
C
= 4.7 mF, From assertion of V to
−
−
−
−
5
−
mV/ms
OUT
VOUT = 95% V
EN
OUT(NOM)
Slew Rate Time (“D” option)
Slew Rate Time (“E” option)
Slew Rate Time (“F” option)
Power Supply Rejection Ratio
C
= 4.7 mF, From assertion of V to
10
30
−
−
−
mV/ms
mV/ms
mV/ms
dB
OUT
OUT
EN
V
= 95% V
OUT(NOM)
C
= 4.7 mF, From assertion of V to
EN
OUT
OUT
V
= 95% V
OUT(NOM)
C
= 4.7 mF, From assertion of V to
100
OUT
OUT
EN
V
= 95% V
OUT(NOM)
PSRR
V
OUT
= 3.3 V, f = 1 kHz
f = 10 kHz
−
−
−
−
−
85
75
53
40
10
−
−
−
−
−
OUT(NOM)
I
= 100 mA
f = 100 kHz
f = 1 MHz
Output Voltage Noise (Fixed Ver.)
Thermal Shutdown Threshold
V
N
f = 10 Hz to
100 kHz
I
= 100 mA
mV
RMS
OUT
T
SDH
Temperature rising
−
−
−
165
15
−
−
−
°C
°C
W
T
HYST
Temperature hysteresis
VEN < 0.4 V, AD Version only
Active Output Discharge
Resistance
R
250
DIS
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.
5. Performance guaranteed over the indicated operating temperature range by design and/or characterization. Production tested at T = 25°C.
A
Low duty cycle pulse techniques are used during the testing to maintain the junction temperature as close to ambient as possible.
6. Dropout voltage is characterized when V
7. Guaranteed by design.
falls 3% below V
.
OUT
OUT(NOM)
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NCP189
TYPICAL CHARACTERISTICS
0.808
0.806
0.804
0.802
0.800
0.798
0.608
0.606
0.604
0.602
0.600
0.598
0.596
0.594
0.592
V
I
= 1.6 V
= 1 mA
0.796
0.794
0.792
V
I
C
= 1.6 V
= 1 mA
IN
IN
OUT
OUT
C
= 4.7 mF
= 4.7 mF
OUT
OUT
−40 −20
0
20
40
60
80
100 120
−40 −20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
Figure 2. Output Voltage vs. Temperature −
Figure 3. Output Voltage vs. Temperature −
V
OUT = 0.6 V (Adjustable Reference)
VOUT = 0.8 V
1.812
1.809
1.806
1.803
1.800
1.797
1.794
1.791
1.788
1.212
1.209
1.206
1.203
1.200
1.197
1.194
1.191
1.188
V
= 1.6 V
= 1 mA
V
= 2.3 V
= 1 mA
= 4.7 mF
OUT
IN
IN
I
I
OUT
OUT
C
= 4.7 mF
C
OUT
−40 −20
0
20
40
60
80
100 120
−40 −20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
Figure 4. Output Voltage vs. Temperature −
OUT = 1.2 V
Figure 5. Output Voltage vs. Temperature −
V
VOUT = 1.8 V
3.324
3.318
3.312
3.306
3.300
3.294
3.288
3.282
3.276
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
V
I
C
= 3.0 V
= 1 mA
V
I
C
= 3.8 V
= 1 mA
IN
IN
OUT
OUT
= 4.7 mF
= 4.7 mF
OUT
OUT
−40 −20
0
20
40
60
80
100 120
−40 −20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
Figure 6. Output Voltage vs. Temperature −
OUT = 2.5 V
Figure 7. Output Voltage vs. Temperature −
V
VOUT = 3.3 V
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NCP189
TYPICAL CHARACTERISTICS (continued)
95
87.5
80
125
115
105
95
72.5
65
85
57.5
75
V
I
C
= 1.8 V
= 0.5 A
= 4.7 mF
V
I
C
= 2.5 V
= 0.5 A
= 4.7 mF
OUT
OUT
50
42.5
35
65
OUT
OUT
55
OUT
OUT
45
−40 −20
0
20
40
60
80
100 120
−40 −20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
Figure 8. Dropout Voltage vs. Temperature −
OUT = 1.8 V
Figure 9. Dropout Voltage vs. Temperature −
V
VOUT = 2.5 V
200
175
150
125
100
75
92.5
85
I
C
= 0.5 A
OUT
= 4.7 mF
OUT
77.5
70
T = 125°C
A
T = 25°C
A
62.5
55
V
= 3.3 V
= 0.5 A
= 4.7 mF
50
47.5
40
OUT
T = −40°C
A
I
OUT
25
C
OUT
0
32.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
−40 −20
0
20
40
60
80
100
120
Temperature (°C)
Output Voltage (V)
Figure 10. Dropout Voltage vs. Temperature −
OUT = 3.3 V
Figure 11. Dropout Voltage vs. Output Voltage
V
850
825
850
825
800
775
750
800
775
750
725
700
675
650
725
700
675
650
C
= 4.7 mF
OUT
C
= 4.7 mF
OUT
−40 −20
0
20
40
60
80
100 120
−40 −20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
Figure 12. Current Limit vs. Temperature
Figure 13. Short Circuit Current vs. Temperature
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NCP189
TYPICAL CHARACTERISTICS (continued)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.10
0.00
−0.10
−0.20
−0.30
−0.40
V
I
C
= 2.5 V
= 1 mA
= 4.7 mF
V
V
C
= 2.5 V
= 4.7 mF
80
OUT
OUT
−0.50
−0.60
−0.70
= 3.0 V
OUT
IN
OUT
OUT
−40 −20
0
20
40
60
80
100 120
−40 −20
0
20
40
60
100 120
Temperature (°C)
Temperature (°C)
Figure 14. Line Regulation vs. Temperature
Figure 15. Load Regulation vs. Temperature
80
70
60
50
40
30
20
10
0
46
44
42
40
38
36
34
32
30
T = 25°C
OUT
V
I
C
= 3.3 V
= 0 mA
= 4.7 mF
A
OUT
I
= 0 mA
OUT
C
= 4.7 mF
OUT
OUT
−40 −20
0
20
40
60
80
100 120
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Temperature (°C)
Input Voltage (V)
Figure 16. Quiescent Current vs. Temperature
Figure 17. Quiescent Current vs. Input Voltage
170
150
130
110
90
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
V
I
C
= 0.6 V
= 1 mA
= 4.7 mF
I
C
= 0 mA
OUT
OUT
= 4.7 mF
OUT
OUT
OUT
70
50
30
10
−40 −20
0
20
40
60
80
100 120
−40 −20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
Figure 18. Disable Current vs. Temperature
Figure 19. Feedback Input Current vs.
Temperature (Adjustable Option)
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NCP189
TYPICAL CHARACTERISTICS (continued)
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
96
95
94
V
raising
OUT
to nominal
93
92
91
90
89
88
Output ON
Output OFF
V
falling
OUT
from nominal
−40 −20
0
20
40
60
80
100 120
−40
−20
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
Figure 21. Power Good Threshold vs.
Temperature
Figure 20. Enable Threshold vs. Temperature
20
19
18
17
16
15
14
13
12
254
252
250
248
246
244
242
240
238
I
C
= 1. mA
EN = Low
PG
= 4.7 mF
C
= 4.7 mF
OUT
OUT
−40
−20
0
20
40
60
80
100
120
−40 −20
0
20
40
60
80
100 120
Temperature (°C)
Temperature (°C)
Figure 22. Power Good Saturation Voltage vs.
Temperature
Figure 23. Active Discharge Resistance vs.
Temperature
130
450
400
350
300
250
200
150
100
50
120
110
100
90
80
70
60
50
40
30
20
10
0
V
V
= 3.0 V
IN
= 2.5 V
OUT
T = 25°C
A
C
= 4.7 mF
OUT
− Iout = 10 mA
− Iout = 100 mA
− Iout = 500 mA
T = 25°C
A
EN = Low
C
= 4.7 mF
OUT
10000
0,1
1
10
100
1000
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
Frequency (kHz)
Figure 24. Active Discharge Resistance vs.
Input Voltage
Figure 25. Power Supply Rejection Ratio
for VOUT = 2.5 V, COUT = 4.7 mF
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NCP189
TYPICAL CHARACTERISTICS (continued)
10000
V
V
I
= 3.0 V
IN
OUT
= 2.5 V
= 10 mA
1000
100
OUT
T = 25°C
A
C
= 4.7 mF
OUT
1
2
10
1
0.01
0.1
1
10
100
1000 10000
Frequency (kHz)
Figure 27. Controlled Output Voltage Slew Rate
Figure 26. Output Voltage Noise Spectral
Density for VOUT = 2.5 V, COUT = 4.7 mF
APPLICATIONS INFORMATION
Power Good Output Connection
The NCP189 is the member of new family of high output
current and low dropout regulators which delivers low
quiescent and ground current consumption, good noise and
power supply ripple rejection ratio performance. The
NCP189 incorporates EN pin and power good output for
simple controlling by MCU or logic. Standard features
include current limiting, soft−start feature and thermal
protection.
The NCP189 include Power Good functionality for better
interfacing to MCU system. Power Good output is open
collector type, capable to sink up to 10 mA. Recommended
operating current is between 10 mA and 1 mA to obtain low
saturation voltage. External pull−up resistor can be
connected to any voltage up to 5.5 V (please see Absolute
Maximum Ratings table above).
Please note that Power Good internal circuitry is
non−functional (disabled) to achieve the lowest possible
internal current consumption in case of disabled LDO
through Enable input (EN = Low). In this case internal
Power Good transistor is open and output logic level is
defined by voltage used for pull−up resistor. When Power
Good is intended to be used as part of power sequencing
functionality, then please connect external pull−up resistor
to output voltage of NCP189. This will allow you to get
correct low PG signal when LDO is disabled. Active
discharge option is recommended to discharge output
capacitors connected to LDO.
Power Good signal is internally delayed avoiding reaction
to short glitches in output voltage. Blanking time is about
9 ms when voltage is decreasing from nominal value and
about 18 ms when voltage is increasing back to nominal
value.
Input Decoupling (CIN)
It is recommended to connect at least 4.7 mF ceramic X5R
or X7R capacitor between IN and GND pin of the device.
This capacitor will provide a low impedance path for any
unwanted AC signals or noise superimposed onto constant
input voltage. The good input capacitor will limit the
influence of input trace inductances and source resistance
during sudden load current changes. Higher capacitance and
lower ESR capacitors will improve the overall line transient
response.
Output Decoupling (COUT
)
The NCP189 does not require a minimum Equivalent
Series Resistance (ESR) for the output capacitor. The device
is designed to be stable with standard ceramics capacitors
with values of 2.2 mF or greater. For the best performance
and stability under all conditions (temperature, output
current load etc.) is recommended to use 4.7 mF or higher
capacitor. The X5R and X7R types have the lowest
capacitance variations over temperature thus they are
suitable. Please note that too high output capacity (for
example 100 mF and more) may cause instability under some
conditions, especially under very light load condition.
Controlled Output Voltage Slew Rate
The NCP189 has internal output voltage slew rate control
(see Figure 27). After enable event there is about 85 ms dead
time required to proper start−up of all internal LDO blocks.
When this time ends, output voltage starts to raise
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NCP189
Hints
monotonously from zero to nominal output voltage. Total
V
IN
and GND printed circuit board traces should be as
time need to settle LDO output on nominal voltage is given
by voltage option and slew rate. Customer can choose from
4 available options – 5 mV/ms, 10 mV/ms, 30 mV/ms and
100 mV/ms.
In case of adjustable application please remember that
selected slew rate is controlled for voltage raise from 0 V to
reference voltage. It means that slew rate is multiplied by
Vout / Vref ratio.
wide as possible. When the impedance of these traces is
high, there is a chance to pick up noise or cause the regulator
to malfunction. Place external components, especially the
output capacitor, as close as possible to the NCP189, and
make traces as short as possible.
Adjustable Version
In case customer needs non−standard / special voltage
option, but output noise is critical too, there is one option. In
such case customer can use fixed version and connect
external resistor divider between output voltage and SNS
pin. Under such condition, original fixed voltage becomes
reference voltage for resistor divider and feedback loop.
Output voltage can be equal or higher than original fixed
option, while possible range is from 0.6 V up to 5.0 V.
Figure 28 shows how to add external resistors to increase
output voltage above fixed value.
Power Dissipation and Heat Sinking
The maximum power dissipation supported by the device
is dependent upon board design and layout. Mounting pad
configuration on the PCB, the board material, and the
ambient temperature affect the rate of junction temperature
rise for the part. For reliable operation junction temperature
should be limited to +125°C, however device is capable to
work up to junction temperature +150°C (in range from
+125°C to +150°C parameters are not guaranteed). The
maximum power dissipation the NCP189 can handle is
given by:
Output voltage is then given by equation
ǒ
)
VOUT + VFIX * 1 ) RńR2
(eq. 4)
ƪT
ƫ
J(MAX) * TA
where V
is voltage of original fixed version (from 0.6 V
PD(MAX)
+
FIX
(eq. 1)
RqJA
up to 5.0 V) or adjustable version (0.6 V). Do not operate the
device at output voltage about 5.2 V, as device can be
damaged.
Typical current flowing into FB pin is below 200 nA
(adjustable option), where current flowing into SNS pin is
below 900 nA (fixed options). In order to avoid influence of
this current to output voltage accuracy, it is recommended
use values of R1 and R2 in range from 1 kW to 220 kW.
The power dissipated by the NCP189 for given
application conditions can be calculated from the following
equations:
ǒ
Ǔ
ǒ
Ǔ
PD [ VIN IGND(IOUT) ) IOUT VIN * VOUT
(eq. 2)
or
ǒ
Ǔ
PD(MAX) ) VOUT IOUT
VIN(MAX)
[
(eq. 3)
IOUT ) IGND
V
IN
V
OUT
IN
OUT
NCP189
ADJ or FIX version
FB / SNS
GND
R1
R2
4.7 mF
Ceramic
4.7 mF
Ceramic
C
IN
EN
C
OUT
ON
OFF
Figure 28. Adjustable Variant Application
Please note that output noise is amplified by V
/ V
For noise sensitive applications it is recommended to use as
high fixed variant as possible – for example in case above it
is better to use 3.3 V fixed variant to create 3.6 V output
voltage, as output noise will be amplified only
3.6 / 3.3 = 1.09x (10.9 mVrms).
OUT
FIX
or V
/ V
ratio. For example, if original 0.6 V
OUT
FB
adjustable variant is used to create non−standard 3.6 V
output voltage, output noise is increased 3.6 / 0.6 = 6 times
and real noise value will be 6 * 10 mVrms = 60 mVrms.
www.onsemi.com
10
NCP189
ORDERING INFORMATION
†
Device part no. *
Voltage Option
Marking
Option
Package
Shipping
NCP189CMTWADJTAG
ADJ
1.2 V
1.8 V
3.3 V
AE
With Active Output Discharge,
Slew Rate 5ꢀmV/ms
WDFNW6 2x2
3000 / Tape &
Reel
(Pb−Free)
NCP189CMTW120TAG
NCP189CMTW180TAG
NCP189CMTW330TAG
AA
AC
AD
With Active Output Discharge,
Slew Rate 5ꢀmV/ms
WDFNW6 2x2
(Pb−Free)
3000 / Tape &
Reel
With Active Output Discharge,
Slew Rate 5ꢀmV/ms
WDFNW6 2x2
(Pb−Free)
3000 / Tape &
Reel
With Active Output Discharge,
Slew Rate 5ꢀmV/ms
WDFNW6 2x2
(Pb−Free)
3000 / Tape &
Reel
*Other voltage options and slew rate options (D / E / F) upon request.
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
www.onsemi.com
11
NCP189
PACKAGE DIMENSIONS
WDFNW6 2x2, 0.65P
CASE 511DW
ISSUE B
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