© Semiconductor Components Industries, LLC, 2017
August, 2018 − Rev. 4 1Publication Order Number:
NCP115/D
NCP115
LDO Regulator, 300 mA,
High PSRR
The NCP115 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 NCP115 employs the
dynamic quiescent current adjustment for very low IQ consumption at
no−load.
Features
•Operating Input Voltage Range: 1.7 V to 5.5 V
•Available in Fixed Voltage Options: 0.8 V to 3.6 V
Contact Factory for Other Voltage Options
•Very Low Quiescent Current of Typ. 50 mA
•Soft Start Feature with Two VOUT Slew Rate Speed
•Standby Current Consumption: Typ. 0.1 mA
•Low Dropout: 250 mV Typical at 300 mA @ 2.8 V
•±1% Accuracy at Room Temperature
•High Power Supply Ripple Rejection: 70 dB at 1 kHz
•Thermal Shutdown and Current Limit Protections
•Available in XDFN4 and TSOP−5 Packages
•Stable with a 1 mF Ceramic Output Capacitor
•These are Pb−Free Devices
Typical Applicaitons
•PDAs, Mobile phones, GPS, Smartphones
•Wireless Handsets, Wireless LAN, Bluetooth®, Zigbee®
•Portable Medical Equipment
•Other Battery Powered Applications
Figure 1. Typical Application Schematic
NCP115
IN
EN
OUT
GND
OFF ON
VOUT
COUT
1 mF
Ceramic
CIN
VIN
MARKING
DIAGRAMS
See detailed ordering, marking and shipping information on
page 15 of this data sheet.
ORDERING INFORMATION
PIN CONNECTIONS
XX = Specific Device Code
M = Date Code
34
12
GND OUT
EN IN
(Bottom View)
XDFN4
CASE 711AJ XX M
1
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XX = Device Code
M = Date Code*
G= Pb−Free Package
XX M G
G
1
5
(Note: Microdot may be in either location)
*Date Code orientation and/or position may
vary depending upon manufacturing location.
TSOP−5
CASE 483
OUTIN
GND
N/C
EN
1
2
34
5
(Top View)
1
1
5
NCP115
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2
IN
OUT
BANDGAP
REFERENCE
ACTIVE
DISCHARGE*
MOSFET
DRIVER WITH
CURRENT LIMIT
THERMAL
SHUTDOWN
ENABLE
LOGIC
GND
AUTO LOW
POWER MODE
EN
EN
Figure 2. Simplified Schematic Block Diagram
*Active output discharge function is present only in NCP115A and NCP115C devices.
yyy denotes the particular VOUT option.
PIN FUNCTION DESCRIPTION
Pin No.
(XDFN4) Pin No.
(TSOP5) Pin Name Description
1 5 OUT Regulated output voltage pin. A small ceramic capacitor with minimum value of 1 mF is need-
ed from this pin to ground to assure stability.
2 2 GND Power supply ground.
3 3 EN Driving EN over 0.9 V turns on the regulator. Driving EN below 0.4 V puts the regulator into
shutdown mode.
4 1 IN Input pin. A small capacitor is needed from this pin to ground to assure stability.
− 4 N/C Not connected. This pin can be tied to ground to improve thermal dissipation.
− − EPAD Exposed pad should be connected directly to the GND pin. Soldered to a large ground cop-
per plane allows for effective heat removal.
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
Input Voltage (Note 1) VIN −0.3 V to 6 V V
Output Voltage VOUT −0.3 V to VIN + 0.3 V or 6 V V
Enable Input VEN −0.3 V to 6 V V
Output Short Circuit Duration tSC ∞s
Maximum Junction Temperature TJ(MAX) 150 °C
Storage Temperature TSTG −55 to 150 °C
ESD Capability, Human Body Model (Note 2) ESDHBM 2000 V
ESD Capability, Machine Model (Note 2) ESDMM 200 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 af fected.
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 Symbol Value Unit
Thermal Characteristics, XDFN4 1x1 mm
Thermal Resistance, Junction−to−Air RqJA 208 °C/W
Thermal Characteristics, TSOP−5
Thermal Resistance, Junction−to−Air RqJA 162 °C/W
3. Single component mounted on 1 oz, FR 4 PCB with 645 mm2 Cu area.
NCP115
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ELECTRICAL CHARACTERISTICS −40°C ≤ TJ ≤ 85°C; VIN = VOUT(NOM) + 1 V for VOUT options greater than 1.5 V. Otherwise VIN =
2.5 V, whichever is greater; IOUT = 1 mA, CIN = COUT = 1 mF, unless otherwise noted. VEN = 0.9 V. Typical values are at TJ = +25°C.
Min./Max. are for TJ = −40°C and TJ = +85°C respectively (Note 4).
Parameter Test Conditions Symbol Min Typ Max Unit
Operating Input Voltage VIN 1.7 5.5 V
Output Voltage Accuracy −40°C ≤ TJ ≤ 85°CVOUT ≤ 2.0 V VOUT −40 +40 mV
VOUT > 2.0 V −2 +2 %
Line Regulation VOUT + 0.5 V ≤ VIN ≤ 5.5 V (VIN ≥ 1.7 V) RegLINE 0.01 0.1 %/V
Load Regulation − XDFN4 package IOUT = 1 mA to 300 mA RegLOAD 12 30 mV
Load Regulation − TSOP−5 package 28 45
Dropout Voltage − XDFN4 package
(Note 5) IOUT = 300 mA VOUT = 1.8 V VDO 425 560 mV
VOUT = 2.8 V 250 320
VOUT = 3.3 V 215 260
Dropout Voltage − TSOP−5 package
(Note 5) IOUT = 300 mA VOUT = 1.8 V VDO 445 580 mV
VOUT = 2.8 V 270 340
VOUT = 3.3 V 235 280
Output Current Limit VOUT = 90% VOUT(nom) ICL 300 600 mA
Quiescent Current IOUT = 0 mA IQ50 95 mA
Shutdown Current VEN ≤ 0.4 V, VIN = 5.5 V IDIS 0.01 1 mA
EN Pin Threshold Voltage
High Threshold
Low Threshold VEN Voltage increasing
VEN Voltage decreasing VEN_HI
VEN_LO 0.9 0.4
V
VOUT Slew Rate (Note 6) VOUT = 3.3 V, IOUT = 10 mA Normal (version
A and B) VOUT_SR 190 mV/ms
Slow (version C
and D) 20
EN Pin Input Current VEN = 5.5 V IEN 0.3 1.0 mA
Power Supply Rejection Ratio VIN = 3.8 V, VOUT = 3.5 V
IOUT = 10 mA f = 1 kHz PSRR 70 dB
Output Noise Voltage f = 10 Hz to 100 kHz VN70 mVrms
Thermal Shutdown Temperature Temperature increasing from TJ = +25°C TSD 160 °C
Thermal Shutdown Hysteresis Temperature falling from TSD TSDH 20 °C
Active Output Discharge Resistance VEN < 0.4 V, Version A and C only RDIS 100 W
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
TJ = 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 VOUT falls 100 mV below the regulated voltage at VIN = VOUT(NOM) + 1 V.
6. Please refer OPN to determine slew rate. NCP115A, NCP115B − Normal speed. NCP115C, NCP115D − slower speed
NCP115
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TYPICAL CHARACTERISTICS
Figure 3. Output Voltage vs. Temperature −
VOUT = 1.2 V − XDFN4 Figure 4. Output Voltage vs. Temperature −
VOUT = 1.8 V − XDFN4
TJ, JUNCTION TEMPERATURE (°C) TJ, JUNCTION TEMPERATURE (°C)
806040200−20−40
1.170
1.180
1.190
1.200
1.210
1.220
1.770
1.775
1.785
1.790
1.800
Figure 5. Output Voltage vs. Temperature −
VOUT = 2.8 V − XDFN4 Figure 6. Output Voltage vs. Temperature −
VOUT = 3.3 V − XDFN4
TJ, JUNCTION TEMPERATURE (°C)) TJ, JUNCTION TEMPERATURE (°C)
2.770
2.780
2.785
2.790
2.800
2.805
2.815
2.820
3.260
3.265
3.275
3.280
3.290
3.295
3.305
3.310
Figure 7. Line Regulation vs. Temperature Figure 8. Load Regulation vs. Temperature −
XDFN4
TJ, JUNCTION TEMPERATURE (°C) TJ, JUNCTION TEMPERATURE (°C)
0
0.001
0.002
0.004
0.005
0
4
6
8
12
14
18
20
VOUT, OUTPUT VOLTAGE (V)
VOUT, OUTPUT VOLTAGE (V)
VOUT, OUTPUT VOLTAGE (V)
VOUT, OUTPUT VOLTAGE (V)
REGLINE, LINE REGULATION (%/V)
REGLOAD, LOAD REGULATION (mV)
IOUT = 10 mA
IOUT = 300 mA
VIN = 2.5 V
VOUT = 1.2 V
CIN = 1 mF
COUT = 1 mF
IOUT = 10 mA
IOUT = 300 mA
VIN = 2.8 V
VOUT = 1.8 V
CIN = 1 mF
COUT = 1 mF
−10 10 90705030−30
1.175
1.185
1.195
1.205
1.215
IOUT = 10 mA
IOUT = 300 mA
VIN = 3.8 V
VOUT = 2.8 V
CIN = 1 mF
COUT = 1 mFIOUT = 10 mA
IOUT = 300 mA
VIN = 4.3 V
VOUT = 3.3 V
CIN = 1 mF
COUT = 1 mF
806040200−20−40 −10 10 90705030−30
1.780
1.795
1.805
1.810
1.815
1.820
806040200−20−40 −10 10 90705030−30 806040200−20−40 −10 10 90705030−30
3.300
3.270
3.285
2.775
2.795
2.810
806040200−20−40 −10 10 90705030−30 806040200−20−40 −10 10 90705030−30
VIN = VOUT_NOM + 0.5 to 5.5 V
VOUT = 1.8 V
CIN = 1 mF
COUT = 1 mF
VOUT = 1.2 V
0.003
−0.001
−0.002
−0.003
−0.004
−0.005
VOUT = 1.8 V
VOUT = 2.8 V
VOUT = 3.3 V
16
10
2
VIN = VOUT_NOM + 1 V
IOUT = 1 mA to 300 mA
CIN = 1 mF
COUT = 1 mF
VOUT = 1.2 V
VOUT = 1.8 V
VOUT = 2.8 V VOUT = 3.3 V
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TYPICAL CHARACTERISTICS
Figure 9. Ground Current vs. Load Current Figure 10. Quiescent Current vs. Input Voltage
VOUT = 1.8 V
IOUT, OUTPUT CURRENT (mA) VIN, INPUT VOLTAGE (V)
10001001010.10.010.001
0
100
200
300
400
500
600
5436210
0
7
21
28
35
49
56
70
Figure 11. Dropout Voltage vs. Load Current −
VOUT = 1.8 V Figure 12. Dropout Voltage vs. Load Current −
VOUT = 2.8 V
IOUT, OUTPUT CURRENT (mA) IOUT, OUTPUT CURRENT (mA)
300250200150100500
0
50
150
200
250
300
400
500
300250200150100500
0
35
105
140
210
245
280
350
Figure 13. Dropout Voltage vs. Load Current −
VOUT = 3.3 V Figure 14. Current Limit vs. Temperature
IOUT, OUTPUT CURRENT (mA) TJ, JUNCTION TEMPERATURE (°C)
300250200150100500
0
30
90
120
180
210
270
300
80604020100−20−40
520
540
580
600
640
680
700
720
IGND, GROUND CURRENT (mA)
IQ, QUIESCENT CURRENT (mA)
VDO, DROPOUT VOLTAGE (mV)
VDROP, DROPOUT VOLTAGE (mV)
VDROP, DROPOUT VOLTAGE (mV)
ICL, CURRENT LIMIT (mA)
VIN = 4.3 V
VOUT = 90% VOUT(nom)
CIN = 1 mF
COUT = 1 mF
660
620
560
−10−30 30 50 9070
VOUT = 3.3 V
CIN = 1 mF
COUT = 1 mF
meas for VOUT_NOM − 100 mV
60
150
240 TJ = 85°C
TJ = −40°C
TJ = 25°C
VOUT = 1.8 V
CIN = 1 mF
COUT = 1 mF
meas for VOUT_NOM − 100 mV
TJ = 85°C
TJ = −40°C
TJ = 25°C
VOUT = 2.8 V
CIN = 1 mF
COUT = 1 mF
meas for VOUT_NOM − 100 mV
TJ = 85°C
TJ = −40°C
TJ = 25°C
100
350
450
70
175
315
VIN = 2.8 V
VOUT = 1.8 V
IOUT = 0 mA
CIN = 1 mF
COUT = 1 mF
TJ = 85°C
TJ = −40°C
TJ = 25°C
14
42
63
TJ = 85°C
TJ = −40°C
TJ = 25°C
VIN = VOUT_NOM + 1 V
CIN = 1 mF
COUT = 1 mF
NCP115
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TYPICAL CHARACTERISTICS
Figure 15. Short Circuit Current vs.
Temperature Figure 16. Enable Thresholds Voltage
TJ, JUNCTION TEMPERATURE (°C) TJ, JUNCTION TEMPERATURE (°C)
806040200−20−40
500
520
560
580
600
640
660
700
0
0.1
0.3
0.4
0.5
0.7
0.8
1.0
Figure 17. Current to Enable Pin vs.
Temperature Figure 18. Disable Current vs. Temperature
TJ, JUNCTION TEMPERATURE (°C) TJ, JUNCTION TEMPERATURE (°C)
0
25
75
100
150
175
200
250
0
3
9
12
15
21
27
30
Figure 19. Discharge Resistance vs.
Temperature Figure 20. Maximum COUT ESR Value vs. Load
Current
TJ, JUNCTION TEMPERATURE (°C) IOUT, OUTPUT CURRENT (mA)
0
10
30
40
60
70
80
100
300250200150100500
0.1
1
10
100
ISC, SHORT CIRCUIT CURRENT (mA)IEN, ENABLE PIN CURRENT (nA)
IDIS, DISABLE CURRENT (nA)
RDIS, DISCHARGE RESISTIVITY (W)
ESR (W)
VIN = 4.3 V
VOUT = 0 V (short)
CIN = 1 mF
COUT = 1 mF
540
620
680
−10−30 10 90705030
VEN, ENABLE VOLTAGE THRESHOLD (V)
0.2
0.6
0.9
806040200−20−40 −10−30 10 90705030
VIN = 3.8 V
VOUT = 2.8 V
CIN = 1 mF
COUT = 1 mF
806040200−20−40 −10−30 10 90705030 806040200−20−40 −10−30 10 90705030
VIN = 4.3 V
VOUT = 3.3 V
CIN = 1 mF
COUT = 1 mF
50
125
225 VIN = 4.3 V
VOUT = 0 V
CIN = 1 mF
COUT = 1 mF
VEN = 1 V
6
18
24
Unstable Operation
Stable Operation
20
50
90
806040200−20−40 −10−30 10 90705030
VIN = 4.3 V
VOUT = 3.3 V
CIN = 1 mF
COUT = 1 mF
OFF → ON
ON → OFF
NCP115
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TYPICAL CHARACTERISTICS
Figure 21. Output Voltage Noise Spectral Density – VOUT = 1.2 V
FREQUENCY (Hz)
10M1M100K10K1K10010
0.001
0.01
0.1
1
10
Figure 22. Output Voltage Noise Spectral Density – VOUT = 2.8 V
FREQUENCY (Hz)
Figure 23. Output Voltage Noise Spectral Density – VOUT = 3.3 V
FREQUENCY (Hz)
NOISE SPECTRAL DENSITY (mV/√Hz)
RMS Output Noise (mVRMS)
IOUT
1 mA
10 mA
300 mA
10 Hz − 100 kHz
65.6
63.1
62.3
100 Hz − 100 kHz
61.9
59.5
60.3
RMS Output Noise (mVRMS)
IOUT
1 mA
10 mA
300 mA
10 Hz − 100 kHz
93.4
92.1
119.3
100 Hz − 100 kHz
87.9
86.6
115.6
RMS Output Noise (mVRMS)
IOUT
1 mA
10 mA
300 mA
10 Hz − 100 kHz
104.0
102.9
131.4
100 Hz − 100 kHz
98.0
96.7
127.0
10M1M100K10K1K10010
0.001
0.01
0.1
1
10
10M1M100K10K1K10010
0.001
0.01
0.1
1
10
VIN = 2.5 V
VOUT = 1.2 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
VIN = 3.8 V
VOUT = 2.8 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
VIN = 4.3 V
VOUT = 3.3 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
IOUT = 1 mA
IOUT = 10 mA
IOUT = 300 mA
IOUT = 1 mA
IOUT = 10 mA
IOUT = 300 mA
IOUT = 1 mA
IOUT = 10 mA
IOUT = 300 mA
NOISE SPECTRAL DENSITY (mV/√Hz)NOISE SPECTRAL DENSITY (mV/√Hz)
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TYPICAL CHARACTERISTICS
Figure 24. Power Supply Rejection Ratio,
VOUT = 1.2 V Figure 25. Power Supply Rejection Ratio,
VOUT = 1.8 V
FREQUENCY (Hz) FREQUENCY (Hz)
10M1M100K10K1K100
0
10
30
40
60
70
90
100
10M1M100K10K1K100
0
10
30
40
60
70
80
100
Figure 26. Power Supply Rejection Ratio,
VOUT = 2.8 V Figure 27. Power Supply Rejection Ratio,
VOUT = 3.3 V
FREQUENCY (Hz) FREQUENCY (Hz)
10M1M100K10K1K100
0
10
30
40
50
70
80
100
10M1M100K10K1K100
0
20
30
50
60
70
90
100
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
20
50
80
20
60
90
80
40
10
20
50
90
VIN = 2.5 V + 100 mVpp
VOUT = 1.2 V
CIN = none
COUT = 1 mF (MLCC)
IOUT = 1 mA
IOUT = 10 mA
IOUT = 150 mA
IOUT = 300 mA
VIN = 2.8 V + 100 mVpp
VOUT = 1.8 V
CIN = none
COUT = 1 mF (MLCC)
IOUT = 1 mA
IOUT = 10 mA
IOUT = 150 mA
IOUT = 300 mA
VIN = 3.8 V + 100 mVpp
VOUT = 2.8 V
CIN = none
COUT = 1 mF (MLCC)
IOUT = 1 mA
IOUT = 10 mA
IOUT = 150 mA
IOUT = 300 mA
VIN = 4.3 V + 100 mVpp
VOUT = 3.3 V
CIN = none
COUT = 1 mF (MLCC)
IOUT = 1 mA
IOUT = 10 mA
IOUT = 150 mA
IOUT = 300 mA
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TYPICAL CHARACTERISTICS
Figure 28. Enable Turn−on Response −
IOUT = 0 mA, Slow Option − C Figure 29. Enable Turn−on Response −
IOUT = 300 mA, Slow Option − C
Figure 30. VOUT Slew−Rate Comparison A and
C option − IOUT = 10 mA Figure 31. VOUT Slew−Rate Comparison A and
C option − IOUT = 300 mA
Figure 32. Line Transient Response −
IOUT = 10 mA Figure 33. Line Transient Response −
IOUT = 300 mA
50 ms/div 100 ms/div
500 mV/div
VEN
IINPUT
VOUT
500 mV/div
50 mA/div
50 mA/div
VIN = 2.8 V
VOUT = 1.8 V
COUT = 1 mF (MLCC)
VEN
IINPUT
VOUT
500 mV/div
500 mV/div
VIN = 2.8 V
VOUT = 1.8 V
COUT = 1 mF (MLCC)
200 ms/div 200 ms/div
500 mV/div
VEN
IINPUT
VOUT
500 mV/div
100 mA/div
100 mA/div
VIN = 2.8 V
VOUT = 1.8 V
COUT = 1 mF (MLCC)
VEN
IINPUT
VOUT
500 mV/div
500 mV/div
VIN = 2.8 V
VOUT = 1.8 V
COUT = 1 mF (MLCC)
A option C option A option C option
10 ms/div 10 ms/div
500 mV/div
VIN
3.0 V
VOUT
20 mV/div
2.0 V
500 mV/div20 mV/div
3.0 V
2.0 VVIN
VOUT
tRISE,FALL = 1 ms
VOUT = 1.2 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
VOUT = 1.2 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
tRISE,FALL = 1 ms
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TYPICAL CHARACTERISTICS
Figure 34. Line Transient Response −
IOUT = 10 mA Figure 35. Line Transient Response −
IOUT = 300 mA
Figure 36. Load Transient Response −
VOUT = 1.2 V Figure 37. Load Transient Response −
VOUT = 1.2 V
Figure 38. Load Transient Response −
VOUT = 2.8 V Figure 39. Load Transient Response −
VOUT = 2.8 V
5 ms/div 10 ms/div
100 mA/div20 mV/div
100 mA/div20 mV/div
IOUT
VOUT
tRISE = 1 msIOUT
VOUT
tFALL = 1 ms
COUT = 1 mF
10 ms/div 10 ms/div
500 mV/div
VIN
4.8 V
VOUT
3.8 V
500 mV/div20 mV/div
4.8 V
3.8 V
VIN
VOUT
tRISE,FALL = 1 ms
VOUT = 2.8 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
VOUT = 2.8 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
tRISE,FALL = 1 ms
20 mV/div
COUT = 4.7 mF
VIN = 2.5 V
VOUT = 1.2 V
CIN = 1 mF (MLCC)
IOUT = 1 mA to 300 mA
COUT = 1 mF
COUT = 4.7 mF
VIN = 2.5 V
VOUT = 1.2 V
CIN = 1 mF (MLCC)
IOUT = 1 mA to 300 mA
5 ms/div 10 ms/div
VOUT
20 mV/div
100 mA/div20 mV/div
VOUT
IOUT VIN = 3.8 V, VOUT = 2.8 V
CIN = 1 mF (MLCC)
COUT = 1 mA to 300 mA
tRISE = 1 msIOUT
VIN = 3.8 V, VOUT = 2.8 V
CIN = 1 mF (MLCC)
IOUT = 1 mA to 300 mA
tFALL = 1 ms
COUT = 1 mF
COUT = 4.7 mF
COUT = 1 mF
COUT = 4.7 mF
100 mA/div
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TYPICAL CHARACTERISTICS
Figure 40. Load Transient Response −
VOUT = 3.3 V Figure 41. Load Transient Response −
VOUT = 3.3 V
Figure 42. Turn−on/off − Slow Rising
VIN − IOUT = 10 mA Figure 43. Turn−on/off − Slow Rising
VIN − IOUT = 300 mA
5 ms/div 10 ms/div
Figure 44. Overheating Protection − TSD
5 ms/div
10 ms/div
100 mA/div
VOUT
20 mV/div
100 mA/div20 mV/div
500 mV/div
100 mV/div
IOUT
VOUT
500 mV/div
VOUT
TSD On
VOUT
IOUT VIN = 4.3 V, VOUT = 3.3 V
CIN = 1 mF (MLCC)
IOUT = 1 mA to 300 mA
tRISE = 1 msIOUT
VIN = 4.3 V, VOUT = 3.3 V
CIN = 1 mF (MLCC)
IOUT = 1 mA to 300 mA
tFALL = 1 ms
TSD Off
VIN
VIN = 3.8 V
VOUT = 3.3 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
VIN = 5.5 V, VOUT = 1.8 V
CIN = 1 mF (MLCC), COUT = 1 mF (MLCC)
COUT = 1 mF
COUT = 4.7 mF
COUT = 1 mF
COUT = 4.7 mF
10 ms/div
500 mV/div
VOUT
VIN
VIN = 3.8 V
VOUT = 2.8 V
CIN = 1 mF (MLCC)
COUT = 1 mF (MLCC)
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APPLICATIONS INFORMATION
General
The NCP115 is a high performance 300 mA Low Dropout
Linear Regulator. This device delivers very high PSRR
(over 70 dB at 1 kHz) and excellent dynamic performance
as load/line transients. In connection with very low
quiescent current this device is very suitable for various
battery powered applications such as tablets, cellular
phones, wireless and many others. The device is fully
protected in case of output overload, output short circuit
condition and overheating, assuring a very robust design.
Input Capacitor Selection (CIN)
It is recommended to connect at least a 1 mF Ceramic X5R
or X7R capacitor as close as possible to the IN pin of the
device. This capacitor will provide a low impedance path for
unwanted AC signals or noise modulated onto constant
input voltage. There is no requirement for the min. /max.
ESR of the input capacitor but it is recommended to use
ceramic capacitors for their low ESR and ESL. A good input
capacitor will limit the influence of input trace inductance
and source resistance during sudden load current changes.
Larger input capacitor may be necessary if fast and large
load transients are encountered in the application.
Output Decoupling (COUT)
The NCP115 requires an output capacitor connected as
close as possible to the output pin of the regulator. The
recommended capacitor value is 1 mF and X7R or X5R
dielectric due to its low capacitance variations over the
specified temperature range. The NCP115 is designed to
remain stable with minimum effective capacitance of
0.47 mF to account for changes with temperature, DC bias
and package size. Especially for small package size
capacitors such as 0402 the effective capacitance drops
rapidly with the applied DC bias.
There is no requirement for the minimum value of
Equivalent Series Resistance (ESR) for the COUT but the
maximum value of ESR should be less than 1.8 W. Larger
output capacitors and lower ESR could improve the load
transient response or high frequency PSRR. It is not
recommended to use tantalum capacitors on the output due
to their large ESR. The equivalent series resistance of
tantalum capacitors is also strongly dependent on the
temperature, increasing at low temperature.
Enable Operation
The NCP1 15 uses the EN pin to enable/disable its device
and to deactivate/activate the active discharge function.
If the EN pin voltage is <0.4 V the device is guaranteed to
be disabled. The pass transistor is turned−off so that there is
virtually no current flow between the IN and OUT. The
active dischar ge transistor is active so that the output voltage
VOUT is pulled to GND through a 100 W resistor. In the
disable state the device consumes as low as typ. 10 nA from
the VIN.
If the EN pin voltage >0.9 V the device is guaranteed to
be enabled. The NCP115 regulates the output voltage and
the active discharge transistor is turned−off.
The EN pin has internal pull−down current source with
typ. value of 300 nA which assures that the device is
turned−off when the EN pin is not connected. In the case
where the EN function isn’t required the EN should be tied
directly to IN.
Output Current Limit
Output Current is internally limited within the IC to a
typical 600 mA. The NCP115 will source this amount of
current measured with a voltage drops on the 90% of the
nominal VOUT. If the Output Voltage is directly shorted to
ground (VOUT = 0 V), the short circuit protection will limit
the output current to 630 mA (typ). The current limit and
short circuit protection will work properly over whole
temperature range and also input voltage range. There is no
limitation for the short circuit duration.
Thermal Shutdown
When the die temperature exceeds the Thermal Shutdown
threshold (TSD − 160°C typical), Thermal Shutdown event
is detected and the device is disabled. The IC will remain in
this state until the die temperature decreases below the
Thermal Shutdown Reset threshold (TSDU − 140°C typical).
Once the IC temperature falls below the 140°C the LDO is
enabled again. The thermal shutdown feature provides the
protection from a catastrophic device failure due to
accidental overheating. This protection is not intended to be
used as a substitute for proper heat sinking.
Power Dissipation
As power dissipated in the NCP115 increases, it might
become necessary to provide some thermal relief. 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.
The maximum power dissipation the NCP115 can handle
is given by:
PD(MAX) +ƪ85°C*TAƫ
qJA
(eq. 1)
The power dissipated by the NCP115 for given
application conditions can be calculated from the following
equations:
PD[VINǒIGND@IOUTǓ)IOUTǒVIN *VOUTǓ(eq. 2)
NCP115
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13
Figure 45. qJA and PD (MAX) vs. Copper Area (XDFN4)
0
0.05
0.1
0.15
0.2
0.3
0.35
0
100
150
250
300
350
400
0 100 200 300 400 500 600 700
PCB COPPER AREA (mm2)
qJA, JUNCTION TO AMBIENT THERMAL RESISTANCE (°C/W)
PD(MAX), MAXIMUM POWER DISSIPATION (W)
qJA, 2 oz Cu
qJA, 1 oz Cu
PD(MAX), TA = 25°C, 1 oz Cu
PD(MAX), TA = 25°C, 2 oz Cu
0.25
0.4
200
50
Figure 46. qJA and PD (MAX) vs. Copper Area (TSOP−5)
0
0.4
0.5
0.6
0.8
0.7
0.9
1.0
0
25
75
125
175
200
225
250
0 100 200 300 400 500 600 700
COPPER HEAT SPREADER AREA (mm2)
qJA, JUNCTION TO AMBIENT THERMAL RESISTANCE (°C/W)
PD(MAX), MAXIMUM POWER DISSIPATION (W)
qJA, 2 oz Cu
qJA, 1 oz Cu
PD(MAX), TA = 25°C, 1 oz Cu
PD(MAX), TA = 25°C, 2 oz Cu
0.3
0.2
0.1
150
50
100
NCP115
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Reverse Current
The PMOS pass transistor has an inherent body diode
which will be forward biased in the case that VOUT > VIN.
Due to this fact in cases, where the extended reverse current
condition can be anticipated the device may require
additional external protection.
Power Supply Rejection Ratio
The NCP115 features very good Power Supply Rejection
ratio. If desired the PSRR at higher frequencies in the range
100 kHz − 10 MHz can be tuned by the selection of COUT
capacitor and proper PCB layout.
Turn−On T ime
The turn−on time is defined as the time period from EN
assertion to the point in which VOUT will reach 98% of its
nominal value. This time is dependent on various
application conditions such as VOUT(NOM) COUT and TA.
The NCP115 provides two options of VOUT ramp−up
time. The NCP115A and NCP115B have normal slew rate,
typical 190 mV/ms and NCP115C and NCP115D provide
slower option with typical value 2 0 m V / ms which is suitable
for camera sensor and other sensitive devices.
PCB Layout Recommendations
To obtain good transient performance and good regulation
characteristics place CIN and COUT capacitors close to the
device pins and make the PCB traces wide. In order to
minimize the solution size, use 0402 capacitors. Larger
copper area connected to the pins will also improve the
device thermal resistance. The actual power dissipation can
be calculated from the equation above (Equation 2). Expose
pad should be tied the shortest path to the GND pin.
NCP115
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ORDERING INFORMATION − XDFN4 PACKAGE
Device Voltage
Option Marking Description Package Shipping
NCP115AMX100TCG 1.0 V QN
300 mA, Active Discharge,
Normal Slew−rate
XDFN4
(Pb−Free) 3000 / Tape &
Reel
NCP115AMX105TCG 1.05 V QM
NCP115AMX110TBG 1.1 V QL
NCP115AMX110TCG
NCP115AMX120TBG 1.2 V QA
NCP115AMX120TCG
NCP115AMX150TCG 1.5 V QE
NCP115AMX180TBG 1.8 V QC
NCP115AMX180TCG
NCP115AMX250TCG 2.5 V QF
NCP115AMX280TBG 2.8 V QG
NCP115AMX280TCG
NCP115AMX300TCG 3.0 V QK
NCP115AMX330TBG 3.3 V QH
NCP115AMX330TCG
NCP115AMX360TCG 3.6 V QJ
NCP115CMX100TCG 1.0 V RN
300 mA, Active Discharge,
Slow Slew−rate
NCP115CMX105TCG 1.05 V RM
NCP115CMX110TBG 1.1 V RF
NCP115CMX110TCG
NCP115CMX120TBG 1.2 V RE
NCP115CMX120TCG
NCP115CMX150TCG 1.5 V RG
NCP115CMX180TBG 1.8 V RA
NCP115CMX180TCG
NCP115CMX250TCG 2.5 V RH
NCP115CMX280TBG 2.8 V RC
NCP115CMX280TCG
NCP115CMX300TCG 3.0 V RK
NCP115CMX330TBG 3.3 V RD
NCP115CMX330TCG
NCP115CMX360TCG 3.6 V RJ
NCP115
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ORDERING INFORMATION − TSOP−5 PACKAGE
Device Voltage
Option Marking Description Package Shipping
NCP115ASN105T1G 1.05 V QAC
300 mA, Active Discharge, Normal Slew−rate TSOP−5
(Pb−Free) 3000 / Tape &
Reel
NCP115ASN110T1G 1.1 V QAD
NCP115ASN120T1G 1.2 V QAE
NCP115ASN120T2G 1.2 V QAE
NCP115ASN150T1G 1.5 V QAF
NCP115ASN150T2G 1.5 V QAF
NCP115ASN180T1G 1.8 V QAA
NCP115ASN180T2G 1.8 V QAA
NCP115ASN250T1G 2.5 V QAG
NCP115ASN250T2G 2.5 V QAG
NCP115ASN280T1G 2.8 V QAH
NCP115ASN280T2G 2.8 V QAH
NCP115ASN300T1G 3.0 V QAJ
NCP115ASN330T1G 3.3 V QAK
NCP115ASN330T2G 3.3 V QAK
NCP115CSN105T1G 1.05 V QCC
300 mA, Active Discharge, Slow Slew−rate TSOP−5
(Pb−Free) 3000 / Tape &
Reel
NCP115CSN110T1G 1.1 V QCD
NCP115CSN120T1G 1.2 V QCE
NCP115CSN150T1G 1.5 V QCF
NCP115CSN180T1G 1.8 V QCA
NCP115CSN250T1G 2.5 V QCG
NCP115CSN280T1G 2.8 V QCH
NCP115CSN300T1G 3.0 V QCJ
NCP115CSN330T1G 3.3 V QCK
NCP115
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17
PACKAGE DIMENSIONS
TSOP−5
CASE 483
ISSUE M
0.7
0.028
1.0
0.039
ǒmm
inchesǓ
SCALE 10:1
0.95
0.037
2.4
0.094
1.9
0.074
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH
THICKNESS. MINIMUM LEAD THICKNESS IS THE
MINIMUM THICKNESS OF BASE MATERIAL.
4. DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH, PROTRUSIONS, OR GATE BURRS. MOLD
FLASH, PROTRUSIONS, OR GATE BURRS SHALL NOT
EXCEED 0.15 PER SIDE. DIMENSION A.
5. OPTIONAL CONSTRUCTION: AN ADDITIONAL
TRIMMED LEAD IS ALLOWED IN THIS LOCATION.
TRIMMED LEAD NOT TO EXTEND MORE THAN 0.2
FROM BODY.
DIM MIN MAX
MILLIMETERS
A
B
C0.90 1.10
D0.25 0.50
G0.95 BSC
H0.01 0.10
J0.10 0.26
K0.20 0.60
M0 10
S2.50 3.00
123
54 S
AG
B
D
H
CJ
__
0.20
5X
CAB
T0.10
2X
2X T0.20
NOTE 5
CSEATING
PLANE
0.05
K
M
DETAIL Z
DETAIL Z
TOP VIEW
SIDE VIEW
A
B
END VIEW
1.35 1.65
2.85 3.15
NCP115
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PACKAGE DIMENSIONS
XDFN4 1.0x1.0, 0.65P
CASE 711AJ
ISSUE A
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED TERMINAL
AND IS MEASURED BETWEEN 0.15 AND
0.20 mm FROM THE TERMINAL TIPS.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
ÉÉ
ÉÉ
A
B
E
D
D2
BOTTOM VIEW
b
e
4X
NOTE 3
2X 0.05 C
PIN ONE
REFERENCE
TOP VIEW
2X 0.05 C
A
A1
(A3)
0.05 C
0.05 C
CSEATING
PLANE
SIDE VIEW
L
4X
12
DIM MIN MAX
MILLIMETERS
A0.33 0.43
A1 0.00 0.05
A3 0.10 REF
b0.15 0.25
D1.00 BSC
D2 0.43 0.53
E1.00 BSC
e0.65 BSC
L0.20 0.30
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
MOUNTING FOOTPRINT*
1.20
0.26
0.24 4X
DIMENSIONS: MILLIMETERS
0.39
RECOMMENDED
PACKAGE
OUTLINE
NOTE 4
e/2
D2
455
A
M
0.05 BC
43
0.65
PITCH
DET AIL A
4X
b2 0.02 0.12
L2 0.07 0.17
4X
0.52
2X
0.11
4X
L24X
DETAIL A
b24X
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