Low Dropout Regulator,
Ultra High Accuracy, Low
Iq, 500 mA with Power
Good
NCP3337
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The NCP3337 is a high performance, low dropout regulator. With
accuracy of ±0.9% over line and load and ultra−low quiescent current
and noise it encompasses all of the necessary features required by
today’s consumer electronics. This unique device is guaranteed to be
stable without a minimum load current requirement and stable with
any type of capacitor as small as 1.0 mF. The NCP3337 also comes
equipped with sense and noise reduction pins to increase the overall
utility of the device. The NCP3337 offers reverse bias protection.
DFN10
MN SUFFIX
CASE 485C
MARKING DIAGRAM
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
High Accuracy Over Line and Load (±0.9% at 25°C)
Ultra−Low Dropout Voltage at Full Load (260 mV typ)
No Minimum Output Current Required for Stability
Low Noise (33 mVrms w/10 nF Cnr and 52 mVrms w/out Cnr)
Low Shutdown Current (< 1 mA)
Reverse Bias Protected
2.9 V to 12 V Supply Range
Thermal Shutdown Protection
Current Limitation
Requires Only 1.0 mF Output Capacitance for Stability
Stable with Any Type of Capacitor (including MLCC)
Available in 1.8 V, 2.5 V, 3.3 V, 5.0 V and Adjustable Output
Voltages
Power Good Output
These are Pb−Free Devices
1
P3337
xxx
ALYWG
G
Pin 1, 2. Vout
3. Sense / ADJ
4. GND
5. PWRG
6. NC
7. NR
8. SD
9, 10. Vin
EP, GND
xxx = Specific Device Marking
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W = Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 15 of this data sheet.
Applications
•
•
•
•
•
•
•
•
PCMCIA Card
Cellular Phones
Camcorders and Cameras
Networking Systems, DSL/Cable Modems
Cable Set−Top Box
MP3/CD Players
DSP Supply
Displays and Monitors
© Semiconductor Components Industries, LLC, 2011
September, 2020 − Rev. 2
1
Publication Order Number:
NCP3337/D
NCP3337
ON
7
6
OFF
8
9
10
Vin
Cnr
(Optional)
NR
NC
SD
SENSE
IN
OUT
IN
OUT
+
Cin
1.0 mF
3
2
Cout
1.0 mF
GND
R1 PWRG EP
100k 5
EP
Vout
1
4
+
PWRG
Figure 1. Typical Fixed Version Application Schematic
ON
7
6
OFF
8
9
10
Vin
Cnr
(Optional)
NR
NC
SD
ADJ
IN
OUT
IN
OUT
+
Cin
1.0 mF
R1 PWRG EP
100k 5
EP
GND
4
R2
3
2
R3
1
Vout
Cout
1.0 mF
+
PWRG
Figure 2. Typical Adjustable Version Application Schematic
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2
NCP3337
Comp.
PWRG
Vin
SD
Enable
Block
Voltage
Reference
Current and
Thermal
Protection
Circuit
NR
Error
Amplifier
Series Pass
Element with
Reverse Bias
Protection
Vout
ADJ
NCP3337 Adjustable
GND
Figure 3. Block Diagram, Adjustable Output Version
Comp.
PWRG
Vin
SD
Enable
Block
Voltage
Reference
Current and
Thermal
Protection
Circuit
NR
Error
Amplifier
Series Pass
Element with
Reverse Bias
Protection
Vout
SENSE
NCP3337 Fix
GND
Figure 4. Block Diagram, Fixed Output Version
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NCP3337
PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
1, 2
Vout
Description
3
SENSE/ADJ
4
GND
5
PWRG
6
NC
Not Connected
7
NR
Noise Reduction Pin. This is an optional pin used to further reduce noise.
8
SD
Shutdown pin. When not in use, this pin should be connected to the input pin.
9, 10
Vin
Power Supply Input Voltage
EPAD
EPAD
Regulated output voltage. Bypass to ground with Cout w 1.0 mF
For output voltage sensing, connect to Pins 1 and 2.at Fixed output Voltage version
Adjustable pin at Adjustable output version
Power Supply Ground
Power Good
Exposed thermal pad should be connected to ground.
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Voltage
Vin
−0.3 to +16
V
Output Voltage
Vout
−0.3 to Vin +0.3 or 10 V*
V
PWRG Pin Voltage
VPWRG
−0.3 to +16
V
Shutdown Pin Voltage
Vsh
−0.3 to +16
V
Junction Temperature Range
TJ
−40 to +150
°C
Storage Temperature Range
Tstg
−50 to +150
°C
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.
NOTE: This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM) JESD 22−A114−B
Machine Model (MM) JESD 22−A115−A
*Which ever is less. Reverse bias protection feature valid only if (Vout − Vin) ≤ 7 V.
THERMAL CHARACTERISTICS
Test Conditions (Typical Value)
Min Pad Board (Note 1)
1, Pad Board (Note 1)
Unit
Junction−to−Air, qJA
215
66
°C/W
Junction−to−Pin, J−L4
58
18
°C/W
Characteristic
1. As mounted on a 35 x 35 x 1.5 mm FR4 Substrate, with a single layer of a specified copper area of 2 oz (0.07 mm thick) copper traces and
heat spreading area. JEDEC 51 specifications for a low and high conductivity test board recommend a 2 oz copper thickness. Test conditions
are under natural convection or zero air flow.
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NCP3337
ELECTRICAL CHARACTERISTICS − 5 V (Vout = 5.0 V typical, Vin = 5.4 V, TA = −40°C to +85°C, unless otherwise noted, Note 2)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 5.4 V to 7.3 V, Iload = 0.1 mA to 500 mA, TA = 25°C
Vout
−0.90%
4.955
5
0.90%
5.045
V
Output Voltage (Accuracy)
Vin = 5.4 V to 7.3 V, Iload = 0.1 mA to 500 mA, TA = 0°C to +85°C
Vout
−1.40%
4.930
5
1.40%
5.070
V
Output Voltage (Accuracy)
Vin = 5.4 V to 7.3 V, Iload = 0.1 mA to 500 mA, TA = −40°C to +125°C
Vout
−1.50%
4.925
5
1.50%
5.075
V
Line Regulation
Vin = 5.4 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 5.4 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See Application Note)
Iload = 500 mA
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
VDO
Peak Output Current (See Figure 14)
Ipk
Short Output Current (See Figure 14) Vin < 7 V, TA = 25°C
Isc
Thermal Shutdown / Hysteresis
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 4)
Iload = 300 mA (Note 4)
Iload = 50 mA
Iload = 0.1 mA
In Dropout
Vin = 3.2 V, Iload = 0.1 mA
In Shutdown
VSD = 0 V
IGND
340
230
110
10
500
700
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
830
mA
930
mA
160/10
9
4.6
0.8
−
Vnoise
mV
°C
14
7.5
2.5
220
mA
500
mA
1
mA
mA
mVrms
93
58
Power Good Voltage
Low Threshold
Hysteresis
High Threshold
Velft
Power Good Pin Voltage Saturation (Ief = 1.0 mA)
Vefdo
200
mV
Power Good Pin Leakage
Iefleak
1
mA
tef
50
ms
Power Good Blanking Time (Note 3)
93
95
2
97
% of
Vout
99
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
VSD
V
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
ISD
0.07
1
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 5 V)
IOUTR
10
2
0.4
mA
2. Performance guaranteed over the operating temperature range by design and/or characterization, production tested at TJ = TA = 25°C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
3. Can be disabled per customer request.
4. TA must be greater than 0°C.
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NCP3337
ELECTRICAL CHARACTERISTICS − 3.3 V (Vout = 3.3 V typical, Vin = 3.7 V, TA = −40°C to +85°C, unless otherwise noted,
Note 5)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 3.7 V to 7.3 V, Iload = 0.1 mA to 500 mA, TA = 25°C
Vout
−0.90%
3.270
3.3
0.90%
3.330
V
Output Voltage (Accuracy)
Vin = 3.7 V to 7.3 V, Iload = 0.1 mA to 500 mA, TA = 0°C to +85°C
Vout
−1.40%
3.254
3.3
1.40%
3.346
V
Output Voltage (Accuracy)
Vin = 3.7 V to 7.3 V, Iload = 0.1 mA to 500 mA, TA = −40°C to +125°C
Vout
−1.50%
3.250
3.3
1.50%
3.350
V
Line Regulation
Vin = 3.7 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 3.7 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See Application Note)
Iload = 500 mA
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
VDO
Peak Output Current (See Figure 14)
Ipk
Short Output Current (See Figure 14) Vin < 7 V, TA = 25°C
Isc
Thermal Shutdown / Hysteresis
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 7)
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
In Dropout
Vin = 3.7 V, Iload = 0.1 mA
In Shutdown
VSD = 0 V
IGND
500
700
IGNDsh
Vnoise
Power Good Voltage
Low Threshold
Hysteresis
High Threshold
Velft
Power Good Pin Voltage Saturation (Ief = 1.0 mA)
Vefdo
Power Good Pin Leakage
Power Good Blanking Time (Note 6)
800
mA
900
mA
160/10
9
4.6
0.8
−
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
mV
340
230
110
10
°C
14
7.5
2.5
220
mA
500
mA
1
mA
mVrms
69
46
93
95
2
97
mA
% of
Vout
99
200
mV
Iefleak
1
mA
tef
50
ms
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
VSD
V
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
ISD
0.07
1
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 3.3 V)
IOUTR
10
2
0.4
mA
5. Performance guaranteed over the operating temperature range by design and/or characterization, production tested at TJ = TA = 25°C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
6. Can be disabled per customer request.
7. TA must be greater than 0°C.
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NCP3337
ELECTRICAL CHARACTERISTICS − 2.5 V (Vout = 2.5 V typical, Vin = 2.9 V, TA = −40°C to +85°C, unless otherwise noted, Note 8)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 2.9 V to 6.5 V, Iload = 0.1 mA to 500 mA, TA = 25°C
Vout
−0.9%
2.477
2.5
+0.9%
2.523
V
Output Voltage (Accuracy)
Vin = 2.9 V to 6.5 V, Iload = 0.1 mA to 500 mA, TA = 0°C to +85°C
Vout
−1.4%
2.465
2.5
+1.4%
2.535
V
Output Voltage (Accuracy)
Vin = 2.9 V to 6.5 V, Iload = 0.1 mA to 500 mA, TA = −40°C to +125°C
Vout
−1.5%
2.462
2.5
+1.5%
2.538
V
Minimum Input Voltage
Vinmin
2.9
V
Line Regulation
Vin = 2.9 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 2.9 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See Figure 10)
Iload = 500 mA (Note 9)
Iload = 300 mA (Note 9)
Iload = 50 mA
Iload = 0.1mA
VDO
Peak Output Current (See Figures 14 and 18)
Ipk
Short Output Current (See Figure 14) Vin < 7 V, TA = 25°C
Isc
Thermal Shutdown / Hysteresis
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 9)
Iload = 300 mA (Note 9)
Iload = 50 mA
Iload = 0.1 mA
mV
340
230
110
10
500
700
800
mA
900
mA
160/10
°C
IGND
9.0
4.6
0.8
−
In Dropout
Vin = 2.4 V, Iload = 0.1 mA
In Shutdown
VSD = 0 V
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Vnoise
14
7.5
2.5
220
mA
500
mA
1.0
mA
56
35
mA
mVrms
mVrms
Power Good Voltage
Low Threshold
Hysteresis
High Threshold
Velft
Power Good Pin Voltage Saturation (Ief − 1.0 mA)
Vefdo
200
mV
Power Good Pin Leakage
Iefleak
1.0
mA
tef
50
ms
Power Good Blanking Time (Note 10)
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
VSD
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
ISD
Output Current In Shutdown Mode, Vout = 0 V
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 2.5 V)
93
95
2
97
2.0
% of
Vout
99
0.4
V
V
0.07
1.0
mA
IOSD
0.07
1.0
mA
IOUTR
10
mA
8. Performance guaranteed over the operating temperature range by design and/or characterization, production tested at TJ = TA = 25°C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
9. TA must be greater than 0°C.
10. Can be disabled per customer request.
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NCP3337
ELECTRICAL CHARACTERISTICS − 1.8 V (Vout = 1.8 V typical, Vin = 2.9 V, TA = −40°C to +85°C, unless otherwise noted, Note 11)
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (Accuracy)
Vin = 2.9 V to 5.8 V, Iload = 0.1 mA to 500 mA, TA = 25°C
Vout
−0.9%
1.783
1.8
+0.9%
1.817
V
Output Voltage (Accuracy)
Vin = 2.9 V to 5.8 V, Iload = 0.1 mA to 500 mA, TA = 0°C to +85°C
Vout
−1.4%
1.774
1.8
+1.4%
1.826
V
Output Voltage (Accuracy)
Vin = 2.9 V to 5.8 V, Iload = 0.1 mA to 500 mA, TA = −40°C to +125°C
Vout
−1.5%
1.773
1.8
+1.5%
1.827
V
Minimum Input Voltage
Vinmin
2.9
V
Line Regulation
Vin = 2.9 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 2.9 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See Figure 9)
Iload = 500 mA (Notes 12, 13)
Iload = 300 mA (Notes 12, 13)
Iload = 50 mA (Notes 12, 13)
VDO
Peak Output Current (See Figures 14 and 17)
Ipk
Short Output Current (See Figure 14) Vin < 7 V, TA = 25°C
Isc
Thermal Shutdown / Hysteresis
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 12)
Iload = 300 mA (Note 12)
Iload = 50 mA
Iload = 0.1 mA
IGND
500
700
In Dropout
Vin = 2.2 V, Iload = 0.1 mA
IGNDsh
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
830
mA
900
mA
160/10
9.0
4.6
0.8
−
In Shutdown
VSD = 0 V
mV
620
230
95
Vnoise
°C
14
7.5
2.5
220
mA
500
mA
1.0
mA
52
33
mA
mVrms
mVrms
Power Good Voltage
Low Threshold
Hysteresis
High Threshold
Velft
Power Good Pin Voltage Saturation (Ief − 1.0 mA)
Vefdo
200
mV
Power Good Pin Leakage
Iefleak
1.0
mA
tef
50
ms
Power Good Blanking Time (Note 10)
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
VSD
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
93
95
2
97
2.0
% of
Vout
99
0.4
V
V
ISD
0.07
1.0
mA
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
1.0
mA
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = 1.8 V)
IOUTR
10
mA
11. Performance guaranteed over the operating temperature range by design and/or characterization, production tested at TJ = TA = 25°C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
12. TA must be greater than 0°C.
13. Maximum dropout voltage is limited by minimum input voltage Vin = 2.9 V recommended for guaranteed operation.
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NCP3337
ELECTRICAL CHARACTERISTICS − ADJUSTABLE (Vout = 1.25 V typical, Vin = 2.9 V, TA = −40°C to +85°C, unless otherwise
noted, Note 14)
Characteristic
Symbol
Min
Typ
Max
Unit
Reference Voltage (Accuracy)
Vin = 2.9 V to Vout +4.0 V, Iload = 0.1 mA to 500 mA, TA = 25°C
Vref
−0.90%
1.239
1.25
0.90%
1.261
V
Reference Voltage (Accuracy)
Vin = 2.9 V to Vout + 4.0 V, Iload = 0.1 mA to 500 mA, TA = 0°C to +85°C
Vref
−1.40%
1.233
1.25
1.40%
1.268
V
Reference Voltage (Accuracy) (Note 18)
Vin = 2.9 V to Vout + 4.0 V, Iload = 0.1 mA to 500 mA, TA = −40°C to
+125°C
Vref
−1.50%
1.231
1.25
1.50%
1.269
V
Line Regulation
Vin = 2.9 V to 12 V, Iload = 0.1 mA
LineReg
0.04
mV/V
Load Regulation
Vin = 2.9 V to 12 V, Iload = 0.1 mA to 500 mA
LoadReg
0.04
mV/mA
Dropout Voltage (See Application Note) (Vout = 2.5 V − 10 V)
Iload = 500 mA (Note 16)
Iload = 300 mA
Iload = 50 mA
Iload = 0.1 mA
VDO
Peak Output Current (See Figure 14)
Ipk
Short Output Current (See Figure 14) Vin < 7 V, TA = 25°C
Vout v 3.3 V
Vout > 3.3 V
Isc
Thermal Shutdown / Hysteresis
TJ
Ground Current
In Regulation
Iload = 500 mA (Note 16)
Iload = 300 mA (Note 16)
Iload = 50 mA
Iload = 0.1 mA
In Dropout
Vin = Vout + 0.1 V or 2.9 V (whichever is higher), Iload = 0.1 mA
In Shutdown
VSD = 0 V
Output Noise
Cnr = 0 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
Cnr = 10 nF, Iload = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF
500
700
830
900
930
160/
10
mA
mA
°C
IGND
9
4.6
0.8
IGNDsh
Vnoise
Power Good Voltage
Low Threshold
Hysteresis
High Threshold
Velft
Power Good Pin Voltage Saturation (Ief = 1.0 mA)
Vefdo
Power Good Pin Leakage
Power Good Pin Blanking Time (Note 15)
mV
340
230
110
10
14
7.5
2.5
220
mA
500
mA
1
mA
mVrms
69
46
93
95
2
97
mA
% of
Vout
99
200
mV
Iefleak
1
mA
tef
50
ms
Shutdown
Threshold Voltage ON
Threshold Voltage OFF
VSD
SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin
Vin v 5.4 V
Vin > 5.4 V
ISD
V
2
0.4
0.07
1
5
1
Output Current In Shutdown Mode, Vout = 0 V
IOSD
0.07
Reverse Bias Protection, Current Flowing from the Output Pin to GND
(Vin = 0 V, Vout_forced = Vout (nom) v 7 V) (Note 17)
IOUTR
1
mA
mA
mA
14. Performance guaranteed over the operating temperature range by design and/or characterization, production tested at TJ = TA = 25°C. Low
duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.
15. Can be disabled per customer request.
16. TA must be greater than 0°C.
17. Reverse bias protection feature valid only if Vout − Vin ≤ 7 V.
18. For output current capability for TA < 0°C, please refer to Figures 17 and 18.
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NCP3337
2.52
VIN = 2.9 V
IOUT = 0
1.84
1.83
VOUT, OUTPUT VOLTAGE (V)
VOUT, OUTPUT VOLTAGE (V)
1.85
1.82
1.81
1.8
VOUT = 1.8 V
1.79
1.78
1.77
2.51
2.505
2.5
1.75
−40
2.49
2.485
2.48
−20
0
20
40
60
80
100
120
2.47
−40
140
0
20
40
60
80
100
120
140
TA, TEMPERATURE (°C)
Figure 5. Output Voltage vs. Temperature
1.8 V Version
Figure 6. Output Voltage vs. Temperature
2.5 V Version
5.1
3.310
VOUT, OUTPUT VOLTAGE (V)
VIN = 3.7 V
IOUT = 0
3.315
VOUT, OUTPUT VOLTAGE (V)
−20
TA, TEMPERATURE (°C)
3.320
3.305
3.300
VOUT = 3.3 V
3.295
3.290
3.285
3.280
3.275
3.270
−40
−20
0
20
40
60
80
100
120
VIN = 5.4 V
IOUT = 0
5.05
5
VOUT = 5.0 V
4.95
4.9
4.85
−40
140
−20
0
20
40
60
80
100
120
140
TA, TEMPERATURE (°C)
TA, TEMPERATURE (°C)
Figure 7. Output Voltage vs. Temperature 3.3 V
Version
Figure 8. Output Voltage vs. Temperature 5.0 V
Version
900
400
800
VDO, DROPOUT VOLTAGE (mV)
VDO, DROPOUT VOLTAGE (mV)
VOUT = 2.5 V
2.495
2.475
1.76
700
600
500 mA
500
400
300 mA
300
200
50 mA
100
0
VIN = 2.9 V
IOUT = 0
2.515
0
20
40
60
80
100
120
350
300
300 mA
200
150
50 mA
100
50
0
140
500 mA
250
0
20
40
60
80
100
120
140
TA, TEMPERATURE (°C)
TA, TEMPERATURE (°C)
Figure 9. Dropout Voltage vs. Temperature
1.8 V Version
Figure 10. Dropout Voltage vs. Temperature
2.5 V Version
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NCP3337
350
VDO, DROPOUT VOLTAGE (mV)
VDO, DROPOUT VOLTAGE (mV)
400
350
300
500 mA
250
300 mA
200
150
50 mA
100
50
0
0
20
40
60
80
100
120
300
500 mA
250
300 mA
200
150
50 mA
100
50
0
140
0
20
40
60
80
100
120
140
TA, TEMPERATURE (°C)
TA, TEMPERATURE (°C)
Figure 11. Dropout Voltage vs. Temperature
3.3 V Version
Figure 12. Dropout Voltage vs. Temperature
5.0 V Version
1000
900
700
Ipk
600
Vout (V)
Ipk (mA), Isc (mA)
0.97 Vout
Isc
800
500
400
300
200
VIN = 2.9 V
VOUT = 1.8 V
100
0
0
20
40
60
80
100
120
Ipk
Isc
Iout (mA)
(For specific values of Ipk and Isc, please refer to Figure 13)
140
TA, TEMPERATURE (°C)
Figure 13. Peak and Short Current
vs. Temperature
Figure 14. Output Voltage vs. Output Current
12
VIN = 2.9 V
VOUT = 1.8 V
10
IGND, GROUND CURRENT (mA)
IGND, GROUND CURRENT (mA)
12
500 mA
8
6
300 mA
4
2
0
0
50 mA
20
40
60
80
100
TA, TEMPERATURE (°C)
120
8
6
4
2
0
140
VIN = 2.9 V
VOUT = 1.8 V
TA = 25°C
10
0
0.1
0.2
0.3
0.4
IOUT, OUTPUT CURRENT (A)
Figure 15. Ground Current vs. Temperature
Figure 16. Ground Current vs. Output Current
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11
0.5
NCP3337
0.8
25°C
0.7
0°C
IOUT, OUTPUT CURRENT (A)
IOUT, OUTPUT CURRENT (A)
0.8
0.6
0.5
−20°C
−40°C
0.4
0.3
0.2
VIN = 2.9 V
VOUT = 1.8 V
0.1
0.0
3.6
3.4
3.2
3
2.8
2.6
2.4
0.3
0.2
0.1
3.4
3.3
3.2
Iout = 50 mA
70
60
Iout = 0.5 A
50
40
Iout = 0.25 A
30
VIN = 2.9 V +0.5 VPP Modulation
VOUT = 1.25 V
TA = 25°C
100
2.9
2.8
1k
10k
100k
F, FREQUENCY (Hz)
70
VIN = 3.4 V +0.5 VPP Modulation
VOUT = 2.5 V
TA = 25°C
60
Iout = 50 mA
80
40
20
NOISE DENSITY (nV/√HZ)
500
Cnr = 0 nF
300
Cnr = 10 nF
VIN = 2.9 V
VOUT = 1.25 V
TA = 25°C
100
1k
10k
100k
1k
10k
100k
F, FREQUENCY (Hz)
1M
Figure 21. PSRR vs. Frequency 2.5 V Version
500
200
Iout = 0.25 A
10
600
400
Iout = 0.5 A
30
0
100
1M
2.7
50
600
0
10
3
Figure 18. Output Current Capability for the
2.5 V Version
80
100
3.1
Figure 17. Output Current Capability for the
1.8 V Version
Figure 20. PSRR vs. Frequency Adjustable
Version
NOISE DENSITY (nV/√HZ)
VIN = 2.9 V
VOUT = 2.5 V
VIN, INPUT VOLTAGE (V)
90
10
−40°C
−20°C
0.4
VIN, INPUT VOLTAGE (V)
PSRR, RIPPLE REJECTION (dB)
PSRR, RIPPLE REJECTION (dB)
0.5
90
20
0°C
0.6
0.0
3.5
2.2
100
0
25°C
0.7
400
Cnr = 0 nF
300
200
100
0
10
1M
Cnr = 10 nF
VIN = 2.9 V
VOUT = 2.5 V
TA = 25°C
100
1k
10k
100k
1M
F, FREQUENCY (Hz)
F, FREQUENCY (Hz)
Figure 22. Output Noise Density Adjustable
Version
Figure 23. Output Noise Density 2.5 V Version
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12
NCP3337
Figure 24. Power Good Activation
Figure 25. Power Good Inactivation
300
15
250
10
qJA (°C/W)
MAXIMUM ESR (W)
Vin at Data Sheet Test Conditions,
25°C, 1 mF Capacitance
Unstable Area
5.0
200
150
1 oz CF
100
2 oz CF
50
Stable Area
0
0
100
200
300
400
0
500
0
100
200
300
400
500
600
700
OUTPUT CURRENT (mA)
COPPER HEAT SPREADING AREA (mm2)
Figure 26. Stability with ESR vs. Output
Current
Figure 27. DFN10 Self−Heating Thermal
Characterstics as a Function of Copper Area
on the PCB
NOTE: Typical characteristics were measured with the same conditions as electrical characteristics.
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13
NCP3337
APPLICATIONS INFORMATION
Reverse Bias Protection
temperature is exceeded. This feature provides protection
from a catastrophic device failure due to accidental
overheating. This protection feature is not intended to be used
as a substitute to heat sinking. The maximum power that can
be dissipated, can be calculated with the equation below:
Reverse bias is a condition caused when the input voltage
goes to zero, but the output voltage is kept high either by a
large output capacitor or another source in the application
which feeds the output pin.
Normally in a bipolar LDO all the current will flow from
the output pin to input pin through the PN junction with
limited current capability and with the potential to destroy
the IC.
Due to an improved architecture, the NCP3337 can
withstand up to 7.0 V on the output pin with virtually no
current flowing from output pin to input pin, and only
negligible amount of current (tens of mA) flowing from the
output pin to ground for infinite duration.
PD +
TJ(max) * TA
RqJA
(eq. 1)
For improved thermal performance, contact the factory
for the DFN package option. The DFN package includes an
exposed metal pad that is specifically designed to reduce the
junction to air thermal resistance, RqJA.
Adjustable Operation
The output voltage can be set by using a resistor divider
as shown in Figure 2 with a range of 1.25 to 10 V. The
appropriate resistor divider can be found by solving the
equation below. The recommended current through the
resistor divider is from 10 mA to 100 mA. This can be
accomplished by selecting resistors in the kW range. As
result, the Iadj * R2 becomes negligible in the equation and
can be ignored.
Input Capacitor
An input capacitor of at least 1.0 mF, any type, is
recommended to improve the transient response of the
regulator and/or if the regulator is located more than a few
inches from the power source. It will also reduce the circuit’s
sensitivity to the input line impedance at high frequencies.
The capacitor should be mounted with the shortest possible
track length directly across the regular’s input terminals.
V out + 1.25 * (1 ) R3ńR2) ) I adj * R2
Output Capacitor
(eq. 2)
Power Good Operation
The NCP3337 remains stable with any type of capacitor
as long as it fulfills its 1.0 mF requirement. There are no
constraints on the minimum ESR and it will remain stable up
to an ESR of 5.0 W. Larger capacitor values will improve the
noise rejection and load transient response.
The Power Good pin on the NCP3337 will produce a logic
Low when it drops below the nominal output voltage. Refer
to the electrical characteristics for the threshold values at
which point the Power Good goes Low. When the NCP3337
is above the nominal output voltage, the Power Good will
remain at logic High.
The external pullup resistor needs to be connected
between Vin and the Power Good pin. A resistor of
approximately 100 kW is recommended to minimize the
current consumption. No pullup resistor is required if the
Power Good output is not being used. The Power Good does
not function during thermal shutdown and when the part is
disabled.
Noise Reduction Pin
Output noise can be greatly reduced by connecting a 10 nF
capacitor (Cnr) between the noise reduction pin and ground
(see Figure 1). In applications where very low noise is not
required, the noise reduction pin can be left unconnected.
Dropout Voltage
The voltage dropout is measured at 97% of the nominal
output voltage.
Thermal Considerations
Internal thermal limiting circuitry is provided to protect the
integrated circuit in the event that the maximum junction
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NCP3337
ORDERING INFORMATION
Nominal Output Voltage
Marking
Package
Shipping†
NCP3337MN180R2G
1.8 V
P3337 180
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3337MN250R2G
2.5 V
P3337 250
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3337MN330R2G
3.3 V
P3337 330
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3337MN500R2G
5.0 V
P3337 500
DFN10
(Pb−Free)
3000 / Tape & Reel
NCP3337MNADJR2G
Adj
P3337 ADJ
DFN10
(Pb−Free)
3000 / Tape & Reel
Device
†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.
*Please contact factory for other voltage options.
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MECHANICAL CASE OUTLINE
PACKAGE DIMENSIONS
DFN10, 3x3, 0.5P
CASE 485C
ISSUE F
SCALE 2:1
DATE 16 DEC 2021
GENERIC
MARKING DIAGRAM*
XXXXX
XXXXX
ALYWG
G
XXXXX = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
*This information is generic. Please refer to
Y
= Year
device data sheet for actual part marking.
W
= Work Week
Pb−Free indicator, “G” or microdot “G”, may
G
= Pb−Free Package
or may not be present. Some products may
(Note: Microdot may be in either location) not follow the Generic Marking.
DOCUMENT NUMBER:
DESCRIPTION:
98AON03161D
Electronic versions are uncontrolled except when accessed directly from the Document Repository.
Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.
DFN10, 3X3 MM, 0.5 MM PITCH
PAGE 1 OF 1
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