NCP4680
150 mA, Low Noise Low
Dropout Regulator
The NCP4680 is a CMOS linear voltage regulator with 150 mA
output current capability. The device is available in a tiny 0.8x0.8 mm
XDFN, and has high output voltage accuracy, low supply current and
high ripple rejection. The NCP4680 is easy to use and includes output
current fold−back protection. A Chip Enable function is included to
save power by lowering supply current. The line and load transient
responses are very good, making this regulator ideal for use as a power
supply for communication equipment.
Features
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MARKING
DIAGRAMS
XXX
XMM
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Operating Input Voltage Range: 1.40 V to 5.25 V
Output Voltage Range: 0.8 V to 3.6 V (available in 0.1 V steps)
Output Voltage Accuracy:
±1.0%
Supply Current: 50
mA
typical
Dropout Voltage: 0.25 V (I
OUT
= 150 mA, V
OUT
= 2.5 V)
High PSRR: 75 dB (f = 1 kHz, V
OUT
= 2.5 V)
Line Regulation: 0.02%/V Typ.
Stable with Ceramic Capacitors: 0.1
mF
or more
Current Fold Back Protection
Available in XDFN4 0.8 x 0.8 mm, SC−70, SOT23 Packages
These are Pb−Free Devices
Battery−powered Equipment
Networking and Communication Equipment
Cameras, DVRs, STB and Camcorders
Home Appliances
NCP4680x
VIN
CE
GND
VOUT
VOUT
SC−70
CASE 419A
SOT−23−5
CASE 1212
XX
M
1
XDFN4
CASE 711AB
1
XM
M
Typical Applications
XX, XXX= Specific Device Code
M, MM = Date Code
A
= Assembly Location
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
VIN
C1
100n
C2
100n
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 17 of this data sheet.
Figure 1. Typical Application Schematic
©
Semiconductor Components Industries, LLC, 2011
June, 2011
−
Rev. 1
1
Publication Order Number:
NCP4680/D
NCP4680
VIN
VOUT
VIN
VOUT
Vref
Vref
CE
Current Limit
CE
GND
Current Limit
GND
NCP4680Hxxxx
NCP4680Dxxxx
Figure 2. Simplified Schematic Block Diagram
PIN FUNCTION DESCRIPTION
Pin No.
XDFN4*
1
2
3
4
−
Pin No.
SC−70
4
3
1
5
2
Pin No.
SOT23
5
2
3
1
4
Pin Name
V
OUT
GND
CE
V
IN
NC
Output pin
Ground
Chip enable pin (Active “H”)
Input pin
No connection
Description
*Tab is GND level. (They are connected to the reverse side of this IC.
The tab is better to be connected to the GND, but leaving it open is also acceptable.
ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage (Note 1)
Output Voltage
Chip Enable Input
Output Current
Power Dissipation XDFN0808
Power Dissipation SC−70
Power Dissipation SOT23
Junction Temperature
Storage Temperature
ESD Capability, Human Body Model (Note 2)
ESD Capability, Machine Model (Note 2)
T
J
T
STG
ESD
HBM
ESD
MM
P
D
Symbol
V
IN
V
OUT
V
CE
I
OUT
Value
6.0
−0.3
to V
IN
+ 0.3
6.0
180
286
380
420
−40
to 150
−55
to 125
2000
200
°C
°C
V
V
Unit
V
V
V
mA
mW
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. 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)
Latch−up Current Maximum Rating tested per JEDEC standard: JESD78.
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2
NCP4680
THERMAL CHARACTERISTICS
Rating
Thermal Characteristics, XDFN 0.8 x 0.8 mm
Thermal Resistance, Junction−to−Air
Thermal Characteristics, SOT23
Thermal Resistance, Junction−to−Air
Thermal Characteristics, SC−70
Thermal Resistance, Junction−to−Air
Symbol
R
qJA
R
qJA
R
qJA
Value
350
238
263
Unit
°C/W
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
−40°C
≤
T
A
≤
85°C; V
IN
= V
OUT(NOM)
+ 1 V or 2.5 V, whichever is greater; I
OUT
= 1 mA, C
IN
= C
OUT
= 0.1
mF,
unless otherwise noted.
Typical values are at T
A
= +25°C.
Parameter
Operating Input Voltage
Output Voltage
T
A
= +25
°C
−40°C
≤
T
A
≤
85°C
Output Voltage Temp. Coefficient
Line Regulation
Load Regulation
Dropout Voltage
−40°C
≤
T
A
≤
85°C
V
OUT
≥
1.8 V
V
OUT
< 1.8 V
V
OUT
≥
1.8 V
V
OUT
< 1.8 V
V
OUT
≥
1.8 V
V
OUT
< 1.8 V
V
OUT(NOM)
+ 0.5 V
≤
V
IN
≤
5.25 V, V
IN
≥
1.4 V
I
OUT
= 1 mA to 150 mA
I
OUT
= 150 mA
V
OUT
= 0.8 V
V
OUT
= 0.9 V
1.0 V
≤
V
OUT
< 1.2 V
1.2 V
≤
V
OUT
< 1.4 V
1.4 V
≤
V
OUT
< 1.8 V
1.8 V
≤
V
OUT
< 2.1 V
2.1 V
≤
V
OUT
< 2.5 V
2.5 V
≤
V
OUT
< 3.0 V
3.0 V
≤
V
OUT
< 3.6 V
Output Current
Short Current Limit
Quiescent Current
Standby Current
CE Pin Threshold Voltage
CE Pull Down Current
Power Supply Rejection Ratio
Output Noise Voltage
V
IN
= V
OUT
+ 1 V,
DV
IN
= 0.2 V
pk−pk
,
I
OUT
= 30 mA, f = 1 kHz
f = 10 Hz to 100 kHz,
I
OUT
= 30 mA
V
OUT
≥
1.8 V
V
OUT
< 1.8 V
Low Output N−channel Tr. On Res-
istance
Minimum Start−up Equivalent Res-
istance
V
IN
= 4 V, V
CE
= 0 V
V
OUT
≤
1.8 V (Note 3)
V
OUT
> 1.8 V
3. See Current Limit paragraph in application part for explanation.
R
LOW
R
SUMIN
V
CE
= 0 V, T
A
= 25°C
CE Input Voltage “H”
CE Input Voltage “L”
V
OUT
= 0 V
I
OUT
I
SC
I
Q
I
STB
V
CEH
V
CEL
I
CEPD
PSRR
V
N
0.3
75
20 x
V
OUT
40 x
V
OUT
60
13 *
V
OUT
6.7 *
V
OUT
W
W
1.0
0.4
mA
dB
mV
rms
150
40
50
0.1
70
1.0
Line
Reg
Load
Reg
V
DO
DV
OUT
/DT
A
Test Conditions
Symbol
V
IN
V
OUT
Min
1.40
x0.99
−18
x0.985
−50
±30
±100
0.02
5
0.70
0.62
0.56
0.47
0.39
0.33
0.28
0.25
0.23
0.10
30
1.00
0.91
0.82
0.67
0.54
0.48
0.40
0.35
0.32
mA
mA
mA
mA
V
%/V
mV
V
Typ
Max
5.25
x1.01
18
x1.015
50
Unit
V
V
mV
V
mV
ppm/°C
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NCP4680
TYPICAL CHARACTERISTICS
0.9
0.8
0.7
0.6
V
OUT
(V)
0.5
0.4
0.3
0.2
0.1
0.0
0
50
100
150
200
I
OUT
(mA)
250
300
350
3.8 V
4.8 V
V
IN
= 1.4 V
1.5 V
V
OUT
(V)
1.8 V
1.6 V
2.8 V
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
50
100
150 200 250
I
OUT
(mA)
300
350
400
V
IN
= 2.2 V
2.8 V
3.8 V
5.25 V
4.8 V
Figure 3. Output Voltage vs. Output Current
0.8 V Version (T
J
= 255C)
3.0
2.5
2.0
V
OUT
(V)
3.5 V
1.5
1.0
0.5
0.0
V
OUT
(V)
V
IN
= 3 V
3.2 V
5.25 V
4.5 V
3.0
2.5
2.0
1.5
1.0
0.5
0
50
100
150
200
I
OUT
(mA)
250
300
350
0.0
0
3.5
Figure 4. Output Voltage vs. Output Current
1.8 V Version (T
J
= 255C)
V
IN
= 3.5 V
5.25 V
4.5 V
3.6 V
50
100
150
200
I
OUT
(mA)
250
300
350
Figure 5. Output Voltage vs. Output Current
2.8 V Version (T
J
= 255C)
0.8
0.7
0.6
V
DO
(V)
0.5
0.4
0.3
0.2
0.1
0
0
25
50
75
I
OUT
(mA)
100
125
150
25°C
−40°C
T
J
= 85°C
V
DO
(V)
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
Figure 6. Output Voltage vs. Output Current
3.3 V Version (T
J
= 255C)
T
J
= 85°C
25°C
−40°C
25
50
75
I
OUT
(mA)
100
125
150
Figure 7. Dropout Voltage vs. Output Current
0.8 V Version
Figure 8. Dropout Voltage vs. Output Current
1.8 V Version
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NCP4680
TYPICAL CHARACTERISTICS
0.30
0.25
0.20
V
DO
(V)
0.15
25°C
0.10
0.05
0
−40°C
0.30
0.25
0.20
V
DO
(V)
0.15
0.10
0.05
0
25°C
−40°C
T
J
= 85°C
T
J
= 85°C
0
25
50
Figure 9. Dropout Voltage vs. Output Current
2.8 V Version
0.85
0.84
0.83
0.82
V
OUT
(V)
0.80
0.79
0.78
0.77
0.76
0.75
−40
−20
0
20
40
60
80
V
OUT
(V)
0.81
V
IN
= 1.8 V
1.85
1.84
1.83
1.82
1.81
1.80
1.79
1.78
1.77
1.76
75
I
OUT
(mA)
100
125
150
0
25
50
Figure 10. Dropout Voltage vs. Output Current
3.3 V Version
V
IN
= 2.8 V
75
I
OUT
(mA)
100
125
150
1.75
−40
−20
0
20
40
60
80
T
J
, JUNCTION TEMPERATURE (°C)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 11. Output Voltage vs. Temperature,
0.8 V Version
2.85
2.84
2.83
2.82
V
OUT
(V)
2.80
2.79
2.78
2.77
2.76
2.75
−40
−20
0
20
40
60
80
V
OUT
(V)
2.81
V
IN
= 3.8 V
3.35
3.34
3.33
3.32
3.31
3.30
3.29
3.28
3.27
3.26
3.25
−40
Figure 12. Output Voltage vs. Temperature,
1.8 V Version
V
IN
= 4.3 V
−20
0
20
40
60
80
T
J
, JUNCTION TEMPERATURE (°C)
T
J
, JUNCTION TEMPERATURE (°C)
Figure 13. Output Voltage vs. Temperature,
2.8 V Version
Figure 14. Output Voltage vs. Temperature,
3.3 V Version
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