NCP4688
150 mA, Low Noise, LDO
Linear Voltage Regulator
The NCP4688 is a CMOS 150 mA LDO linear voltage regulator
with high output voltage accuracy which features a low noise output
voltage and high ripple rejection. The low level of output noise
10
mVrms
typically is kept at any output voltage. The very common
SOT23−5 package and small
mDFN
1x1 package are suitable for
industrial applications, portable communication equipments and RF
modules.
Features
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MARKING
DIAGRAMS
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Operating Input Voltage Range: 2 V to 5.25 V
Output Voltage Range: 1.2 to 4.8 V (available in 0.1 V steps)
±1%
Output Voltage Accuracy
Output Noise: 10
mVrms
Line Regulation: 0.02%/V
Current Limit Circuit
High PSRR: 80 dB at 1 kHz, 75 dB at 10 kHz
Available in SOT−23−5 and
mDFN
1.0 x 1.0 mm Package
These are Pb−Free Devices
XXXMM
SOT−23−5
CASE 1212
1
1
UDFN−4
CASE 517BR
1
XX
M
G
G
(Top Views)
Typical Applications
Home Appliances, Industrial Equipment
Cable Boxes, Satellite Receivers, Entertainment Systems
Car Audio Equipment, Navigation Systems
Notebook Adaptors, LCD TVs, Cordless Phones and Private LAN
Systems
•
RF Modules
VIN
VIN
C1
1.0
mF
CE
GND
NCP4688x
VOUT
C2
1.0
mF
VOUT
XX, XXX = Specific Device Code
M, MM = Date Code
G
= Pb−Free Package
(*Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
Figure 1. Typical Application Schematic
©
Semiconductor Components Industries, LLC, 2012
February, 2012
−
Rev. 1
1
Publication Order Number:
NCP4688/D
NCP4688
NCP4688xxxx
NCP4688D
Vin
Vout Vin
Vout
Vref
Noise Reduction
CE
Current Limit
GND
CE
Vref
Noise Reduction
Current Limit
GND
Figure 2. Simplified Schematic Block Diagram
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
SOT−23−5
1
2
3
4
5
1
*EP
Pin No.
DFN 1x1
4
2
3
Pin Name
VIN
GND
CE
NC
VOUT
EP
Input pin
Ground pin
Chip enable pin (“H” active)
Non connected
Output pin
Exposed Pad (leave floating or connect to GND)
Description
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
Input Voltage
Output Voltage
Chip Enable Input
Power Dissipation SOT−23−5
Power Dissipation
mDFN
1.0 x 1.0 mm
Junction Temperature
Storage Temperature
ESD Capability, Human Body Model (Note 1)
ESD Capability, Machine Model (Note 1)
T
J
T
STG
ESD
HBM
ESD
MM
Symbol
V
IN
V
OUT
V
CE
P
D
Value
0
−
6V
−0.3
to V
IN
+ 0.3
0
−
6V
420
400
−40
to 150
−55
to 125
2000
200
°C
°C
V
V
Unit
V
V
V
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. 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)
Latchup Current Maximum Rating tested per JEDEC standard: JESD78
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2
NCP4688
Table 3. THERMAL CHARACTERISTICS
Rating
Thermal Characteristics, SOT−23−5
Thermal Resistance, Junction−to−Air
Thermal Characteristics,
mDFN
1x1
Thermal Resistance, Junction−to−Air
Symbol
R
qJA
R
qJA
Value
238
250
Unit
°C/W
°C/W
Table 4. ELECTRICAL CHARACTERISTICS
Parameter
Operating Input Voltage
Output Voltage
(−40°C
≤
T
A
≤
85°C; C
IN
= C
OUT
= 1.0
mF,
unless otherwise noted. Typical values are at T
A
= +25°C.)
Test Conditions
1.2 V < Vout < 4.8 V
Ta = 25°C, Vout > 2.0 V
−40°C
< Ta < 85°C, Vout > 2.0 V
Ta = 25°C, Vout
≤
2.0 V
−40°C
< Ta < 85°C, Vout
≤
2.0 V
Output Voltage Temp.
Coefficient
Line Regulation
−40°C
< Ta < 85°C
Set Vout + 0.3 < V
IN
< 5.25 V
Set Vout + 0.5 < V
IN
< 5.0 V
2.2 < V
IN
< 5.0 V
Load Regulation
Dropout Voltage
1 mA < I
OUT
≤
150 mA
I
OUT
= 150 mA
1.2 V
≤
V
OUT
< 1.3 V
1.3 V
≤
V
OUT
< 1.4 V
1.4 V
≤
V
OUT
≤
1.5 V
1.5 V
≤
V
OUT
< 1.7 V
1.7 V
≤
V
OUT
< 2.0 V
2.0 V
≤
V
OUT
< 2.5 V
2.5 V
≤
V
OUT
< 2.8 V
2.8 V
≤
V
OUT
≤
4.8 V
Output Current
Short Current Limit
Quiescent Current
V
OUT
= 0 V
Iout = 0 mA
Vout > 4.1 V
Vout
≤
4.1 V
Standby Current
CE Pin Pull−Down Current
CE Pin Threshold Voltage
CE Input Voltage “H”
CE Input Voltage “L”
Power Supply
Rejection Ratio
V
OUT
> 4.1 V @ V
IN
= 5.25 V, f = 1 kHz
V
OUT
≤
4.1 V @ V
IN
=
f = 10 kHz
Set V
OUT
+ 1.0 V,
ΔV
IN_PK−PK
= 0.2 V,
f = 100 kHz
I
OUT
= 30 mA
I
OUT
= 30 mA, f = 10 Hz to 100 kHz
V
IN
= 4.0 V, V
CE
= 0.0 V
V
IN
= V
IN max
, V
CE
= 0 V
I
STB
I
PD
V
CEH
V
CEL
PSRR
80
75
65
V
NOISE
R
DSON
10
60
mV
rms
ohm
1.0
I
OUT
I
SC
I
Q
150
40
80
75
0.1
0.3
1.0
0.6
V
IN
0.4
dB
mA
mA
V
100
Vout > 4.1 V
1.7 V
≤
V
OUT
< 4.1 V
Vout < 1.7 V
Load
Reg
V
DO
−14
0
0.39
0.37
0.34
0.32
0.29
0.25
0.22
0.20
14
0.80
0.70
0.60
0.50
0.41
0.36
0.31
0.28
mA
mA
mA
mV
V
Line
Reg
Symbol
V
IN
V
OUT
Min
2.0
x0.99
x0.985
−20
−30
±100
0.02
0.10
Typ
Max
5.25
x1.01
x1.015
+20
+30
Unit
V
V
V
mV
mV
ppm/°C
%/V
Output Noise Voltage
Autodischarge NMOS
Resistance
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NCP4688
TYPICAL CHARACTERISTICS
1.4
Vin = 5.25 V
1.2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
Vin = 4.0 V
1.0
Vin = 3.0 V
0.8
Vin = 2.0 V
0.6
0.4
0.2
0
0
50
100
150
200
250
2.5
Vin = 4.0 V
2.0
Vin = 3.0 V
1.5
Vin = 2.8 V
1.0
0.5
0
3.0
Vin = 5.25 V
0
50
100
150
200
250
300
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
Figure 3. Output Voltage vs. Output Current
NCP4688xx12
4.5
4.0
OUTPUT VOLTAGE (V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
50
100
150
200
250
300
Vin = 4.3 V
Vin = 4.5 V
Vin = 4.8 V
OUTPUT VOLTAGE (V)
Vin = 5.25 V
1.4
1.2
1.0
0.8
0.6
Figure 4. Output Voltage vs. Output Current
NCP4688xx25
Iout = 1 mA
0.4
Iout = 30 mA
0.2
0
Iout = 50 mA
0
1
2
3
4
5
6
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
Figure 5. Output Voltage vs. Output Current
NCP4688xx40
3.0
2.5
OUTPUT VOLTAGE (V)
2.0
1.5
1.0
0.5
0
Iout = 1 mA
Iout = 30 mA
Iout = 50 mA
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
Figure 6. Output Voltage vs. Input Voltage
NCP4688xx12
Iout = 1 mA
Iout = 30 mA
Iout = 50 mA
1
2
3
4
5
6
INPUT VOLTAGE (V)
Figure 7. Output Voltage vs. Input Voltage
NCP4688xx25
Figure 8. Output Voltage vs. Input Voltage
NCP4688xx40
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NCP4688
TYPICAL CHARACTERISTICS
80
70
SUPPLY CURRENT (mA)
60
50
40
30
20
10
0
0
1
2
3
4
5
6
SUPPLY CURRENT (mA)
90
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 9. Supply Current vs. Input Voltage
NCP4688xx12
90
80
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
80
75
70
65
60
55
50
−50
Figure 10. Supply Current vs. Input Voltage
NCP4688xx25
−25
0
25
50
75
100
INPUT VOLTAGE (V)
TEMPERATURE (°C)
Figure 11. Supply Current vs. Input Voltage
NCP4688xx40
80
75
70
65
60
55
50
−50
80
75
70
65
60
55
50
−50
Figure 12. Supply Current vs. Temperature
NCP4688xx12
SUPPLY CURRENT (mA)
−25
0
25
50
75
100
SUPPLY CURRENT (mA)
−25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 13. Supply Current vs. Temperature
NCP4688xx25
Figure 14. Supply Current vs. Temperature
NCP4688xx40
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