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NCP4523
CMOS 3CH−LDOs
for RF Unit
The NCP4523 Series are multi voltage regulator ICs with high
output voltage accuracy, extremely low supply current, low noise, low
ON−resistance and high ripple rejection by CMOS process. The
NCP4523 Series contain three voltage regulators. Each of these
voltage regulators in the NCP4523 Series consists of a voltage
reference unit, an error amplifier, resistors for setting output voltage, a
current limit circuit and a chip enable circuit.
The chip enable function contributes to prolong battery life. Further,
regulators in the NCP4523 Series are with low dropout voltage,
excellent load transient response and line transient response, thus the
NCP4523 series are very suitable for the power supply for hand−held
communication equipment.
The output voltage of each regulator is fixed with high accuracy by
laser trim.
Since the package for these ICs is SSOP−8, high density mounting
of the ICs on boards is possible.
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MARKING
DIAGRAM
8
SSOP−8
G SUFFIX
CASE 487
8
1
xxx
xyy
1
xxxx = Product Code
yy = Lot Number
PIN ASSIGNMENT
Features
•
•
•
•
•
•
•
•
•
Ultra−Low Supply Current
Low Standby Current
Low Dropout Voltage
High Ripple Rejection, Typical 70 dB (f = 1.0 kHz)
High Output Voltage Accuracy, "2.0%
Excellent Load Transient Response and Line Transient Response
Small Package 8−Pin SSOP
Maximum Input Voltage 6.0 V
Pb−Free Packages are Available
VOUT1
1
8
VDD
VOUT2
2
7
CE1
VOUT3
3
6
CE2
GND
4
5
CE3
(Top View)
SSOP−8
ORDERING INFORMATION
Applications
• Power Source for Cellular Phones such as GSM, CDMA and
See detailed ordering and shipping information in the package
dimensions section on page 22 of this data sheet.
Personal Handy−Phone System
• Power Source for Electrical Appliances such as Cameras, VCRs,
•
© Semiconductor Components Industries, LLC, 2005
September, 2005 − Rev. 6
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 22 of this data sheet.
Camcorders, etc.
Power Source for Battery−Powered Equipment
1
Publication Order Number:
NCP4523/D
NCP4523
PIN DESCRIPTION
Pin Number
NCP4523G
SSOP−8
Symbol
1
VOUT1
Output Pin
2
VOUT2
Output Pin
3
VOUT3
Output Pin
4
GND
Ground Pin
5
CE3
Chip Enable Pin
6
CE2
Chip Enable Pin
7
CE1
Chip Enable Pin
8
VDD
Input Pin
Description
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Voltage
VIN
7.0
V
Input Voltage (CE Pin)
CE
−0.3 X VIN + 0.3
V
Output Voltage
VOUT
−0.3 X VIN + 0.3
V
Output Current (VOUT1)
IOUT1
200
mA
Output Current (VOUT2)
IOUT2
100
mA
Output Current (VOUT3)
IOUT3
100
mA
Power Dissipation
PD
300
mW
Operating Temperature Range
Topt
−40 X 85
°C
Storage Temperature Range
Tstg
−55 X 125
°C
Electrostatic Discharge Sensitivity (ESD)
Human Body Model (HBM)
Machine Model (MM)
ESD
V
2000
200
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
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2
NCP4523
ELECTRICAL CHARACTERISTICS
VR1 (Topt = 25°C)
Characteristics
Conditions
Symbol
Output Voltage
VIN − VOUT = 1.0 V
1.0 mA v IOUT v 30 mA
VOUT
Output Current
VIN − VOUT = 1.0 V
IOUT
Load Regulation
VIN − VOUT = 1.0 V
1.0 mA v IOUT v 80 mA
Dropout Voltage
Min
Typ
Unit
−
1.02
150
−
−
mA
DVOUT/DIOUT
−
12
40
mV
Refer to Electrical Characteristic
by Output Voltage (VR1)
VDIF
−
−
−
−
Supply Current
VIN − VOUT = 1.0 V
ISS
−
70
120
mA
Supply Current (Standby)
VIN − VOUT = 1.0 V
VCE = GND
Istandby
−
0.1
1.0
mA
Line Regulation
VOUT + 0.5 V v VIN v 6.0 V
IOUT = 30 mA
DVOUT/DVIN
−
0.05
0.20
%/V
Ripple Rejection
f = 1.0 kHz, sinusoidal 0.5 Vp−p
VIN − VOUT = 1.0 V
RR
−
70
−
dB
−
VIN
−
−
6.0
V
IOUT = 50 mA
−40°C v Topt v 85°C
DVOUT/DT
−
"100
−
ppm/
°C
VOUT = 0 V
ILIM
−
50
−
mA
Input Voltage
Output Voltage Temperature
Coefficient
Short Current Limit
0.98
Max
V
CE Pull−down Resistance
−
RDN
2.5
5.0
10
MW
CE Input Voltage “H’’
−
VCEH
1.5
−
VIN
V
CE Input Voltage “L’’
−
VCEL
0.00
−
0.25
V
BW = 10 Hz − 100 kHz
en
−
60
−
mVrms
Output Noise
ELECTRICAL CHARACTERISTICS BY OUTPUT VOLTAGE (VR1)
Output Voltage
VOUT (V)
Dropout Voltage VDIF (V)
Condition
2.0 v VOUT v 2.4
2.5 v VOUT v 2.7
IOUT = 150 mA
2.8 v VOUT v 3.3
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3
Typ
Max
0.35
0.55
0.30
0.45
0.22
0.35
NCP4523
ELECTRICAL CHARACTERISTICS
VR2 (Topt = 25°C)
Characteristics
Conditions
Symbol
Output Voltage
VIN − VOUT = 1.0 V
1.0 mA v IOUT v 30 mA
VOUT
0.98
−
1.02
Output Current
VIN − VOUT = 1.0 V
IOUT
80
−
−
mA
Load Regulation
VIN − VOUT = 1.0 V
1.0 mA v IOUT v 50 mA
DVOUT/DIOUT
−
12
40
mV
Dropout Voltage
Refer to Electrical Characteristic
by Output Voltage (VR2)
VDIF
−
−
−
−
Supply Current
VIN − VOUT = 1.0 V
ISS
−
70
120
mA
Supply Current (Standby)
VIN − VOUT = 1.0 V
VCE = GND
Istandby
−
0.1
1.0
mA
Line Regulation
VOUT + 0.5 V v VIN v 6.0 V
I v = 30 mA
DVOUT/DVIN
−
0.05
0.20
V
Ripple Rejection
f = 1.0 kHz, sinusoidal 0.5 Vp−p
VIN − VOUT = 1.0 V
RR
−
70
−
dB
−
VIN
−
−
6.0
V
IOUT = 30 mA
−40°C v Topt v 85°C
DVOUT/DT
−
"100
−
ppm/
°C
VOUT = 0 V
ILIM
−
50
−
mA
Input Voltage
Output Voltage Temperature
Coefficient
Short Current Limit
Min
Typ
Max
Unit
V
CE Pull−down Resistance
−
RDN
2.5
5.0
10
MW
CE Input Voltage “H’’
−
VCEH
1.5
−
VIN
V
CE Input Voltage “L’’
−
VCEL
0.00
−
0.25
V
BW = 10 Hz − 100 kHz
en
−
60
−
mVrms
Output Noise
ELECTRICAL CHARACTERISTICS BY OUTPUT VOLTAGE (VR2)
Output Voltage
VOUT (V)
Dropout Voltage VDIF (V)
Condition
2.0 v VOUT v 2.4
2.5 v VOUT v 2.7
IOUT = 80 mA
2.8 v VOUT v 3.3
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4
Typ
Max
0.22
0.38
0.20
0.38
0.16
0.24
NCP4523
ELECTRICAL CHARACTERISTICS
VR3 (Topt = 25°C)
Characteristics
Conditions
Symbol
Output Voltage
VIN − VOUT = 1.0 V
1.0 mA v 30 mA
VOUT
0.98
−
1.02
Output Current
VIN − VOUT = 1.0 V
IOUT
80
−
−
mA
Load Regulation
VIN − VOUT = 1.0 V
1.0 mA v IOUT v 50 mA
DVOUT/DIOUT
−
12
40
mV
Dropout Voltage
Refer to Electrical Characteristic
by Dropout Voltage (VR3)
VDIF
−
−
−
−
Supply Current
VOUT + 0.5 V v VIN v 6.0 V
IOUT = 30 mA
ISS
−
70
120
mA
f = 1.0 kHz, sinusoidal 0.5 Vp−p
VIN − VOUT = 1.0 V
Istandby
−
0.1
1.0
mA
Line Regulation
−
DVOUT/DVIN
−
0.05
0.20
%/V
Ripple Rejection
IOUT = 30 mA
−40°C v Topt v 85°C
RR
−
70
−
dB
VOUT = 0 V
VIN
−
−
6.0
V
−
DVOUT/DT
−
"100
−
ppm/
°C
BW = 10 Hz − 100 kHz
ILIM
−
50
−
mA
Supply Current (Standby)
Input Voltage
Output Voltage Temperature
Coefficient
Short Current Limit
Min
Typ
Max
Unit
V
CE Pull−down Resistance
−
RDN
2.5
5.0
10
MW
CE Input Voltage “H’’
−
VCEH
1.5
−
VIN
V
CE Input Voltage “L’’
−
VCEL
0.00
−
0.25
V
Output Noise
−
en
−
60
−
mVrms
ELECTRICAL CHARACTERISTICS BY OUTPUT
VOLTAGE (VR3)
Output Voltage
VOUT (V)
Dropout Voltage VDIF (V)
Condition
2.0 v VOUT v 2.4
2.5 v VOUT v 2.7
IOUT = 80 mA
2.8 v VOUT v 3.3
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5
Typ
Max
0.24
0.38
0.22
0.28
0.16
0.24
NCP4523
VOUT1
1
R1_1
−
+
8
VDD
7
CE1
6
CE2
5
CE3
Error Amp.
Vref
R2_1
Current Limit
VOUT2
2
R1_2
−
+
Error Amp.
Vref
R2_2
Current Limit
VOUT3
3
R1_3
−
+
Error Amp.
Vref
R2_3
Current Limit
GND
4
(Pin numbers of this block diagrams are applied to NCP4523 Series)
Figure 1. Block Diagram
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6
NCP4523
VOUT1
1
R1_1
−
+
8
VDD
7
CE1
6
CE2
5
CE3
Error Amp.
Vref
R2_1
Current Limit
VOUT2
2
R1_2
−
+
Error Amp.
Vref
R2_2
Current Limit
VOUT3
3
R1_3
−
+
Error Amp.
Vref
R2_3
Current Limit
GND
4
(Pin numbers of this block diagrams are applied to NCP4523 Series)
Figure 2. Operation
Fluctuation of each regulator’s output voltage, or
VOUT1, 2, 3 is detected individually. Then it is put back to
an error amplifier through feedback resistors, or R1_1,
R2_1, R1_2, R2_2, R1_3, R2_3 and compared with a
reference voltage and compensated for the result and
make a constant voltage.
In each regulator, short protection is made with a current
limit circuit and standby mode is available by a chip enable
circuit.
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7
NCP4523
IOUT1
1 VOUT1
VDD 8
2 VOUT2
CE1 7
3 VOUT3
CE2 6
4 GND
CE3 5
C2
IOUT2
VIN
C3
IOUT3
C1
C4
C1 = 1.0 mF
C2 = C3 = C4 = 2.2 mF
Figure 3. Basic Test Circuit
IOUT1
1 VOUT1
VDD 8
2 VOUT2
CE1 7
C2
A
IOUT2
VIN
C3
IOUT3
3 VOUT3
CE2 6
4 GND
CE3 5
C1
C4
C1 = 1.0 mF
C2 = C3 = C4 = 2.2 mF
Figure 4. Test Circuit for Supply Current
IOUT1
1 VOUT1
VDD 8
2 VOUT2
CE1 7
3 VOUT3
CE2 6
4 GND
CE3 5
C1
IOUT2
C2
IOUT3
C3
C1 = C2 = C3 = 2.2 mF
Figure 5. Test Circuit for Line Transient Response
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8
P.G.
NCP4523
11a
11b
12a
1 VOUT1
VDD 8
2 VOUT2
CE1 7
3 VOUT3
CE2 6
4 GND
CE3 5
C2
VIN
C3
12b
13a
C1
C4
13b
C1 = 1.0 mF
C2 = C3 = C4 = 2.2 mF
Figure 6. Test Circuit for Load Transient Response
IOUT1
1 VOUT1
VDD 8
2 VOUT2
CE1 7
C1
IOUT2
VIN
C2
IOUT3
3 VOUT3
CE2 6
4 GND
CE3 5
C3
C1 = C2 = C3 = 2.2 mF
Figure 7. Test Circuit for Ripple Rejection
80
VR3
SUPPLY CURRENT ISS (mS)
VOUT = 3.0 V
70
VR1
VR2
60
50
40
30
20
10
0
0
1
2
3
4
5
VIN, INPUT VOLTAGE (V)
Figure 8. Supply Current vs Input Voltage
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9
6
NCP4523
3.5
3.5
VR2
3.0
VOUT, OUTPUT VOLTAGE (V)
VOUT, OUTPUT VOLTAGE (V)
VR1
5V
2.5
4V
2.0
3.5 V
1.5
VIN = 3.3 V
1.0
0.5
3.0
5V
2.5
4V
2.0
3.5 V
1.5
VIN = 3.3 V
1.0
0.5
0.0
0.0
0
0.1
0.2
0.3
0.4
0.5
0.6
0
0.3
0.4
IOUT, OUTPUT CURRENT (A)
Figure 9. Output Voltage vs. Output Current
Figure 10. Output Voltage vs. Output Current
0.5
4.0
VR3
VR1
3.0
VOUT, OUTPUT VOLTAGE (V)
VOUT, OUTPUT VOLTAGE (V)
0.2
IOUT, OUTPUT CURRENT (A)
3.5
5V
2.5
4V
2.0
3.5 V
1.5
VIN = 3.3 V
1.0
0.5
0.0
3.0
IOUT = 1 mA
2.0
IOUT = 50 mA
1.0
IOUT = 30 mA
0.0
0
0.1
0.2
0.3
0.4
0
2
1
3
4
5
IOUT, OUTPUT CURRENT (A)
VIN, INPUT VOLTAGE (V)
Figure 11. Output Voltage vs. Output Current
Figure 12. Output Voltage vs. Input Voltage
6
4.0
4.0
VR3
VOUT, OUTPUT VOLTAGE (V)
VR2
VOUT, OUTPUT VOLTAGE (V)
0.1
3.0
IOUT = 1 mA
2.0
IOUT = 30 mA
1.0
IOUT = 50 mA
3.0
IOUT = 1 mA
2.0
IOUT = 30 mA
1.0
IOUT = 50 mA
0.0
0.0
0
1
2
3
4
5
6
0
1
2
3
4
5
VIN, INPUT VOLTAGE (V)
VIN, INPUT VOLTAGE (V)
Figure 13. Output Voltage vs. Input Voltage
Figure 14. Output Voltage vs. Input Voltage
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10
6
80
80
70
70
10 kHz
100 Hz
60
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
NCP4523
50
1 kHz
40
30
VR1
IOUT = 10 mA
COUT = Tantal 2.2 mF
VOUT = 3.0 V
20
10
0
3.1
3.2
3.3
3.4
30
1 kHz
20
10
3.2
3.3
3.4
3.5
Figure 15. Ripple Rejection vs. Input Voltage
(DC Bias)
Figure 16. Ripple Rejection vs. Input Voltage
(DC Bias)
80
100 Hz
60
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
10 kHz
40
VIN, INPUT VOLTAGE (V)
10 kHz
50
1 kHz
40
30
VR2
IOUT = 10 mA
COUT = Tantal 2.2 mF
VOUT = 3.0 V
20
10
3.2
3.3
3.4
70
60
VR2
IOUT = 50 mA
COUT = Tantal 2.2 mF
VOUT = 3.0 V
100 Hz
50
10 kHz
40
30
1 kHz
20
10
0
3.1
3.5
3.2
3.3
3.4
3.5
VIN, INPUT VOLTAGE (V)
VIN, INPUT VOLTAGE (V)
Figure 17. Ripple Rejection vs. Input Voltage
(DC Bias)
Figure 18. Ripple Rejection vs. Input Voltage
(DC Bias)
80
80
100 Hz
70
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
100 Hz
VIN, INPUT VOLTAGE (V)
70
10 kHz
60
50
1 kHz
40
30
VR3
IOUT = 10 mA
COUT = Tantal 2.2 mF
VOUT = 3.0 V
20
10
0
3.1
50
0
3.1
3.5
80
0
3.1
60
VR1
IOUT = 50 mA
COUT = Tantal 2.2 mF
VOUT = 3.0 V
3.2
3.3
3.4
70
60
100 Hz
50
10 kHz
40
1 kHz
30
20
10
0
3.1
3.5
VR3
IOUT = 50 mA
COUT = Tantal 2.2 mF
VOUT = 3.0 V
3.2
3.3
3.4
VIN, INPUT VOLTAGE (V)
VIN, INPUT VOLTAGE (V)
Figure 19. Ripple Rejection vs. Input Voltage
(DC Bias)
Figure 20. Ripple Rejection vs. Input Voltage
(DC Bias)
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11
3.5
NCP4523
3.10
3.10
VOUT, OUTPUT VOLTAGE (V)
VOUT, OUTPUT VOLTAGE (V)
VR1
IOUT = 50 mA
3.05
3.00
2.95
2.90
−50
0
50
0
50
Figure 21. Output Voltage vs. Temperature
Figure 22. Output Voltage vs. Temperature
100
100
ISS, SUPPLY CURRENT (mA)
VOUT, OUTPUT VOLTAGE (V)
2.95
Topt, Topt TEMPERATURE (°C)
3.05
3.00
2.95
2.90
−50
0
50
VR1
VOUT = 3.0 V
80
60
40
20
0
−50
100
0
50
Topt, Topt TEMPERATURE (°C)
Topt, Topt TEMPERATURE (°C)
Figure 23. Output Voltage vs. Temperature
Figure 24. Supply Current vs. Temperature
100
100
100
VR2
VOUT = 3.0 V
ISS, SUPPLY CURRENT (mA)
ISS, SUPPLY CURRENT (mA)
3.00
Topt, Topt TEMPERATURE (°C)
VR3
IOUT = 10 mA
60
40
20
0
−50
3.05
2.90
−50
100
3.10
80
VR2
IOUT = 30 mA
0
50
100
80
VR3
VOUT = 3.0 V
60
40
20
0
−50
0
50
Topt, Topt TEMPERATURE (°C)
Topt, Topt TEMPERATURE (°C)
Figure 25. Supply Current vs. Temperature
Figure 26. Supply Current vs. Temperature
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12
100
NCP4523
0.25
VOUT = 3.0 V
VDF, DROPOUT VOLTAGE (V)
VDF, DROPOUT VOLTAGE (V)
0.25
0.20
100 mA
0.15
0.10
50 mA
30 mA
0.05
10 mA
2
3
0.15
50 mA
0.10
30 mA
0.05
5
4
10 mA
2
3
4
5
Vreg, SET OUTPUT VOLTAGE (V)
Vreg, SET OUTPUT VOLTAGE (V)
Figure 27. Dropout Voltage vs. Set Output
Voltage
Figure 28. Dropout Voltage vs. Set Output
Voltage
0.25
80
VR3
VOUT = 3.0 V
RR, RIPPLE REJECTION (dB)
VDF, DROPOUT VOLTAGE (V)
0.20
0.00
0.00
0.20
0.15
50 mA
0.10
30 mA
0.05
10 mA
0.00
2
3
4
1 mA
40
30
20
10
VR1
COUT = 0.47 mF
VOUT = 3.0 V
1
10
100
Figure 29. Dropout Voltage vs. Set Output
Voltage
Figure 30. Ripple Rejection vs. Frequency
50 mA
1 mA
50
40
30
VR1
COUT = 2.2 mF
VOUT = 3.0 V
1
10
RR, RIPPLE REJECTION (dB)
80
10 mA
0
0.1
10 mA
50
FREQUENCY (kHz)
60
10
60
Vreg, SET OUTPUT VOLTAGE (V)
70
20
50 mA
70
0
0.1
5
80
RR, RIPPLE REJECTION (dB)
VR2
VOUT = 3.0 V
70
60
50
1 mA
40
10 mA
30
20
10
0
0.1
100
50 mA
VR2
COUT = 0.47 mF
VOUT = 3.0 V
1
10
FREQUENCY (kHz)
FREQUENCY (kHz)
Figure 31. Ripple Rejection vs. Frequency
Figure 32. Ripple Rejection vs. Frequency
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100
NCP4523
80
86
50 mA
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
50 mA
70
60
1 mA
50
10 mA
40
30
VR2
COUT = 2.2 mF
VOUT = 3.0 V
20
10
0
0.1
1
10
10 mA
80
78
VR3
COUT = 2.2 mF
VOUT = 3.0 V
76
74
Figure 34. Ripple Rejection vs. Frequency
60
50 mA
50
1 mA
10 mA
40
30
VR3
COUT = 2.2 mF
VOUT = 3.0 V
0
−50
1.00
Figure 33. Ripple Rejection vs. Frequency
70
10
0.10
FREQUENCY (kHz)
0.30
20
1 mA
FREQUENCY (kHz)
VDF, DROPOUT VOLTAGE (V)
RR, RIPPLE REJECTION (dB)
82
72
0.01
100
80
VR1
VOUT = 3.0 V
0.25
25°C
0.20
0.15
85°C
0.10
−40°C
0.05
0.0
−25
0
25
50
75
100
125
0
50
100
150
FREQUENCY (kHz)
IOUT, OUTPUT CURRENT (mA)
Figure 35. Ripple Rejection vs. Frequency
Figure 36. Dropout Voltage vs. Output Current
0.30
0.30
VR2
VOUT = 3.0 V
0.25
VDF, DROPOUT VOLTAGE (V)
VDF, DROPOUT VOLTAGE (V)
84
25°C
0.20
0.15
85°C
0.10
−40°C
0.05
0.0
VR3
VOUT = 3.0 V
0.25
25°C
0.20
85°C
0.15
0.10
−40°C
0.05
0.0
0
50
100
150
0
50
100
150
IOUT, OUTPUT CURRENT (mA)
IOUT, OUTPUT CURRENT (mA)
Figure 37. Dropout Voltage vs. Output Current
Figure 38. Dropout Voltage vs. Output Current
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NCP4523
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
COUT = 2.2 mF Tantalum
IOUT = 50 mA
Output Voltage (VR1)
2.0
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
1.0
2.97
2.96
0
10
20
30
40
50
60
70
0.0
80
TIME (ms)
Figure 39. Line Transient Response
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
2.0
Output Voltage (VR1)
COUT = 2.2 mF Tantalum
IOUT = 30 mA
2.97
2.96
0
10
20
30
40
50
60
70
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
1.0
0.0
80
TIME (ms)
Figure 40. Line Transient Response
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
2.0
Output Voltage (VR1)
COUT = 2.2 mF Tantalum
IOUT = 10 mA
2.97
2.96
0
10
20
30
40
50
60
70
TIME (ms)
Figure 41. Line Transient Response
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1.0
0.0
80
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
NCP4523
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
COUT = 0.47 mF Tantalum 2.0
IOUT = 50 mA
1.0
Output Voltage (VR1)
2.97
2.96
0
10
20
30
40
50
60
70
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
0.0
80
TIME (ms)
Figure 42. Line Transient Response
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
2.0
Output Voltage (VR1)
2.97
COUT = 0.47 mF Tantalum 1.0
IOUT = 30 mA
0.0
40
50
60
70
80
2.96
0
10
20
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
30
TIME (ms)
Figure 43. Line Transient Response
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
2.0
Output Voltage (VR1)
2.97
2.96
0
10
20
30
COUT = 0.47 mF Tantalum 1.0
IOUT = 10 mA
0.0
40
50
60
70
80
TIME (ms)
Figure 44. Line Transient Response
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16
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
NCP4523
6.0
3.02
5.0
Input Voltage
3.00
4.0
2.99
COUT = Ceramic 2.2 mF and ESR 1.0 W 3.0
IOUT = 50 mA
2.98
2.0
Output Voltage (VR1)
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
1.0
2.97
2.96
0
10
20
40
30
50
60
70
0.0
80
TIME (ms)
Figure 45. Line Transient Response
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
2.0
Output Voltage (VR1)
2.97
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
COUT = Ceramic 2.2 mF and ESR 1.0 W 1.0
IOUT = 30 mA
2.96
0
10
20
30
40
50
60
70
0.0
80
TIME (ms)
Figure 46. Line Transient Response
3.02
6.0
5.0
Input Voltage
3.00
4.0
2.99
3.0
2.98
2.0
Output Voltage (VR1)
COUT = Ceramic 2.2 mF and ESR 1.0 W
IOUT = 10 mA
2.97
2.96
0
10
20
30
40
50
60
70
TIME (ms)
Figure 47. Line Transient Response
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17
1.0
0.0
80
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.01
NCP4523
150
3.35
100
3.30
3.25
IOUT1
3.20
50
3.15
VOUT1
VOUT, OUTPUT VOLTAGE (V)
3.10
0
3.05
3.00
2.95
2.90
3.05
VOUT2
3.00
IOUT2 = 30 mA
2.95
2.90
3.05
VOUT3
3.00
2.95
IOUT3 = 10 mA
2.90
2.85
2.80
−40 −30 −20 −10
0
10
20
30
40
50 60
70
t, TIME (ms)
Figure 48. Load Transient Response
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80 90 100
IOUT, OUTPUT CURRENT (mA)
COUT = 2.2 mF + 1 W
3.40
NCP4523
COUT = 2.2 mF + 1 W
3.35
100
3.30
3.25
3.20
50
3.15
IOUT2
0
VOUT, OUTPUT VOLTAGE (V)
3.10
3.05
3.00
VOUT1
2.95
IOUT1 = 50 mA
2.90
3.05
VOUT2
3.00
2.95
2.90
3.05
VOUT3
3.00
IOUT3 = 10 mA
2.95
2.90
2.85
2.80
−40 −30 −20 −10
0
10
20
30
40
50 60
70
t, TIME (ms)
Figure 49. Load Transient Response
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80 90 100
IOUT, OUTPUT CURRENT (mA)
3.40
NCP4523
100
3.25
50
3.20
3.15
IOUT3
3.10
0
3.05
VOUT, OUTPUT VOLTAGE (V)
3.00
VOUT1
2.95
IOUT1, OUTPUT CURRENT (mA)
COUT = 2.2 mF + 1 W
3.30
IOUT1 = 50 mA
2.90
3.05
VOUT2
3.00
2.95
IOUT2 = 30 mA
2.90
3.05
VOUT3
3.00
2.95
2.90
2.85
2.80
−40 −30 −20 −10
0
10
20
30
40
50 60
70
80 90 100
t, TIME (ms)
Figure 50. Load Transient Response
Technical Notes
(Pin numbers of the diagram below are applied to NCP4523)
To use this IC with ceramic capacitors, ESR should be set in the range of the following graphs. Test circuit for Noise level
measurement is shown below.
IOUT1
Ceramic
Capacitor
ESR
S.A.
ESR
VDD 8
2 VOUT2
CE1 7
IOUT2
Ceramic
Capacitor
Spectrum
Analyzer
1 VOUT1
VIN
IOUT3
3 VOUT3
CE2 6
4 GND
CE3 5
Ceramic
Capacitor
ESR
Ceramic 1.0 mF
Figure 51.
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20
NCP4523
Noise level is measured with a spectrum analyzer and hatched area shows stable areas of which noise level is approximately
equal or less than 40 mV (Avg.). The relation between Load Current (IOUT) and Equivalent Series Resistors (ESR) value of
external output capacitor with the stable area is shown below.
100
100
STABLE
1
UNSTABLE
0.1
UNSTABLE
0.01
0
50
150
100
0
50
100
150
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 52. Ceramic Capacitor 1.0 mF
Figure 53. Ceramic Capacitor 2.2 mF
100
100
STABLE
1
UNSTABLE
0.1
STABLE
10
ESR (W)
10
ESR (W)
1
0.1
0.01
1
UNSTABLE
0.1
0.01
0.01
0
20
40
60
80
0
20
40
60
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 54. Ceramic Capacitor 1.0 mF
Figure 55. Ceramic Capacitor 2.2 mF
100
80
100
STABLE
1
UNSTABLE
0.1
STABLE
10
ESR (W)
10
ESR (W)
STABLE
10
ESR (W)
ESR (W)
10
1
UNSTABLE
0.1
0.01
0.01
0
20
40
60
80
0
20
40
60
LOAD CURRENT (mA)
LOAD CURRENT (mA)
Figure 56. Ceramic Capacitor 1.0 mF
Figure 57. Ceramic Capacitor 2.2 mF
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21
80
NCP4523
ORDERING INFORMATION
Device
NCP4523G1T1
NCP4523G1T1G
NCP4523G3T1
NCP4523G3T1G
NCP4523G20T1
NCP4523G20T1G
Output Voltage
Marking
S/N for Voltage
Setting
VR1
VR2
VR2
Product Code
Package
Shipping †
1
2.8
2.8
2.8
B01A
SSOP−8
3000 Tape and Reel
1
2.8
2.8
2.8
B01A
SSOP−8
(Pb−Free)
3000 Tape and Reel
3
3.0
3.0
3.0
B03A
SSOP−8
3000 Tape and Reel
3
3.0
3.0
3.0
B03A
SSOP−8
(Pb−Free)
3000 Tape and Reel
20
2.35
2.8
2.8
B20A
SSOP−8
3000 Tape and Reel
20
2.35
2.8
2.8
B20A
SSOP−8
(Pb−Free)
3000 Tape and Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
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22
NCP4523
PACKAGE DIMENSIONS
SSOP−8
G SUFFIX
CASE 487−01
ISSUE O
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION D APPLIES TO PLATED TERMINAL
AND IS MEASURED BETWEEN 0.25 AND 0.30 MM
FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED PAD
AS WELL AS THE TERMINALS.
−X−
E
8
−Y−
5
B L
1
DIM
A
B
C
D
E
F
G
H
J
K
L
4
H
A
K
C
0.10 (0.004)
G
−T−
NOTE 3
D 8 PL
0.15 (0.006)
M
F
SEATING
PLANE
INCHES
MIN
MAX
0.106
0.122
0.102
0.118
0.039
0.051
0.004
0.012
0.073
0.081
0.012
0.024
0.026 TYP
0.019 TYP
0.004
0.006
0.000
0.008
0.150
0.165
MILLIMETERS
MIN
MAX
2.70
3.10
2.60
3.00
1.00
1.30
0.10
0.30
1.85
2.05
0.30
0.60
0.65 TYP
0.475 TYP
0.11
0.14
0.00
0.20
3.80
4.20
J
T X Y
SOLDERING FOOTPRINT*
1.465 mm
0.38 mm
0.65 mm
2.32 mm
5.28 mm
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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23
NCP4523
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
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