AP1158ADS

[AP1158ADS]
AP1158ADS
Active Noise Filter IC
1. General Description
AP1158ADS is active noise filter IC, which can extremely reduce the ripple noise on the power supply line.
The ripple filter can be composed of few external components with low input-output voltage drop (Vdrop).
Vdrop can be set by external resistance. It is packaged in SOT23-5 and suitable for small set.
2. Feature
 Low Vdrop ripple filter can be composed of few parts.
 Built-in PNP power transistor
 Output Current
150mA
 Ripple Rejection
66dB at 1kHz
 Input Voltage Range
 Quiescent Current
1.8V~14.0V
65μA at Iout=0mA
 Internal on/off function (High active)
 Built-in Short-circuit Protection and Thermal Shutdown Protection
 Built-in Bias Over-current Blocking Circuit
 Available to use as low Vdrop / low noise regulator.
 Small Package
SOT23-5
3.
Applications
 Audio Equipment (Car stereo)
 Image equipment (car navigation system)
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4. Table of Contents
1.
2.
3.
4.
5.
6.
7.
General Description ....................................................................................................................................1
Feature .........................................................................................................................................................1
Applications ................................................................................................................................................1
Table of Contents ........................................................................................................................................2
Block Diagram ............................................................................................................................................3
Ordering Guide ...........................................................................................................................................3
Pin Configurations and Functions ...............................................................................................................4
■ Pin Configuration ........................................................................................................................................4
■ Functions .....................................................................................................................................................4
8. Absolute Maximum Rating .........................................................................................................................5
9. Recommended Operating Conditions .........................................................................................................5
10. Electrical Characteristics ............................................................................................................................6
■ Electrical Characteristics of Ta=Tj=25C ..................................................................................................6
■ Electrical Characteristics of Ta=-40C ~85C............................................................................................7
11. Description ..................................................................................................................................................8
11.1
DC Characteristics ...........................................................................................................................8
11.2
DC Temperature Characteristics ....................................................................................................10
11.3
Ripple Rejection .............................................................................................................................12
11.4
Output Noise ..................................................................................................................................13
11.5
Transient Response ........................................................................................................................14
11.6
Output Capacitors...........................................................................................................................15
11.7
The ability of a built-in power transistor and setting of Vdrop .....................................................16
11.8
Application of low ripple and low noise multi output ...................................................................17
11.9
Ripple noise reduction of DC-DC converter output ......................................................................18
11.10 Reduce the motor noise ..................................................................................................................18
11.11 Voltage-Power Conversion ............................................................................................................19
11.12 On/Off Control Switching Speed ...................................................................................................19
12. Definition of Term ....................................................................................................................................20
13. Test Circuit................................................................................................................................................21
14. Package .....................................................................................................................................................22
■ Outline Dimensions...................................................................................................................................22
15. Revise History ...........................................................................................................................................23
IMPORTANT NOTICE ................................................................................................................................24
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5. Block Diagram
Vin
Vout
FIL
Constant
Current
Source
Cont
GND
6. Ordering Guide
AP1158ADS
015006896-E-00
-40 to 85°C
SOT23-5
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[AP1158ADS]
7. Pin Configurations and Functions
VOUT
COnt
■ Pin Configuration
5
4
1
2
3
VIn
GND
FIL
(Top view)
■ Functions
Pin
No.
Pin
Description
Internal Equivalent Circuit
1
Vin
-
Input Terminal
Connect a 1μF or more of capacity
between the GND terminal.
2
GND
-
GND Terminal
Vin
Vout
Filter Terminal
Output voltage setting resistance (Rfil) is
connected between Vin.
Capacitor of the filter (Cfil) is connected
between GND.
FIL
3
3
FIL
Vcont
4
4
On/Off Control Terminal
VCONT > 1.8V: ON
VCONT < 0.4V: OFF
The pull-down resister (400k) is built-in.
300k
Cont
400k
Vin
5
Vout
5
Output Terminal
Connect a 1μF or more of capacity
between the GND terminal.
Vout
FIL
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8. Absolute Maximum Rating
Parameter
Supply Voltage
Reverse bias voltage
Range of Fil terminal set voltage
Control terminal voltage
Junction temperature
Storage Temperature Range
Symbol
Vin
Vrev
VNP
VCont
Tj
TSTG
min
-0.4
-0.4
-0.4
-0.4
-55
max
16
8
16
16
150
150
Unit
V
V
V
V
C
C
PD
-
500
mW
Power Dissipation
Condition
Vout-Vin
When mounted on board
(Note 1)
Note 1. -4.0mW/C (at 25C or more), θJA=250C /W
WARNING: The maximum ratings are the absolute limitation values with the possibility of the IC breakage.
When the operation exceeds this standard quality cannot be guaranteed.
9. Recommended Operating Conditions
Parameter
Operating Temperature Range
Operating Voltage Range
015006896-E-00
Symbol
min
typ
max
Unit
Ta
VOP
-40
2.1
-
85
14
C
V
-5-
Condition
2015/05
[AP1158ADS]
10. Electrical Characteristics
■ Electrical Characteristics of Ta=Tj=25C
The parameters with min or max values will be guaranteed at Ta=Tj=25C.
( Vin=2.5V, Vcont=2V, Rfil=390kΩ, Cin=1μF, Cfil=4.7μF, Cout=1μF, unless otherwise specified.)
Condition
Parameter
Symbol
min
typ
max Unit
Quiescent Current
Iin
Iout = 0mA
65
100
μA
Standby Current
Istandby Vin = 8V, Vcont = 0V
0.1
100
nA
Output Current
Iout
150
mA
Maximum Output Current
IoutMAX Vout = Vouttyp0.9
360
mA
(Note 2) (Note 5)
Load Regulation
LoaReg Iout = 1 ~ 100mA
6
20
mV
Reverse Bias Current
Irev
Vin= 0V,Vcont= 0V,Vout= 8V
0.1
100
nA
FIL terminal Sink current
Isink
FIL terminal voltage = Vin - 0.3V
0.5
0.6
0.72
μA
Error Amp
Verror Iout = 30mA
20
40
60
mV
Input Offset Voltage
Control Terminal
Control Terminal Current
Icont
Vcont = 2.0V
4.5
8.0
μA
Control Terminal Voltage
Ripple Rejection
(Note 3)
Vcont
R.R.
Vout ON state
Vout OFF state
Iout = 30mA
Ripple
Noise=200mVp-p(@1kHz)
1.8
-
-
0.4
V
V
55
66
-
dB
Output Noise
nV/
at 1kHz
60
(Note 4) (Note 5)
√Hz
Note 2. The maximum output current is limited by power dissipation.
Note 3. Ripple rejection is dependent on the characteristics of the input and output voltage difference and the
capacitor, which is set by the resistance. Consider the variation of the variation and the capacitance value of
the resistance value. Value of Rfil and Cfil, please change according to the conditions required by the set. The
above value is an example of the measurement.
Note 4. This is the output noise without ripple noise. The IC itself generates the noise because it is
semiconductor integrated circuit.
Note 5. Items of typical value only show reference values.
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■Electrical Characteristics of Ta=-40C ~85C
The parameters with min or max values will be guaranteed at Ta=Tj=-40 ~ 85C.
(Vin=2.5V, Vcont=2V, Rfil=390kΩ, Cin=1μF, Cfil=4.7μF, Cout=1μF, unless otherwise specified.)
Parameter
Symbol
Condition
min
typ
max Unit
Iin
Iout = 0mA
65
120
μA
Quiescent Current
Istandby Vin = 8V, Vcont = 0V
0.1
500
nA
Standby Current
Iout
360
mA
Output Current
Maximum Output Current
IoutMAX Vout = Vouttyp0.9
150
mA
(Note 6) (Note 9)
LoaReg Iout = 1 ~ 100mA
6
55
mV
Load Regulation
Irev
Vin = 0V, Vcont=0V, Vout=8V
0.1
2000
nA
Reverse Bias Current
Isink
FIL terminal voltage = Vin - 0.3V
0.4
0.6
0.84
μA
FIL terminal Sink current
Error Amp
Verror
Iout = 30mA
-30
40
110
mV
Input Offset Voltage
Control Terminal
Icont
Vcont = 2.0V
4.5
10.0
μA
Control Terminal Current
Control Terminal Voltage
Vcont
Ripple Rejection
(Note 7)
R.R.
Vout ON state
Vout OFF state
Vin = 2.5V, Rfil = 390kΩ
Iout = 30mA, Cfil = 4.7μF
Ripple Noise=200mVp-p(@1kHz)
1.8
-
-
V
-
-
0.4
V
40
66
-
dB
Output Noise
nV/
60
at 1kHz (Reference value)
√Hz
(Note 8)(Note 9)
Note 6. The maximum output current is limited by power dissipation.
Note 7. Ripple rejection is dependent on the characteristics of the input and output voltage difference and the
capacitor, which is set by the resistance. Consider the variation of the variation and the capacitance value of
the resistance value. Value of Rfil and Cfil, please change according to the conditions required by the set. The
above value is an example of the measurement.
Note 8. This is the output noise without ripple noise. The IC itself generates the noise because it is
semiconductor integrated circuit.
Note 9. Items of typical value only show reference values.
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11. Description
DC Characteristics
11.1
Measurement conditions (Otherwise specified) :
Vin=2.5V, Vcont=2V, Rfil=390kΩ, Cin=1μF, Cfil=4.7μF, Cout=1μF, Iout=5mA
■ Error Amp. off-set Voltage
1.0
100
0.9
90
0.8
80
0.7
70
Voffset [ mV ]
Isink [ μA ]
■ Filter Terminal Sink Current
0.6
0.5
0.4
0.3
0.2
0.1
60
50
40
30
20
10
0.0
0
0
2
4
6
8 10 12 14 16 18 20
0
2
4
6
Vin [ V ]
Vin [ V ]
■ Quiescent Current (Iout=0mA)
400
100
380
90
360
80
340
70
320
60
Iin [ μA ]
Vdrop [ mV ]
■ Vdrop
300
280
260
50
40
30
240
20
220
10
200
0
0
2
4
6
8 10 12 14 16 18 20
0
2
4
Vin [ V ]
8 10 12 14 16 18 20
■ GND Pin Current
30
16
20
14
10
12
0
-10
Ignd
[ m ]
Vdrop(mV)
Vdrop(mV)
6
Vin [ V ]
■ Load Regulation
∆Vdrop [ mV ]
8 10 12 14 16 18 20
-20
-30
-40
-50
10
8
6
4
2
-60
-70
0
0
50
100
150
200
250
300
0
Iout(mA)
Iout [ mA ]
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100
150
200
250
300
Iout [ mA ]
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■ Vout ON-Point
■ Cont Current vs Cont Voltage
5.0
3.5
3.0
2.5
2.0
1.5
3.0
2.5
2.0
1.5
1.0
Icont [ A ]
3.5
Vout(V)
4.0
Vout [ V ]
60
55
50
45
40
35
30
25
20
15
10
5
0
5.0
4.5
4.0
4.5
1.0
0.5
0.0
0.5
0.0
0.0
0.5
1.0
1.5
2.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0
2
4
6
Vcont [ V ]
Vcont [ V ]
■ Standby Current
■ Reverse bias Current
1.E-04
1.E-04
1.E-05
1.E-05
1.E-06
1.E-06
1.E-07
1.E-07
Irev [ A ]
Istandby [ A ]
1.E-08
1.E-09
1.E-10
1.E-08
1.E-09
1.E-10
1.E-11
1.E-11
0
2
4
6
8 10 12 14 16 18 20
0
2
4
6
Vin [ V ]
■ Maximum Output Current (Vin)
3.0
IoutMAX[mA]
2.5
2.0
1.5
1.0
0.5
0.0
0
100
200
300
400
500
450
400
350
300
250
200
150
100
50
0
0
500
Iout[mA]
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8 10 12 14 16 18 20
Vrev [ V ]
■ Maximum Output Current
Vout [V]
8 10 12 14 16 18 20
5
10
15
20
Vin[V]
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11.2 DC Temperature Characteristics
Measurement conditions (Otherwise specified) :
Vin=2.5V, Vcont=2V, Rfil=390kΩ, Cin=1μF, Cfil=4.7μF, Cout=1μF, Iout=5mA
■ Error Amp. off-set Voltage
1.0
50
0.9
45
0.8
40
0.7
35
Voffset [ mV ]
Isink [ A ]
■ Filter Terminal Sink Current
0.6
0.5
0.4
0.3
0.2
0.1
20
15
10
0
-40
-20
0
20
40
Ta(ーC)
Ta [ C
60
80
100
-40
-20
0
Ta(ーC)
]
■ Vdrop
20
40
60
80
100
80
100
Ta [ C ]
■ Quiescent Current (Iout=0mA)
300
100
295
90
290
80
285
70
280
60
Icc [ A ]
Vdrop [ mV ]
25
5
0.0
275
270
265
50
40
30
260
20
255
10
250
0
-40
-20
0
20
40
Ta(ーC)
Ta [ C
60
80
100
-40
-20
0
20
40
60
TaTa(ーC)
[ C ]
]
■ Load Regulation
■ GND Pin Current
10
0
Iout = 150 , 100 , 50 , 30 mA
9
-5
8
-10
7
-15
Ignd [ m ]
∆Vdrop [ mV ]
30
-20
-25
Iout = 200 , 100 , 50 , 30 mA
-30
-35
6
5
4
3
2
-40
1
-45
0
-50
-40
-20
0
20
40
60
Ta [ C ]
80
-40
100
0
20
40
60
80
100
TaTa(ーC)
[ C ]
Ta(ーC)
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■ Vout ON-Point
■ Cont Current vs Cont Voltage
30
2.0
1.8
25
1.6
Vcont = 2 , 4 , 6 V
20
Icont [ A ]
Vout [ V ]
1.4
1.2
1.0
0.8
0.6
0.4
15
10
5
0.2
0.0
0
-40
-20
0
20
40
Ta(ーC)
Ta [ C
60
80
100
-40
-20
0
20
Ta(ーC) Ta
]
40
60
80
100
[ C ]
■ Maximum Output Current
500
450
IoutMax [ mA ]
400
350
300
250
200
150
100
50
0
-40
-20
0
20
40
60
80
100
Ta(ーC)
Ta [ C ]
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Ripple Rejection
11.3
Measurement condition (Otherwise specified)
Vin=2.5V, Vcont=2V, Ripple Noise=200mVp-p, Rfil=390kΩ, Cin=1μF, Cfil=4.7μF, Cout=1μF,
Iout=30mA
RR [ dB ]
0
Cfil=0.1, 1.0, 4.7μF
-10
-20
Vin
Vout
FIL
Cont
200mVp-p ~ 390kΩ
-30
-40
1μF
xx μF
-50
GND
30mA
2V
-60
-70
-80
-90
-100
10
100
1k
10k
100k
1M
Frequency [ Hz ]
■ RR vs Iout ( Freq = 1kHz )
0
-10
-20
-20
R.R.(dB)
0
-10
-30
-30
RR [ dB ]
RR [ dBR.R.(dB)
]
■ RR vs Ripple Noise ( Freq = 1kHz )
-40
-50
-40
-50
-60
-60
-70
-70
-80
-80
0
200
400
600
800
1000
0
Ripple Noise Level [ mVp-p ]
50
100
150
200
Iout [ mA ]
■ RR vs Vin
0
-10
-20
RR [ dB ]
-30
-40
-50
-60
-70
-80
0
2
4
6
8
10
12
14
16
Vin [ V ]
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11.4 Output Noise
50
50
40
40
Noise [ uVrms ]
Noise [ uVrms ]
Measurement condition (Otherwise specified)
Vin=2.5V, Vcont=2V, Rfil=390kΩ, Cin=1μF, Cfil=4.7μF, Cout=1μF, Iout=30mA
■ Output Noise vs Iout
■ Output Noise vs Vin
30
20
10
0
30
20
10
0
0
50
100
150
200
0
Iout [ mA ]
2
4
6
8
10
12
14
16
Vin [ V ]
■ Output Noise Density
Noise [ uV/√Hz ]
1
Cfil=1.0μF
Cfil=0.1μF
0.1
0.01
100
1k
10k
100k
Frequency [ Hz ]
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11.5 Transient Response
Measurement condition (Otherwise specified)
Vin=2.5V, Vcont=2V, Rfil=390kΩ, Cin=1μF, Cfil=4.7μF, Cout=1μF, Iout=30mA
 On/Off control transient response
 Input transient response
2.5V
2V
V
c
0V
o
n
Cout=1.0μF t 2.2μF4.7μF
0V
V
i
n
Cfil=1.0μF  2.2μF4.7μF
V
o
u
t
V
o
u
t
1V
1V
10μsec
1sec
 Load transient response
30mA
0 or 1 mA
I
o
u
t
0  30 mA 500mV/div
V
o
u 100mV/div
1  30 mA
t
100μse
c
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[AP1158ADS]
11.6 Output Capacitors
AP1158ADS requires input and output capacitors in order to maintain the loop stability. AP1158ADS may
oscillate if there is no input/output capacitor. Please select the output capacitor whose equivalent series
resistance (ESR) is in the stable operation area. Please refer to the following graph and select the capacitor of
the best characteristics. Either ceramic or tantalum capacitor can be used for output terminal. If the capacitor
of 0.22μF or more and the equivalent series resistance is 6Ω or less is connected to the output pin, the IC
provides stable operation. The capacitance and the equivalent series resistance have tolerance that depends on
the product and the manufacturer. Generally, a ceramic capacitor has both temperature characteristic and
voltage characteristic. Please consider both characteristics when selecting the part. A recommended value of
the application is 1.0uF or more.
ESR [ Ω ]
ESR [ Ω ]
Cout = 0.22μF
100
Cout = 1.0μF
100
Unstable Area
Unstable Area
10
10
1
1
Stable area
Stable area
0.1
0.1
0.01
0.01
0
50
100
150
200
Iout [ mA ]
0
50
100
150
200
Iout [ mA ]
Figure 1. Unstable area
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11.7 The ability of a built-in power transistor and setting of Vdrop
0
0
50
50
100
100
150
150
Vsat [ mV ]
Vsat [ mV ]
Figure 2 shows the ability of a built-in power transistor. When Vdrop of AP1158ADS is set to 300mV, it can
supply an output current of 250mA at the maximum. But this is a current value when the input voltage does not
have the ripple noise. When the input voltage has the ripple noise, it cannot supply the output current value
more. When the input voltage has the ripple noise shown in Figure 3, it can supply an output current of only
150mA at the maximum.
200
250
300
350
200
250
300
350
400
400
450
450
500
500
Ripple Noise
0
50
100
150
200
250
300
0
Iout [ mA ]
50
100
150
200
250
300
Iout [ mA ]
Figure 2. (Left) The ability of a built-in power transistor
(Right) When the input voltage has the ripple noise
500
20
450
10
400
0
350
-10
∆Vdrop [ mV ]
Vdrop [ mV ]
If using output current is small, Vdrop can be reduced by lowering the value of Rfil. Figure 3 (Left) shows
relations of Rfil and Vdrop. When Vdrop is reduced, load regulation deteriorates as shown in Figure 3(Right).
300
250
200
150
100
50
-20
-30
390kΩ
-40
-50
300kΩ
-60
200kΩ
-70
0
(Rfil)
510kΩ
100kΩ
-80
0
200k
400k
600k
800k
0
Rfil [ Ω ]
50
100
150
200
250
300
Iout [ mA ]
Figure 3. (Left)Vdrop vs Rfil(Iout=5mA)
(Righ) Load Regulation (Rfil)
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11.8 Application of low ripple and low noise multi output
Input
Output 1
6
5
4
Vin
GND
Vout
Rfil
390k
Vcont
GND
Np
1
2
3
The ripple rejection effect varies with a
DC level of the input.
AP1158ADS
Vin
AP1152ADS
Cfil
4.7F
Output 2
Vout
FIL
Input-∆V*
There are Output 1 and an approximately
equal ripple rejection effect. The DC level
changes by the voltage of the input.
The ripple rejection effect does not
depend on a DC level of the input.
1F
GND
3.0V
Cont
AP1158ADS
Vin
Rfil
390k
Output1-∆V*
Output 3 is the output of low ripple and
low noise more than Output 1.
1F
GND
FIL
Output 3
Vout
Cont
*∆V = Rfil  0.6μA + Voffset ( Typ:40mV)
Cfil
4.7F
Figure 4. Low Ripple and Low Noise System Output
0.2V/div 25μs/div
5mV/div 25μs/div
5mV/div 25μs/div
5mV/div 25μs/div
Input
Output 1
Output 2
Output 3
Figure 5. Input Voltage : 3.55V + Ripple Noise
0.2V/div 25μs/div
5mV/div 25μs/div
5mV/div 25μs/div
5mV/div 25μs/div
Input
Output 1
Output 2
Output 3
Figure 6. Input Voltage : 3.35V + Ripple Noise
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11.9 Ripple noise reduction of DC-DC converter output
Ripple noise of the DC-DC converter is removed by connecting AP1158ADS at the output of the DC-DC
converter.
L
AP1158ADS
Vin
4.7F
DC-DC
converter
SBD
Rfil
390k
10F
Output2
GND
FIL
R2
Vout
Cont
Cfil
4.7F
R1
Output 1
Figure 7. Ripple noise removal of DC-DC converter output
50mV/div 250ns/div
50mV/div 250ns/div
Output 1
Output 2
Figure 8. Output ripple noise
11.10 Reduce the motor noise
When high voltage from the battery without motor noise is necessary, refer to Figure 9.
Voltage with large ripple
AP1158ADS
AP1158A
DS
Vin
Rfil
M
Low ripple voltage
The output voltage will drop ΔV
from the battery voltage.
ΔV is determined by Rfil.
Cfil
Figure 9. Reduce the motor noise
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11.11 Voltage-Power Conversion
AP1158ADS
DA converter
DC voltage
output
Vout
The voltage will be same as the DA
converter power output.
AP1158A
DS
Vin
C
Figure 10. Voltage-Power conversion
11.12 On/Off Control Switching Speed
Vout rises at high-speed when Cont pin is controlled with the input voltage is added to Vin pin. It takes long
time to charge Cfil when Vin is controlled directly. Please reduce the time constant of the filter to make the
rise time early. Therefore, it is necessary to reduce the Cfil. Cfil=4.7μF is a standard but can be changed.
Please choose the best Cfil according to the ripple noise level and the frequency. Moreover, the rise time
becomes earlier by connecting diode parallel with Rfil. “Vf×1/2 of the diode” is a standard of the Vdrop.
[Charge time]
Only at Rfil=390kΩ, Cfil=4.7μF
t=5  Cfil  Rfil = 5  390  103 470  10-6 = 9.25 sec
AP1158ADS
AP1158A
DS
AP1158A
DS
AP1158ADS
Figure 11. SW switching circuit
2V
Vcont
0V
Vout
V
c
o
Cout=1.0μF  2.2μF4.7μF
n
t
V
o
u
t
1V
10μsec
Figure 12. On / off speed when it is changing the output side capacitor
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12. Definition of Term
・Sink Current of FIL Terminal
The sink current of the FIL terminal is 0.6A(typ). The Vdrop is calculated as follows.
Vdrop = {(Sink Current)  (Rfil)} + (Offset voltage)
Ripple rejection ratio largely depends on this value.
Standard value: Rfil = 390kΩ (Vdrop =270mV) , Vdrop (mV) = Rfil (k) × 0.6A + 40mV
·Input-output voltage drop (Vdrop)
Vdrop is set by Rfil. It is necessary to set Vdrop large when there is a margin between the input voltage and
output voltage, or the ripple noise is large. Please fix the Vdrop according to ripple noise, maximum output
current and operating voltage.
· On / Off Control
Control terminal is active “H”. By connecting the terminal to GND, input current becomes almost zero.
(Operation stops) If the load current is 0 (the load impedance is very high), the Cout electric charge remains.
Therefore, if the ripple filter IC is switched at the same time with the load, quick response application will be
available. In case not using on/off control, please connect this terminal to Vin. The control current decreases
when resistance is connected in series. Series resistance around 300kΩ and pull-down resistor are built in this
terminal. Therefore, when series resistance is connected, the control current will decrease though the control
voltage may swerves to high side. There is no hysteresis in this terminal. Please apply “H” or “L” surely
otherwise noise level will increase.
·Ripple Rejection Ratio (R.R.)
Ripple rejection is the ability of the IC to attenuate the ripple content of the input voltage at the output. It is
specified with the input voltage with AC voltage (condition: 1) overlapped with DC voltage (condition: 2)
Condition1: 200mVp-p, f=1kHz, Condition2: Vin=2.5V
The measurement condition is as follows.
Cin=0.1F, Cout=1F, Cfil=4.7F, Rfil=390kΩ(Vdrop=270mV),Vin: DC=2.5V, AC=200mVp-p (at f=1kHz)
It is necessary to enlarge Rfil and Cfil to improve the ripple rejection ratio at the low frequency range. The
ripple rejection depends on the set Vdrop and the characteristics of the capacitor. Please consider the tolerance
of resistor and capacitor. Please adjust the value of Rfil(=390kΩ) and Cfil(=4.7μF) depends on application.
· On / Off speed
Vout rises at high-speed when Cont pin is controlled with the input voltage is added to Vin pin. Operation will
be very slow when the power supply is started by other control functions. When the time constant of the filter
is small, Vout stands up quickly. By connecting diode in parallel with Rfil, Vout also stands up quickly.
·Maximum Output Current (Iout MAX)
The rated output current is specified under the condition when the output voltage drops 10% the value
specified with Iout=5mA. The input voltage is set at VoutTYP+1V and the current is pulsed to minimize
temperature effect.
·Reverse Bias Current (Irev)
The current flows from the Vout pin to the IC when Vin=0V, Vcont=0V and Vout=8V.
·Quiescent Current (Ignd)
The current flows to GND terminal. It is the difference between the input current and the output current.
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13. Test Circuit
A
Iin
Rfil
390k
Vin
1
Vin
2
GND
3
FIL
Vout
5
Cout
1F
Iout V
Vout
A Isink
Cin
1F
Cont
Cfil
4.7F
4
A
Icont
Vcont
Figure 13.Test Circuit
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14. Package
■Outline Dimensions
(Unit: mm)
Mark
Lot No.
5
4
1
1.6 0.1
+0.2
R33
xxx
3
0.4 +
 0.1
0.95
0.95
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+0.10
0.125 0.05
0 ~0.15
1.1 +
 0.1
 0.2
2.9 +
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+0.2
2.8 0.3
0.4 +
 0.2
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15. Revise History
Date
(YY/MM/DD)
15/05/26
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Revision
00
Page
-
Contents
First Edition
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IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the
information contained in this document without notice. When you consider any use or application of
AKM product stipulated in this document (“Product”), please make inquiries the sales office of
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