ETC R1223NXXXX

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545561#6(5,(6
$33/,&$7,21#0$18$/
NO. EA-065-0006
PWM/VFM step-down DC/DC Converter
Controller
545561#6(5,(6
OUTLINE
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FEATURES
• 5DQJH#RI#,QSXW#9ROWDJH 1111111111111111111111111111111111111111111111111111111 5169∼46159
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• 7ZR#FKRLFHV#RI#2VFLOODWRU#)UHTXHQF\111111111111111111111111111111111 633N+]/#833N+]
• +LJK#(IILFLHQF\ 1111111111111111111111111111111111111111111111111111111111111111111 7<31#<3(
• 2XWSXW#9ROWDJH
6WHSZLVH#6HWWLQJ#ZLWK#D#VWHS#RI#3149#LQ#WKH#UDQJH#RI#4189#∼
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• 6WDQGE\#&XUUHQW 11111111111111111111111111111111111111111111111111111111111111111 7<31#3—$
• +LJK#$FFXUDF\#2XWSXW#9ROWDJH 111111111111111111111111111111111111111111 “513(
• /RZ#7HPSHUDWXUH0'ULIW#&RHIILFLHQW#RI#2XWSXW#9ROWDJH11111 7<31#“433SSP2ƒ&
APPLICATIONS
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• 3RZHU#VRXUFH#IRU#KRXVHKROG#HOHFWULFDO#DSSOLDQFHV1
1
R1223N
BLOCK DIAGRAM
OSC
VIN
VOUT
EXT
Vref
PWM/VFM
CONTROL
Protection
Soft Start
GND
2
Chip Enable
CE
R1223N
SELECTION GUIDE
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Code
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Contents
6HWWLQJ#2XWSXW#9ROWDJH#+9287,=
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* =#633N+]/#ZLWKRXW#D#3:029)0#DOWHUQDWLYH#FLUFXLW/#5HVHW0W\SH#SURWHFWLRQ
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PIN CONFIGURATION
SOT-23-5
5
4
VIN
EXT
(mark side)
CE GND VOUT
1
2
3
3
R1223N
PIN DESCRIPTION
Pin No.
Symbol
Description
4
&(
5
*1'
*URXQG#3LQ
6
9287
3LQ#IRU#0RQLWRULQJ#2XWSXW#9ROWDJH
7
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8
9,1
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ABSOLUTE MAXIMUM RATINGS
Symbol
4
Item
Rating
Unit
48
9
9,1
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9(;7
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0316∼9,1.316
9
9&(
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0316∼9,1.316
9
9287
9287#3LQ#,QSXW#9ROWDJH
0316∼9,1.316
9
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088∼.458
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R1223N
ELECTRICAL CHARACTERISTICS
• R1223N**2A (,C,E,G) Output Voltage : Vo
Symbol
9,1
9287
∆92872∆7
IRVF
∆IRVF2∆7
Item
+7RSW 58ƒ&,
Conditions
2SHUDWLQJ#,QSXW#9ROWDJH
6WHS0GRZQ#2XWSXW#9ROWDJH
6WHS0GRZQ#2XWSXW#9ROWDJH
7HPSHUDWXUH#&RHIILFLHQW
2VFLOODWRU#)UHTXHQF\
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9,1 ;9/#9287 39→4189
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9,1 ;9/#9287 4189→39
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Unit
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8
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5
R1223N
• R1223N**2B (,D,F,H) Output Voltage : Vo
Symbol
9,1
9287
∆92872∆7
)RVF
∆IRVF2∆7
Conditions
2SHUDWLQJ#,QSXW#9ROWDJH
6WHS0GRZQ#2XWSXW#9ROWDJH
6WHS0GRZQ#2XWSXW#9ROWDJH
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9,1 ;9/#9287 39→4189
9&(/
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9,1 ;9/#9287 4189→39
7VWDUW
7SURW
9,1 46159/#9&( 39/#9287 39
9,1 ;9/#9(;7 :1<9/#9287 ;9/
9&( ;9
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9&( ;9
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Unit
4615
9
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R1223N
TEST CIRCUITS
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TYPICAL APPLICATIONS AND APPLICATION HINTS
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R1223N
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R1223N
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OPERATION of step-down DC/DC converter and Output Current
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i1
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topen
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ton
toff
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External Components
1.
Inductor
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Diode
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Lx Transistor
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12
R1223N
TYPICAL CHARACTERISTICS
1)
Output Voltage vs. Output Current
R1223N332H
L=27µH
R1223N152H
3.400
L=27µH
1.530
3.360
12V
3.340
8V
3.320
4.5V
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.380
3.300
3.280
3.260
3.240
1.520
1.510
1.500
13.2V
1.490
8V
5V
1.480
3.220
3.200
1E-05
0.0001
0.001
0.01
0.1
1
2.3V
1.470
1E-05
0.0001
Output Current IOUT(A)
0.01
0.1
1
Efficiency vs. Output Current
CD104-27µH
Si3443DV
R1223N332A(VIN=12V)
100
100
90
90
80
80
70
70
Efficiency η(%)
Efficiency η(%)
R1223N332A(VIN=4.5V)
60
50
40
30
50
40
30
20
10
10
1
10
100
0
0.1
1000
Output Current IOUT(mA)
R1223N332B(VIN=4.5V)
CD104-27µH
Si3443DV
90
80
80
70
70
Efficiency η(%)
100
60
50
40
30
30
10
1000
CD104-27µH
Si3443DV
40
20
Output Current IOUT(mA)
1000
50
10
100
100
60
20
10
10
R1223N332B(VIN=12V)
90
1
1
Output Current IOUT(mA)
100
0
0.1
CD104-27µH
Si3443DV
60
20
0
0.1
Efficiency η(%)
2)
0.001
Output Current IOUT(A)
0
0.1
1
10
100
1000
Output Current IOUT(mA)
13
R1223N
R1223N332C(VIN=12V) CD104-27µH
Si3443DV
CD104-27µH
100
100
90
90
80
80
70
70
Efficiency η(%)
Efficiency η(%)
R1223N332C(VIN=4.5V) Si3443DV
60
50
40
30
60
50
40
30
20
20
10
10
0
0.1
1
10
100
0
0.1
1000
CD104-27µH
100
90
90
80
80
70
70
Efficiency η(%)
Efficiency η(%)
100
60
50
40
30
30
10
100
0
0.1
1000
Output Current IOUT(mA)
CD104-27µH
90
80
80
70
70
Efficiency η(%)
Efficiency η(%)
100
90
60
50
40
30
14
100
1000
50
40
30
20
10
10
100
1000
CD104-27µH
Si3443DV
60
20
Output Current IOUT(mA)
10
R1223N502B(VIN=12V)
100
10
1
Output Current IOUT(mA)
R1223N502B(VIN=6.0V) Si3443DV
1
CD104-27µH
Si3443DV
40
10
0
0.1
1000
50
20
10
100
60
20
1
10
R1223N502A(VIN=12V)
R1223N502A(VIN=6.0V) Si3443DV
0
0.1
1
Output Current IOUT(mA)
Output Current IOUT(mA)
0
0.1
1
10
Output Current IOUT(mA)
100
1000
R1223N
R1223N502C(VIN=6.0V) CD104-27µH
100
90
90
80
80
70
70
Efficiency η(%)
Efficiency η(%)
100
60
50
40
60
50
40
30
30
20
20
10
10
0
0.1
1
10
100
0
0.1
1000
Ripple Voltage vs. Output Current
L=27µH
R1223N332A
100
1000
L=27µH
200
180
VIN4.5V
180
VIN6V
160
VIN8V
160
VIN8V
140
VIN12V
140
VIN12V
Ripple Voltage VRPP(mV)
Ripple Voltage VRPP(mV)
10
R1223N502A
200
120
100
80
60
40
120
100
80
60
40
20
20
0
0
1
10
100
1
1000
R1223N332B
10
100
1000
Output Current IOUT(mA)
Output Current IOUT(mA)
L=27µH
R1223N332H
L=27µH
200
200
180
VIN4.5V
160
Ripple Voltage VRPP(mV)
Ripple Voltage VRPP(mV)
1
Output Current IOUT(mA)
Output Current IOUT(mA)
3)
CD104-27µH
Si3443DV
R1223N502C(VIN=12V)
Si3443DV
VIN8V
140
VIN12V
120
100
80
60
40
20
180
VIN6V
160
VIN8V
140
VIN12V
120
100
80
60
40
20
0
0
1
10
100
Output Current IOUT(mA)
1000
1
10
100
1000
Output Current IOUT(mA)
15
R1223N
L=27µH
R1223N332C
180
VIN4.5V
180
VIN6V
160
VIN8V
160
VIN8V
140
VIN12V
140
VIN12V
Ripple Voltage VRPP(mV)
Ripple Voltage VRPP(mV)
200
120
100
80
60
40
20
120
100
80
60
40
20
0
0
1
10
100
1000
1
Output Current IOUT(mA)
4)
Oscillator Frequency vs. Input Voltage
L=27µH
R1223N152B
Oscillator Frequency fosc(kHz)
Oscillator Frequency fosc(kHz)
400
300
200
100
0
5
10
Output Voltage vs. Input Voltage
R1223N152B
L=27µH
500
400
300
200
100
0
15
0
5
10
15
Intput Voltage VIN(V)
L=27µH
L=27µH
R1223N152A
1.53
1.53
1.52
1.52
Output Voltage VOUT(V)
Output Voltage VOUT(V)
1000
600
Intput Voltage VIN(V)
1.51
1.50
1.49
1.48
1.47
1.51
1.50
1.49
1.48
1.47
0
5
10
Intput Voltage VIN(V)
16
100
R1223N152A
500
0
10
Output Current IOUT(mA)
600
5)
L=27µH
R1223N502C
200
15
0
5
10
Intput Voltage VIN(V)
15
R1223N
R1223N332A
L=27µH
3.36
3.34
3.34
Output Voltage VOUT(V)
Output Voltage VOUT(V)
R1223N332B
3.36
3.32
3.30
3.28
3.26
3.24
0
5
10
3.32
3.30
3.28
3.26
3.24
15
0
Intput Voltage VIN(V)
6)
Output Voltage vs. Temperature
R1223N332H
L=27µH
5
10
15
Intput Voltage VIN(V)
L=27µH
VIN=4.5V
L=27µH
VIN=2.7V
R1223N152B
1.51
3.33
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.32
3.31
3.30
3.29
1.50
1.49
1.48
3.28
3.27
-50
0
50
1.47
-50
100
Oscillator Frequency vs. Temperature
R1223N252A L=27µH
600
Oscillator Frequency fosc(kHz)
360
Oscillator Frequency fosc(kHz)
100
L=27µH
VIN=4.5V
R1223N332B
VIN=3.7V
340
320
300
280
260
240
-50
50
Temperature Topt (°C)
Temperature Topt (°C)
7)
0
550
500
450
400
-50
0
50
100
0
50
100
Temperature Topt (°C)
Temperature Topt (°C)
17
R1223N
8)
Supply Current vs. Temperature
R1223N332G
R1223N332H
140
100
130
Supply Current1(µA)
Supply Current1(µA)
90
80
VIN15V
70
VIN13.2V
60
VIN8V
120
VIN15V
110
VIN13.2V
100
VIN8V
90
80
70
50
-50
0
50
60
-50
100
Temperature Topt (°C)
9)
0
50
100
Temperature Topt (°C)
Soft-start time vs. Temperature
L=27µH
VIN=3.7V
R1223N252A
L=27µH
VIN=4.5V
R1223N332B
16
10
8
12
Soft-start Time (msec)
Soft-start Time (msec)
14
10
8
6
4
4
2
2
0
-50
6
0
50
100
0
-50
50
0
100
Temperature Topt (°C)
Temperature Topt (°C)
5.0
4.5
3.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.0
-50
VIN=4.5V
3.0
2.5
2.0
1.5
1.0
0.5
0.5
0
50
Temperature Topt (°C)
18
R1223N332B
4.0
Delay Time for Latch-type
Protection(msec)
Delay Time for Latch-type
Protection(msec)
10) Delay Time for Latch-type protection vs. Temperature
R1223N252A
VIN=3.7V
100
0.0
-50
0
50
Temperature Topt (°C)
100
R1223N
R1223N332H
5
5
4
4
Delay Time for Reset-type
Protection(msec)
Delay Time for Reset-type
Protection(msec)
11) Delay Time for Reset-type Protection vs. Temperature
R1223N332G
VIN=4.5V
3
2
1
0
-50
0
50
100
VIN=4.5V
3
2
1
0
-50
0
50
100
Temperature Topt (°C)
Temperature Topt (°C)
12) EXT “H” Output Current vs. Temperature
R1223N332B
16
EXT"H" Output Current(mA)
14
12
10
8
6
4
2
0
-50
0
50
100
Temperature Topt (°C)
13) EXT “L” Output Current vs. Temperature
R1223N332B
EXT"L" Output Current(mA)
30
25
20
15
10
5
0
-50
0
50
100
Temperature Topt (°C)
19
R1223N
14) Load Transient Response
VIN=5V
L=27µH
R1223N332A
3.6
3.3
3.5
3.2
3.4
3.1
3
500
2.9
2.7
2.6
2.5
2.4
0
0.0002
0.0004
0.0006
0.0008
3.3
3.2
3.1
500
3
2.9
2.8
2.7
0.1
0.001
2.6
0
Time (sec)
VIN=5V
L=27µH
R1223N332B
3.6
3.3
3.5
3.2
3.4
3.1
3
500
2.9
2.6
2.5
2.4
0
0.0002
0.0004
0.0006
0.0008
3.2
3.1
500
3
2.9
2.8
2.7
0.1
0.001
2.6
0
3.2
3.4
3.1
3
500
2.9
2.4
0
0.0002
0.0004
0.0006
Time (sec)
0.1
0.1
0.0008
0.1
0.001
VIN=5V
L=27µH
3.3
3.2
3.1
500
3
Output Current
IOUT(mA)
2.6
Output Voltage VOUT(V)
3.5
Output Current
IOUT(mA)
Output Voltage VOUT(V)
R1223N332C
3.3
2.5
20
VIN=5V
L=27µH
3.6
2.7
0.05
Time (sec)
3.4
2.8
VIN=5V
L=27µH
3.3
Time (sec)
R1223N332C
0.1
Output Current
IOUT(mA)
2.7
Output Voltage VOUT(V)
3.4
2.8
0.1
0.05
Time (sec)
Output Current
IOUT(mA)
Output Voltage VOUT(V)
R1223N332B
VIN=5V
L=27µH
Output Current
IOUT(mA)
2.8
Output Voltage VOUT(V)
3.4
Output Current
IOUT(mA)
Output Voltage VOUT(V)
R1223N332A
2.9
2.8
2.7
2.6
0
0.05
Time (sec)
0.1
0.1
R1223N
VIN=5V
L=27µH
R1223N332C
3.6
3.3
3.5
3.2
3.4
3.1
3
500
2.9
2.7
2.6
2.5
2.4
0
0.0002
0.0004
0.0006
0.0008
3.3
3.2
3.1
500
3
2.9
2.8
2.7
0.1
0.001
2.6
0
15) Turn-on Waveform
R1223N332A(VIN=10V,IOUT=0mA)
0.1
0.1
0.05
Time (sec)
Time (sec)
R1223N332A(VIN=5V,IOUT=0mA)
L=27µH
0.01
0
0.02
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
5
CE
Voltage(V)
0
Output Voltage VOUT(V)
10
CE
Voltage(V)
Output Voltage VOUT(V)
L=27µH
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
0
0.01
L=27µH
0.02
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
5
CE
Voltage(V)
0.01
0
Output Voltage VOUT(V)
10
CE
Voltage(V)
Output Voltage VOUT(V)
L=27µH
Time (sec)
0.02
R1223N332B(VIN=5V, IOUT=0mA)
R1223N332B(VIN=10V, IOUT=0mA)
0
0
Time (sec)
Time (sec)
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
VIN=5V
L=27µH
Output Current
IOUT(mA)
2.8
Output Voltage VOUT(V)
3.4
Output Current
IOUT(mA)
Output Voltage VOUT(V)
R1223N332D
0
0.01
0
0.02
Time (sec)
21
R1223N
R1223N332A(VIN=5V, IOUT=100mA)
R1223N332A(VIN=10V, IOUT=100mA)
10
0
0.01
Output Voltage VOUT(V)
L=27µH
0
0.02
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
5
CE
Voltage(V)
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
CE
Voltage(V)
Output Voltage VOUT(V)
L=27µH
0
Time (sec)
0.01
R1223N332B(VIN=5V, IOUT=100mA)
L=27µH
22
0.02
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
5
CE
Voltage(V)
0.01
Time (sec)
0
Output Voltage VOUT(V)
10
CE
Voltage(V)
Output Voltage VOUT(V)
L=27µH
0
0.02
Time (sec)
R1223N332B(VIN=10V, IOUT=100mA)
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
0
0
0.01
Time (sec)
0
0.02