R1221N34AG-TR-FA [RICOH]
Switching Controller, 0.025A, 360kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN;型号: | R1221N34AG-TR-FA |
厂家: | RICOH ELECTRONICS DEVICES DIVISION |
描述: | Switching Controller, 0.025A, 360kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN 开关 光电二极管 |
文件: | 总23页 (文件大小:358K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Step-down DC/DC Converter Controller
with Voltage Detector
NO. EA-066-120404
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1
R1221N
BLOCK DIAGRAM
OSC
VIN
VOUT
EXT
Vref
PWM/VFM
CONTROL
Protection
Soft Start
Chip Enable
CE
Vref
VDOUT
GND
SELECTION GUIDE
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2
R1221N
PIN CONFIGURATION
SOT-23-6W
6
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(mark side)
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1
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3
PIN DESCRIPTION
Pin No.
Symbol
(;7
9'287
9,1
Description
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ELECTRICAL CHARACTERISTICS
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• R1221NxxxB (D,F,H) Output Voltage : Vo, Detector Threshold : VD
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Typ. Max. Note* Unit
Symbol
9,1
Item
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Conditions
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TYPICAL APPLICATIONS AND APPLICATION HINTS
PMOS
L
V
CC
EXT
VIN
VOUT
SD1
COUT
R1
CE
C
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Reset/
VDOUT
GND
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OPERATION of Step-down DC/DC Converter and Output Current
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<Basic Circuit>
<Current through
I
IL
i1
IOUT
ILmin
topen
L
LxTr
SD
VOUT
VIN
i2
CL
ton
toff
T=1/fosc
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IORZVꢅ
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• Discontinuous Conduction Mode and Continuous Conduction Mode
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9
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Output Current and Selection of External Components
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ZKHUHLQ"ꢀSHDNꢀFXUUHQWꢀWKDWꢀIORZVꢀWKURXJKꢀ/"ꢀ/[7U"ꢀDQGꢀ6'ꢀLVꢀDVꢀIROORZVꢍ
,/PD[ ,287C,53ꢄꢂꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅꢅ (TXDWLRQꢀꢑ
10
R1221N
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External Components
1. Inductor
6HOHFWꢀDQꢀLQGXFWRUꢀWKDWꢀSHDNꢀFXUUHQWꢀGRHVꢀQRWꢀH[FHHGꢀ,/PD[ꢅꢀ,IꢀODUJHUꢀFXUUHQWꢀWKDQꢀDOORZDEOHꢀFXUUHQWꢀIORZV"ꢀPDJꢃ
QHWLFꢀVDWXUDWLRQꢀRFFXUVꢀDQGꢀPDNHꢀWUDQVIRUPꢀHIILFLHQF\ꢀZRUVHꢅ
:KHQꢀWKHꢀORDGꢀFXUUHQWꢀLVꢀVDPH"ꢀWKHꢀVPDOOHUꢀYDOXHꢀRIꢀ/ꢀLVꢀXVHG"ꢀWKHꢀODUJHUꢀWKHꢀULSSOHꢀFXUUHQWꢀLVꢅ
3URYLGHGꢀWKDWꢀWKHꢀDOORZDEOHꢀFXUUHQWꢀLVꢀODUJHꢀLQꢀWKDWꢀFDVHꢀDQGꢀ'&ꢀFXUUHQWꢀLVꢀVPDOO"ꢀWKHUHIRUH"ꢀIRUDUJHꢀRXWSXWꢀFXUUHQW"
HIILFLHQF\ꢀLVꢀEHWWHUꢀWKDQꢀXVLQJꢀDQꢀLQGXFWRUꢀZLWKꢀDꢀODUJHꢀYDOXHꢀRIꢀ/ꢀDQGꢀYLFHꢀYHUVD"
2
Diode
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5HYHUVHꢀYROWDJHꢀUDWLQJꢀVKRXOGꢀEHꢀPRUHꢀWKDQꢀ9,1ꢀDQGꢀFXUUHQWꢀUDWLQJꢀVKRXOGEHꢀHTXDRUꢀPRUHꢀWKDQꢀ,/PD[ꢅ
ꢆꢅ &DSDFLtRU
$VꢀIRUꢀ&,1"ꢀXVHꢀDꢀFDSDFLWRUꢀZLWKꢀORZꢀ(65ꢀꢇ(TXLYDOHQW6HULHVꢀ5VLVWDFH4ꢀDQGꢀDꢀFDSDFLW\ꢀRIꢀDWꢀOHDVWꢀꢁꢈ)ꢀIRUꢀVWDEOH
RSHUDWLRQꢅꢀ&287ꢀFDQꢀUHGXFHꢀULSSOHꢀRIꢀ2XWSXWꢀ9ROWDJH"ꢀWKHUHIRUꢀꢌꢑꢀWRꢀꢁꢈꢈ)ꢀWDQWDOXPꢀW\SHꢀLVꢀUHFRPPHQGHGꢅ
4. Lx Transistor
3FKꢀ3RZHUꢀ026ꢀ)(7ꢀLVꢀUHTXLUHGꢀIRUꢀWKL
,WVꢀEUHDNGRZQꢀYROWDJHꢀEHWZHHQꢀJDWHꢀDQGVKRXOGꢀEHꢀDꢀIHZꢀYROWꢀKLJKHUꢀWKDQꢀWKHꢀLQSXWꢀYROWDJHꢅ
,QꢀWKHꢀFDVHꢀRIꢀWKHꢀLQSXWꢀYROWDJHꢀꢀORZ"ꢀWRꢀWXUQꢀRQꢀ026ꢀ)(7ꢀFRPSOHWHO\"ꢀVHOHFWꢀDꢀ026ꢀ)(7ꢀZLWKꢀORZꢀWKUHVKROGꢀYROWꢃ
DJHꢅ
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IRUꢀJRRGꢀHIILF
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HIILFLHQF\ꢅ
0D[LPXPꢀFXRXVꢀGUDLQꢀFXUUHQWꢀRIꢀ026ꢀ)(7ꢀVKRXOGꢀEHꢀODUJHUꢀWKDQꢀSHDNꢀFXUUHQW"ꢀ,/PD[ꢅ
11
R1221N
TYPICAL CHARACTERISTCS
1) Output Voltage vs. Output Current
R1221N15xH
L=27µH
1.520
1.515
1.510
1.505
1.500
1.495
1.490
1.485
1.480
13.2V
8V
5V
1E-05 0.0001 0.001
1
1
Output CurOUT (A)
2) Efficiency vs. Output Current
CD104-27µH
Si3443DV
CD104-27µH
Si3443DV
R1221N33AA(VIN=12V)
R1221N33AA(VIN=4.5V)
100
100
90
80
70
60
50
90
80
7
60
50
40
30
20
40
30
20
10
0
0.1
10
0
0.1
1
10
00
1000
1
10
100
1000
put Curent IOUT (mA)
Output Current IOUT (mA)
CD104-27µH
Si3443DV
CD104-27µH
Si3443DV
R12(VIN=4.5V)
R1221N33AB(VIN=12V)
100
80
100
80
60
60
40
20
0
40
20
0
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current IOUT (mA)
Output Current IOUT (mA)
12
R1221N
CD104-27µH
Si3443DV
CD104-27µH
Si3443DV
R1221N33AC(VIN=4.5V)
R1221N33AC(VIN=12V)
100
90
80
70
60
50
100
90
80
70
60
50
40
30
20
40
30
20
10
0
0.1
10
0
0.1
1
10
100
1000
1
10
100
1000
Output Current
Output Current IOUT (mA)
CD104-27µH
Si3443DV
CD104-27µH
Si3443DV
R1221N50xA(VI=12V)
R1221N50xA(VIN=6.0V)
100
80
100
80
60
60
40
20
0
40
20
0
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current IOUT (mA)
Output Current IT (mA)
CD104-27µH
Si3443DV
CD104-27µH
Si3443DV
R1221N50xB(VIN=6.0V)
R1221N50xB(VIN=12V)
100
80
100
80
60
60
40
20
0
40
20
0
0.1
1
10
100
1000
0.1
1
10
100
1000
Output Current IOUT (mA)
Output Current IOUT (mA)
13
R1221N
CD104-27µH
Si3443DV
CD104-27µH
Si3443DV
R1221N50xC(VIN=6.0V)
R1221N50xC(VIN=12V)
100
80
100
80
60
60
40
20
0
40
20
0
0.1
1
10
100
1000
0.1
1
10
1000
Outpur Current IOUT (mA
Outpur Current IOUT (mA)
3) Ripple Voltage vs. Output Current
L=27µH
C=47µF(Ta)
L=27µH
C=47µF(Ta)
R1221N33AA
R122133AA
200
200
180
180
160
0
120
100
V
V
V
IN=6V
IN=8V
IN=12V
V
V
V
IN=4.5V
160
140
120
100
IN=8V
IN=12V
80
60
80
60
40
20
0
40
20
0
1
10
100
1000
1
10
100
1000
Output Current U(mA
Output Current IOUT (mA)
L=27µH
C=47µF(Ta)
L=27µH
C=47µF(Ta)
21N33AB
R1221N50xB
200
180
160
140
120
100
200
180
160
140
120
100
V
V
V
IN=4.5V
IN=8V
VIN=6V
VIN=8V
VIN=12V
IN=12V
80
60
80
60
40
20
0
40
20
0
1
10
100
1000
1
10
100
1000
Output Current IOUT (mA)
Output Current IOUT (mA)
14
R1221N
L=27µH
C=47µF(Ta)
L=27µH
C=47µF(Ta)
R1221N50xC
R1221N33AC
200
180
160
140
120
100
200
180
160
140
120
100
VIN=6V
VIN=8V
VIN=12V
V
V
V
IN=4.5V
IN=8V
IN=12V
80
60
80
60
40
20
0
40
20
0
1
10
1000
1
10
100
1000
Output Cent IOU)
Output Current IOUT (mA)
4) Oscillator Frequency vs. Input Voltage
R1221N15xB
R1221N15xA
L=27µH
L=27µH
600
600
500
40
300
200
100
0
500
400
300
200
100
0
0
5
10
15
0
5
10
15
Inut VoltagVIN (V)
Input Voltage VIN (V)
5) Outpvs. Input Voltage
R1221N15xB
R1221N15xA
L=27µH
L=27µH
1.53
1.53
1.52
1.51
1.50
1.49
1.48
1.47
1.52
1.51
1.50
1.49
1.48
1.47
0
5
10
15
0
5
10
15
Input Voltage VIN (V)
Input Voltage VIN (V)
15
R1221N
L=27µH
R1221N33AA
L=27µH
R1221N33AB
3.36
3.34
3.36
3.34
3.32
3.30
3.28
3.32
3.30
3.28
3.26
3.24
3.26
3.24
0
5
10
15
0
5
10
15
Input Voltage VIN (V)
Input Voltage VIN (V)
6) Output Voltage vs. Temperature
27µH
IN=2.7V
V
R1221N33AH
R1221B
L=27µH
3.31
1.51
1.50
1.49
1.4
1.47
3.30
3.29
3.28
3.27
-50
0
50
-50
0
50
100
Temperature Topt (°C)
Temperature Topt (°C)
7) Detector Threshold vs. Temperature
R1221N25xAVD=2.V)
VIN=6V
R1221N15xB(VD=1.2V)
V
IN=6V
2.01
1.22
2.00
1.21
1.99
1.98
1.97
1.20
1.19
1.18
-50
50
Temperature Topt (°C)
100
-50
50
Temperature Topt (°C)
100
0
0
16
R1221N
R1221N33AB(VD=3.0V)
VIN=6V
3.06
3.04
3.02
3.00
2.98
2.96
2.94
-50
50
Temperature Topt (°C)
100
0
8) Oscillator Frequency vs. Temperature
L=27µH
VIN=3.7V
L=27µH
R1221N33AB
R1221N25xA
V
IN=4.5V
600
360
340
320
300
280
550
500
450
400
260
240
-50
50
100
-50
50
Temperature Tpt (°C)
100
0
0
Temperature Topt (°C)
9) Supply Current vs. Temperaure
R1221N33AH
R1221N33AG
135
100
90
80
70
60
50
130
125
120
VIN=15V
115
110
V
V
V
IN=15V
VIN=13.2V
VIN=8V
IN=13.2V
IN=8V
105
100
95
90
-50
50
Temperature Topt (°C)
100
-50
50
100
0
0
Temperature Topt (°C)
17
R1221N
10) Soft-start Time vs. Temperature
L=27µH
IN=4.5V
L=27µH
VIN=3.7V
R1221N33AB
V
R1221N25xA
10
12
10
8
8
6
4
2
0
6
4
2
-50
50
100
-50
50
Temperature Topt (°C)
100
0
0
Temperatur(°C)
11) Delay Time for Latch-type Protection vs. Temperature
R1221N33AB
VIN=4.5V
1221N25xA
VIN=3.7V
4.0
4.0
3.5
3.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.
2.0
1.5
1.0
0.5
0.0
-50
50
Temperature opt (°C)
100
0
-50
50
100
0
Temperature Topt (°C)
12) Delay Time ype Protection vs. Temperature
21N33AH
R1221N33AG
V
IN=4.5V
V
IN=4.5V
5
5
4
3
2
1
0
4
3
2
1
0
-50
-50
50
Temperature Topt (°C)
100
0
50
Temperature Topt (°C)
100
0
18
R1221N
13) VD Output Delay Time vs. Temperature
R1221N33AB
R1221N25xA
VIN=8.0V
VIN=8.0V
6
6
5
4
3
2
5
4
3
2
1
0
1
0
-50
50
Temperature Topt (°C)
100
-50
Tempe Topt (°C)
100
0
0
14) EXT"H" Output Current vs. Temperature
R1221N33AB
16
14
12
10
8
6
4
2
0
-50
50
Tempeature Tot (°C)
100
0
15) EXT urrent vs. Temperature
R1221N33AB
30
25
20
15
10
5
0
-50
50
Temperature Topt (°C)
100
0
19
R1221N
16) VDOUT "L" Output Current vs. Temperature
R1221N33AD
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-50
50
Temperature Topt (°C)
100
0
17) Load Transient Response
VIN=5V
V
IN=5V
L=27µH
R1221N33AA
1221N3AA
L=27µH
3.4
3.2
3
3.6
3.5
3.4
.3
500
0.1
500
0.1
0
0.0005
0001
0
0.05
0.1
Time (sec
Time (sec)
V
IN=5V
V
IN=5V
1N33AB
L=27µH
R1221N33AB
L=27µH
3.4
3.6
3.3
3.2
3.5
3.4
3.1
3
3.3
500
0.1
500
0.1
0
0
0.05
0.1
0.0005
0.001
Time (sec)
Time (sec)
20
R1221N
VIN=5V
V
IN=5V
R1221N33AC
L=27µH
L=27µH
R1221N33AC
3.4
3.6
3.3
3.2
3.5
3.4
3.1
3
3.3
2.9
2.8
500
0.1
500
0.1
0
0
0.0005
0.001
0.05
0.1
Time (sec)
Time (sec)
VIN=5V
VIN=5V
R1221N33AD
L=27µH
L=27µH
R1N3AD
3.4
3.6
3.3
3.2
3.5
3.4
3.1
3
3.
500
0.1
500
0.1
2.9
0
0
0.05
0.1
0.0005
01
Time (sec)
Time (sec)
18) Turn-on Waveform
R1N33AA(VIN=10VIOUT=0mA)
L=27µH
R1221N33AA(VIN=5V,IOUT=0mA)
L=27µH
3.5
3
3.5
3
2.5
2.5
2
2
1.5
1.5
1
0.5
0
1
0.5
0
10
5
0
0
-0.01
0
0.01
-0.01
0
0.01
0.02
0.02
Time (sec)
Time (sec)
21
R1221N
R1221N33AB(VIN=10V,IOUT=0mA)
L=27µH
R1221N33AB(VIN=5V,IOUT=0mA)
L=27µH
3.5
3
3.5
3
2.5
2.5
2
2
1.5
1.5
1
0.5
0
1
0.5
0
10
5
0
0
-0.01
0
0.01
-0.01
0
0.01
0.02
0.02
Time (sec)
Time (sec)
R1221N33AA(VIN=10V,IOUT=100mA)
L=27µH
R1221N33AA(VIN=5V,=100A)
L=27µH
3.5
3
3.5
3
2.5
2.5
2
2
1.5
1.5
1
0.5
0
1
0.5
0
10
5
0
-0.01
0
0.01
-0.01
0
0.01
0.0
0.02
Time (sec)
Time (sec)
R1221N33AB(VIN=5V,IOUT=100mA)
L=27µH
R1221N33AB(VIN=10V,IOT=100A)
L=27µH
3.5
3
3.5
3
2.5
2.5
2
2
1.5
1.5
1
0.5
0
1
0.5
0
5
10
0
0
-0.01
0
0.01
-0.01
0
0.01
0.02
0.02
Time (sec)
Time (sec)
22
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discontinuation of production without notice for reasons such as improvement. Therefore, before
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相关型号:
R1221N34AH-TR-FA
Switching Controller, 0.025A, 600kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN
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