R1221N45AA-TR-FA [RICOH]
Switching Controller, 0.025A, 360kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN;
| 型号： | R1221N45AA-TR-FA |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Switching Controller, 0.025A, 360kHz Switching Freq-Max, CMOS, PDSO6, SOT-23, 6 PIN 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
5
4
VOUT GND CE
(mark side)
EXT VDOUT
VIN
1
2
3
PIN DESCRIPTION
Pin No.
Symbol
(;7
9'287
9,1
Description
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Symbol
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ꢁꢉ
Unit
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R1221N
ELECTRICAL CHARACTERISTICS
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Symbol
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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
1.The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest
information thereon.
2.The materials in this document may not be copied or otherwise reproduced in whole or in part
without prior written consent of Ricoh.
3.Please be sure to take any necessary formalities under relevant laws or regulations before
exporting or otherwise taking out of your country the products or the technical information
described herein.
4.The technical information described in this document shows typical characteristics of and
example application circuits for the products. The release of such information is not to be
construed as a warranty of or a grant of license under Ricoh's or any third party's intellectual
property rights or any other rights.
5.The products listed in this document are intended and designed for use as genelectronic
components in standard applications (office equipment, telecommunication equ
measuring instruments, consumer electronic products, amusement equipt etc.). Those
customers intending to use a product in an application requiring extremualitand reliability,
for example, in a highly specific application where the failure or misoperation of the product
could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system,
traffic control system, automotive and transportation equipment, combustion equipment, safety
devices, life support system etc.) should first contact us.
6.We are making our continuous effort to improve the quality and reliability of our products, but
semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting rom such failure, customers should be careful enough
to incorporate safety measures in their design, such as redundancy feature, firecontainment
feature and fail-safe feature. We assume any liability or responsibility for any loss or
damage arising from misuse or inriate use of the products.
7.Anti-radiation design is noimplemented in the products described in this document.
8.Please contact Ricoh sals reprsentatives should you have any questions or comments
concerning the prducts or the technical information.
RIOMPANY,LTD. Electronic Devices Company
■Ricoh awarded ISO 14001 certification.
■
Ricoh presented wite Japan Management Quality Award for 1999.
The Ricoh Group was awarded ISO 14001 certification, which is an international standard for
environmental management systems, at both its domestic and overseas production facilities.
Our current aim is to obtain ISO 14001 certification for all of our business offices.
Ricoh continually strives to promote customer satisfaction, and shares the achievements
of its management quality improvement program with people and society.
Ricoh completed the organization of the Lead-free production for all of our products.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that
will be shipped from now on comply with RoHS Directive.
http://www.ricoh.com/LSI/
RICOH COMPANY, LTD.
Electronic Devices Company
● Higashi-Shinagawa Office (International Sales)
3-32-3, Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-8655, Japan
Phone: +81-3-5479-2857 Fax: +81-3-5479-0502
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Phone: +82-2-2135-5700 Fax: +82-2-2135-5705
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Phone: +886-2-2313-1621/1622 Fax: +886-2-2313-1623
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