SI-8033TM-TL [SANKEN]
Switching Regulator/Controller;
| 型号： | SI-8033TM-TL |
| 厂家： | 
SANKEN ELECTRIC |
| 描述： | Switching Regulator/Controller |
| 文件： | 总15页 (文件大小：525K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
■General Descriptions
■Package---TO252-5
SI-8000TM series has 300kHz oscillation frequency, so
it contributes miniaturization of a chalk coil.
Therefore, it realizes a compact and high efficient
power supply together with TO 252-5 package
(compatible:SC-63) .
SI-8000TM series has the function required for
switching regulators and protection circuits such as
over-current, and overheating.
With only four discrete components, it realizes a high
efficient switching regulator without adjustment.
1.5A output current by compact power surface mount
package.
■Applications
●DVD Recorder、FPD TV
●OA equipment, such as a printer
●On-board local power supply
■Key Specifications
■Features
SI-8008T
M
SI-8033T
M
SI-8050T
M
SI-8120T
●
●
●
1.5A output current by compact power surface mount package.
High Efficiency 81% (at VIN=15V, Io=0.5A,Vo=5V)
Requires only four discrete components. (C3: required for soft
start.)
M
(ADJ Type)
Input
43V
0 to 1.5A
Voltage
Output
Current
Output
Voltage
●
●
●
●
Built-in Oscillation circuit
(oscillation frequency : 300kHz (TYP))
Constant current type overcurrent protection and overheating
protection.
Soft start function. (ON/OFF function available. Output OFF at
Low level.)
0.8V
(REF Voltage)
3.3V
76%
5.0V
81%
12.0V
87%
Efficiency
(TYP)
81%
(5V Set-up)
Low consumption current at Output OFF.
Typical Connection
C1：220μF
C2：470μF
C3：1μF
(At the time of soft start functional use)
L1：47μH
Di：SFPB66(Sanken)
.
Sanken Electric Co.,Ltd.
I02-001EA-050910
http://www.sanken-ele.co.jp/en/
1/15
DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
1. Scope
The present specifications shall apply to a DC-DC buck converter SI-8008TM.
2. Outline
Classification
Structure
Semiconductor IC (monolithic IC)
Plastic package (transfer mold)
・DC voltage regulator
・Power supplies for telecommunication equipment , office equipment etc ,ON-board local regulator
・Output voltage regulator at secondary stage of switch mode power supply
Applications
3. Absolute maximum ratings
3-1 Absolute maximum ratings
Characteristic
Symbol
VIN
Ratings
43
Units
V
Remarks
DC input voltage
Glass‐epoxy board mounting in 900square
㎜, copper area 4.3%
Tjmax=125℃
Glass‐epoxy board mounting in 900square
㎜, copper area 50%
Power dissipation １
Power dissipation２
１.06
Pd1
Pd2
W
W
1.65
Tjmax=125℃
Thermal protection circuit is built-in
in this product and when junction
temperature rises to 130℃ or
℃
Junction temperature
Tj
-40~150
higher, it may be caused to operate
Recommended max. junction
temperature at operation is 125℃.
-40～150
℃
Storage temperature
Tstg
θj-c
θj-a
６
℃/W
℃/W
Thermal resistance (junction-case)
Glass‐epoxy board mounting in 900square
㎜, copper area 4.3%
Thermal resistance
(junction-ambient air)
95
.
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
3-2 Recommended operating conditions
Ratings
Characteristic
Symbol
VIN
Units
V
Remarks
MIN
*1 Vo+3
0.8～24
MAX
40
Io=0～1.5A
DC input voltage range
DC output voltage range
DC output current range
Vo
Io
V
A
0～1.5
*2
VIN≧Vo+3V
Operating junction temperature
range
-40～125
-40～125
℃
℃
Tjop
Top
Operating temperature range
*2
*1 The minimum value of DC input voltage range is 8V when output is less than 5V,
VO+3,when the output is more than 5V.In the case of VIN=Vo+2～Vo+3V , it is set to
Io=1A MAX.
*2 To be used within the allowable package power dissipation characteristics (refer to P6).
4. Electrical characteristics
4-1 Electrical characteristics (Ta=25℃、Vo=5V adjusted R1=4.2kΩ,R2=0.8kΩ)
Limits
TYP
Characteristic
Reference voltage
Symbol
VADJ
Units
V
Test conditions
MIN
MAX
0.816
VIN=15V，IO=0.1A
0.784
0.800
VIN=15V
IO=0.1A,Tc=0~100℃
，
⊿VREF/⊿T
Reference voltage temperature coefficient
±0.1
mV/℃
Efficiency *3
81
300
60
%
VIN=15V,IO=0.5A
η
fo
Operating frequency
VIN=15V，IO=0.5A
kHz
mV
Line regulation
VIN=10～30V，IO=0.5A
VIN=15V，IO=0.2～1.5A
VIN=15V
VLine
VLoad
IS
80
40
Load regulation
10
mV
A
Over current protection starting current
1.6
Low level voltage
ON/OFF
VSSL
ISSL
Iq
0.5
40
V
terminal *4
Flow-out current at low
level voltage
μA
mA
10
6
VSSL=0V
Quiescent current 1
Quiescent current 2
VIN=15V，IO=0A
VIN=15V
VSS=0V
μA
Iq(off)
200
400
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
*3 Efficiency is calculated by the following equation.
VO･IO
VIN･IIN
η(%)=
×100
*4 No.5 terminal is a SS terminal to enable soft start by connecting a capacitor. The output can
be turned on and off by using a SS terminal. The output is stopped by decreasing the SS
terminal voltage below VSSL and in order to perform ON/OFF operation of Vout, it is required
to connect NPN transistor or the output of open collector type TTL between No.5 terminal
and GND.
In case that both soft and Vout ON/OFF are used, a protection measure such as limitation of
current is required, as the discharge current of C3 flows across a transistor for ON/OFF
operation, if the capacitance of C3 large. As a pull-up type resistor is provided inside the IC,
no external voltage can be applied. In case of no use of ON/OFF, please keep it open.
SI-8000TM
SI-8000TM
SI-8000TM
5
SS
5
SS
5
SS
C3
C3
Soft start
+VO.ON/OFF
VO.ON/OFF
Soft start
4-2 Typical characteristics (Ta=25℃)
（１）Efficiency
SI-8008TM Efficiency Curve
Vo=5V Adjusted：R1=4.2kOhm, R2=0.8kOhm
85
80
75
70
65
60
55
VIN=
8v,10v,15v,20v,30v,
40v
0
0.5
1
1.5
IoutꢀA
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
□ Output Voltage: 5V Adjusted (R2=0.8k[Ohm])
(2) Low Voltage Behavior
6
(5) Quiescent Current
10
5
8
6
4
2
４
Io=0A
3
I
O
=0A、
0.1A
0.5A
1.0A
1.5A
2
1
0
10
入力電圧 VIN [V]
(6) Thermal Protection
20
30
40
0
2
4
6
8
10
入力電圧 VIN [V]
(3) Load Regulation
6
5.06
5.04
5.02
5
V
IN=40V
30V
5.00
4.98
4.96
4.94
4.92
4.90
4
20V
15v
VIN=8V
3
10V
8V
Io=0.01A
2
4.88
4.86
4.84
1
TSD OFF
TSD ON
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
Output Current IO [A]
(4) Circuit Current at Output OFF
20 40 60 80 100 120 140 160 180
Junction Temperature Tj [℃]
0
400
Vss=0V
300
200
100
0
10
20
30
40
Input Voltage VIN [V]
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
4-2 Power Dissipation
SI-8000TM Series Power Dissipation
⎛
⎞
⎛
⎞
VO
100
⎜
⎜
⎟ ⎜
−1 −VF ⋅ IO 1−
⎟
⎟
PD = VO ⋅ IO
Tjmax=125℃
⎟
⎜
ηx
VIN
⎝
⎠
⎝
⎠
VO: Output voltage
VIN: Input voltage
IO: Output current
Glass‐epoxy board mounting in 30×30 ㎜
ηx: Efficiency（％）
VF: Diode forward
voltage
SFPB66･･0.5V
(IO=1.5A)
copper area
Ambient Temperature Ta [℃]
Note1：As the efficiency varies subject to the input voltage and output current, it shall be obtained
from the efficiency curve in page 4 and substituted in percent.
Note2：Thermal design for Di shall be made separately.
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
Reference data
SI-8000TM Copper area on PC board vs. thermal resistance.
Area of PC board：30×30mm
100
90
80
70
60
50
40
10
100
1000
Copper area on PC board （ｍｍ2）
Copper area on PC board vs. Power dissipation
Tj=100℃ Area of PC board：30×30mm
1.5
1
Ta=25℃
40℃
60℃
0.5
0
85℃
10
100
1000
Copper area on PC board （ｍｍ2）
・Calculation of junction temperature
The junction temperature can be obtained from the following equation using the Tc that is measured by
thermocouple.
Tc measurement point
Tj = P
D
×θj − C + T
C
(θj-ｃ＝6℃／W)
●
5. Block diagram (Connection diagram)
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
SI-8008TM
L
VO
C2
SW
Vin
1
IN
2
Di
C1
Over
Current
Protection
PReg
SS
5
ON/
OFF
Soft･
Start
Latch
&
Driver
Reset
R1
C3
Oscillator
Comparator
Error Amp
ADJ
Thermal
Protection
4
R2
Reference
Voltage
GND
3
Di：SFPB66(made by sanken)
Recommended pattern
The example of the solder pattern.
6.0
GND
8000TM
C1
C2
6.1
C3
＋
＋
IN
R1
R2
SW
2.4
2.5
5.88
Di
Vout
L
1.27
0.47
0.8
*The circuit board layout is recommended as follows:
①Other components are connected as close as possible to the SI-8008TM.
②Each ground of all components is connected at one point area.
6. Example application circuit
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I02-001EA-050910
DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
6-1 Standard circuit diagram
L 47uH
C1：220μF
C2：470μF
C3：1μF
1
2
IN
SW
VO
VIN
SI-8008TM
R1
4
ADJ
SS
GND
3
C1
220uF
C2
470uF
R2
(If soft start function is used)
Di
5
IADJ
L1：47μH
C3
GN
D
GND
Di：SFPB66
(Made by Sanken)
Diode Ｄｉ
・The shottky-barrier diode must be used for Di. If other diodes like fast recovery diodes are used, IC
may be destroyed because of the reverse voltage applied by the recovery voltage or ON voltage.
Choke coil Ｌ1
・If the winding resistance of the choke coil is too high, the efficiency may go down to the extent that
it is out of the rating.
・As the overcurrent protection start current is approx. 2.5A, attention must be paid to the heating of
the choke coil by the magnetic saturation due to overload or short-circulated load.
Capacitor Ｃ1，Ｃ2，Ｃ3
・As large ripple currents flow across C1 and C2, capacitors with high frequency and low impedance
for SMPS must be used. Especially when the impedance of C2 is high, the switching waveform may
not be normal at low temperature. Please use neither OS capacitor nor tantalum capacitor which
causes an abnormal oscillation for the C2.
・C3 is a capacitor for soft start. In case soft start function is not used, please keep No.5 terminal open.
A pull-up resistor is provided inside the IC.
Resister R1，R2
・R1，R2 is resistor to the Output Voltage. IADJ set to become 1mA. Moreover, R1，R2 is calculated
by the following expression.
VOUT −VADJ
)
(
VOUT − 0.8
)
VADJ
0.8
R1 =
=
(
Ω
)
，R2 =
=
≒0.8k
Ω
( )
IADJ
1×10−3
IADJ 1×10−3
◎In order to have optimum operating condition, each component must be laid out with the minimum
distance.
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
7 Package information
7-1 Package type and dimensions
８００８ＴＭ
ＳＫ
１
２
３
４
５
*1 Type No
*2 Logo mark
*3 Lot Number
Pin assignment
1：IN
Products Weight：Approx.0.33g
1st letter：The last digit of year
2nd letter：Month
2：SW
1 to 9 for Jan. to Sept.
3：GND
4：ADJ
5：SS
O for Oct. N for Nov. D for Dec.
3rd letter：week(Arabic Numerical)
*4 Administer number (four digit)
7-2 Appearance
The body shall be clean and shall not bear any stain, rust or flaw.
7-3 Marking
The type number and lot number shall be clearly stamped by laser on the body so that they
cannot be erased easily.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
8. Packing specifications
4.0±0.1
φ1.5
Unit：mm
0.3
2.0±0.1
1.7
0.3
10.5
7.50
16.0
0.25
8.0
φ1.7
Direction of Reel
7.1
B:MIN 1.60
2.65
C
D
C:13.0±0.5
+2
+3
W1
W2 MAX
W1
-0
-0.5
16.4 ㎜
22.4 ㎜
16.4 ㎜
Quantity：3000pcs／reel
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
9. Cautions and warnings
9-1 Parallel operation
The parallel operation to increase the current is not available.
9-2 Thermal protection
The SI-8000TM series has a thermal protection circuit. This circuit keeps the IC from the fever by
the over load. But this circuit cannot guarantee the long-term reliability against the continuously over
load status.
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
<Worldwide Contacts>
Asia Pacific
China
Sanken Electric Hong Kong Co., Ltd.
Suite 1026 Ocean Centre, Canton Road, Tsimshatsui, Kowloon, Hong Kong
Tel: 852-2735-5262
Fax: 852-2735-5494
Sanken Electric (Shanghai) Co., Ltd.
Room3202, Maxdo Centre, Xingyi Road 8, Changning district, Shanghai, China
Tel: 86-21-5208-1177
Fax: 86-21-5208-1757
India
Saket Devices Pvt. Ltd.
Office No.25, 2nd Floor, Bandal - Dhankude Plaza, Near PMT Depot, Paud Road, Kothrud, Pune - 411 038, India
Tel: 91-20-5621-2340
Fax: 91-20-2528-5459
Japan
Sanken Electric Co., Ltd. Overseas Sales Headquaters
Metropolitan Plaza Bldg. 1-11-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-0021, Japan
Tel: 81-3-3986-6164
Fax: 81-3-3986-8637
Korea
Sanken Electric Korea Co., Ltd.
Mirae Asset Life Bldg. 6F, 168 Kongduk-dong, Mapo-ku, Seoul, 121-705, Korea
Tel: 82-2-714-3700
Fax: 82-2-3272-2145
Singapore
Sanken Electric Singapore Pte. Ltd.
150 Beach Road, #14-03 The Gateway West, Singapore 189720
Tel: 65-6291-4755
Fax: 65-6297-1744
Taiwan
Taiwan Sanken Electric Co., Ltd.
Room 1801, 18th Floor, 88 Jung Shiau East Road, Sec. 2, Taipei 100, Taiwan R.O.C.
Tel: 886-2-2356-8161
Fax: 886-2-2356-8261
Sanken Electric Co.,Ltd.
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
Europe
France
Allegro MicroSystems Europe
Les Pleiades, Park Nord Annecy, 74370 Metz-Tessy, France
Tel: 33-450512359
Fax: 33-450512083
United Kingdom
Allegro MicroSystems Europe Limited
Balfour House, Churchfield Road, Walton-on-Thames, Surrey KT12 2TD, U.K.
Tel: 44-1932-253355
Fax: 44-1932-246622
North America
United States
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Worcester, Massachusetts 01606, U.S.A.
Tel: 1-508-853-5000
Fax: 1-508-853-3353
Allegro MicroSystems, Inc. (Southern California)
14 Hughes Street, Suite B105, Irvine, CA 92618
Tel: 1-949-460-2003
Fax: 1-949-460-7837
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DC/DC Step-Down Converter IC
SI-8000TM Series
September 2005
CAUTION / WARNING
●The information in this publication has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for inaccuracies.
● Sanken reserves the right to make changes without further notice to any products herein in the interest of
improvements in the performance, reliability, or manufacturability of its products.
Before placing an order, Sanken advises its customers to obtain the latest version of the relevant information to verify
that the information being relied upon is current.
● Application and operation examples described in this catalog are quoted for the sole purpose of reference for the use
of the products herein and Sanken can assume no responsibility for any infringement of industrial property rights,
intellectual property rights or any other rights of Sanken or any third party which may result from its use.
● When using the products herein, the applicability and suitability of such products for the intended purpose or object
shall be reviewed at the users’ responsibility.
● Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure nd defect
of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own
risk, preventative measures including safety design of the equipment or systems against any possible injury, death,
fires or damages to the society due to device failure or malfunction.
● Sanken products listed in this catalog are designed and intended for the use as components in general purpose
electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring
equipment, etc.). Before placing an order, the user’s written consent to the specifications is requested.
When considering the use of Sanken products in the applications where higher reliability is required (transportation
equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various
safety devices, etc.), please contact your nearest Sanken sales representative to discuss and obtain written
confirmation of your specifications. The use of Sanken products without the written consent of Sanken in the
applications where extremely high reliability is required (aerospace equipment, nuclear power control systems, life
support systems, etc.) is strictly prohibited.
● Anti radioactive ray design is not considered for the products listed herein.
● This publication shall not be reproduced in whole or in part without prior written approval from Sanken.
●This is notification that you, as purchaser of the products/technology, are not allowed to perform any of the following:
1. Resell or retransfer these products/technology to any party intending to disturb international peace and security.
2. Use these products/technology yourself for activities disturbing international peace and security.
3. Allow any other party to use these products/technology for activities disturbing international peace and security.
Also, as purchaser of these products/technology, you agree to follow the procedures for the export or
transfer of these products/technology, under the Foreign Exchange and Foreign Trade Law, when you
export or transfer the products/technology abroad.
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