SI8005Q-TL
更新时间：2024-10-20 10:19:20
品牌：SANKEN
描述：Step-Down Switching Regulator with Current-Mode Control
概述
规格参数
数据手册SI8005Q-TL 概述
Step-Down Switching Regulator with Current-Mode Control 降压型开关稳压器具有电流模式控制 开关式稳压器或控制器
SI8005Q-TL 规格参数
| 生命周期： | Not Recommended | 零件包装代码： | SOIC |
| 包装说明： | HSOP, | 针数： | 8 |
| Reach Compliance Code： | unknown | ECCN代码： | EAR99 |
| HTS代码： | 8542.39.00.01 | 风险等级： | 5.66 |
| Is Samacsys： | N | 其他特性： | ALSO OPERATES IN ADJUSTABLE MODE FROM 0.5 TO 24 V |
| 模拟集成电路 - 其他类型： | SWITCHING REGULATOR | 控制模式： | CURRENT-MODE |
| 最大输入电压： | 28 V | 最小输入电压： | 4.75 V |
| 标称输入电压： | 12 V | JESD-30 代码： | R-PDSO-G8 |
| 长度： | 5.2 mm | 功能数量： | 1 |
| 端子数量： | 8 | 最高工作温度： | 85 °C |
| 最低工作温度： | -30 °C | 最大输出电流： | 3.5 A |
| 标称输出电压： | 5 V | 封装主体材料： | PLASTIC/EPOXY |
| 封装代码： | HSOP | 封装形状： | RECTANGULAR |
| 封装形式： | SMALL OUTLINE, HEAT SINK/SLUG | 认证状态： | Not Qualified |
| 表面贴装： | YES | 切换器配置： | BUCK |
| 最大切换频率： | 500 kHz | 技术： | BCDMOS |
| 温度等级： | OTHER | 端子形式： | GULL WING |
| 端子节距： | 1.27 mm | 端子位置： | DUAL |
| 宽度： | 4.4 mm | Base Number Matches： | 1 |
SI8005Q-TL 数据手册
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PDF下载SI-8005Q
Step-Down Switching Regulator with Current-Mode Control
Features and Benefits
Description
▪ Current-mode control system employed
▪ Excellent line regulation (60 mV maximum)
▪ 165 mꢀ maximum on-resistance of built-in MOSFET
▪ Output current 3.5 A
▪ Wide range of input voltages (4.75 to 28 V), supports 24
V direct drive
▪ Output voltage 0.5 to 24 V, compatible with various IC
power supply voltages, through low VREF of 0.5 V.
▪ High efficiency, 94% maximum at VIN = 8 V, VO = 5 V,
and IO = 0.5 A
▪ Operating frequency 500 kHz, supports downsizing of
smoothing choke coil
TheSI-8005Qisastep-downswitchingregulatorIC,designedas
anoutputvoltageregulatoratthesecondarystageofswitchmode
powersupplies.Thecurrent-modecontrolsystempermitssmall
ceramic capacitors to be used as output capacitors. Together
with the compact HSOP8 package, this allows reduction of
regulator circuitry area on the PCB by approximately 50% in
comparison with conventional topologies.
Designed to save power, losses in the SI-8005Q are reduced
by controlling the maximum on-resistance of a built-in output
MOSFETtoaslowas165mΩ.Furthermore,dieminiaturization
has been accomplished through a proprietary BCD process.
▪ Soft start and output on/off functions built-in
▪ Built-in protection:
TheSI-8005Qsuppliesanoutputcurrentof3.5 Aandanoutput
voltage that is variable from 0.5 to 24 V, which is easily set to
a voltage compatible with the diverse reduced power supply
voltages required by signal processing ICs. Accepting a wide
input voltage range, from 4.75 to 28 V, the SI-8005Q can be
driven directly by a 24 V power supply.
▫ Drooping overcurrent protection
▫ Overtemperature protection
▫ Undervoltage lockout (UVLO)
Package: HSOP8 surface mount with
exposed thermal pad
Applications include power supplies for signal processing ICs
formemoriesandmicrocomputersusedinplasmadisplaypanel
(PDP) TVs, liquid crystal display (LCD) TVs, computer hard
drives, and DVD recorders.
Not to scale
Functional Block Diagram
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Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
Selection Guide
Part Number
Packing
1000 pieces per reel
SI8005Q-TL
Absolute Maximum Ratings
Characteristic
Symbol
VIN
Remarks
Rating
Unit
V
DC Input Voltage
30
6
DC Input Voltage
VEN
V
Limited by internal thermal shutdown, mounted on a 30 mm × 30 mm
glass epoxy PCB with 25 mm × 25 mm exposed copper area,
TJ(max) = 125°C
Allowable Power Dissipation
PD
TJ
1.35
W
Junction Temperature
Storage Temperature
Internal thermal shutdown activates at approximately 140°C
–30 to 150
–40 to 150
°C
°C
T
stg
Mounted on a 30 mm × 30 mm glass epoxy PCB with 25 mm ×
25 mm exposed copper area
Thermal Resistance (Junction to Ambient)
Thermal Resistance (Junction to Case)
RθJA
RθJC
74
40
°C/W
°C/W
Recommended Operating Conditions*
Characteristic
Symbol
Remarks
Min.
Typ.
Max.
Units
VIN(min) is the greater of either 4.75 V or VO+1 V; except
if VO + 0.5 ≤ VIN ≤ VO +1 V, then VIN(min) is set such that
IO ≤ 2 A
See
remarks
DC Input Voltage Range
VIN
–
28
V
Using the circuit defined in the Typical Application
diagram and within PD limits
DC Output Current Range
IO
0
–
–
–
3.5
125
85
A
Operating Junction
Temperature Range
TJOP
TOP
–30
–30
°C
°C
Operating Temperature
Range
Operation within PD limits
*Recommended operating range indicates conditions which are required for maintaining normal circuit functions shown in the Electrical Characteristics
table.
Maximum Allowable Package Power Dissipation
Results calculated as:
1.6
⎛
⎞
⎛
VO
⎞
100
Hx
⎜
⎜
⎟
⎜
– VF × IO
1 –
⎟
⎟
PD V × I
– 1
=
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
O
O
⎟
⎜
V
IN
⎝
⎠
⎝
⎠
where:
VO is the output voltage,
VIN is the Input voltage (0.4 V for these results),
O is the Output current (0.3 A for these results),
I
ηx is the efficiency (%), which varies with VIN and IO (derived from the
Efficiency curves in the Characteristic Performance section), and
–25
0
25
50
75
100
125
VF is the diode forward voltage for D1, determination of the value for D1
should be made based on testing with the actual application (Sanken
diode SJPB-D4 was used for these results).
Ambient Temperature, TA (°C)
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and
an ambient temperature, TA, of 25°C, unless otherwise stated.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
2
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
ELECTRICAL CHARACTERISTICS1, valid at TA=25°C, unless otherwise noted
Characteristics
Reference Voltage
Symbol
Conditions
VIN = 12 V, IO = 1.0 A
Min
Typ
Max
Units
VREF
0.485
0.500
0.515
V
Output Voltage Temperature
Coefficient
∆VREF/∆T
VIN = 12 V, IO = 1.0 A, TA = –40°C to 85°C
–
±0.05
–
mV/°C
Efficiency2
η
fO
VIN = 12 V, VO = 5 V, IO = 1 A
VIN = 16 V, VO = 5 V, IO = 1 A
VIN = 8 to 28 V, VO = 5 V, IO = 1 A
VIN = 12 V, VO = 5 V, IO = 0.1 to 3.5 A
VIN = 12 V, VO = 5 V
–
450
–
90
500
10
10
–
–
550
60
60
6.0
–
%
kHz
mV
mV
A
Operating Frequency
Line Regulation
VLINE
VLOAD
IS
Load Regulation
–
Overcurrent Protection Threshold
Quiescent Current 1
3.6
–
IIN
VIN = 12 V, VO = 5 V, IO = 0 A, VEN = open
VIN = 12 V, VO = 5 V, IO = 0 A,VEN = 0 V
VSSL = 0 V, VIN = 16 V
18
–
mA
μA
ꢀA
V
Quiescent Current 2
IIN(off)
ISSL
VCEH
VCEL
ICEH
AEA
GEA
–
20
–
SS Terminal Leakage Current3
EN Terminal High Level Voltage
EN Terminal Low Level Voltage
EN Terminal Leakage Current
Error Amplifier Voltage Gain
Error Amplifier Transconductance
–
5
VIN = 12 V
2.8
–
–
–
VIN = 12 V
–
2.0
–
V
VEN = 0 V
–
1
ꢀA
V/V
μA/V
–
1000
800
–
–
–
Current Sense To COMP
Transimpedance
1/GCS
–
0.35
–
V/A
Maximum Duty Cycle (On)
Minimum On-Time
DCMAX
tMIN
–
–
92
–
–
%
100
ns
1Using circuit shown in Measurement Circuit diagram.
2Efficiency is calculated as: η(%) = ([VO × IO] × [VIN × IIN]) × 100.
3SS terminal enables soft start when a an external capacitor is connected to it. Because a pull-up resistor is provided inside the IC, no external voltage
can be applied to this terminal.
Measurement Circuit Diagram
1
C4
2
L1
Component
Rating
3
I N
7
8
BS
SI-8005Q
SW
FB
C1
C2
C3
C4
Di
L1
R1
R2
R3
22 ꢀF / 50 V
47 ꢀF / 25 V
220 pF / 10 V
10 nF / 25 V
SPB-G56S
10 ꢀH
46 kΩ
5.1 kΩ
62 kΩ
EN
SS
Di
R1
R2
IO
C1
C2
5
IIN
IEN
ISS
G ND
CO M P
VFB
VO
RL
4
6
VIN
VEN
VSS
C3
R3
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
Performance Characteristics
at TA = 25°C
100
90
80
70
60
50
40
100
8V
12 V
90
V
IN
4.75V
5 V
80
70
60
50
40
16 V
24V
Efficiency versus
Output Current
VO = 1.2 V
Efficiency versus
Output Current
VO = 3.3 V
28V
VIN
6V
8V
12V
0
1
2
3
4
5
0
1
2
3
4
5
IO (A)
IO (A)
100
90
80
70
60
50
40
100
90
80
70
60
50
40
8V
12 V
16 V
16 V
V
20V
28V
20V
28V
VIN
Efficiency versus
Output Current
VO = 5 V
Efficiency versus
Output Current
VO = 12 V
IN
0
1
2
3
4
5
0
1
2
3
4
5
IO (A)
IO (A)
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
4
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
Performance Characteristics
at TA = 25°C
6
5
4
3
2
1
0
6
0 A
5
1 A
8V
20V
2 A
12 V
4
3
2
1
0
24V
28V
3 A
15 V
Overcurrent
Protection
Load = CR
Overcurrent
Protection
IO
VIN
0
0
0
0
2
4
6
VIN (V)
8
10
0
1
2
3
4
5
6
IO (A)
5.05
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.96
4.95
25
V
20
15
10
5
IN
28V
20V
15 V
Load
Regulation
Quiescent
Current versus
Input Voltage
12 V
IO = 0 A
8V
0
1
2
3
4
5
0
10
20
30
40
IO (A)
VIN (V)
6
5
4
3
2
1
0
10
9
8
7
6
5
4
3
2
1
0
OTP On
Quiescent
Current versus
Input Voltage
Overvoltage
Protection
VIN = 12 V
V
EN = 0 V
IO = 0 A
OTP Off
130
120
140
J (°C)
150
160
10
20
30
40
T
VIN (V)
550
540
530
520
510
500
490
480
470
460
450
550
540
530
520
510
500
490
480
470
460
450
8V
12 V
V
IN
15 V
Operating
Frequency versus
Output Current
Operating
Frequency versus
Input Voltage
20V
24V
28V
1
2
3
4
5
0
10
20
VIN (V)
30
40
IO (A)
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
5
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
Component Selection
C5 is used to enable soft start. If the soft start function is not
used, leave the SS terminal open.
Diode Di A Schottky-barrier diode must be used for Di. If other
diode types, such as like fast recovery diodes, are used, the IC
may be destroyed because of reverse voltages applied by the
recovery voltage or turn-on voltage.
Resistors R1 and R2 R1 and R2 set the output voltage, VO.
Select the resistor values to set IADJ to 0.1 mA. R1 and R2 are
calculated by the following expression:
Choke Coil L1 If the winding resistance of the choke coil is too
high, IC efficiency may go down to the extent that the resistance
is beyond the rating. Because the overcurrent protection threshold
current is approximately 4 A, attention must be paid to the heat-
ing of the choke coil by magnetic saturation due to overload or
short-circulated load.
(
V
O
−VFB )= (VO − 0.5
)
V
FB
0.5
0.1×10−3
R1 =
(
Ω
)
，R2 =
=
≒5k
Ω
( )
0.1×10−3
IADJ
IADJ
For optimum performance, minimize the distance between com-
ponents.
Capacitors C1, C2, and C5 Because large ripple currents for
SMPS flow across C1 and C2, capacitors with high frequency
and low impedance must be used. Especially when the impedance
of C2 is high, the switching waveform may not be normal at low
temperatures.
Phase Compensation Components C3, C6, and R3 The
stability and response of the loop is controlled through the COMP
pin. The COMP pin is the output of the internal transconductance
Typical Application Diagram
VIN
Component
Rating
Manufacturer
VO
5 V
C4
2
1
BS
L1
C1 (2 ea)
C2 (2 ea)
C3
C4, C5
Di
10 ꢀF / 50 V
22 ꢀF / 16 V
220 pF
Murata, P/N GRM55DB31H106KA87
Murata, P/N GRM32ER71A226KE20
Murata, P/N GRM18 series
Murata, P/N GRM18 series
Sanken, P/N SPB-G56S or SJPB-L4
IN
SW
FB
7
8
3
5
EN
SI-8005Q
R1
C1
10 nF
VFB
SS
Di
C2
C O M P
G ND
4
R2
L1
R1
R2
R3
10 ꢀH
46 kΩ
5.1 kΩ
62 kΩ
6
C5
C3
IADJ
C6
O PEN
R3
G ND
G ND
Recommended PCB Layout
Recommended Solder Pad Layout
R3
FB
Unti: m m
4.30
1.35
C6
COMP
C3
R1
R2
EN
SS
C5
GND
C2
U1
C1
Vin
C4
Vout
D1
Vsw
L1
2.80
All external components should be mounted as closely as possible to the
SI-8005Q. The ground of all components should be connected at one point.
The exposed copper area on the PCB that is connected to the heat sink
on the reverse side of package is ground. Enlarging the PCB copper area
enhances thermal dissipation from the package.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
6
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
amplifier. The combination of a series-connected capacitor and
resistor sets the combination of a pole and zero frequency point
that decide the characteristics of the control system. The DC gain
of the voltage feedback loop is calculated by the following equa-
tion:
The goal of phase compensation design is to shape the con-
verter transfer function to get the required loop gain. The system
crossover frequency, where the feedback loop has unity gain, is
important. Lower crossover frequencies result in slower line and
load transient responses. On the other hand, higher crossover fre-
quencies cause system instability. A good standard is to adjust the
crossover frequency to approximately one-tenth of the switching
frequency.
V
FB
Adc = Rl ×Gcs×AEA
×
(1)
,
Vout
where
VFB is the feedback voltage (0.5 V),
AEA is the error amplifier voltage gain,
The optimal selection of phase compensation components can be
determined using the following procedure:
GCS is the current sense transconductance, and
Rl is the load resistor value.
1. Choose the phase compensation resistor (R3) to adjust the
required crossover frequency. R3 value is calculated by the fol-
lowing equation:
The system has two important poles. One is set by the phase
compensation capacitor (C3) and the output resistor of the error
amplifier. The other is set by the output capacitor and load resis-
tor. These poles are calculated by the following equations:
2π ×C2× fc Vout 2π ×C2×0.1× fs Vout
R3 =
×
<
×
(7)
,
GEA×GCS VFB
GEA×GCS
VFB
where fc is the required crossover frequency. This is usually
adjusted to less than one-tenth of the switching frequency.
G
EA
fp1 =
(2)
(3)
,
2π ×C3× AEA
2. Choose the phase compensation capacitor (C3) to get the
1
fp2 =
required phase margin. For applications that have typical inductor
values, adjusting the compensation zero point to less than one-
quarter of crossover frequency provides sufficient phase margin.
The value of C3 is calculated by the following equation:
,
2π ×C2× Rl
where GEA is the error amplifier transconductance.
The system has one important zero point. This is set by the phase
compensation capacitor (C3) and phase compensation resistor
(R3). The zero point is shown by the following equation:
4
C3 >
(8)
,
2π × R3× fc
1
fz1 =
(4)
.
where R3 is the phase compensation resistor.
2π ×C3× R3
3. It is necessary to determine whether a second compensation
capacitor (C6) is required. It is required if the ESR zero point of
the output capacitor is less than half of the switching frequency,
expressed as follows:
If the value of the output capacitor is the large or if it has a high
ESR, the system may have another important zero point. This
zero point would be set by the ESR and capacitance of the output
capacitor. The zero point is shown by the following equation:
1
fESR =
1
fs
(5)
.
<
2π ×C2× RESR
(9)
.
2π ×C2× RESR
2
In this case a third pole, which is set by the phase compensation
capacitor (C6) and phase compensation resistor (R3), is used to
compensate the effect of the ESR zero point on the loop gain.
The pole is shown by the following equation:
If this is the case, add the second compensation capacitor (C6)
and adjust ESR zero frequency (fp3). C6 value is calculated by
the following equation:
1
C2× RESR
fp3 =
C6 =
(6)
(10)
.
.
2π ×C6× R3
R3
Allegro MicroSystems, Inc.
7
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
Package Outline Drawing
5.20
8
0.15
Branding area
Tracking number
in dimple
0.40
1
2
1.50
0.08 ±0.08
0.695 TYP
0.05 ±0.05
0.40
1.27
2.90
Dimensions in millimeters
Branding codes (exact appearance at manufacturer discretion):
1st line, type: 8005Q
2nd line, lot:
SK YMDD
Where: Y is the last digit of the year of manufacture
M is the month (1 to 9, O, N, D)
DD is the date
3rd line, control : NNNN
Leadframe plating Pb-free. Device composition
complies with the RoHS directive.
Allegro MicroSystems, Inc.
8
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
Packing Specification
Empty tape
Trailer
IC occupied tape
Empty Tape
Leader
Cover Tape
Units mm
More than 160mm
More than 400mm
1,000pcs
160mm
(1,000 pockets)
Direction of reel
4
2
8
1.55
5.5
12
5.6
(4.75)
7
2
Void
60
Void
60
B
Void
Void
Void
Void
3
10
R22
13 0.3
15.4 0.1
Void
Void
Center extension
2
5
10.5
4
13
5
R22
10
30
3
60
60
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
9
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
Cautions
In general, the junction temperature level of surface mount pack-
age ICs is dependent upon the area and material of the PC board
and its copper area. Therefore, please design the PCB to allow
sufficient margin for heat dissipation.
Thermal Shutdown The SI-8000Q series has a thermal protec-
tion circuit. This circuit keeps the IC from the damage by over-
load. But this circuit cannot guarantee the long-term reliability
against the continuous overload conditions.
Parallel Operation Parallel operation of multiple products to
ESD Susceptibility Take precautions against damage by static
increase the current is not allowed.
electricity.
The products described herein are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc.
Sanken and Allegro reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit im-
provements in the performance, reliability, or manufacturability of its products. Therefore, the user is cautioned to verify that the information in this
publication is current before placing any order.
When using the products described herein, the applicability and suitability of such products for the intended purpose shall be reviewed at the users
responsibility.
Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and 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 society due to device failure or malfunction.
Sanken products listed in this publication are designed and intended for use as components in general-purpose electronic equipment or apparatus
(home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Their use in any application requiring radiation
hardness assurance (e.g., aerospace equipment) is not supported.
When considering the use of Sanken products in applications where higher reliability is required (transportation equipment and its control systems
or equipment, fire- or burglar-alarm systems, various safety devices, etc.), contact a company sales representative to discuss and obtain written
confirmation of your specifications.
The use of Sanken products without the written consent of Sanken in applications where extremely high reliability is required (aerospace equip-
ment, nuclear power-control stations, life-support systems, etc.) is strictly prohibited.
The information included herein is believed to be accurate and reliable. Application and operation examples described in this publication are
given for reference only and Sanken and Allegro assume no responsibility for any infringement of industrial property rights, intellectual property
rights, or any other rights of Sanken or Allegro or any third party that may result from its use.
Copyright © 2007 Allegro MicroSystems, Inc.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
10
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
January, 2008
<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
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
India
Saket Devices Pvt. Ltd.
Office No.13, First Floor, Bandal - Dhankude Plaza, Near PMT Depot, Paud Road, Kothrud, Pune - 411 038, India
Tel: 91-20-5621-2340
91-20-2528-5449
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
Sanken Electric Co., Ltd.
I02-010EA-080130
Step-Down Switching Regulator with Current-Mode Control
SI-8005Q
January, 2008
Europe
United Kingdom
Sanken Power Systems (UK) Limited
Pencoed Technology Park Pencoed, Bridgend CF35 5HY. UK
Tel: 44-1656-869-100
Fax: 44-1656-869-162
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
Sanken Electric Co., Ltd.
I02-010EA-080130
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