8172_nc0804ae

SM8172A
2-output Power Supply IC
1. OVERVIEW
The SM8172A is a 2-output power supply IC that incorporates a step-down DC/DC converter and series regulator with built-in reset circuit. The DC/DC converter is a PWM-type synchronous rectifier. The SM8172A has
soft start, overcurrent detection, supply undervoltage lockout, and thermal shutdown circuits built-in, making it
ideal as a supply voltage source IC for large-scale LSIs that operate from a 5V supply.
2. FEATURES
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Input voltage range: 4.5 to 5.5V
Standby current: 0.01µA (typ)
Series regulator
• Feedback-type current limiter to reduce output
current when outputs are short-circuit
• Output voltage: 3.3V
(available for optional setting from 2.1 to 3.6V
by 0.1V-step)
• Maximum output current: 450mA
• Voltage accuracy: ± 2% (VIN = 5.0V, Ta = 25°C)
DC/DC converter
• Current-mode operation for excellent transient
response
• Output voltage: 0.8 to 1.8V
(typ, selectable by external resistor)
• Maximum output current: 900mA
• Operating frequency: 2MHz (typ)
• Voltage accuracy: ± 2%
(FB pin, VIN = 5.0V, Ta = 25°C, DCOUT = 1.0V)
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Reset circuit built-in
• Reset detection voltage: 3.7V (typ)
(available for optional setting from 3.2 to 4.2V
by 0.1V-step)
• Reset return delay time: 65ms (typ)
(50ms, 32ms, 16ms, and 8ms selectable with
option)
Various protection circuit built-in
• Startup soft start circuit built-in
• Overtemperature thermal shutdown (TSD) circuit
built-in
• Supply undervoltage lockout (UVLO) circuit
built-in
Package: 10-pin SON
3. APPLICATIONS
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ODD
DVD player/recorder
Next-generation DVD player/recorder
Electronic equipment
4. TYPICAL APPLICATION CIRCUIT
5.0V
R3
10kΩ
VIN1
RESETN output
RESETN
C1
10µF
PGND
VIN2
C2
10µF
LDOUT
Regulator output
C5
3.3µF
GND
R2
330kΩ
DC/DC control
ENDCO
FB
C3
8pF
Regulator control
ENLDO
LX
L
2.2µH
R1
220kΩ
C4
4.7µF
DCOUT
(1.0V)
Note. RESETN is open-drain, therefore, please take care so that the High level signal does not exceed the absolute maximum rating of IC which receives
the reset signal. Besides, if the rest signal is not used, RESETN should be connected to GND.
5. ORDERING INFORMATION
Device
Package
SM8172AD
10-pin SON
SEIKO NPC CORPORATION —1
SM8172A
6. PINOUT
(Top view)
10 RESETN
VIN2 1
LDOUT 2
9
FB
GND 3
8
VIN1
ENDCO 4
7
LX
ENLDO 5
6
PGND
7. PIN DESCRIPTION
Number
Name
I/O
1
VIN2
–
Supply voltage (series regulator, internal circuits)*1
Function
2
LDOUT
O
Series regulator output*2
3
GND
–
Ground (internal circuits)
4
ENDCO
Ip*3
Output enable (DC/DC converter)
5
ENLDO
Ip*3
Output enable (series regulator)
6
PGND
–
Ground (DC/DC converter output circuit)
7
LX
O
DC/DC converter coil drive*4
8
VIN1
–
Supply voltage (DC/DC converter output circuit)*1
9
FB
I
DC/DC converter feedback connection*5
10
RESETN
O
Reset signal output (active-LOW, open-drain output)*6
*1. VIN1 and VIN2 should have the same voltage potential.
*2. When the series regulator is not used, LDOUT pin should be open and not be connected to GND.
*3. Ip = Input with pull-down resistor built-in
*4. When the DC/DC converter is not used, LX pin should be open and not be connected to GND or the supply.
*5. When the DC/DC converter is not used, FB pin should be connected to GND.
*6. When the reset signal is not used, RESETN pin should be connected to GND.
8. BLOCK DIAGRAM
10kΩ
Delay
circuits
VIN2
detector
5.0V
VIN2
10µF
GND
Current
protection
RESETN output
RESETN
−
ERR
+
LDOUT
Soft
start
LDOUT output
(3.3V)
3.3µF
Vref
ENDCO
+
Thermal
protection
ERR
330kΩ
FB
−
ENLDO
OSC
Soft
start
Current
protection
Current mode
PWM control
Output
control
VIN1
5.0V
8pF
LX
220kΩ
10µF
2.2µH
4.7µF
DCOUT
(1.0V)
PGND
SEIKO NPC CORPORATION —2
SM8172A
9. ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Rating
Unit
VIN
−0.3 to 6.0
V
VENDCO, VENLDO, VFB
−0.3 to VIN + 0.3
V
Output pin voltage range 1
VLX, VLDOUT
−0.3 to VIN + 0.3
V
Output pin voltage range 2
VRESETN
−0.3 to 6.0
V
ILX
1.5
A
ILDOUT
700
mA
PD
2000 (Ta = 25°C)*1
mW
TJMAX
+125
°C
Tstg
−55 to +125
°C
Supply voltage range
Input pin voltage range
LX output current
LDOUT output current
Power dissipation
Junction temperature
Storage temperature range
*1. 101.5 × 105.0 × 1.6mm, wiring ratio 250%, FR-4, 4-layer board (thermal vias, die pad connections)
Note that the ratings will vary depending on the board specifications, footprint pattern, and other factors.
Note. The device may be damaged or deteriorated if any of the above parameter ratings is exceeded.
Power dissipation PD [mW]
2500
2000
1500
1000
500
0
0
50
25
75
Ambient temperature Ta [°C]
10. RECOMMENDED OPERATING CONDITIONS
Rating
Parameter
Supply voltage
Operating ambient temperature
Pin
Symbol
VIN1, 2
VIN
−
Ta
Conditions
VIN1 = VIN2
Unit
min
typ
max
4.5
5.0
5.5
V
−20
+25
+85
°C
SEIKO NPC CORPORATION —3
SM8172A
11. ELECTRICAL CHARACTERISTICS
Note. The specifications of “ELECTRICAL CHARACTERISTICS” are shown by using “TYPICAL APPLICATION CIRCUIT” on page 13.
11-1. Common Blocks
VIN1 = VIN2 = 5.0V, GND = PGND = 0V, Ta = 25°C unless otherwise noted.
Rating
Parameter
Standby current
Pin
VIN1, 2
HIGH-level input voltage
LOW-level input voltage
ENDCO,
ENLDO
HIGH-level input current
RESETN output current
RESETN
Reset circuit operating
voltage
VIN2
Reset circuit return delay
time
Under voltage lockout
RESETN
VIN2
Symbol
Condition
Unit
min
typ
max
–
0.01
1
µA
VIH
1.8
–
–
V
VIL
–
–
0.6
V
IIH
–
5.0
10
µA
20
–
–
mA
ISTB
Standby mode (ENDCO = ENLDO = L),
No load on inputs/outputs
IRESETN
VRESETN = 1.0V
VRESETNL
When VIN falls
3.5
3.7
3.9
V
VRESETNH
When VIN rises
3.7
3.9
4.1
V
tRESETN
When VIN rises
–
65
–
ms
VUVLOL
When VIN falls
2.7
3.0
3.3
V
VUVLOH
When VIN rises
2.9
3.2
3.5
V
TSD operating temperature
–
TSD
–
170
–
°C
TSD hysteresis
–
TSDHYS
–
20
–
°C
11-2. Series Regulator
VIN1 = VIN2 = 5.0V, GND = PGND = 0V, Ta = 25°C unless otherwise noted.
Rating
Parameter
Pin
Symbol
Condition
No load
Unit
min
typ
max
–
0.1
0.25
mA
0.5
1
2
ms
Current consumption
VIN1, 2
IDD_LDO
Soft start time
LDOUT
tSS_LDO
Output voltage
LDOUT
VLDO
ILDO = 10mA
3.23
3.3
3.37
V
Maximum output current*1
LDOUT
ILDO
VIN2 = 4.5V, LDOUT = 3.3V
450
–
–
mA
Input stability
LDOUT
∆VOUT1
4.5V ≤ VIN2 ≤ 5.5V, ILDO = 30mA
–
0.1
0.35
%/V
Load stability
LDOUT
∆VOUT2
VIN2 = 5.0V, 1mA ≤ ILDO ≤ 300mA
–
40
–
mV
Overcurrent protection
circuit operating current
LDOUT
IOS
–
700
–
mA
*1. The output voltage difference at ILDO = 1mA and ILDO = 450mA is within ± 3%.
SEIKO NPC CORPORATION —4
SM8172A
11-3. DC/DC Converter
VIN1 = VIN2 = 5.0V, GND = PGND = 0V, Ta = 25°C unless otherwise noted.
Rating
Parameter
Pin
Symbol
Condition
Unit
min
typ
max
Current consumption 1
VIN1, 2
IDD1
No load, switching stopped
–
0.35
0.75
mA
Current consumption 2
FB = VIN1, LX = Open
–
2.5
5.5
mA
VIN1, 2
IDD2
Soft start time*1*2
–
tSS
0.2
0.6
1.0
ms
Output voltage range*2
–
VDCO
0.8
–
1.8
V
FB voltage
FB
VFB
0.588
0.6
0.612
V
Maximum output current*2*3
–
IDCO
900
–
–
mA
Switching frequency
LX
fOSC
1.7
2.0
2.3
MHz
Supply-side switch ON resistance
LX
RONP
IDCO = 50mA
–
0.3
–
Ω
GND-side switch ON resistance
LX
RONN
IDCO = –50mA
–
0.3
–
Ω
LX leakage current
LX
ILEAKLX
Standby mode, LX = 1/2VIN
–1.0
–
1.0
µA
Overcurrent protection circuit
operating current
LX
ILIMITLX
Supply-side switch
–
1.5
–
A
*1. The soft start time is the interval during which the output current is limited internally in the IC, and is different from the DC/DC converter output raise
time. If the maximum load current is output after soft start time startup, the output voltage does not fall. But, if the maximum load current is output
before soft start time startup, it should be careful that the output voltage may fall.
LX switching start
High
ENDCO
Low
1.5A (typ)
Current limit
Soft start time
1.8V
1.0V
DCOUT
42µsec (typ)
28µsec (typ)
The LX starts the switching operation after 42µs from ENDCO rising. After switching operation startup, the output current limit operates like linear
increase (load current = 0A). The DC/DC converter output voltage rise time varies with the load current, output capacitance, and other conditions.
SEIKO NPC CORPORATION —5
SM8172A
*2. The DC/DC converter output voltage (DCOUT) is determined by the external resistors as given by the following equation. The SM8172A DC/DC converter controls the output to maintain the FB pin voltage of 0.6V.
Example settings
DCOUT =
0.6 × (R1 + R2)
R2
DCOUT [V]
DCOUT
R1 [kΩ]
R2 [kΩ]
C3 [pF]
0.8
200
600
8
1.000
200
300
8
1.200
200
200
8
1.502
200
133
8
1.800
200
100
8
LX
SM8172
C3
R1
The E-12 series usage example
FB
R2
DCOUT [V]
R1 [kΩ]
R2 [kΩ]
C3 [pF]
1.0
220
330
8
1.2
220
220
8
1.5
150
100
10
*3. The output voltage difference at IDCO = 100mA and IDCO = 900mA is within ± 3%.
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Accuracy of output voltage
The accuracy of DCOUT output voltage is affected by the FB pin voltage accuracy (0.6V ± 2%) and the external resistor accuracy (R1, R2). If the external resistor of ± 1% accuracy is used, the accuracy of DCOUT output
voltage shows ± 3% accuracy including the FB pin voltage accuracy ± 2%.
SEIKO NPC CORPORATION —6
SM8172A
12. FUNCTIONAL DESCRIPTION
12-1. Series Regulator
12-1-1. Basic Operation
The SM8172A is equipped with a series regulator that drives a maximum 450mA load current at a fixed 3.3V
output voltage.
12-1-2. Soft Start Function
A soft start circuit is built-in to prevent output voltage overshoot and inrush current at startup. The soft start
time is the interval during which the output current is limited internally in the IC, and is different from the
series regulator output voltage rise time. The time varies with the load current, output capacitance, and other
conditions.
12-1-3. Overcurrent Protection Function
The series regulator overcurrent protection function uses a foldback method. When the output current exceeds
the overcurrent protection circuit operating current limit value of 700mA (typ), the output current and output
voltage are dropped, and the output short-circuit current is 80mA (typ). Normal operation is restored when the
overcurrent condition is resolved.
3.3V (typ)
LDOUT
(regulator output)
Output short-circuit
current
80mA (typ)
Overcurrent protection
current
700mA (typ)
ILDOUT
(regulator output current)
SEIKO NPC CORPORATION —7
SM8172A
12-2. DC/DC Converter
12-2-1. Basic Operation
The SM8172A DC/DC converter is a step-down converter that is controlled using a 2MHz switching frequency
current-mode PWM waveform, and which incorporates a MOSFET synchronous rectifier.
12-2-2. Soft Start Function
A soft start circuit is built-in to prevent output voltage overshoot and inrush current at startup. The soft start
time is the interval during which the output current is limited internally in the IC, and is different from the
DC/DC converter output voltage rise time. The time varies with the load current, output capacitance, and other
conditions.
12-2-3. Overcurrent Protection Function
The P-channel MOSFET is turned OFF when the inductor current exceeds the current limit (1.5A). Normal
operation is restored when the overcurrent condition is resolved.
Overcurrent detector
Pch MOS OFF
1.5A
LX
VIN1
Overloaded status
Inductor
current
Output
control
Normal operation
when resolving overload
12-3. Reset Function
When the supply voltage is within the rated range, the RESETN output is high-impedance (Hi-Z). When the
supply voltage falls below 3.7V (typ), the undervoltage detector circuit operates, setting the RESETN output
LOW. When the supply voltage subsequently rises above 3.9V (typ), the RESETN output goes high-impedance
again. However, when the supply voltage rises above 3.9V (typ), a built-in delay circuit sets the RESETN output to high-impedance after a delay of 65ms (typ). When at standby status, the RESETN output is LOW. When
standby status is released, the RESETN output goes high-impedance after delay time if the supply voltage is
more than 3.9V (typ).
SEIKO NPC CORPORATION —8
SM8172A
12-4. Supply Undervoltage Lockout Function
In addition to the reset function, when the VIN2 supply falls below 3.0V (typ), the undervoltage lockout function operates, stopping the DC/DC converter and series regulator outputs. When the VIN2 supply subsequently
rises above 3.2V (typ), the outputs start again.
VRESETNH
VRESETNL
VUVLOH
VUVLOL
VIN2
Reset return delay time
65msec (typ)
VRESETN
(Pull-up)
800µsec (typ)*1
LDOUT (regulator output)
VDCOUT
VLDOUT
LDOUT (regulator output)
*1
70µsec (typ)
DCOUT (DC/DC output)
DCOUT (DC/DC output)
DC/DC soft start time*2
0.6msec (typ)
LDO soft start time*2
1msec (typ)
DC/DC, regulator output stop
by UVLO lockout
*1. A time interval example for a typical application circuit with no load. The series regulator and DC/DC converter output voltage rise times may vary with
the load current, output capacitance, and other conditions.
*2. The soft start time is the interval during which the output current is limited internally in the IC, and is different from the series regulator and DC/DC converter output raise time.
SEIKO NPC CORPORATION —9
SM8172A
12-5. Thermal Shutdown (TSD) Protection Circuit
When the chip temperature rises above approximately 170°C (typ) for any reason whatsoever, the thermal shutdown circuit operates, stopping all outputs. When the chip temperature falls below 150°C (typ), the outputs
start again.
TSD
170 C (typ)
TSD-TSDHYS
150 C (typ)
Chip temperature
[ C]
800µsec (typ)*1
LDOUT (regulator output)
LDOUT (regulator output)
VDCOUT
VLDOUT
*1
70µsec (typ)
DCOUT (DC/DC output)
DCOUT (DC/DC output)
DC/DC, regulator output stop
by thermal shutdown
DC/DC soft start time*2
0.6msec (typ)
VRESETN
(Pull-up)
LDO soft start time*2
1msec (typ)
Reset return delay time
65msec (typ)
*1. A time interval example for a typical application circuit with no load. The series regulator and DC/DC converter output voltage rise times may vary with
the load current, output capacitance, and other conditions.
*2. The soft start time is the interval during which the output current is limited internally in the IC, and is different from the series regulator and DC/DC converter output raise time.
12-6. State of Each Output when Protection Function Operates
The output states of RESETN, DCOUT, and LDOUT when various circuit protection functions operate are
shown in the following table.
When various protection functions operate
Pins
Normal
operation
RESETN
DCOUT*1
LDOUT
Series regulator
DC/DC converter
overcurrent protection overcurrent protection
IOS = 700mA (typ)
ILIMITLX = 1.5A (typ)
RESET voltage
VIN2 ≤ 3.9V (typ)
Under voltage
lockout
VIN2 ≤ 3.2V (typ)
TSD
TSD = 170°C (typ)
Hi-Z
L
L
L
Hi-Z
Hi-Z
1.0V
1.0V
0V (Disable)
0V (Disable)
1.0V
< 1.0V
3.3V
3.3V
0V (Disable)
0V (Disable)
< 3.3V
3.3V
*1. When the DC/DC converter output voltage is set to 1.0V.
Note. The RESETN output is unaffected by the overcurrent protection function.
The DCOUT and LDOUT outputs are unaffected by the reset voltage.
SEIKO NPC CORPORATION —10
SM8172A
12-7. Standby Mode
When both ENDCO and ENLDO are LOW, the device switches to standby mode, and all the RESETN, converter, and regulator outputs stop.
12-8. Timing Diagrams
12-8-1. Supply Voltage (VIN1 = VIN2 = ENDCO = ENLDO)
VRESETNH
VRESETNL
VUVLOH
VUVLOL
VIN1
VIN2
ENABLE
VRESETN
(Pull-up)
Reset return delay time
65msec (typ)
800µsec (typ)*1
LDOUT (regulator output)
VDCOUT
VLDOUT
*1
70µsec (typ)
DCOUT (DC/DC output)
DC/DC, regulator output stop
by UVLO lockout
DC/DC soft start time*2
0.6msec (typ)
DC/DC, regulator output permission
LDO soft start time*2
1msec (typ)
*1. A time interval example for a typical application circuit with no load. The series regulator and DC/DC converter output voltage rise times may vary with
the load current, output capacitance, and other conditions.
*2. The soft start time is the interval during which the output current is limited internally in the IC, and is different from the series regulator and DC/DC converter output raise time.
Note. When the supply voltage is below approximately 0.8V, there is insufficient drive for the IC to operate normally and the RESETN output level is undefined. Normally, a pull-up resistor is connected to RESETN, which sets the RESETN output level to pull-up voltage.
SEIKO NPC CORPORATION —11
SM8172A
12-8-2. Enable Control
ENDCO
ENLDO
*1
VDCOUT
70µsec (typ)
DC/DC soft start time*2
0.6msec (typ)
800µsec (typ)*1
VLDOUT
LDO soft start time*2
1msec (typ)
Reset return delay time
65ms (typ)
VRESTEN
(pull-up)
Standby mode
when both ENDCO
and ENLDO are
LOW level
*1. A time interval example for a typical application circuit with no load. The series regulator and DC/DC converter output voltage rise times may vary with
the load current, output capacitance, and other conditions.
*2. The soft start time is the interval during which the output current is limited internally in the IC, and is different from the series regulator and DC/DC converter output raise time.
SEIKO NPC CORPORATION —12
SM8172A
13. TYPICAL APPLICATION CIRCUIT
5.0V
R3
10kΩ
VIN1
RESETN output
RESETN
C1
10µF
PGND
VIN2
C2
10µF
LDOUT
Regulator output
C5
3.3µF
GND
R2
330kΩ
DC/DC control
FB
ENDCO
C3
8pF
Regulator control
ENLDO
LX
L
2.2µH
R1
220kΩ
C4
4.7µF
DCOUT
(1.0V)
Recommended parts list
L
: 2.2µH
1002AS-2R2M (TOKO)
NR4018T2R2M (TAIYO YUDEN)
VLF4014ST2R2M1R9 (TDK)
R1, R2
: 220kΩ, 330kΩ
–
R3
: 10kΩ
–
C1, C2
: 10µF
Ceramic Capacitor C2012X5R1A106K (TDK)
Ceramic Capacitor GRM219B31A106K (Murata)
C3
: 8pF
Ceramic Capacitor
C4
4.7µF
Ceramic Capacitor GRM219B31A475K (Murata)
C5
: 3.3µF
Ceramic Capacitor GRM219B31A335K (Murata)
Note. RESETN is open-drain, therefore, please take care so that the High level signal does not exceed the absolute maximum rating of IC which receives
the reset signal. Besides, if the rest signal is not used, RESETN should be connected to GND.
SEIKO NPC CORPORATION —13
SM8172A
14. USAGE NOTES
14-1. Select of Inductance (L)
It recommends 2.2µH of Inductance (L) for SM8172A. Since the DC resistance of inductance affects the
power efficiency, we recommend the inductance of low DC resistance. Besides, please take care so that the
inductance peak current (Ipeak) does not exceed the maximum allowable current of inductor.
14-2. External Capacitor Type
The external capacitors connected to the SM8172A should be multi-layer ceramic capacitors, with low temperature coefficient X5R or X7R class (EIA standard) multi-layer ceramic capacitors recommended. Use of high
temperature coefficient Z5U or Y5V class multi-layer ceramic capacitors may cause an unstable output voltage
condition and should be avoided.
Capacitor temperature coefficient 3-letter codes (EIA standard)
Lower category
temperature
Upper category
temperature
Maximum deviation in capacitance
from +25°C (0V DC) value
X = −55°C
5 = +85°C
F = ± 7.5%
Y = −30°C
6 = +105°C
P = ± 10%
Z = +10°C
7 = +125°C
R = ± 15%
8 = +150°C
S = ± 22%
T = +22%/−33%
U = +22%/−56%
V = +22%/−82%
Selection
: X5R characteristics
14-3. VIN Supply Input Capacitor
In some cases, the printed board component layout may affect the stability of the output voltages. In such
cases, the VIN power supply capacitor should be increased or an additional capacitor connected.
SEIKO NPC CORPORATION —14
SM8172A
14-4. Mounting
The package rear surface is metallic, and can be connected to the printed circuit board pattern as a heatsink.
The connected pattern should be tied to GND level. Furthermore, use of a thermal via structure on the PCB or
other technology should be used to provide sufficient heat dissipation. Use a printed circuit board with 4 or
more layers. The PCB wiring ratio*1 should exceed 200%, where the wiring ratio is the sum total of printed
wiring pattern surface area relative to the circuit board surface area.
*1: Determining the wiring pattern ratio
Example: 4-layer board with the same wiring pattern on 4 layers (left), where the wiring pattern surface
area on each layer is represented by S1, and the non-wired surface area is represented by S2. The wiring
pattern is connected directly to the IC, and each layer’s wiring pattern is connected to the IC by through
holes. The circuit board surface area seen from above is S1 + S2. First, calculate the board surface area,
here represented by S1 + S2. Next, calculate the wiring pattern surface area on each layer connected to the
IC, represented here by S1. Calculate the total wiring pattern surface area for all 4 layers, in this example 4
× S1. Finally, calculate the wiring ratio percentage using the following equation: (Wiring ratio) = (Total
wiring pattern surface area connected to the IC) / (PCB surface area) × 100. In this example, 4 × S1/(S1 +
S2) × 100 [%], or a wiring ratio of 200% when S1 = S2.
S1
S2
SEIKO NPC CORPORATION —15
SM8172A
15. PACKAGE DIMENSION
(Unit: mm)
Top view
Bottom view
2.50 ± 0.07
0.50 4 = 2.00 ± 0.05
1.25
A
1.64
6
6
10
1.34
0.40 ± 0.07
B
1.50
C0.25
1 2
5
0.10 S A B
0.10 S
0.05max
0.70 ± 0.05
0.75max
3.00 ± 0.07
10
5
2
1
0.22 ± 0.05
0.14
φ 0.05
M
SAB
S
0.05 S
0.5
SEIKO NPC CORPORATION —16
SM8172A
Please pay your attention to the following points at time of using the products shown in this document.
1. The products shown in this document (hereinafter ”Products”) are designed and manufactured to the generally
accepted standards of reliability as expected for use in general electronic and electrical equipment, such as
personal equipment, machine tools and measurement equipment. The Products are not designed and
manufactured to be used in any other special equipment requiring extremely high level of reliability and safety,
such as aerospace equipment, nuclear power control equipment, medical equipment, transportation equipment,
disaster prevention equipment, security equipment. The Products are not designed and manufactured to be used
for the apparatus that exerts harmful influence on the human lives due to the defects, failure or malfunction of the
Products.
If you wish to use the Products in that apparatus, please contact our sales section in advance.
In the event that the Products are used in such apparatus without our prior approval, we assume no responsibility
whatsoever for any damages resulting from the use of that apparatus.
2. NPC reserves the right to change the specifications of the Products in order to improve the characteristics or
reliability thereof.
3. The information described in this document is presented only as a guide for using the Products. No responsibility
is assumed by us for any infringements of patents or other rights of the third parties which may result from its use.
No license is granted by implication or otherwise under any patents or other rights of the third parties. Then, we
assume no responsibility whatsoever for any damages resulting from that infringements.
4. The constant of each circuit shown in this document is described as an example, and it is not guaranteed about its
value of the mass production products.
5. In the case of that the Products in this document falls under the foreign exchange and foreign trade control law or
other applicable laws and regulations, approval of the export to be based on those laws and regulations are
necessary. Customers are requested appropriately take steps to obtain required permissions or approvals from
appropriate government agencies.
SEIKO NPC CORPORATION
1-9-9, Hatchobori, Chuo-ku,
Tokyo 104-0032, Japan
Telephone: +81-3-5541-6501
Facsimile: +81-3-5541-6510
http://www.npc.co.jp/
Email:[email protected]
NC0804AE 2009.09
SEIKO NPC CORPORATION —17