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Voltage Regulators
AN8015SH
Single-channel step-down, step-up, or inverting use DC-DC converter control IC
Unit: mm
Overview
The AN8015SH is a single-channel DC-DC converter control IC using the PWM method. This IC can provide any one output type from among step-down, step-up and inverting output. Its operating supply voltage range is wide and its consumption current is small. In addition, since it uses the 10-pin surface mounting type package with 0.5 mm pitch, it is suitable for highly efficient miniature potable power supply, especially for a negative output power supply.
3.00.30 1.50.2
4.30.30 6.30.30 1 10
0.5
5
6
0.10.1
0.50.2
Features
* Wide operating supply voltage range (3.6 V to 34 V) SSOP010-P-0225 * Small consumption current (1.8 mA typical) * Converter control in a wide output frequency range is Note) The package of this product will be changed possible (2 kHz to 500 kHz). to lead-free type (SSOP010-P-0225A). See the * Built-in timer latch short-circuit protection circuit new package dimensions section later of this (charge current 1.1 A typical) datasheet. * Incorporating the under-voltage lock-out (U.V.L.O.) circuit * Incorporating a high precision reference voltage circuit (2.46 V (allowance: 3%)) * Output block is open-collector (darlington) type. * High absolute maximum rating of output current (100 mA) * Maximum duty ratio is fixed and has small sample-to-sample variations (90% 5%).
Applications
* LCD displays, digital still cameras, and PDAs
VREF VCC
Block Diagram
CT
6
7
1
Reference supply 2.46 V (allowance : 3%)
0.5 V Triangular wave OSC 1.2 V PWM comparator 0.37 V 1.11 V VREF SR Latch R O U.V.L.O.
2
RT
5
Out
IN+ IN- FB
8 9 10
Error amp.
I S.C.P. comp.
1.83 V Clamp S.C.P. 3
4
GND
0.6250.10
0.15-0.05
+0.1
0.6250.10
0.20.1
Publication date: April 2003
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AN8015SH
Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 Symbol CT RT S.C.P. GND Out VCC VREF IN+ IN- FB Description Pin for connecting oscillator timing capacitor Pin for connecting oscillator timing resistor Pin for connecting the time constant setting capacitor for short-circuit protection Grounding pin Open collector type output pin Power supply voltage application pin Reference voltage output pin Error amplifier noninverted input pin Error amplifier inverted input pin Output pin of error amplifier
Absolute Maximum Ratings
Parameter Supply voltage IN- terminal allowable application voltage IN+ terminal allowable application voltage Output terminal allowable application voltage Collector output current Power dissipation
* *
Symbol VCC VIN- VIN+ VOUT IOUT PD Topr Tstg
Rating 35 - 0.3 to VREF - 0.3 to VREF 35 100 154 -30 to +85 -55 to +150
Unit V V V V mA mW C C
Operating ambient temperature Storage temperature
*
Note) *: Expect for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25C.
Recommended Operating Range
Parameter Error amplifier input voltage Collector output voltage Collector output current Timing capacitance Timing resistance Oscillation frequency Reference voltage output current Soft start short-circuit protection time constant setting capacitance Symbol VIN VOUT IOUT CT RT fOUT IRE CSCP Range - 0.1 to 0.8 34 (maximum) 50 (maximum) 100 to 27 000 5.6 to 15 2 to 500 -3 to 0 1 000 (minimum) Unit V V mA pF k kHz mA pF
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Electrical Characteristics at VCC = 12 V, RT = 15 , CT = 200 pF, Ta = 25C
Parameter Reference voltage block Reference voltage Input regulation with input fluctuation Input regulation with input fluctuation 2 Load regulation Output voltage temperature characteristics 1 Output voltage temperature characteristics 2 Reference short-circuit current U.V.L.O. block Circuit operation start voltage Hysteresis width Error amplifier block Input offset voltage Input bias current Common-mode input voltage range High-level output voltage Low-level output voltage Output sink current Output source current Open-loop gain Common-mode ripple rejection ratio Output block Oscillation frequency Maximum duty ratio Output saturation voltage Output leak current RT terminal voltage Maximum oscillation frequency Frequency supply voltage characteristics Frequency temperature characteristics 1 Frequency temperature characteristics 2 fOUT Dumax VOL ILEAK VRT fOUT(max) RT = 5.6 k, CT = 150 pF fdV fdT1 fdT2 fOUT = 200 kHz, VCC = 3.6 V to 34 V fOUT = 200 kHz, Ta = -30C to +25C fOUT = 200 kHz, Ta = 25C to 85C RT = 15 k, CT = 200 pF RT = 15 k, CT = 200 pF IO = 50 mA, RT = 15 k VCC = 34 V, when output transistor is off 175 85 195 90 0.9 0.5 500 2 3 3 215 95 1.2 10 kHz % V A V kHz % % % VIO IB VICR VEH VEL ISINK VFB = 0.8 V ISOURCE VFB = 0.8 V AV CMRR -6 -500 - 0.1 -25 6 0.8 0.3 mV nA V V V mA A dB dB VUON VHYS 2.8 100 3.1 200 3.4 300 V mV VREF Line Line2 Load VTC1 VTC2 IRS IREF = -1 mA VCC = 3.6 V to 34 V, IREF = -1 mA VCC = 3.6 V to 20 V IREF = - 0.1 mA to -1 mA Ta = -30C to +25C Ta = 25C to 85C 2.386 2.46 5 2 0.5 0.5 -20 2.534 20 10 10 V mV mV mV % % mA Symbol Conditions Min Typ Max Unit
VREF - 0.3 VREF - 0.1 0.1 8 -120 70 50
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Electrical Characteristics at VCC = 12 V, RT = 15 , CT = 200 pF, Ta = 25C (continued)
Parameter Short-circuit protection circuit block Input threshold voltage Input standby voltage Input latch voltage Charge current Comparator threshold voltage Whole device Total consumption current Total consumption current 2 ICC ICC2 RT = 15 k RT = 5.6 k, CT = 150 pF 1.8 2.5 2.8 mA mA VTHPC VSTBY VIN ICHG VTHL VSCP = 0 V 1.73 1.15 -1.32 1.83 1.25 30 1.93 1.35 120 V V mV A V Symbol Conditions Min Typ Max Unit
-1.1 - 0.88 1.83
Terminal Equivalent Circuits
Pin No. 1 Equivalent circuit Description CT: The terminal used for connecting a timing capacitor to set oscillation frequency. Use a capacitance value within the range of 100 pF to 27 000 pF. Use a oscillation frequency in the range of 2 kHz to 500 kHz. RT: The terminal used for connecting a timing resistor to set oscillation frequency. Use a resistance value within the range of 5.6 k to 15 k . The terminal voltage is 0.5 V typ. 100 OSC PWM S.C.P. I/O O
VREF To PWM input OSC comp. IO 1 210
2
VREF
I
2 RT (VRT 0.5 V) 3
VREF ICHG CT PWM Latch S Q R
S.C.P. 3
1.83 V
S.C.P.: The terminal used for connecting a capacitor to set the time constant of soft start and timer latch shortcircuit protection circuit. Use a capacitance value in the range of more than 1 000 pF. The charge current is about 1.1 mA at RT = 15 k VRT 1 ICHG = x [A] RT 30 GND: Grounding terminal
O
4
4
4
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Terminal Equivalent Circuits (continued)
Pin No. 5 VREF 5 Equivalent circuit Description Out: Open-collector type (darlington) output terminal. The absolute maximum rating of output current is 100 mA Use with a steady-state output current under 50 mA. I/O O
6 6
VCC: The terminal for applying supply voltage. Use with a operating supply voltage within the range of 3.6 V to 34 V.
7
VCC
VREF: The output terminal for the reference voltage (2.46 VREF overcurrent detection V) Use with a load current -3 mA or under. This terminal is incorporating the short-circuit protection circuit, and the short-circuit current is Bias to other block about -20 mA. Use the VREF for the reference 7 input setting of the error amplifier. IN+: The noninverted input terminal of the error amplifier. For common-mode input, use in the range of - 0.1 V to +0.8 V. IN-: The inverted input terminal of the error amplifier. For common-mode input, use in the range of - 0.1 V to +0.8 V. FB: The output terminal of the error amplifier. The source current is about -120 A, and the sink current is about 8 mA. Correct the frequency characteristics of the gain and the phase by connecting a resistor and a capacitor between this terminal and IN- terminal.
O
8
I
VREF
9
I
9
8
10
VREF 120 A CT 8 mA 10 PWM
O
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Application Notes
[1] Main characteristics Reference voltage temperature characteristics
2.50 VCC = 12 V IREF = -1 mA
Maximum duty ratio temperature characteristics
91.0 VCC = 12 V CT = 200 pF RT = 15 k 90.5
Reference voltage VREF (V)
2.49
2.48
Maximum duty ratio Dumax (%)
90.0
2.47
89.5
2.46
2.45 -40
-20
0
20
40
60
80
100
89.0 -40
-20
0
20
40
60
80
100
Ambient temperature Ta (C)
Ambient temperature Ta (C)
Oscillation frequency temperature characteristics
200 VCC = 12 V CT = 200 pF RT = 15 k 195
Timing capacitance Oscillation frequency
1M RT = 5.6 k VCC = 12 V Ta = 25C
Oscillation frequency fOUT (kHz)
Oscillation frequency fOUT (Hz)
100k RT = 10 k
190
RT = 15 k 10k
185
180 -40
-20
0
20
40
60
80
100
1k 100
1 000
10 000
100 000
Ambient temperature Ta (C)
Timing capacitance CT (pF)
Maximum duty ratio Oscillation frequency
100 VCC = 12 V Ta = 25C RT = 5.6 k 90
Oscillation frequency Triangular wave maximum amplitude voltage
Triangular wave maximum amplitude voltage (V)
1.4 1.2 1.0 0.8 0.6 0.4 0.2
Maximum duty ratio Dumax (%)
RT = 15 k 80
VCC = 12 V RT = 15 k Ta = 25C
70 10k
100k
1M
0 10k
100k
1M
Oscillation frequency fOUT (Hz)
Oscillation frequency fOUT (Hz)
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Application Notes (continued)
[1] Main characteristics (continued) Supply voltage Reference voltage
3.0 Ta = 25C IREF = -1 mA 2.5
Supply voltage Total consumption current
3.0 Ta = 25C
Total consumption current ICC (mA)
2.5 RT = 5.6 k 2.0 RT = 15 k 1.5
Reference voltage VREF (V)
2.0
1.5
1.0
1.0
0.5
0.5
0 0 1 2 3 4 5
0 0 1 2 3 4 5
Supply voltage VCC (V)
Supply voltage VCC (V)
Reference voltage line regulation
2.52 Ta = 25C IREF = -1 mA
Total consumption current line regulation
3.0 Ta = 25C
Reference voltage VREF (V)
2.50
Total consumption current ICC (mA)
2.5 RT = 5.6 k
2.48
2.46
2.0 RT = 15 k
2.44
2.42 0 5 10 15 20 25 30 35
1.5 0 5 10 15 20 25 30 35
Supply voltage VCC (V)
Supply voltage VCC (V)
Timing resistance Total consumption current
2.5 VCC = 12 V Ta = 25C
Timing resistance Output saturation voltage
0.85 VCC = 12 V Ta = 25C IO = 50 mA
Total consumption current ICC (mA)
Output saturation voltage VOL (V)
0.84
2.0
0.83
0.82
1.5
0.81
1.0 4 8 12 16 20
0.80 4 8 12 16 20
Timing resistance RT (k)
Timing resistance RT (k)
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Application Notes (continued)
[2] Timing chart
3.1 V typ. Lock-out release Supply voltage (VCC) VREF rise time tr (VREF) 10 [s] 3.6 V Reference voltage (VREF) 2.46 V Error amplifier output (FB) Power supply on Triangular wave (CT) Dead-time voltage (VDT) 1.83 V 1.20 V 1.11 V 0.37 V
High S.C.P. terminal voltage Output transistor collector waveform (Out) Soft start operation Maximum duty 90% Low
Figure 1. PWM comparator operation waveform
Reference voltage (VREF) Short-circuit protection input threshold level Comparator threshold level S.C.P. terminal voltage Dead-time voltage (VDT) Error amplifier output (FB) Triangular wave (CT) Output transistor collector waveform (Out)
2.46 V 1.83 V 1.20 V 1.11 V 0.37 V 0.03 V High Low
Short-circuit protection comparator output
tPE
High Low
Figure 2. Short-circuit protection operation waveform
8
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Application Notes (continued)
[3] Function descriptions 1. Reference voltage block This block is composed of the band gap circuit, and outputs the temperature compensated 2.46 V reference voltage to the VREF terminal (pin 7). The reference voltage is stabilized when the supply voltage is 3.6 V or higher, and used as the operating power supply for the IC inside. It is possible to take out a load current of up to -3 mA . Also, an overcurrent protection circuit is built in for the load, thereby protecting the IC from destruction when VREF terminal is short circuited. 2. Triangular wave oscillation block The triangular wave which swings from the highest wave of approximately 1.4 V to the lowest wave of approximately 0.37 V will be generated by connecting a timing capacitor and a resistor to the CT terminal (pin 1) and RT terminal (pin 2) respectively. The oscillation frequency can be freely decided by the value of CT and RT connected externally. The triangular wave is connected with the inverted input of PWM comparator of the IC inside. 3. Error amplifier block This block detects the output voltage of DC-DC converter by the pnp transistor input type error amplifier, and inputs the amplified signal to the PWM comparator. The common-mode input voltage range is - 0.1 V to 0.8 V, and is a voltage obtained by dividing the reference voltage with resistors. Also, it is possible to perform the gain setting and the phase compensation arbitrarily by inserting the feedback resistor and capacitor between the error amplifier output terminal (pin 10) and the inverted input terminal (pin 9). The output voltage VOUT, if positive, is obtained by connecting the resistor-divided reference voltage to the noninverted input terminal as shown in figure 3. 1), and the output voltage VOUT, if negative, is obtained by connecting to the inverted input terminal as shown in figure 3. 2). The output voltages in each of these cases are given in the following equations.
VOUT = VIN+ x VIN+ = VREF x VOUT R1 R3 R1 + R2 R2 R4 R3 + R4 PWM comparator Error amp. input R1 R2 VOUT = - (VREF - VIN-) x VIN- = VREF x R2 R1 + R2 R3 + R4 + VREF R3
VREF 7 IN+ 8 IN- 9 RNF CNF 1) If output is positive R3
VREF 7 IN+ 8 IN- 9 RNF CNF 2) If output is negative Figure 3. Connection method of error amplifier PWM comparator Error amp. input
FB 10
VOUT
4. Timer latch short-circuit protection circuit This circuit protects the external main switching devices, flywheel diodes, and choke coils, etc. from destruction or deterioration if overload or short-circuit of power supply output lasts for a certain time. The timer latch short-circuit protection circuit detects the output level of the error amplifier. When the output voltage of DC-DC converter drops and the output level of error amplifiers exceeds 1.85 V, the low-level output is given and the timer circuit is actuated to start the charge of the external protection enable capacitor. If the output of the error amplifier does not return to a normal voltage range by the time when the voltage of this capacitor reaches 1.83 V, it sets the latch circuit, cuts off the output drive transistor, and sets the dead-time at 100%.
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FB 10
R2
R4
R4
9
AN8015SH
Application Notes (continued)
[3] Function descriptions (continued) 5. Low input voltage malfunction prevention circuit (U.V.L.O.) This circuit protects the system from destruction or deterioration due to control malfunction when the supply voltage is low in the transient state of power on/off. The low input voltage malfunction prevention circuit detects the internal reference voltage which changes according to the supply voltage level. Until the supply voltage reaches 3.1 V during its rise time, it cuts off the output drive transistor, sets the dead-time at 100% and holds the S.C.P. terminal (pin 3) to low level. During the fall time of the power supply voltage, it has hysteresis width of 200 mV and operates 2.9 V or less. 6. PWM comparator block The PWM comparator controls the on-period of the output pulse according to the input voltage. It turns on the output transistor during the period when the triangular wave of CT terminal (pin 1) of noninverted input is lower than any one of the following voltages : the voltage of the error amplifier output (pin 10) of the inverted input, S.C.P. terminal (pin 3), and the voltage for dead-time which is fixed inside the IC. The S.C.P. terminal voltage is kept at 1.25 V in the state in which DC-DC converter output is stabilized. However, when the power supply is turned on, the soft start is activated, which gradually extends on-period according to the time constant determined by the capacitance of externally attached capacitor and the charge current. The maximum duty ratio is fixed at approximately 90% by the voltage for dead-time. 7. Output block The output drive transistor is of open-collector type output connected in darlington circuit of emitter common GND. The breakdown voltage of collector output terminal (pin 5) is 34 V and it is possible to obtain up to 100 mA output current. [4] Triangular wave oscillation circuit 1. Oscillation frequency setting method The waveform of triangular wave oscillation is obtained by charging and discharging of the constant current IO from the external timing capacitor CT which is connected to CT terminal (pin 1). The constant current is set by the externally attached timing resistor RT . The peak value of the wave VCTH and the trough VCTH = 1.4 V typ. value of the wave VCTL are fixed at approximately 1.4 V typical and 0.37 V typical respectively. The oscillation frequency fOSC is obtained by the following formula; VCTL = 0.37 V typ. 1 IO t1 t2 fOSC = = t1 + t 2 2 x CT x (VCTH - VCHL) Charging Discharging VRT 0.5 whereas IO = 2 x =2x RT RT T because VCTH - VCTL = 0.83 V Figure 4. Triangular wave oscillation waveform 1 fOSC = 1.66 x CT x RT The output frequency fOUT is equal to fOSC since it is PWM-controlled.
10
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Application Notes (continued)
[4] Triangular wave oscillation circuit (continued) 2. Usage notes This IC uses the constant current given by the timing resistor RT as the bias current of the triangular oscillation block and the PWM comparator for consumption current reduction. The total consumption current is approximately 1.8 mA (typical) when RT is 15 k, and it increases to approximately 2.5 mA (typical) when RT is 5.6 k. In order to obtain the steady-state output current of 100 mA at the open collector output, it is necessary to set RT value to 15 k or smaller. It is possible to use the circuit in the recom1M mended operating range of 2 kHz to 500 kHz of the oscillation frequency. However, the timing resistor 500 k RT versus the oscillation frequency should be set Recommended operating within the recommended range shown in figure 5. condition 100 k Also, refer to the "Applications Notes, [1] Main characteristics, Timing capacitance Oscillation frequency" for setting the timing capacitance. 10 k For a high frequency use, the overshoot and undershoot amounts increase due to operation delay of the triangular oscillation comparator, and the maximum duty ratio drops. This effect can be alle1k viated by speeding up through the reduction of the 10 k 5 k 5.6 k 15 k resistor RT and increase in the circuit current. Timing resistance RT () Note that this IC can not be used as an IC for Figure 5. Timing resistance recommended condition slave when the several ICs are operated in parallel synchronous mode. [5] Time constant setting method for short-circuit protection circuit with joint-use of soft start/timer latch type The constructional block diagram of protection latch circuit is shown in figure 6. The comparator for short-circuit protection compares the output of error amplifier VFB with the reference voltage of 1.85 V at all the time. When the load conditions of DC-DC converter output is stabilized, there is no fluctuation of error amplifier output and the short-circuit protection comparator also keeps the balance. At this moment, the output transistor Q1 is in the conductive state and the S.C.P. terminal is hold to approximately 1.25 V through the clamp circuit. When the load conditions suddenly change, and high-level signal (1.85 V or higher) is input from the error amplifier to the noninverted input of the short-circuit protection comparator, the short-circuit protection comparator outputs the low-level signal. Since this signal cuts off the output transistor Q1, the S.C.P. terminal voltage VPE is released, and the externally connected capacitor CS starts charging according to the following equation: tPE VPE = VSTBY + ICHG x [V] CS 1.83 V = 1.25 V + ICHG x CS = ICHG x tPE [F] 0.58 tPE CS
Oscillation frequency fOUT (Hz)
ICHG is the constant current determined by the oscillation timing resistor RT and its dispersion and fluctuation with temperature are small. ICHO is expressed in the following equation: ICHG = VRT 1 x [A] RT 30
VRT is approximately 0.5 V and ICHO becomes approximately 1.1 A when RT = 15 k.
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Application Notes (continued)
[5] Time constant setting method for short-circuit protection circuit with joint-use of soft start/timer latch type (continued) When the external capacitor CS has been charged up to approximately 1.83 V, it sets the latch circuit, cuts off the output drive transistor by enabling the low input voltage malfunction prevention circuit, and sets the dead-time at 100%. The low input voltage malfunction prevention circuit is once enabled, the S.C.P. terminal voltage is discharged to approximately 30 mV but the latch circuit is not reset unless the power is turned off. The S.C.P. terminal voltage is inputted to the PWM comparator, and the soft start is actuated when the power turns on. However, since at the beginning of power on, the error amplifier output is high level, and VPE of S.C.P. terminal voltage is released and charging begins; the external capacitor should be set so that the output voltage of DC-DC convertor starts to rise before the latching circuit is set. The charging equation is as same as the above. The soft start time tSS until the input standby voltage VSTBY becomes 1.25 V is given in the following equations: 1.25 V = 0.03 V + ICHG x tSS = 1.22 x CS ICHG [s]
1.25 V S.C.P. comp. Q1 1.83 V Q2
Clamp circuit
tSS CS
VREF ICHG PWM comparator input
IN+ IN- FB
8 9 10
Error amp.
SR Latch
R U.V.L.O.
Output cut-off
S.C.P.
3
CS Figure 6. Short-circuit protection circuit
12
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Application Circuit Examples
1. Chopper method step-down type VCC 120 k 0.1 F 1 000 pF 3.6 k 9 IN- 10 FB 8 IN+ 8.2 k 7 VREF 6 VCC SBD 4.5 k 25.5 k VO 5V
GND 4
S.C.P. 3
200 pF
15 k
0.1 F
2. Chopper method inverting type 130 k 120 k 3.6 k 1 000 pF
9 IN- 10 FB 8 IN+
VCC SBD VO -24 V
6 VCC Out 5
0.1 F 9.1 k 8.2 k
7 VREF
RT 2
S.C.P. 3
200 pF
15 k
0.1 F
GND 4
CT 1
Out 5
CT 1
RT 2
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Application Circuit Examples (continued)
3. On/off circuit example 1) Method to cut VCC line
VCC Q1 ICC
6 VCC
VO SBD C8 On/off
Standby current 0 A C7
7 VREF GND 4 IN- IN+ 8 FB 10
9
2) Method to cut S.C.P. line
S.C.P.
VCC C8 C7
7 VREF
Out 5
1
2
CT
RT
3
Consumption current when output off 1.8 mA
IN- IN+ FB
VO SBD
ICC
6 VCC
10
9
8
GND 4
S.C.P. 3
Q2 On/off
4. Using method Since the on/off circuit is not incorporated in this IC, it is required to add on/off circuit externally to provide a standby function. When the switch (Q1) is inserted between the VCC line and the Vcc pin of the IC (pin 6) as shown in 3. 1), the standby current is suppressed to 0. When the output is turned off by decreasing the S.C.P. terminal voltage below the lower limit of the triangular wave (0.37 V typical) as shown in 3. 2), the consumption current does not decrease because the IC is operating. 5. Usage notes The rise time of the VCC becomes sharp especially in the case of 3. 1). At that time, there is a case that the internal latch circuit of the IC is set so that the circuit fails to start. Adjust C7 or C8 so that the rise time for VREF pin (pin 7) becomes 10 ms or longer.
14
Out 5
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CT
RT
2
AN8015SH
New Package Dimensions (Unit: mm)
* SSOP010-P-0225A (Lead-free package) 3.000.20 10 6 (1.00) 4.300.20 6.300.30
0.15-0.05
+0.10
0 to 10 0.500.20 1 (0.50) 0.50 5 0.20+0.10 -0.05 1.500.20 0.100.10
Seating plane
Seating plane
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Request for your special attention and precautions in using the technical information and semiconductors described in this material
(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuits examples of the products. It neither warrants non-infringement of intellectual property right or any other rights owned by our company or a third party, nor grants any license. (3) We are not liable for the infringement of rights owned by a third party arising out of the use of the product or technologies as described in this material. (4) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (5) The products and product specifications described in this material are subject to change without notice for modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (6) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage, and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure mode, possible to occur to semiconductor products. Measures on the systems such as redundant design, arresting the spread of fire or preventing glitch are recommended in order to prevent physical injury, fire, social damages, for example, by using the products. (7) When using products for which damp-proof packing is required, observe the conditions (including shelf life and amount of time let standing of unsealed items) agreed upon when specification sheets are individually exchanged. (8) This material may be not reprinted or reproduced whether wholly or partially, without the prior written permission of Matsushita Electric Industrial Co., Ltd.
2002 JUL

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