ASSP Power Supply Applications (General-Purpose DC/DC Converter)

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ASSP Power Supply Applications (General-Purpose DC/DC Converter)

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DS04-27239-1Ea
ASSP Power Supply Applications
(General-Purpose DC/DC Converter)
3-ch DC/DC Converter
MB39A112
DESCRIPTION
MB39A112 3-channel DC/DC converter using pulse width modulation (PWM) MB39A112 suitable down-conversion. 3-channel built TSSOP-20P package. Each channel controlled soft-start. MB39A112 contains constant voltage bias circuit output block, capable implementing efficient high-frequency DC/DC converter. ideal built-in power supply such ADSL modems.
REATURES
Supports down-conversion (CH1 CH3) Power supply voltage range Error amplifier threshold voltage 1.00 (CH1) 1.23 (CH2, CH3) Oscillation frequency range Built-in soft-start circuit independent loads Built-in timer-latch short-circuit protection circuit Built-in totem-pole type output P-channel devices Built-in constant voltage (VCCO bias circuit output block
PACKAGE
20-pin plastic TSSOP
(FPT-20P-M06)
Copyright©2003-2008 FUJITSU MICROELECTRONICS LIMITED rights reserved 2003.11
MB39A112
ASSIGNMENT
(TOP VIEW)
-INE1 -INE2
VCCO OUT1 OUT2 OUT3 GNDO CSCP -INE3
(FPT-20P-M06)
MB39A112
DESCRIPTION
Symbol INE1 INE2 INE3 CSCP GNDO OUT3 OUT2 OUT1 VCCO Descriptions soft-start setting capacitor connection terminal. error amplifer inverted input terminal. error amplifer output terminal. Control circuit power supply terminal. Triangular-wave oscillation frequency setting resistor connection terminal. Triangular-wave oscillation frequency setting capacitor connection terminal. Ground terminal. error amplifier output terminal. error amplifier inverted input terminal. soft-start setting capacitor connection terminal. soft-start setting capacitor connection terminal. error amplifier inverted input terminal. error amplifier output terminal. Timer-latch short-circuit protection capacitor connection terminal. Ground terminal. Power supply terminal driving output circuit. VCCO external gate driving terminal. external gate driving terminal. external gate driving terminal. Power supply terminal driving output circuit. (Connect same potential terminal).
MB39A112
BLOCK DIAGRAM
Threshold voltage
VREF
priority
-INE1
Comp.1 Drive1
VCCO
Error Amp1
OUT1
-INE2 VREF
priority
Threshold voltage 1.23
1.23 Error Amp2 Comp.2
Drive2 OUT2
-INE3
Threshold voltage 1.23
VREF 1.23 Error Amp3 Comp.3
Drive3 OUT3
priority
priority
Comp.
VCCO Bias Voltage
GNDO
CSCP UVLO
Error Power Supply Comp. Power Supply
UVLO release
bias VREF
ErrorAmp Reference V/1.23
Power ON/OFF
MB39A112
ABSOLUTE MAXIMUM RATINGS
Parameter Power supply voltage Output current Peak output current Power dissipation Storage temperature Symbol TSTG Conditions VCC, VCCO terminal OUT1, OUT2, OUT3 terminal Duty 1/fosc Duty) Rating 1280* Unit
package mounted dual-sided epoxy board WARNING: Semiconductor devices permanently damaged application stress (voltage, current, temperature, etc.) excess absolute maximum ratings. exceed these ratings.
RECOMMENDED OPERATING CONDITIONS
Parameter Power supply voltage Input voltage Output current Oscillation frequency Timing capacitor Timing resistor terminal capacitor Soft-start capacitor Short-circuit detection capacitor Operating ambient temperature Symbol fosc CSCP terminal CS1, CS2, terminal CSCP terminal Conditions VCC, VCCO terminal terminal OUT1, OUT2, OUT3 terminal terminal Value 1200 0.01 2600 1000 Unit
WARNING: recommended operating conditions required order ensure normal operation semiconductor device. device's electrical characteristics warranted when device operated within these ranges. Always semiconductor devices within their recommended operating condition ranges. Operation outside these ranges adversely affect reliability could result device failure. warranty made with respect uses, operating conditions, combinations represented data sheet. Users considering application outside listed conditions advised contact their representatives beforehand.
MB39A112
ELECTRICAL CHARACTERISTICS
(VCC VCCO Parameter Undervoltage Threshold voltage Lockout Protection Circuit Block Hysteresis width [UVLO] Short-circuit Protection Circuit Block [SCP] Triangular Wave Oscillator Block [OSC] Soft-start Block [CS1, CS2, CS3] Threshold voltage Input source current Reset voltage Oscillation frequency SymPin VHYS ICSCP VRST Conditions Value 6.35 0.67 6.55 0.15 0.72 6.75 0.77 Unit
fosc
1080
1200
1320
Charge current
2.25 INE1 2.25 2.25 2.25 INE2 INE3 2.25 2.25
Threshold voltage Input bias current Voltage gain Error Block (CH1) [Error Amp1] Frequency band width Output voltage
ISINK ISINK
0.99 1.218
1.00 1.5* 1.230 1.5*
1.01 1.242
Output source current ISOURCE Output sink current Threshold voltage Input bias current Error Block (CH2, CH3) [Error Amp2, Error Amp3] Voltage gain Frequency band width Output voltage
Output source current ISOURCE Output sink current Standard design value
(Continued)
MB39A112
(Continued) SymPin VT100 ISOURC
(VCC VCCO Parameter Conditions Value VCCO VCCO 150* VCCO Unit
Comparator Threshold voltage Block [PWM Comp.] Bias Voltage Block [VH] Output voltage Output source current
Duty cycle Duty cycle
Duty OUT1 OUT2 OUT3 Duty OUT1 OUT2 OUT3 OUT1 OUT2 OUT3 OUT1 OUT2 OUT3
Output Block [Drive]
Output sink current
ISINK
150*
Output resistor General Power supply current
19.5
Standard design value
MB39A112
TYPICAL CHARCTERISTICS
Power Supply Current Power Supply Voltage Power supply current (mA)
OPEN
Power supply voltage
Error (ERR1) Threshold Voltage Ambient Temperature Threshold voltage Threshold voltage
-0.5 -1.0 -1.5 -2.0
Error (ERR2, ERR3) Threshold Voltage Ambient Temperature
-0.5 -1.0 -1.5 -2.0 FB2(3)
Ambient temperature Triangular Wave Oscillation Frequency Timing Resistor Triangular wave oscillation frequency fosc (kHz)
10000
Ambient temperature
Triangular Wave Oscillation Frequency Timing Capacitor Triangular wave oscillation frequency fosc (kHz)
10000
1000
1000
1000
1000
1000
10000
Timing resistor
Timing capacitor (pF)
(Continued)
MB39A112
Triangular Wave Upper/Lower Limit Voltage Triangular Wave Oscillation Frequency Triangular wave upper/lower limit voltage
Lower limit
Triangular Wave Upper/Lower Limit Voltage Ambient Temperature Triangular wave upper/lower limit voltage
Lower limit
Upper limit
Upper limit
1000 1500 2000 2500 3000
Triangular wave oscillation frequency fosc (kHz) Triangular Wave Oscillation Frequency Ambient Temperature
Ambient temperature
Triangular Wave Oscillation Frequency Power Supply Voltage Triangular wave oscillation frequency fosc (kHz)
1400 1350 1300 1250 1200 1150 1100 1050 1000
Triangular wave oscillation frequency fosc (kHz)
1400 1350 1300 1250 1200 1150 1100 1050 1000
Ambient temperature
Power supply voltage
(Continued)
MB39A112
(Continued)
Error (CH1) Gain, Phase Frequency
Phase (deg)
Gain (dB)
-180
Error Amp1
Frequency (Hz) Error (CH2, CH3) Gain, Phase Frequency
Gain (dB)
-180
Phase (deg)
(12) (11)
1.23 (13) Error Amp2 (Error Amp3)
Frequency (Hz) Maximum Power Dissipation Ambient Temperature Maximum power dissipation (mW)
1400 1300 1280 1200 1100 1000
Ambient temperature
MB39A112
FUNCTION
DC/DC Converter Function
Triangular Wave Oscillator Block (OSC) triangular wave oscillator incorporates timing capacitor timing resistor connected respectively terminl (pin terminl (pin generate triangular oscillation waveform amplitude triangular waveforms input comparator Error Amplifier Block (Error Amp1, Error Amp2, Error Amp3) error amplifier detects DC/DC converter output voltage outputs control signals. addition, arbitrary loop gain connecting feedback resistor capacitor from output terminal inverted input terminal error amplifier, enabling stable phase compensation system. Also, possible prevent rush current power supply start-up connecting soft-start capacitor with terminl (pin terminl (pin10) terminl (pin which non-inverted input terminal Error Amp. error soft-start detection makes possible system operate fixed soft-start time that independent output load DC/DC converter. Comparator Block (PWM Comp.) comparator voltage-to-pulse width modulator that controls output duty depending input/ output voltage. comparator keeps output transistor while error amplifier output voltage remain higher than triangular wave voltage. Output Block output blobk totem pole configulation, capable driving external P-channel FET. Bias Voltage Block (VH) This bias voltage circuit outputs (Typ) minimum potential output circuit.
Protective Function
Timer Latch Short-circuit Protection Circuit (SCP) Each channel short-circuit detection comparator (SCP Comp.) which constantly compares error Amp. output level reference voltage. While DC/DC converter load conditions stable channels, short-circuit detection comparator output remains "L", CSCP terminal held level. load condition channel changes rapidly short-circuit load, causing output voltage drop, output short-circuit detection comparator that channel goes level. This causes external short-circuit protection capacitor CSCP connected CSCP terminal (pin charged. When capacitor CSCP charged threshold voltage (VTH 0.72 latch external turned (dead time this point, latch input closed CSCP terminal held level. latch applied timer-latch short-circuit protection circuit reset recycling power supply (VCC) (See SETTING TIME CONSTANT TIMER-LATCH SHORT-CIRCUIT PROTECTION CIRCUIT")
MB39A112
Undervoltage Lockout Protection Circuit Block (UVLO) transient state momentary decrease supply voltage, which occurs when power supply turned cause malfunction, resulting breakdown degradation system. prevent such malfunctions, under voltage lockout protection circuit detects decrease internal reference voltage with respect power supply voltage, turns output transistor, sets dead time 100% while holding CSCP terminal (pin level. circuit restores output transistor normal when supply voltage reaches threshold voltage undervoltage lockout protection circuit. Protection Circuit Operating Function Table This table refers output condition when each protection circuit operating. Operating circuit OUT1 OUT2 Short-circuit protection circuit Under-voltage lockout circuit OUT3
latch reset follows after short-circuit protection circuit actuated. Recycling resets latch whenever short-circuit protection circuit been actuated.
MB39A112
SETTING OUTPUT VOLTAGE
Error -INE1 1.00 1.00
CH2,
(-INE3) -INE2 (CS3)
Error 1.23
1.23
SETTING TRIANGULAR OSCILLATION FREQUENCY
triangular oscillation frequency determined timing capacitor (CT) connected terminal (pin timing resistor (RT) connected terminal (pin Triangular oscillation frequency fosc fosc (kHz)= 1200000 (pF)
MB39A112
SETTING SOFT-START DISCHARGE TIMES
prevent rush currents when turned soft-start connecting soft-start capacitors (CS1, CS3) terminal (pin channel terminal (pin channel terminal (pin channel respectively. Setting each control terminal (CTLX) from starts charging external soft-start capacitors (CS1, CS3) connected CS1, terminal about DC/DC converter output voltage rises proportion terminal voltage. Also, soft-start time obtained following formulas. Soft-start time (time output 100%) Soft-start circuit
-INE1 (-INE2) (-INE3) (CS2) (CS3) VREF Error
ts1[s] 0.100 CS1[µF] ts2[s] 0.123 CS2[µF] ts3[s] 0.123 CS3[µF]
priority
ON/OFF signal
OFF) CTLX (FB2) (FB3)
1.23 /1.0
UVLO
UVLO release
Soft-start operation 1.23 1.00
terminal voltage Error Amp. reference voltage
Soft-start time
CTLX signal
MB39A112
TREATMENT WITHOUT USING TERMINAL
When using soft-start function, open terminal (pin terminal (pin terminal (pin Without setting soft-start
"Open"
"Open"
"Open"
MB39A112
SETTING TIME CONSTANT TIMER-LATCH SHORT-CIRCUIT PROTECTION CIRCUIT
Each channel uses short-circuit detection comparator (SCP Comp.) always compare error amplifier's output level reference voltage. While DC/DC converter load conditions stable channels, short-circuit detection comparator output remains level, CSCP terminal (pin held level. load condition channel changes rapidly short-circuit load, causing output voltage drop, output short-circuit detection comparator goes level. This causes extemal shortcircuit protection capacitor CSCP connected CSCP terminal charged Short-circuit detection time tcscp tcscp[s] 0.72 CSCP [µF] When capacitor CSCP charged threshold voltage (VTH 0.72 latch external turned (dead time this time, latch input closed CSCP terminal (pin held level. detects short circuit, channels stopped. Timer-latch short-circuit protection circuit
-INE1 (-INE2) (-INE3) VREF
(CS2) (CS3)
Error
1.23 /1.0
(FB2) (FB3)
Comp.
[SCP]
UVLO release
CSCP UVLO
Latch
MB39A112
TREATMENT WITHOUT USING CSCP TERMINAL
When using timer-latch short-circuit protection circuit, connect CSCP terminal (pin with shortest distance. Treatment without using CSCP terminal
CSCP
MB39A112
EQUIVALENT CIRCUIT
<<Short-circuit detection block>>
VREF (3.5
<<Triangular wave oscillator block (RT)
<<Triangular wave oscillator block (CT)
VREF (3.5
protection element
protection element
CSCP protection element
VREF (3.5
<<Soft-start block>>
VREF (3.5 VREF (3.5 -INE1
<<Error amplifier block (CH1)
1.00
<<Error amplifier block (CH2, CH3)
VREF (3.5 1.23
<<PWM comparator block>>
<<Bias voltage block>>
VCCO VCCO
<<Output block>>
OUTX GNDO GNDO
Each channel
MB39A112
APPLICATION EXAMPLE
Stepdown
(1.2
-INE1
VREF
Threshold voltage
Error Amp1 Comp.1
VCCO Drive1 OUT1
ON/OFF signal
OFF) CTL1
0.022
priority
Comp.2 Drive2 OUT2
Stepdown
(3.3 0.15
-INE2
VREF
Threshold voltage 1.23
Error Amp2
ON/OFF signal
OFF) CTL2
0.01
priority
1.23
Stepdown
(5.0 0.15
-INE3
Threshold voltage 1.23
VREF 1.23 Error Amp3 Comp.3
ON/OFF signal
OFF) CTL3
Drive3
OUT3
0.01
priority
priority
Comp.
VCCO Bias Voltage
GNDO
Charge current
1000
CSCP
UVLO
Error Power Supply Comp. Power Supply
ErrorAmp Reference V/1.23
VREF Power ON/OFF
UVLO release
bias
MB39A112
PARTS LIST
COMPONENT C11, C13, C16, Note SANYO TOKO ITEM Diode Diode Inductor Inductor Inductor Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Ceramics Condenser Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor SANYO Electric Co., Ltd. TOKO Inc. Corporation SUSUMU Co., Ltd. SPECIFICATION 0.55 (Max) (Max) 0.022 0.01 1000 2.57 21.4 1.49 41.2 VENDOR SANYO SANYO SANYO SANYO TOKO TOKO TOKO PARTS MCH3312 MCH3308 SBE001 SBE005 A916CY-2R0M A916CY-3R3M A916CY-100M C3216JB1E225K C3216JB1A475M C1608JB1H104K C1608JB1H223K C1608CH1H101J C1608JB1H103K C1608JB1H104K C1608JB1H102K RR0816P-222-D RR0816P-183-D RR0816P-104-D RR0816P-821-D RR0816P-512-D RR0816P-472-D RR0816P-563-D RR0816P-363-D RR0816P-821-D RR0816P-681-D RR0816P-303-D RR0816P-103-D RR0816P-102-D
MB39A112
SELECTION COMPONENTS
switching should rated least more than maximum input voltage. minimize continuity loss, with (ON) between drain source. high input voltage high frequency operation, on-cycle switching loss will higher that power dissipation must considered. this application, SANYO MCH3312 MCH3308 used. Continuity loss, on/off-cycle switching loss total loss determined following formulas. selection must ensure that peak drain current does exceed rated values. Continuity loss (ON) Duty
On-cycle switching loss (ON) (ON) (Max) fosc
Off-cycle switching loss (OFF) (OFF) (Max) (Max) fosc
Total loss (ON) (OFF)
Example Using MCH3312 Input voltage output voltage drain current oscillation frequency fOSC 2350 kHz, drain-source resistance RDS(ON) Drain current (Max) (Max) (Max)
2350
1.61
Drain current (Min) (Min) (Min)
2350
1.39
MB39A112
(ON) Duty 1.52 0.18 0.04 (ON) fosc 10-9 2350 0.02
(OFF)
(Max) fosc 1.61 10-9 2350 0.066
(ON) (OFF) 0.04 0.02 0.066 0.126 above power dissipation figures MCH3312 satisfied with ample margin Input voltage output voltage drain current oscillation frequency fOSC 2350 kHz, drain-source resistance RDS(ON) Drain current (Max) (Max) (Max) 10-6 1.15 Drain current (Min) (Min) (Min) 0.85 (ON) Duty 0.18 0.275 0.0495
2350
0.275
2350
0.275
MB39A112
(ON) (OFF) fosc 10-9 2350 0.0136 (Max) fosc 1.15 10-9 2350 0.047
(ON) (OFF) 0.0495 0.0136 0.047 0.11
above power dissipation figures MCH3312 satisfied with ample margin Example Using MCH3308 Input voltage output voltage drain current oscillation frequency fosc 2350 kHz, drain-source resistance (ON) Drain current (Max) (Max) (Max) 2350 0.417
0.36
Drain current (Min) (Min) (Min) 2350 0.417
0.24
(ON) Duty 0.32 0.417 0.023
MB39A112
(ON) (OFF) fosc 10-9 2350 0.0056
(Max) fosc 0.36 10-9 2350 0.0068
(ON) (OFF) 0.023 0.0056 0.0068 0.0354 above power dissipation figures MCH3308 satisfied with ample margin Inductors selecting inductors, course essential apply more current than rated capacity inductor, also note that lower limit ripple current critical point that reached will cause discontinuous operation considerable drop efficiency. This prevented choosing higher inductance value, which will enable continuous operation under light loads. Note that inductance value high, however, direct current resistance (DCR) increased this will also reduce efficiency. inductance must point where efficiency greatest. Note also that superimposition characteristics become worse load current value approaches rated current value inductor, that inductance value reduced ripple current increases, causing loss efficiency. selection rated current value inductance value will vary depending where point peak efficiency lies with respect load current. Inductance values determined following formulas. value load current conditions that peak peak value ripple current load current less. Inductance value (VIN Example (VIN Vo1) -1.2) 0.61
2350
MB39A112
(VIN Vo2) (12-3.3) 2.04 (VIN Vo3) 8.28
2350 0.275
2350 0.417
Inductance values derived from above formulas values that provide sufficient margin continuous operation maximum load current, which continuous operation possible light loads. therefore necessary determine load level which continuous operation becomes possible. this application, TOKO A916CY-2R0M, A916CY-3R3M A916CY-100M used. load current value under continuous operating conditions determined following formula. Load current value under continuous operating conditions tOFF
Example Using A916CY-2R0M (allowable tolerance rated current
tOFF 2350 0.1)
0.11
Example Using A916CY-3R3M (allowable tolerance rated current 2.57
tOFF 2350 0.275)
0.15
MB39A112
Example Using A916CY-100M 10.0 (allowable tolerance rated current 1.49
tOFF 2350 0.417)
10-6
62.0
determine whether current through inductor within rated values, necessary determine peak value ripple current well peak-to-peak values ripple current that affect output ripple voltage. peak value peak-to-peak value ripple current determined following formulas. Peak value
Peak-to-peak value
Example Using A916CY-2R0M (allowable tolerance rated current Peak value 1.61 2350
Peak-to-peak value 10-6 0.23 2350
MB39A112
Example Using A916CY-3R3M (allowable tolerance rated current 2.57 Peak value 1.15 10-6 2350 0.275
Peak-to-peak value 0.309
2350
0.275
Example Using A916CY-100M 10.0 (allowable tolerance rated current 1.49 Peak value 0.36
2350 0.417
Peak-to-peak value 0.124
2350
0.417
MB39A112
Flyback diode flyback diode generally used Shottky barrier diode (SBD) when reverse voltage diode less than characteristics higher speed terms faster reverse recovery time, lower forward voltage, ideal archiving high efficiency. long reverse voltage sufficiently higher than input voltage, average current flowing through diode within average output current level, peak current within peak surge current limits, there problem. this application SANYO SBE001, SBS005 used. diode average current diode peak current calculated following formulas. Diode mean current
Diode peak current IDip IDip tOFF)
Example Using SBE001 reverse voltage) average output current peak surge current (forward voltage) 0.55 Diode mean current 1.35 Diode peak current IDip 1.61 Diode mean current
0.1)
tOFF)
0.275) 0.725
MB39A112
Diode peak current IDip 1.15
tOFF)
Example Using SBS005 reverse voltage) average output current peak surge current (forward voltage) Diode mean current
0.417) 0.175
Diode peak current IDip 0.36
tOFF)
MB39A112
REFERENCE DATA
Conversion Efficiency Load Current Characteristics (CH1)
output CTL1 CTL2 CTL3
Conversion efficiency
Load current Conversion Efficiency Load Current Characteristics (CH2)
output CTL1 CTL2 CTL3
Conversion efficiency
Load current Conversion Efficiency Load Current Characteristics (CH3)
output CTL1 CTL2 CTL3
Conversion efficiency
Load current
(Continued)
MB39A112
Conversion Efficiency Load Current Characteristics (CH1)
output CTL1 CTL2 CTL3
Conversion efficiency
Load current Conversion Efficiency Load Current Characteristics (CH2)
output CTL1 CTL2 CTL3
Conversion efficiency
Load current Conversion Efficiency Load Current Characteristics (CH3)
output CTL1 CTL2 CTL3
Conversion efficiency
100m
Load current
(Continued)
MB39A112
(Continued)
Conversion Efficiency Load Current Characteristics (CH1)
output CTL1 CTL2 CTL3
Conversion efficiency
Load current Conversion Efficiency Load Current Characteristics (CH2)
output CTL1 CTL2 CTL3
Conversion efficiency
Load current Cconversion Efficiency Load Current Characteristics (CH3)
output CTL1 CTL2 CTL3
Cconversion efficiency
Load current
MB39A112
USAGE PRECAUTION
Printed circuit board ground lines should with consideration common impedance. Take appropriate static electricity measures. Containers semiconductor materials should have anti-static protection made conductive material. After mounting, printed circuit boards should stored shipped conductive bags containers. Work platforms, tools instruments should properly grounded. Working personnel should grounded with resistance between body ground. apply negative voltages. negative voltages below -0.3 create parasitic transistors lines, which cause abnormal operation.
ORDERING INFORMATION
Part number MB39A112PFT Package 20-pin plastic TSSOP (FPT-20P-M06) Remarks
MB39A112
PACKAGE DIMENSION
20-pin plastic TSSOP (FPT-20P-M06) Note Resin protrusion. (Each side +0.15 (.006) Max) Note These dimensions include resin protrusion. Note Pins width pins thickness include plating thickness. Note Pins width include cutting remainder.
0.17±0.05 (.007±.002)
6.50±0.10(.256±.004)
INDEX
4.40±0.10 6.40±0.20 (.173±.004) (.252±.008)
Details part 1.05±0.05 (Mounting height) (.041±.002) LEAD
0.65(.026)
0.24±0.08 (.009±.003) 0.13(.005)
0~8°
+0.03 +.001
(0.50(.020)) 0.60±0.15 (.024±.006)
0.07 -0.07 .003 -.003 (Stand off) 0.25(.010)
0.10(.004)
2003 FUJITSU LIMITED F20026S-c-3-3
Dimensions (inches) Note values parentheses reference values.
MB39A112
MEMO
FUJITSU MICROELECTRONICS LIMITED
Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0722, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3387 http://jp.fujitsu.com/fml/en/ further information please contact: North South America FUJITSU MICROELECTRONICS AMERICA, INC. 1250 Arques Avenue, Sunnyvale, 94085-5401, U.S.A. Tel: +1-408-737-5600 Fax: +1-408-737-5999 http://www.fma.fujitsu.com/ Europe FUJITSU MICROELECTRONICS EUROPE GmbH Pittlerstrasse 63225 Langen, Germany Tel: +49-6103-690-0 Fax: +49-6103-690-122 Korea FUJITSU MICROELECTRONICS KOREA LTD. KOSMO TOWER, 1002 Daechi-Dong, Kangnam-Gu,Seoul 135-280 Korea Tel: +82-2-3484-7100 Fax: +82-2-3484-7111 http://www.fmk.fujitsu.com/ Asia Pacific FUJITSU MICROELECTRONICS ASIA LTD. Lorong Chuan, #05-08 Tech Park, Singapore 556741 Tel: +65-6281-0770 Fax: +65-6281-0220 FUJITSU MICROELECTRONICS SHANGHAI CO., LTD. Rm.3102, Bund Center, No.222 Road(E), Shanghai 200002, China Tel: +86-21-6335-1560 Fax: +86-21-6335-1605 http://cn.fujitsu.com/fmc/ FUJITSU MICROELECTRONICS PACIFIC ASIA LTD. 10/F., World Commerce Centre, Canton Road Tsimshatsui, Kowloon Hong Kong Tel: +852-2377-0226 Fax: +852-2376-3269 http://cn.fujitsu.com/fmc/tw
Rights Reserved. contents this document subject change without notice. Customers advised consult with sales representatives before ordering. information, such descriptions function application circuit examples, this document presented solely purpose reference show examples operations uses FUJITSU MICROELECTRONICS device; FUJITSU MICROELECTRONICS does warrant proper operation device with respect based such information. When develop equipment incorporating device based such information, must assume responsibility arising such information. FUJITSU MICROELECTRONICS assumes liability damages whatsoever arising information. information this document, including descriptions function schematic diagrams, shall construed license exercise intellectual property right, such patent right copyright, other right FUJITSU MICROELECTRONICS third party does FUJITSU MICROELECTRONICS warrant non-infringement third-party's intellectual property right other right using such information. FUJITSU MICROELECTRONICS assumes liability infringement intellectual property rights other rights third parties which would result from information contained herein. products described this document designed, developed manufactured contemplated general use, including without limitation, ordinary industrial use, general office use, personal use, household use, designed, developed manufactured contemplated accompanying fatal risks dangers that, unless extremely high safety secured, could have serious effect public, could lead directly death, personal injury, severe physical damage other loss (i.e., nuclear reaction control nuclear facility, aircraft flight control, traffic control, mass transport control, medical life support system, missile launch control weapon system), requiring extremely high reliability (i.e., submersible repeater artificial satellite). Please note that FUJITSU MICROELECTRONICS will liable against and/or third party claims damages arising connection with above-mentioned uses products. semiconductor devices have inherent chance failure. must protect against injury, damage loss from such failures incorporating safety design measures into your facility equipment such redundancy, fire protection, prevention over-current levels other abnormal operating conditions. Exportation/release products described this document require necessary procedures accordance with regulations Foreign Exchange Foreign Trade Control Japan and/or export control laws. company names brand names herein trademarks registered trademarks their respective owners.
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ASSP Power Supply Applications (General-Purpose DC/DC Converter)

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