s-8521b51mc-aukt2g Seiko Instruments Inc., s-8521b51mc-aukt2g Datasheet
s-8521b51mc-aukt2g
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s-8521b51mc-aukt2g Summary of contents
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... Output voltage: • Duty ratio: • The only peripheral components that can be used with this IC are a Pch power MOS FET or PNP transistor, a coil, a diode, and capacitors (If a PNP transistor is used, a base resistance and a capacitor will also be required). • Oscillation frequency: • ...
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... Power supplies for audio equipment, including portable CD players and headphone stereo equipment. • Fixed voltage power supply for cameras, video equipment and communications equipment. • Power supplies for microcomputers. • Conversion from four NiH or NiCd cells or two lithium-ion cells to 3 • Conversion of AC adapter input Package ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 Block Diagrams 1. S-8520 Series + Remark All the diodes in the figure are parasitic diodes. 2. S-8521 Series + Remark All the diodes in the figure are parasitic diodes. ...
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... S-8520 / 8521 Series Product Name Structure • The control types, product types, and output voltage for the S-8540 / 8541 series can be selected at the user’s request. Please refer to the “1. Product name” for the definition of the product name and “2. ...
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... Remark Please contact the SII marketing department for the availability of product samples other than those specified above. Table S-8520AxxMC Series S-8520BxxMC Series − S-8520B15MC-ARAT2G − S-8520B18MC-ARDT2G S-8520A20MC-AVFT2G S-8520A21MC-AVGT2G − S-8520B24MC-ARJT2G S-8520A25MC-AVKT2G S-8520B25MC-ARKT2G S-8520C25MC-BRKT2G S-8520A26MC-AVLT2G S-8520A27MC-AVMT2G S-8520B27MC-ARMT2G S-8520C27MC-BRMT2G S-8520A28MC-AVNT2G S-8520B28MC-ARNT2G S-8520C28MC-BRNT2G ...
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... S-8521A32MC-AXRT2G S-8521B32MC-ATRT2G S-8521C32MC-BTRT2G S-8521A33MC-AXST2G S-8521B33MC-ATST2G S-8521C33MC-BTST2G S-8521A34MC-AXTT2G S-8521B34MC-ATTT2G S-8521C34MC-BTTT2G S-8521A35MC-AXUT2G S-8521B35MC-ATUT2G S-8521C35MC-BTUT2G S-8521A36MC-AXVT2G S-8521B36MC-ATVT2G S-8521C36MC-BTVT2G − S-8521B40MC-ATZT2G − S-8521B44MC-AUDT2G S-8521A50MC-AYJT2G S-8521B50MC-AUJT2G S-8521C50MC-BUJT2G − S-8521B51MC-AUKT2G − S-8521B60MC-AUTT2G Table S-8521DxxMC Series S-8521ExxMC Series − S-8521E15MC-BLAT2G S-8521F15MC-BPAT2G S-8521D16MC-BXBT2G S-8521E16MC-BLBT2G − S-8521E17MC-BLCT2G S-8521D18MC-BXDT2G S-8521E18MC-BLDT2G S-8521F18MC-BPDT2G − ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 Pin Configuration SOT-23-5 Top view Figure 3 Table 3 Pin No. Pin name 1 Shutdown pin ON / OFF “H”: “L”: 2 VSS GND pin 3 VOUT Output voltage monitoring pin 4 EXT Connection pin for external transistor ...
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... When mounted on board [Mounted board] (1) Board size : (2) Board name : JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. (1) When mounted on board 700 600 ...
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... Overload detection time t pro (A type) Efficiency EFFI External parts Coil: Diode: Capacitor: Transistor: Base resistance (R Base capacitor (C The recommended components are connected to the IC, unless otherwise indicated. =V ×1 =2 OUT(S) IN The ON / OFF pin is connected to VIN pin Specified output voltage value, V ...
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... Duration from the time V is reduced to OUT the time the EXT pin obtains V Sumida Corporation CD54 (47 µ H) Matsushita Electric Industrial Co., Ltd. MA720 (Shottky type) Matsushita Electric Industrial Co., Ltd µ F tantalum type) Toshiba Corporation 2SA1213Y ): 0.68 k Ω 2200 pF (Ceramic type) b ≤ 2.0 V), I ...
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... Duration from the time V is reduced to OUT the time the EXT pin obtains V Sumida Corporation CD54 (47 µ H) Matsushita Electric Industrial Co., Ltd. MA720 (Shottky type) Matsushita Electric Industrial Co., Ltd µ F tantalum type) Toshiba Corporation 2SA1213Y ): 0.68 k Ω 2200 pF (Ceramic type) b ≤ 2.0 V), I ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series Measurement Circuits open EXT VIN OFF VSS Figure 5 A VIN + ON / OFF − Figure 6 0.68 kΩ 2200 pF EXT VIN VOUT + ON / OFF − VSS Figure 7 Seiko Instruments Inc. ...
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... Both of these effects constitute inherent drawbacks to those converters. In the S-8520 series the pulse width varies in the range from 0 to 100% according to the load current, yet ripple voltage produced by the switching can easily be removed by a filter since the switching frequency is always constant ...
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... This prevents the output voltage from overshooting. However, the soft start function of this IC is not able to perfectly prevent a rush current from flowing to the load (Refer to Figure 8 ). Since this rush current depends on the input voltage and load conditions, we recommend that you evaluate it by testing performance with the actual equipment ...
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... EXT pin will be held at "H" to keep the oscillation inactive. reference voltage keeps rising and exceeds the feedback voltage, the oscillation will resume. If the load is heavy when the oscillation is restarted, and the EXT pin holds the "L" level longer than the specified overload detection time (t enter intermittent operation mode, in which it repeats the actions described above ...
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... Oscillation frequencies The oscillation frequencies are selectable in 180 kHz (A and B types), 60 kHz (C, D types), and 300 kHz (E, F types). Because of their high oscillation frequency and low ripple voltage the and F types offer excellent transient response characteristics ...
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... In making the selection, please keep in mind that the upper limit of the operating voltage range is either types ( types), depending on whether the product comes with an overload protection circuit built in. ...
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... The capacitor inserted on the input side (C input current for better efficiency. supplied rough rule of thumb, you should use a value 100 µ F, although the actual value will depend on the impedance of the power in use and the load current value. For the output side capacitor (C Resistance) for smoothing the ripple voltage. However, notice that a capacitor with extremely low ESR (say, below 0.3 Ω ...
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... The EXT pin swings from voltage V a low threshold voltage has to be used so that the MOS FET will come on as required. If, conversely, the input voltage is high, select a MOS FET whose gate-source breakdown voltage is higher than the input voltage by at least several volts ...
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... A small R value will certainly contribute to increasing the output current, but it will also adversely b affect the efficiency. Moreover, in practice, a current may flow as the pulses or a voltage drop may take place due to the wiring resistance or some other reason. Determine an optimum value through experimentation. ...
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... Using a bipolar transistor + Using a Pch MOS FET transistor + Caution The above connection diagram and constant will not guarantees successful operation. Perform through evaluation using the actual application to set the constant. Tr VIN Oscillation circuit EXT PWM control or ...
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... Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. • SII claims no responsibility for any and all disputes arising out connection with any infringement of the products including this IC upon patents owned by a third party. ...
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... Application Circuits 1. External adjustment of output voltage The S-8520 / 8521 Series allows you to adjust the output voltage or to set the output voltage to a value over the preset output voltage range ( the products of this series, when external resistances (R and R ), and capacitor (C ...
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... S-8520 / 8521 Series On the other hand, a reactive current flows through R negligible value with respect to the load current in the actual use of the IC so that the efficiency characteristics will not be degraded. This requires that the value of R However, too large a value (more than 1 MΩ) for the R Check the influence of this value on actual equipment ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 Characteristics (Typical Data) 1. Examples of major parameters characteristics (1) Current consumption (I SS1 Ta=−40° [ Ta=85° Ta=25° (2) Oscillation frequency (f )-Input voltage (V ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series (3) EXT pin output current “H” (I −60 −50 −40 −30 −20 − (5) Soft start time (t )-Input voltage ( ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 (6) Overload detection time ( Ta=85° Ta=−40°C 10 Ta=25° [ Ta=85°C 3 Ta=25°C Ta=−40° [V] IN (7) ON/ OFF pin input voltage “H” ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series (9) Output voltage (V )-Input voltage(V OUT S-8521B30MC 3.08 3.07 I OUT 3.06 I OUT 3.05 3.04 3.03 3.02 3.01 3.00 2.99 2. S-8521F33MC 3.38 3.37 I 3.36 OUT I 3.35 OUT 3.34 3.33 3.32 3.31 3.30 3.29 3. S-8521B50MC (Ta=25°C) =0.1 mA =500 mA =100 mA I OUT [V] S-8521F50MC (Ta=25°C) =0.1 mA =100 mA ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 2. Transient Response Characteristics 2. 1 Power- load) OUT (1) S-8520 / 8521C30MC [2.5 V/div OUT [1 V/div ms/div] (2) S-8520 / 8521A30MC [2.5 V/div OUT [1 V/div ms/div] ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series 2. 2 Shutdown pin response ( (1) S-8520 / 8521C30MC OFF [1 V/div V/div ms/div] (2) S-8520 / 8521A30MC OFF [1 V/div OUT [1 V/div ms/div] ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 2. 3 Supply voltage variation (V (1) S-8520 / 8521C30MC [2.5 V/div OUT [0.2 V/div] t [0.5 ms/div] (2) S-8520 / 8521A30MC [2.5 V/div OUT [0.2 V/div] t [0.5 ms/div] (3) S-8520 / 8521E33MC [2.5 V/div OUT [0 ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series 2. 4 Load variation (1) S-8520 / 8521C30MC (V IN 500 mA I OUT 0 OUT [0.1 V/div] t [0.1 ms/div] (2) S-8520 / 8521A30MC (V IN 500 0 OUT [0.1 V/div] t [0.1 ms/div] (3) S-8520 / 8521E33MC =4 500 mA I OUT ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 Reference Data This reference data is intended to help you select peripheral components to be externally connected to the IC. Therefore, this information provides recommendations on external components selected with a view to accommodating a wide variety of IC applications. Characteristic data is duly indicated in the table below. Output ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series Output Product name voltage S-8520D30MC S-8521D30MC 3.0 V S-8520B30MC S-8521B30MC S-8520F33MC 3.3 V S-8521F33MC S-8520D50MC S-8521D50MC S-8520B50MC 5.0 V S-8521B50MC S-8520F50MC S-8521F50MC Component Product name Manufacturer name “L” value DC resistance Inductor CD54 CD105 CDH113 ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 1. Efficiency Characteristics: Output current (I (1) S-8520B30MC (CD105/47 µH, TM6201) 100 0.01 0 [mA] OUT (2) S-8520F33MC (D62F/22 µH, TM6201) 100 = 0.01 0 [mA] ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series (5) S-8521F33MC (D62F/22 µH, TM6201) 100 = 0.01 0 [mA] OUT (6) S-8520B50MC (CD54/47 µH, TM6201) 100 0.01 0 [mA] OUT (7) S-8520F50MC (D62F/22 µH, TM6201) ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 (9) S-8521B50MC (CD54/47 µH, TM6201) 100 0.01 0 [mA] OUT (10) S-8521F50MC (D62F/22 µH, TM6201) 100 = 0.01 0 [mA] OUT 100 =6 =9 ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series 2. Ripple Voltage Characteristics: Ripple voltage (V 2SA1213, SBD: MA720) (1) S-8520D30MC 240 200 I =500 mA OUT I =100 mA 160 OUT I =0.1 mA OUT 120 [V] IN (3) S-8520B30MC 240 200 =500 mA I OUT ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR Rev.8.3 _00 (9) S-8520B50MC 240 200 =500 mA I 160 OUT =100 mA I OUT 120 =0 OUT [V] IN (11) S-8520F50MC 240 200 =500 mA I OUT I =100 mA 160 OUT I =0.1 mA OUT 120 ...
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... STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR S-8520 / 8521 Series 3. PWM / PFM switching characteristics: Input voltage (V (1) S-8521D30MC [mA] OUT (3) S-8521F33MC [mA] OUT (5) S-8521B50MC [mA] OUT 40 )-Output current (I IN (2) S-8521B30MC ...
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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...