S-8520 Seiko Instruments, S-8520 Datasheet
S-8520
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S-8520 Summary of contents
Page 1
... With a built-in overload protection circuit. Overload detection time: 4 ms. typ. (A Series), 14 ms. typ. (C Series) or 2.6 ms. typ.(E Series). The S-8520/8521 Series consists of CMOS step-down switching regulator- controllers with PWM-control (S-8520) and PWM/PFM-switched control (S- 8521). These devices contain a reference voltage source, oscillation circuit, error amplifier, and other components ...
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... PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers S-8520/8521 Series Block Diagram Note: The diode inside the parasitic diode. Selection Guide: 1. Product Name S - 852 XXX - T2 2 Oscillation VIN Circuit PWM or EXT PWM/PFM- Switched Control SD Circuit ON / OFF Figure 1 Block Diagram Tape specifications ...
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... S-8521A35MC-AXU-T2 S-8520B35MC-ARU-T2 S-8521A36MC-AXV-T2 S-8520B36MC-ARV-T2 S-8521A50MC-AYJ-T2 S-8520B50MC-ASJ-T2 S-8521CXXMC S-8520DXXMC Series S-8521C16MC-BTB-T2 S-8521C25MC-BTK-T2 S-8520D25MC-BVK-T2 S-8521D25MC-BXK-T2 S-8520D27MC-BVM-T2 S-8521D27MC-BXM-T2 S-8520D28MC-BVN-T2 S-8521D28MC-BXN-T2 S-8520D29MC-BVO-T2 S-8521D29MC-BXO-T2 S-8521C30MC-BTP-T2 S-8520D30MC-BVP-T2 S-8521D30MC-BXP-T2 S-8520D31MC-BVQ-T2 S-8521D31MC-BXQ-T2 S-8520D32MC-BVR-T2 S-8521D32MC-BXR-T2 S-8521C33MC-BTS-T2 S-8520D33MC-BVS-T2 S-8521D33MC-BXS-T2 S-8521C34MC-BTT-T2 S-8520D34MC-BVT-T2 S-8520D35MC-BVU-T2 S-8521D35MC-BXU-T2 S-8521C36MC-BTV-T2 S-8520D36MC-BVV-T2 S-8521D36MC-BXV-T2 S-8521C50MC-BUJ-T2 S-8520D50MC-BWJ-T2 S-8521D50MC-BYJ-T2 S-8521EXXMC ...
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... EXT pin current Power dissipation Operating temperature range Storage temperature range *1. V +12 V for S-8520/21A/C/ 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. ...
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... Base resistance (R Base capacitor (C The power-off pin is connected to VIN. Notes: The output voltage indicated above represents a typical output voltage set up. These specifications apply in common to both S-8520 and S-8521, unless otherwise noted. *1. V (S) Specified output voltage value. OUT V (E) Actual output voltage value. ...
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... S-8520 and S-8521, unless otherwise noted. *1. V (S) Specified output voltage value. OUT V (E) Actual output voltage value. OUT *2. Applicable to the S-8521C Series and S-8521D Series. *3. Applicable to the S-8520C Series and S-8521C Series Conditions − S-8520/21C Series ...
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... Base resistance (R Base capacitor (C The power-off pin is connected to VIN. Notes: The output voltage indicated above represents a typical output voltage set up. These specifications apply in common to both S-8520 and S-8521, unless otherwise noted. *1. V (S) Specified output voltage value. OUT V (E) Actual output voltage value. ...
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... Both of these effects constitute inherent drawbacks to those converters. In converters of the S-8520 Series, the pulse width varies in a range from 100 %, according to the load current, and yet ripple voltage produced by the switching can easily be removed through a filter because the switching frequency remains constant ...
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... Soft-Start Function The S-8520/21 Series comes with a built-in soft-start circuit. This circuit enables the output voltage to rise gradually over the specified soft-start time, when the power is switched on or when the power-off pin remains at the "H" level. This prevents the output voltage from overshooting. ...
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... Figure 6 Waveforms Appearing at EXT Pin As the Overload Protection Circuit Operates 5. 100 % % % % Duty Cycle The S-8520/21 Series operates with a maximum duty cycle of 100 %. When Series product not provided with an overload protection circuit is used, the switching transistor can be kept ON to supply current to the load continually, even in cases where the input voltage falls below the preset output voltage value ...
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... Perform thorough evaluations under the conditions of actual service and decide on an optimum L-value. In many applications, selecting a value of A/B/C/D Series 47µ Series 22 µH will allow a S-8520/21 Series product to yield its best characteristics in a well balanced manner. ...
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... MOS FET type or bipolar (PNP) typ. 5.1 Enhancement MOS FET type The EXT pin of the S-8520/21 Series is capable of directly driving a Pch power MOS FET with a gate capacity of some 1000 pF. When a Pch power MOS FET is chosen, because it has a higher switching speed than a PNP type bipolar transistor and because power losses due to the presence of a base current are avoided, efficiency will higher than when other types of transistor are employed ...
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... EXTL - value of bipolar transistor by the equation inserted in parallel with resistance 0.7 OSC value differs depending upon the characteristics of the bipolar b value based on the experiment result. b Seiko Instruments Inc. S-8520/8521 Series b Determine an optimum value through , as shown in Figure 7, the ...
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... PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers S-8520/8521 Series Standard Circuits: (1) Using a bipolar transistor (2) Using a Pch MOS-FET transistor Precautions: Install the external capacitors, diode, coil, and other peripheral components as close to the IC as possible, and secure grounding at a single location. ...
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... Application Circuits: 1. External adjustment of output voltage The S-8520/21 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 capacitor C are added, as illustrated in Figure 11 ...
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... There is a tradeoff between the voltage accuracy of the output OUT and the reactive current. This should be taken into consideration based on the requirements of the intended application. Deviations in the absolute value of internal resistances R the S-8520/21 Series, and are broadly classified as follows: Output voltage 1 2.0 V → 5.16 MΩ to 28.9 MΩ Output voltage 2 2.5 V → 4.44 MΩ to 27.0 MΩ ...
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... Fosc-V IN S-8520/21(Fosc:60 kHz Fosc 60 (kHz) Ta=− (6) Fosc-V IN S-8520/21(Fosc:300 kHz) 360 340 320 Fosc Ta=25 300 (kHz) 280 Ta=85 260 Ta=−40 240 Seiko Instruments Inc. S-8520/8521 Series Ta=25 Ta=85 Ta=− ...
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... EXTL IN S-8520/ Ta=−40 I EXTL Ta=25 30 (mA Ta= (V) (10 S-8520/21(Fosc:180 kHz) 25 Ta=−40 20 Ta= (ms) 10 Ta= (V) (12 PRO IN S-8520/21(Fosc:60 kHz Ta=−40 22 Ta=85 T PRO 18 (ms) 14 Ta= ...
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... SL (V) 0.9 0.7 0.5 0 (18 OUT IN S-8521B50MC (Ta=25°C) 5.08 5.07 =0.1 mA 5.06 =500 mA 5.05 5.04 V OUT 5.03 (V) 5.02 5.01 =100 mA I OUT 5.00 4.99 4. Seiko Instruments Inc. S-8520/8521 Series Ta=85 Ta=25 Ta=− (V) IN Ta=−40 Ta=25 Ta= ( =0.1 mA OUT I =500 mA OUT I =100 mA OUT ...
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... PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers S-8520/8521 Series (19 OUT IN S-8521F33MC (Ta=25°C) 3.38 3.37 I 3.36 OUT I 3.35 OUT 3.34 V OUT 3.33 (V) 3.32 3.31 3.30 3.29 3. (20 OUT IN S-8521F50MC (Ta=25°C) 5.07 5.06 =0.1 mA 5.05 =100 mA 5.04 5.03 V OUT 5.02 (V) 5.01 5.00 4.99 I =500 mA OUT 4.98 4. (V) Seiko Instruments Inc. Rev.7.4 =0 OUT I =100 mA OUT ...
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... S-8520/1C30MC ( (2.5 V/div OUT (1 V/div S-8520/1A30MC ( (2.5 V/div OUT (1 V/div S-8520/1E33MC ( (2.5 V/div OUT (1 V/div Seiko Instruments Inc. S-8520/8521 Series :0 → 9 t(2 ms/div) :0 → 9 t(1 ms/div) :0 → 9 t(1 ms/div) ...
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... V OUT (1 V/div t(1 ms/div V→ → → → 1 No-load) ON/OFF OUT S-8520/1C30MC ( ON/OFF OUT (1 V/div S-8520/1A30MC ( ON/OFF OUT (1 V/div S-8520/1E33MC ( ON/OFF OUT (1 V/div Seiko Instruments Inc. ...
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... V→ → → → V→ → → → S-8520/1C33MC ( (2.5 V/div OUT (0.2 V/div) S-8520/1A30MC ( (2.5 V/div OUT (0.2 V/div) S-8520/1E33MC ( (2.5 V/div OUT (0.2 V/div) Seiko Instruments Inc. S-8520/8521 Series :500 mA) OUT t(0.5 ms/div) :500 mA) OUT t(0.5 ms/div) :500 mA) OUT t(0.5 ms/div) ...
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... OUT (0.1 V/div) t(0.1 ms/div) S-8520/1E33MC (V :4 500 mA I OUT 0 OUT (0.1V/div) t(0.1 ms/div) 24 S-8520/1C30MC (V 500 mA I OUT 0 OUT (0.1 V/div) S-8520/1A30MC (V 500 mA I OUT 0 OUT (0.1 V/div) S-8520/1E33MC (V 500 mA I OUT 0 OUT (0.1 V/div) Seiko Instruments Inc. Rev.7.4 :3 t(5 ms/div) :3 t(10 ms/div) :4 ...
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... IRF7606 MA737 TM6201 MA720 IRF7606 MA737 TM6201 MA720 IRF7606 MA737 TM6201 MA720 IRF7606 MA737 TM6201 MA720 IRF7606 MA737 Seiko Instruments Inc. S-8520/8521 Series Application (µF) 47 ≤ ≤ OUT IN 22 ≤0 ≤ OUT IN ↑ ≤ ≤ OUT IN 47× ...
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... PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers S-8520/8521 Series No. Product Name (20) S-8520D30MC (21) S-8521D30MC (22) S-8520B30MC (23) S-8521B30MC (24) S-8520F33MC (25) S-8521F33MC (26) S-8520D50MC (27) S-8521D50MC (28) S-8520B50MC (29) S-8521B50MC (30) S-8520F50MC (31) S-8521F50MC Component Product Name Inductor CD54 CD105 CDH113 D62F Diode MA720 MA737 Output Capacity F93 TE External Transistor 2SA1213Y ...
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... S-8521D30MC − Efficiency (CD54/47 µH,IRF7606) I OUT 100 90 80 Efficiency (%) 100 1000 (mA) Seiko Instruments Inc. S-8520/8521 Series 100 I (mA) OUT 0.01 0 100 ...
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... PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers S-8520/8521 Series (6) S-8521B30MC I − Efficiency (CD105/47 µH,TM6201) OUT 100 90 80 Efficiency (%) 0.01 0 OUT (8) S-8521F33MC I − Efficiency (D62F/22 µH,TM6201) OUT 100 = Efficiency (%) 0.01 0 ...
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... 100 1000 (17) S-8521B50MC I − Efficiency (CD105/47 µH,IRF7606) OUT 100 90 80 Efficiency (%) =6 =9 100 1000 Seiko Instruments Inc. S-8520/8521 Series = 0.01 0 100 I (mA) OUT 0.01 0 100 I (mA) OUT = ...
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... PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers S-8520/8521 Series (18) S-8521F50MC − Efficiency (D62F/22 µH,TM6201) I OUT 100 Efficiency (%) 0.01 0 OUT 30 (19) S-8521F50MC − Efficiency (CDH113/22 µH,IRF7606) I OUT 100 90 80 Efficiency (%) 100 ...
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... V (V) IN (23) Vrip−V S-8521B30MC(C Vrip (mV (V) IN (25) Vrip−V S-8521F33MC(C Vrip (mV (V) IN Seiko Instruments Inc. S-8520/8521 Series IN 240 200 =500 mA I OUT 160 =100 mA I OUT 120 I =0.1 mA OUT ( :22 µ ...
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... PWM Control & PWM/PFM Control Step-Down Switching Regulator-Controllers S-8520/8521 Series (26) Vrip−V IN S-8520D50MC(C :47 µF×2) OUT 240 200 =500 mA I OUT =100 mA I OUT 160 I =0.1 mA OUT Vrip 120 (mV (28) Vrip−V IN :22 µF×2) S-8520B50MC(C OUT 240 ...
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... S-8521D50MC PWM/PFM switching characteristics (V) 100 1000 (mA) (19) S-8521F50MC PWM/PFM switching characteristics (V) 100 1000 (mA) Seiko Instruments Inc. S-8520/8521 Series 100 I (mA) OUT 100 I (mA) OUT 100 I (mA) OUT 1000 ...
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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 ...