s-8333aaca-t8t1g Seiko Instruments Inc., s-8333aaca-t8t1g Datasheet
s-8333aaca-t8t1g
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s-8333aaca-t8t1g Summary of contents
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... Because its minimum operating voltage is as low as 1.8 V, this switching regulator is ideal for the power supply of an LCD or for portable systems that operate on a low voltage. The internal oscillation frequency can be set up to 1.133 MHz, via the resistor connected to the ROSC pin ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series Block Diagram L VIN EXT VSS 2 SD RDuty UVLO Oscillator Maximum duty + soft-start circuit − PWM + comparator Error amplifier Timer latch − short-circuit Reference voltage protection circuit (1.0 V) soft-start ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 Product Name Structure 1. Product name S-8333 xxxx G Package name(abbreviation) and packing specifications I8T1: SNT-8A, Tape T8T1: 8-Pin TSSOP, Tape Soft-start time setting UVLO setting A: 2 ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series Pin Configurations SNT-8A Top view Figure 2 8-Pin TSSOP Top view Figure 3 4 Pin No. Symbol CSP 7 4 VIN 6 5 EXT 5 6 VSS ...
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... 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. Figure 4 Power Dissipation of Package (When mounted on board) Table 3 Absolute Maximum Ratings (Unless otherwise specified 25° ...
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... Set max. duty; Between 47 and 88 Between 47 and This range of max. duty is the typical value when an ideal resistor is connected externally. In actual use necessary to take account the dispersion (±5%) into this value. *3. The short-circuit protection time can be set by the external capacitor. Although the maximum set value by the external capacitor is ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 External Parts When Measuring Electrical Characteristics Element Name Inductor Diode Output capacitor Transistor Oscillation frequency setting resistor Maximum duty ratio setting resistor Short-circuit protection delay time setting capacitor ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series Measurement Circuits RFB1 CFB RZ RFB2 CSP A VIN CSP CIN Oscilloscope Figure CSP L SD VIN M1 CIN CL CSP Figure 6 Seiko Instruments Inc. RDuty ROSC VSS ...
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... V OUT Therefore, the voltage of the FB pin stays 0 V and the EXT output is in the step up status between the “H” and “L” levels due to the maximum duty. The maximum duty at this time is approximately 7% and the rush current at power application is controlled. The maximum duty soft start is accomplished by gradually increasing the duty width up to the maximum duty set by the external resistor RDuty (refer to Figure 8) ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series 3.3 V Input voltage ( 9.2 V Output voltage (V ) OUT 0 V 1.0 V Error amplifier reference voltage pin voltage ( 3.3 V EXT pin voltage (V ) EXT V→3 9 ...
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... Timer latch short-circuit protection function This IC has a timer latch short-circuit protection circuit that stops the switching operation when the output voltage drops for a specific time due to output short-circuiting. A capacitor (CSP) that is used to set the delay time of this short-circuit protection circuit can be connected to the CSP pin. ...
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... S-8333 Series 5. Error amplifier The error amplifier outputs the PWM control signal so that the voltage of the FB pin is held at a specific value (1 V). By connecting a resistor (RZ) and capacitor (CZ) to the output pin (CC pin) of the error amplifier in series, an optional loop gain can be set, enabling stabilized phase compensation. ...
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... Equivalent Series Resistance When substituting equation (11) for equation (15): − OUT = V − Therefore to reduce the ripple voltage important that the capacitor connected to the output pin has a large capacity and a small ESR. during t OUT − ................................................................................................................. (6) L − ...
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... If a capacitor whose equivalent series resistance is between 30 m Ω and 500 m Ω is used as the output capacitor, the adjustable range of the phase compensation is wider; however, note that other characteristics may be affected by ripple voltage or other conditions at this time ...
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... If a MOS FET with a threshold that is near the UVLO detection voltage is used, a large current may flow, stopping the output voltage from rising and possibly generating heat in the worst case. Select a MOS FET with a threshold that is sufficiently lower than the UVLO detection voltage value ...
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... OSC With the S-8333 Series, the maximum duty ratio can be set in a range of 47% to 88.5% (between 47 to 80%, if the oscillation frequency is less than 500 kHz external resistor. Connect the resistor across the RDuty and VSS pins. Select the resistance by using the following equation and referring to Figure 13. The maximum duty ratio fluctuates according to the oscillation frequency ...
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... OUT R FB2 Connect divider resistors RFB1 and RFB2 as close to the IC to minimize effects from of noise. If noise does have an effect, adjust the values of RFB1 and RFB2 so that R CFB connected in parallel with RFB1 is a capacitor for phase compensation. Select the optimum value of this capacitor at which the stable operation can be ensured from the values of the inductor and output capacitor ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series Standard Circuit L VIN EXT 0.1 µF VSS Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. ...
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... Evaluate fully using the actual application when designing. • This IC builds in soft start function, starts reference voltage gradually, and it is controlled so that FB pin voltage and reference voltage become this potential. Therefore, keep in mind that it will maximum duty state according to the factor of IC exterior if FB pin voltage is held less than reference voltage. ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series Characteristics (Typical Data) 1. Example of Major Temperature Characteristics (Ta = −40 to 85° SS1 IN 800 f = 1133 kHz (R OSC 700 600 f = 700 kHz (R OSC 500 400 300 f = 286 kHz (R 200 ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 = 3 vs PRO IN 70 (CSP = 0.1 µF) t PRO 60.0 50.0 40.0 30.0 20.0 10.0 0 −40 − [°C] V vs. Ta UVLOHYS 0.35 0.30 V UVLOHYS 0.25 0.20 0.15 0.10 V 0.05 UVLOHYS 0 −40 − [° CCL IN 100 ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series 2. Example of Major Power Supply Dependence Characteristics (Ta = 25° 1400 f = 1133 kHz OSC 1200 (R = 120 kΩ) OSC 1000 f = 700 kHz OSC 800 (R = 200 kΩ) OSC 600 400 ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 t vs. V PRO IN 70.0 =50 ms (CSP = 0.1 µF) t PRO 60.0 50.0 40.0 30.0 20 vs. V CCL IN 100 [ vs. V CCH −100 −90 −80 − ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series 3. Example of External Parts Dependence Characteristics f vs 3.3 V) OSC OSC IN 1600 1400 Ta = −40°C 1200 Ta = 25°C 1000 Ta = 85°C 800 600 400 200 0 0 100 200 300 R [kΩ] OSC MaxDuty vs ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 4. Examples of Transient Response Characteristics = 9 4.1 Powering ON (V OUT Remark The switch (SW) is inserted between the diode (SD) and VOUT output. Controlled externally to turn few ms later after the VIN voltage is applied. ( 1133 kHz mA, t OSC OUT − ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series = 9 4.2 Load fluctuations (V OUT = 1133 kHz 0.1 mA → 100 mA (1) f OSC OUT I OUT 100 mA 0 OUT [0.2 V/div] −20 −10 0 time [ms] ( 700 kHz 0.1 mA → 100 mA OSC OUT ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 4.3 Input voltage fluctuations (V = 1133 kHz 2.8 V → 3.8 V (1) f OSC IN 4.0 3 [V] 3.0 2.5 −20 −10 0 time [ms] ( 700 kHz 2.8 V → 3.8 V OSC IN 4.0 3 [V] 3.0 2.5 −20 −10 0 time [ms] = 286 kHz 2.8 V → 3.8 V ...
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... Gate to source voltage GS *10 Drain current D Caution The values shown in the characteristics column of Table 6 above are based on the materials provided by each manufacturer. However, consider the characteristics of the original materials when using the above products. 28 Table 6 Properties of External Parts Manufacture 10 µ H, DCR TDK Corporation Height = 1 ...
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... OSC vs. η (a) I OUT 100 0.01 0 OUT ) vs. efficiency ( η ) characteristics and (b) output current (I OUT = 620 Ω ) FB2 = 120 k Ω 180 k Ω ) OSC Duty ( 5 100 1000 [mA] = 200 k Ω 300 k Ω ) OSC Duty ( ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series 9 8.2 k Ω OUT FB1 = 1133 kHz, MaxDuty = 73% (R (1) f OSC vs. η (a) I OUT 100 0.01 0 OUT = 700 kHz, MaxDuty = 73% (R (2) f OSC vs. η ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 6 5.1 k Ω OUT FB1 = 1133 kHz, MaxDuty = 73% (R (1) f OSC vs. η (a) I OUT 100 0.01 0 [mA] OUT = 700 kHz, MaxDuty = 73% (R (2) f OSC vs. η ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series 3. Reference data (2) The data of output current ( 7.5 k Ω OUT FB1 = 1133 kHz, MaxDuty = 73 % (1) f OSC = 120 k Ω 180 k Ω OSC Duty 100 5 ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.2.3 _00 = 6 5.1 k Ω OUT FB1 = 1133 kHz, MaxDuty = 73% (1) f OSC (R = 120 k Ω 180 k Ω ) OSC Duty 100 2 3 0.01 0 [mA] ...
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... STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER S-8333 Series Marking Specification (1) SNT-8A SNT-8A Top view 1 4 Product name vs. Product code Product name S-8333AAAA-I8T1G S-8333AAAB-I8T1G S-8333AAAC-I8T1G S-8333AABA-I8T1G S-8333AABB-I8T1G S-8333AABC-I8T1G S-8333AACA-I8T1G S-8333AACB-I8T1G S-8333AACC-I8T1G S-8333AADA-I8T1G S-8333AADB-I8T1G S-8333AADC-I8T1G S-8333AAEA-I8T1G S-8333AAEB-I8T1G S-8333AAEC-I8T1G ...
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... TSSOP Top view 1 (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) 4 Product name vs. Function code Product name S-8333AAAA-T8T1G S-8333AAAB-T8T1G S-8333AAAC-T8T1G S-8333AABA-T8T1G S-8333AABB-T8T1G S-8333AABC-T8T1G S-8333AACA-T8T1G S-8333AACB-T8T1G S-8333AACC-T8T1G S-8333AADA-T8T1G S-8333AADB-T8T1G S-8333AADC-T8T1G S-8333AAEA-T8T1G S-8333AAEB-T8T1G S-8333AAEC-T8T1G S-8333AAFA-T8T1G S-8333AAFB-T8T1G S-8333AAFC-T8T1G S-8333AAGA-T8T1G S-8333AAGB-T8T1G S-8333AAGC-T8T1G S-8333AAHA-T8T1G S-8333AAHB-T8T1G ...
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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 ...