SC192 Semtech Corporation, SC192 Datasheet
SC192
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SC192 Summary of contents
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... The SC192 is designed for single-cell Li-Ion battery applications, but also performs well in fixed 3. input circuits. The SC192 has a flexible clocking scheme. It can be synchronized to an external oscillator, fixed to the inter- nal oscillator, or allowed to modulate the frequency dur- ing light loads (PSAVE) for maximum battery life, by the method called pulse frequency modulation (PFM) ...
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... www.semtech.com SC192 ° ° C ° ...
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... www.semtech.com SC192 μ μ μ A μ ...
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... www.semtech.com SC192 ...
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... POWER MANAGEMENT Block Diagram BP ILIM and slope SYNC/ generation ADJ EN © 2007 Semtech Corp. - Plimit amp + Control logic - PW M comp + - Error amp + 750mV SC192 VIN + Current amp - Nlimit comp - www.semtech.com ...
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... POWER MANAGEMENT Description Description The SC192 step-down, pulse-width-modulated (PWM), DC-DC converter has an adjustable output range from 0.75V to the input voltage. The device has an internal synchronous rectifier and does not require a schottky diode on the LX pin. At moderate to heavy loads, the converter operates in the PWM mode with a fixed frequency of 750kHz. At light ...
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... TP8 ILIM TP4 VIN PGND 10uH 3 8 GND COMP SY NC 47pF 5 6 ADJ ILIM SC192 R3 100k 7 SC192 TP7 100k SW1 DIP TP5 VOUT R1 442k TP6 309k 0.1uF 22uF SYNC R4 100k www.semtech.com 1. ...
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... POWER MANAGEMENT Evaluation Board Gerber Plots TOP COPPER TOP SILKSCREEN © 2007 Semtech Corp. BOTTOM COPPER BOTTOM SILKSCREEN 8 SC192 PRELIMINARY www.semtech.com ...
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... Applications Information Selecting Components When selecting components for the an SC192 application the main factors are typically performance, size and cost. For higher performance the designer will select higher values of input and output capacitors to reduce ripple current and voltage. However, for an application that can tolerate higher ripple, less expensive and smaller compo- nents can be utilized. The schematics below show two possibilities. The first shows the use of 10μ ...
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... PWM, Cout = 20uF, Lout = 10uH PWM, Cout = 10uF, Lout = 10uH 10 SC192 PRELIMINARY ...
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... The most conservative approach would be to select an inductor with a saturation current slightly above the maximum current capability of the SC192 which is 1.56A peak current for ILIM = Vin or 780mA for ILIM = GND. A more accurate design of the inductor would be to rate ...
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... Ouput Current (mA) Efficiency at Vin = 200 400 600 Load Current (mA) Efficiency at Vin = 3. 200 400 600 Load Current (mA) Line Regulation At Iout = 300mA 2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8 Input Voltage (Volts) www.semtech.com SC192 2.5V 600 1.8V ...
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... Vin = 2.7 V 750 Vin = 3.6V 745 Vin = 5.5V 740 735 730 725 720 715 710 80 100 120 140 2 Vin = 3.6V 85 125 SC192 SC192 Load Regulation Limits 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 Load Reg Max Load Reg Typ 0.1 Load Reg Min 0.0 0 0.2 0.4 0.6 0.8 Peak Inductor Current (Amps) Oscillator Frequency vs V Over Temperature IN 2 ...
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... Top Marking 192 yyww yy = two-digit year of manufacture ww = two-digit week of manufacture © 2007 Semtech Corp SEATING PLANE bxN bbb SC192 PRELIMINARY DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX - - A .031 .039 0.80 1. .000 .002 0.00 ...
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... Contact Information © 2007 Semtech Corp. DIMENSIONS DIM INCHES (.112 .075 H .055 .087 P .020 X .012 Y Y .037 Z .150 Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 Visit us at: www.semtech.com 15 SC192 MILLIMETERS (2.85) 1.90 1.40 2.20 0.50 0.30 0.95 3.80 www.semtech.com ...