sc1175 Semtech Corporation, sc1175 Datasheet
sc1175
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sc1175 Summary of contents
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... First, the SC1175 is ideal for applications where point of use output power exceeds any single in- put power budget. Alternatively, the SC1175 can be used as a dual switcher. The SC1175 features a temperature compensated voltage reference, over current protection with 50% fold-back and internal level-shifted, high-side drive circuitry ...
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... POWER MANAGEMENT Typical Application Circuit 2 Channels with Current Sharing 2004 Semtech Corp. 2 SC1175 www.semtech.com ...
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... SC1175 ± 25°C ...
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... SC1175 µ ...
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... Inhibits the chip if pulled down. Pin 19: Pin 19: Pin 19: Pin 19: (PWRGD) Pin 19: Power good signal. Open collector signal . Turns output voltage is outside the power good window. Pin 20: Pin 20: Pin 20: Pin 20: (GND) Pin 20: Analog GND. 5 SC1175 ...
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... Channel 1 has the positive input of the error amplifier internally connected to Vref. Channel 2 has both inputs of the error amplifier uncommitted and avail- able externally. This allows the SC1175 to operate in two distinct modes. a) Two independent channels with either common or different input voltages and different output voltages. ...
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... There is no need for an offset resistor in the indepen- dent channels mode, only the two sense resistors are used: Selection for the channel 1: (mohms) SENSE 72mV / I max ch 1 SENSE Selection for the channel 2: (mohms) SENSE 72mV / I max ch 2 SENSE 7 SC1175 1 . www.semtech.com ...
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... I OUT IN(5V) 2004 Semtech Corp. and I with V applied and 4A load. Soft start capacitor = 10nF. IN(12V) CC and I with V removed and 4A load. Soft start capacitor = 10nF. IN(12V SC1175 Ch1: V OUT Ch2: I (1A/Div) IN(5V) Ch4: I (1A/Div) IN(12V 4.004 Amps OUT Ch1: V OUT Ch2: I (1A/Div) ...
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... OUT IN(5V) 2004 Semtech Corp. and I with V applied and 12A load. Soft start capacitor = 10nF. IN(12V) CC and I with V removed and 12A load. Soft start capacitor = 10nF. IN(12V SC1175 Ch1: V OUT Ch2: I (2A/Div) IN(5V) Ch4: I (2A/Div) IN(12V Amps OUT Ch1: V OUT Ch2: I ...
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... The Current Sharing Evaluation Board is not intended for a specific application. The power components are not optimized for minimum cost and size. This evaluation board should be used to understand the operation of the SC1175. To design with SC1175 for specific current sharing applications,please refer to Application note AN00-3. 2004 Semtech Corp. ...
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... POWER MANAGEMENT Evaluation Board Schematic - 2 Channel with Current Sharing 2004 Semtech Corp. 11 SC1175 www.semtech.com ...
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... SC1175 ...
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... POWER MANAGEMENT Evaluation Board Gerber Plots - 2 Channels with Current Sharing 2004 Semtech Corp. Top Side Traces Bottom Side Traces 13 SC1175 www.semtech.com ...
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... POWER MANAGEMENT Typical Characteristics - 2 Independent Channels Figure 6: Figure 6: Figure 6: Figure 6: Figure 6: Figure 7 Figure 7 : Output Current : Output Current Figure 7 Figure 7 Figure 7: Output Current : Output Current : Output Current 2004 Semtech Corp. Input Voltage = 12V @ 5Amps. 2A/DIV. 14 SC1175 www.semtech.com ...
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... Figure 8: Peak - Peak Output Ripple @ 5A Figure 8: IInput Voltage = 12V. Output Voltage = 2.0V Figure 9: Phase Node 12V Input @ 5A Figure 9: Phase Node 12V Input @ 5A Figure 9: Phase Node 12V Input @ 5A Figure 9: Phase Node 12V Input @ 5A Figure 9: Phase Node 12V Input @ 5A (without snubber and RC network. 2004 Semtech Corp. 15 SC1175 www.semtech.com ...
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... Figure 10: Start-up Power On Figure 10: Start-up Power On Chan Output Current. 2A/DIV. Chan Bias Voltage Figure 11: Power Off Figure 11: Power Off Figure 11: Power Off Figure 11: Power Off Figure 11: Power Off Chan Output Current. 2A/DIV. Chan Bias Voltage 2004 Semtech Corp. 16 SC1175 www.semtech.com ...
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... The Independent Channels Evaluation Board is not intended for a specific application. The power components are not optimized for minimum cost and size. This evaluation board should be used to understand the operation of the SC1175. To design with the SC1175 for specific independent channels applications. Please refer to: Application note AN00-4. 2004 Semtech Corp. ...
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... POWER MANAGEMENT Evaluation Board Schematic - 2 Independent Channels 2004 Semtech Corp. 18 SC1175 www.semtech.com ...
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... SC1175 ...
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... POWER MANAGEMENT Evaluation Board Gerber Plots - 2 Independent Channels 2004 Semtech Corp. Top Side Traces Bottom Side Traces 20 SC1175 www.semtech.com ...
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... The IC must have a ceramic decoupling capacitor across its supply pins, mounted as close to the device as possible. The small ceramic, noise-filtering capaci- tors on the current sense lines should also be placed as close to the IC as possible. 2004 Semtech Corp. 21 SC1175 www.semtech.com ...
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... bxN bbb C A-B D GAGE PLANE 0.25 A SEE DETAIL SIDE VIEW AND - DETERMINED AT DATUM PLANE -H- DIM INCHES SC1175 MILLIMETERS MIN NOM MAX - - .047 1.20 - .006 0.05 0.15 - .042 0.80 1.05 - .012 0.19 0.30 - .007 0.09 0.20 .259 6.40 6.50 6.60 .177 4.30 4.40 4.50 6.40 BSC 0.65 BSC ...
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... POWER MANAGEMENT Outline Drawing - SO-20 Contact Information 2004 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 23 SC1175 www.semtech.com ...