SC1176CSW Semtech Corporation, SC1176CSW Datasheet
SC1176CSW
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SC1176CSW Summary of contents
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POWER MANAGEMENT Description The SC1176 is a versatile 2 phase, synchronous, volt- age mode PWM controller that may be used in two dis- tinct ways. First, the SC1176 is ideal for applications where point of use output power exceeds any ...
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POWER MANAGEMENT Typical Application Circuit 2 Channels with Current Sharing 2003 Semtech Corp. SC1176/SC1176A 2 www.semtech.com ...
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POWER MANAGEMENT Absolute Maximum Rating Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied ...
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POWER MANAGEMENT Electrical Characteristics (Cont.) Unless Specified 4.75 to 5.25V, GND = PGND = 0V ...
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POWER MANAGEMENT Pin Configuration Top View (SOIC-20 and TSSOP-20 Pin) Pin Descriptions EXPANDED PIN DESCRIPTION Pin 1: (VREF) Internal .9V reference Connected to the + input of the master channel error amplifier. Pin 2: (+IN) + Input of slave channel ...
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POWER MANAGEMENT Block Diagram NOTES (1) Block 1 (top) is the Master and Block 2 (bottom) is the Slave in current sharing configuration. (2) For independant operation there is no Master or Slave. Applications Information - Theory of Operation Main ...
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POWER MANAGEMENT Applications Information - Theory of Operation ing is not 1:1. The Master and Slave channels still have their own current limits, identical to the independent channel case. Power Good The controller provides a power good signal. This is ...
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POWER MANAGEMENT Typical Characteristics - 2 Channels with Current Sharing Figure 1: Figure 1: V Figure and I Figure 1: Figure 1: OUT IN(5V) IN(12V) Figure 2: V Figure 2: Figure 2: Figure 2: Figure 2: vs ...
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POWER MANAGEMENT Typical Characteristics - 2 Channels with Current Sharing (Cont.) Figure 3: Figure 3: Figure 3: Figure 3: V Figure and I OUT IN(5V) IN(12V) Figure 4: Figure 4: V Figure 4: Figure 4: Figure 4: ...
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POWER MANAGEMENT Typical Characteristics - 2 Channels with Current Sharing (Cont.) Figure 5: Efficiency data - current sharing mode. Figure 5: Figure 5: Figure 5: Figure 5: 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 ...
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POWER MANAGEMENT Evaluation Board Schematic - 2 Channel with Current Sharing 2003 Semtech Corp. SC1176/SC1176A 11 www.semtech.com ...
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POWER MANAGEMENT Evaluation Board Bill of Materials - 2 Channels with Current Sharing ...
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POWER MANAGEMENT Evaluation Board Gerber Plots - 2 Channels with Current Sharing 2003 Semtech Corp. SC1176/SC1176A Top Side Traces Bottom Side Traces 13 www.semtech.com ...
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POWER MANAGEMENT Typical Characteristics - 2 Independent Channels Output Current Input Voltage = 12V @ 5Amps. 2A/DIV. 2003 Semtech Corp. SC1176/SC1176A 14 www.semtech.com ...
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POWER MANAGEMENT Typical Characteristics - 2 Independent Channels (Cont.) Peak - Peak Output Ripple @ 5A Input Voltage = 12V. Output Voltage = 2.0V Phase Node 12V Input @ 5A Phase Node 12V Input @ 5A Phase Node 12V Input ...
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POWER MANAGEMENT Typical Characteristics - 2 Independent Channels (Cont.) Start-up Power On Start-up Power On Start-up Power On Start-up Power On Start-up Power On Chan Output Current. 2A/DIV. Chan Bias Voltage Power Off Power Off ...
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POWER MANAGEMENT Typical Characteristics - 2 Independent Channels Efficiency Test 100 The Independent Channels Evaluation Board is not intended for a specific application. The power components are not optimized for minimum cost and ...
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POWER MANAGEMENT Evaluation Board Schematic - 2 Independent Channels 2003 Semtech Corp. SC1176/SC1176A 18 www.semtech.com ...
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POWER MANAGEMENT Evaluation Board Bill of Materials - 2 Independent Channels ...
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POWER MANAGEMENT Evaluation Board Gerber Plots - 2 Independent Channels 2003 Semtech Corp. SC1176/SC1176A Top Side Traces Bottom Side Traces 20 www.semtech.com ...
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POWER MANAGEMENT Layout Guidelines Power and signal traces must be kept separated for noise considerations. Feedback, current sense traces and ana- log ground should not cross any traces or planes carrying high switching currents, such as the input loop or ...
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... POWER MANAGEMENT Outline Drawing - SO-20 Outline Drawing - TSSOP-20 Contact Information Phone: (805)498-2111 FAX (805)498-3804 2003 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 22 SC1176/SC1176A www.semtech.com ...