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LM2633 Datasheet(PDF) 30 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM2633
Description  Advanced Two-Phase Synchronous Triple Regulator Controller for Notebook CPUs
PDF  40 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2633 Datasheet(HTML) 30 Page - National Semiconductor (TI)

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Input Capacitor Selection (Continued)
Control Loop Design
Samll Signal Model
The buck regulator small signal model is shown in
Figure 7.
The model is obtained by applying the current-controlled
PWM switch derived by Vorperian and by omitting portions
that are irrelevant in a buck topology.
In the model, the DC output conductance of the PWM switch
is:
20000884
FIGURE 6. Input Ripple RMS Current Ratio: 2-phase vs. In-phase
20000838
FIGURE 7. Small Signal Model of Buck Regulators
www.national.com
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