LM2636MTC National Semiconductor, LM2636MTC Datasheet
LM2636MTC
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LM2636MTC Summary of contents
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... Applications n Motherboard power supply/VRM for Cyrix Gxm, Cyrix Gxi, Cyrix MII, Pentium processors 1.3V–3.5V high current power supplies 10083403 See NS Package Number MTC20 DS100834 March 2005 ™ II, Pentium Pro, 6x86 and K6 TOP VIEW 10083403 Plastic TSSOP-20 Order Number LM2636MTC www.national.com ...
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Typical Application Pin Descriptions LSGATE (Pin 1): Gate drive for the low-side N-channel MOSFET. This signal is interlocked with HSGATE (Pin 20) to avoid a shoot-through problem. BOOTV (Pin 2): Power supply for high-side N-channel MOSFET gate drive. The voltage ...
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Pin Descriptions (Continued) V ID4 TABLE 1. VID ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (All voltages are referenced to the PGND and SGND pins BOOTV Junction Temperature DC Power Dissipation (Note 2) Storage Temperature Electrical Characteristics unless otherwise indicated under the Conditions column. Typicals and limits appearing in plain type apply for T ...
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Electrical Characteristics unless otherwise indicated under the Conditions column. Typicals and limits appearing in plain type apply for +25˚C. Limits appearing in boldface type apply over 0˚C to +70˚C. J Symbol Parameter V ...
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Electrical Characteristics The junction-to-ambient thermal resistance, θ JA Note 3: All pins are rated for 2 kV, except for the I Block Diagram www.national.com (Continued) , for LM2636 in the M20B package is 88˚C/W, and 120˚C/W for the MTC20 package. ...
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Test Circuit Applications Information OVERVIEW The LM2636 is a high speed synchronous PWM buck regu- lator controller designed for VRM vendors or motherboard manufacturers who need to build on-board power supplies for Cyrix MII, Pentium II or Deschutes microprocessors. It ...
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Applications Information fully turned on. The voltage can be either supplied from a separate source other than the input voltage or can be generated locally by utilizing a charge pump structure typical desktop microprocessor application ...
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Applications Information turned on. Whenever an over current condition is detected, the high side switch is immediately turned off and the low side switch turned on, until the next switching cycle comes. The delay of 300 circumvent ...
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Applications Information The control-to-output transfer function is The ESR zero frequency is: The power stage double pole frequency is: The corresponding Bode plots are shown in Figure 5. FIGURE 5. Control-to-Output Bode Plots Since the ESR zero frequency is so ...
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Applications Information driving capability of the error amplifier is limited to around 3 mA good idea to have a high impedance path from the output of the error amplifier to the output of the converter. From the ...
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Applications Information INDUCTOR SELECTION The size of the output is determined by a number of param- eters. Basically the larger the inductor, the smaller the output ripple voltage, but the slower the converter’s response speed during a load transient. On ...
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Applications Information connected between the FB pin and ground to increase the no load output voltage to close to the upper limit of the window. FIGURE 8. Dynamic Voltage Positioning by Using A Stand-Alone Resistor A possible drawback of the ...
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... Physical Dimensions unless otherwise noted www.national.com inches (millimeters) 20-Lead Plastic SO Package Order Number LM2636M NS Package Number M20B 20-Lead Plastic TSSOP (MTC) Order Number LM2636MTC NS Package Number MTC20 14 ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...