LM27222M National Semiconductor, LM27222M Datasheet
LM27222M
Specifications of LM27222M
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LM27222M Summary of contents
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... Vin and Vcc are stable and the switching controller starts operating. To support low power states in notebook Typical Application © 2004 National Semiconductor Corporation systems, LM27222 draws only 5µA from the 5V rail when the IN and LEN inputs are low or floating. ...
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... Connection Diagram Ordering Information Order Number Size NSC Drawing # LM27222M SO-8 LM27222MX LM27222SD LLP-8 LM27222SDX Pin Description Pin # Pin Name 1 SW High-side driver return. Should be connected to the common node of high and low-side MOSFETs High-side gate drive output. Should be connected to the high-side MOSFET gate. Pulled down internally to SW with a 10K resistor to prevent spurious turn on of the high-side MOSFET when the driver is off ...
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Block Diagram 20117903 3 www.national.com ...
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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 GND GND GND (Note 2) LEN to GND IN to GND LG to GND HG to GND Electrical Characteristics VCC = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T +25˚ ...
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Electrical Characteristics VCC = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T +25˚C. Limits appearing in boldface type apply over the entire operating temperature range (-40˚C ≤ ...
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Typical Waveforms FIGURE 2. IN Rising The typical waveforms are from a circuit similar to Figure 1 with: Q1 Si7390DP Q2 Si7356DP L1: 0.4 µ 12V IN www.national.com 20117907 FIGURE 3. IN Falling 20117909 ...
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Application Information MINIMUM PULSE WIDTH As the input pulse width to the IN pin is decreased, the pulse width of the high-side gate drive (HG-SW) also decreases. However, for input pulse widths 60ns and smaller, the HG-SW remains constant at ...
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Application Information used, and secondly, high-side switch resistance becomes a larger loss factor than the switching losses. Of course with a lower input voltage, the input capacitor voltage rating can be reduced and the inductor value can be reduced as ...
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... Physical Dimensions unless otherwise noted www.national.com inches (millimeters) 8-Lead Small Outline Package Order Number: LM27222M, LM27222MX NS Package Number M08A 8-Lead LLP Package Order Number: LM27222SD, LM27222SDX NS Package Number SDC08A 10 ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials 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. ...