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LM337T Scheda tecnica(PDF) 4 Page - National Semiconductor (TI) |
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LM337T Scheda tecnica(HTML) 4 Page - National Semiconductor (TI) |
4 / 12 page Thermal Regulation (Continued) In Figure 1, a typical LM137’s output drifts only 3 mV (or 0.03% of V OUT = −10V) when a 10W pulse is applied for 10 ms. This performance is thus well inside the specification limit of 0.02%/W x 10W = 0.2% max. When the 10W pulse is ended, the thermal regulation again showsa3mV step at the LM137 chip cools off. Note that the load regulation error of about 8 mV (0.08%) is additional to the thermal regulation error. In Figure 2, when the 10W pulse is applied for 100 ms, the output drifts only slightly beyond the drift in the first 10 ms, and the thermal error stays well within 0.1% (10 mV). Connection Diagrams TO-3 Metal Can Package TO-39 Metal Can Package 00906705 Case is Input Bottom View Order Number LM137K/883 LM137KPQML and LM137KPQMLV(Note 5) See NS Package Number K02C Order Number LM337K STEEL See NS Package Number K02A 00906706 Case Is Input Note 5: See STD Mil DWG 5962P99517 for Radiation Tolerant Devices Bottom View Order Number LM137H, LM137H/883 or LM337H LM137HPQML and LM137HPQMLV(Note 5) See NS Package Number H03A 00906704 LM137, VOUT = −10V VIN −VOUT = −40V IL =0A → 0.25A → 0A Horizontal sensitivity, 20 ms/div FIGURE 2. www.national.com 4 |
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