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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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SPSB100 Datenblatt(PDF) 10 Page - STMicroelectronics |
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SPSB100 Datenblatt(HTML) 10 Page - STMicroelectronics |
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10 / 213 page  All the parameters are guaranteed in the temperature range -40 to 150 °C (unless otherwise specified); the device is still operative and functional up to 185 °C. The parameters limits at higher temperatures than 150 °C may change with respect to what is specified as per the standard temperature range. The device functionality over 150 °C is guaranteed by characterization. The SPSB100 embeds a multitude of junctions housed in a relatively small piece of silicon. The devices contain, among all the described features, two voltage regulators (one of which can work as a voltage tracker) and three BUCK converters with internal power stages and one high side driver. For this reason, using the thermal impedance of a single junction (that is, voltage regulator or major power dissipation contributor) does not allow to predict thermal behavior of the whole device and therefore it is not possible to assess if a device is thermally suitable for a given activation profile and loads characteristics. Thermal information is provided as temperature reading by different clusters placed close to the most dissipative junctions. Some representative and realistic case thermal profiles are described below in a 4 layers board. Figure 3. VFQFN56+4L printed circuit board 4 layers - Top layer The following describes 2 typical application scenarios related to system configuration 1 and differentiated based on the BUCK1, 2 selected frequencies: Vbat = 16 V, Rthja = 19 °C/W, Tjmax = 170 °C Case A • LDO1 (5 V): charged with 100 mA (DC activation) • LDO2 (5 V): charged with 5 mA (DC activation) • OUT_HS: Iload = 20 mA (DC activation) • BUCK1 (3.3 V): charged with 1 A (DC activation) at 400 kHz • BUCK2 (5.0 V): charged with 1 A (DC activation) at 400 kHz • BUCK3 (0.98 V): charged with 2 A (DC activation) at 2.4 MHz Case B • LDO1 (5 V): charged with 100 mA (DC activation) • LDO2 (5 V): charged with 5 mA (DC activation) • OUT_HS: Iload = 20 mA (DC activation) • BUCK1 (3.3 V): charged with 1 A (DC activation) at 2.4 MHz SPSB100 Maximum ratings DS14640 - Rev 2 page 10/213 |
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