ST2S08BPQR STMicroelectronics, ST2S08BPQR Datasheet

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... PWM topology and the utilization of low ESR SMD ceramic capacitors. The device is thermally protected and current limited. The Table 1. Device summary Order code ST2S08BPQR November 2010 Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator = 1.2 V OUT ST2S08B is available in the QFN12L ( mm) package ...

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Contents Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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ST2S08B 1 Diagram Figure 1. Schematic diagram * Not available on the ST2S08B version. Doc ID 18290 Rev 1 Diagram 3/18 ...

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Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) Table 2. Pin description Pin n° Name FB2 3 GND2 4 SW2 5 VIN_SW 6 SW1 7 GND1 8 FB1 INH 11 VIN_A ...

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ST2S08B 3 Maximum ratings Table 3. Absolute maximum ratings Symbol V Positive power supply voltage IN_SW V Positive power supply voltage IN_A V Inhibit voltage INH SWITCH voltage Max. voltage of output pin V Feedback voltage/output voltage FB1,2 Current into ...

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Electrical characteristics 4 Electrical characteristics IN_SW IN_A T = -30 to 125 °C, unless otherwise specified. Typical values refer to 25 °C. J Table 6. Electrical characteristics Symbol Parameter FB Feedback voltage 1,2 ...

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ST2S08B 5 Typical application Figure 3. Application circuit V IN VIN_A VIN_SW INH NC GND1 C1 4.7 µF Note: R1, R2 and R3, R4 are calculated according to the following equations R2) ...

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Typical performance characteristics 6 Typical performance characteristics Figure 4. Feedback voltage vs. temperature 0.84 0. connected fb1 fb2 0.82 0.81 0.8 0.79 0.78 0.77 0.76 -50 - Temperature [°C] ...

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ST2S08B Figure 10. Switching current limitation vs. temperature 2.4 2.2 2 1.8 1.6 1.4 1 Output1 maximum load current IN 0.8 0.6 -50 - Temperature [°C] Figure 12. Inhibit transient INH V = ...

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General information 7 General information The ST2S08B is a dual adjustable current mode PWM step-down DC-DC converter complete 1.5 A switching regulator with internal compensation that eliminates the need for additional components. The constant frequency, current mode, ...

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ST2S08B 8 Application information 8.1 Introduction The following technical information is used for estimating typical external component characteristics using standard equations. Nevertheless strongly recommended to validate the suitability of external components to the application requirements by thoroughly testing ...

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Application information Equation PEAK O In addition to the inductance value, in order to avoid saturation, the maximum saturation current of the inductor must be higher than that of ...

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ST2S08B 9 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions, and product status are available at: www.st.com. ...

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Package mechanical data Dim. Min 0.25 D 3.90 D2 2.00 E 3. 0.45 14/18 QFN12L (4x4) mechanical data mm. Typ. Max. 0.90 1.00 0.02 0.05 0.20 0.30 0.35 4.00 4.10 2.15 ...

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ST2S08B Tape & reel QFNxx/DFNxx (4x4) mechanical data Dim. Min 12 mm. Typ. Max. Min. 330 13.2 0.504 0.795 101 3.898 14.4 4.35 4.35 1 Doc ...

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Package mechanical data Figure 13. QFN12L ( mm) footprint recommended data 16/18 Doc ID 18290 Rev 1 ST2S08B ...

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ST2S08B 10 Revision history Table 7. Document revision history Date Revision 30-Nov-2010 1 Initial release. Doc ID 18290 Rev 1 Revision history Changes 17/18 ...

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