ST1S03PU STMICROELECTRONICS [STMicroelectronics], ST1S03PU Datasheet
ST1S03PU
Available stocks
Related parts for ST1S03PU
ST1S03PU Summary of contents
Page 1
... PWM topology and by the use of low E.S.R. SMD ceramic capacitors. The device is thermal protected and current limited to prevent damages due to accidental short circuit. The ST1S03 is available in DFN6. Packaging ST1S03PMR ST1S03PUR Rev. 5 ST1S03 DFN6 (3x3mm) Package DFN6 (3x3 mm) DFN6D (3x3 mm) 1/17 www ...
Page 2
Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 3
ST1S03 1 Diagram Figure 1. Schematic diagram Diagram 3/17 ...
Page 4
Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) Table 1. Pin description Pin N° Symbol GND IN_SW 5 V IN_A 6 N.C. 4/17 Name and function Voltage of Feedback ...
Page 5
ST1S03 3 Maximum ratings Table 2. Absolute maximum ratings Symbol V Positive Power Supply Voltage I_SW V Positive Power Supply Voltage I_SW SWITCH Voltage Max Voltage of output pin V Feedback Voltage FB I Common mode input voltage VFB T ...
Page 6
Electrical characteristics 4 Electrical characteristics Table 4. Electrical characteristics ( 125°C, unless otherwise specified. Typical values are referred to 25°C) J Symbol Parameter FB Feedback voltage PSRR Feedback PSRR I V Pin bias current FB FB ...
Page 7
ST1S03 5 Application notes The ST1S03 is an adjustable current mode PWM step-down DC/DC converter with internal 1.5A power switch, packaged in 6-lead DFN 3x3. It’s a complete 1.5A switching regulator with its internal compensation eliminating additional component. The constant ...
Page 8
Typical application 6 Typical application Figure 3. Application circuits 8/17 ST1S03 ...
Page 9
ST1S03 7 Typical performance characteristics (L1=3.3µ 4.7µ Figure 4. Load voltage feedback vs temp. Figure 6. Line output voltage regulation vs temperature Figure 8. Voltage feedback vs output current Figure 9. Typical performance characteristics = 22µF, ...
Page 10
Typical performance characteristics Figure 10. Quiescent current vs temperature Figure 12. Minimum operating voltage vs output voltage Figure 14. Efficiency vs output current 10/17 Figure 11. Quiescent current vs input voltage Figure 13. Efficiency vs temperature Figure 15. Switch V ...
Page 11
ST1S03 Figure 16. Switch RDS-ON vs temperature Figure 18. Load transient response V =5V, I =100mA to 780mA, C =4.7µ L=3.3µH, T =38µs, T =25° Figure 20. Start-Up transient ...
Page 12
Package mechanical data 8 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and ...
Page 13
ST1S03 DIM. MIN 0.33 D 2.90 D2 1.92 E 2. 0.20 DFN6 (3x3) MECHANICAL DATA mm. TYP MAX. 1.00 0.05 0.75 0.20 0.43 3.00 ...
Page 14
Package mechanical data DIM. MIN 0.23 D 2.90 D2 2.23 E 2. 0.30 14/17 DFN6D (3x3) MECHANICAL DATA mm. TYP MAX. 1.00 0.02 0.05 0.20 0.45 3.00 3.10 2.50 3.00 ...
Page 15
ST1S03 Tape & Reel QFNxx/DFNxx (3x3) MECHANICAL DATA DIM. MIN 12 mm. TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 18.4 3.3 3.3 1 Package mechanical ...
Page 16
Revision history 9 Revision history Table 5. Revision history Date Revision 11-Nov-2004 1 08-Feb-2005 2 03-Mar-2005 3 13-Jul-2005 4 29-Mar-2007 5 16/17 First Release. Maturity Change. Mistake on Figure changed 125 ==> 150°C on Table 3. J ...
Page 17
ST1S03 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at ...