Datasheet
Table Of Contents
- Table 1. Device summary
- 1 Application circuit
- 2 Pin configuration
- 3 Maximum ratings
- 4 Electrical characteristics
- 5 Application information
- 5.1 Description
- 5.2 External components selection
- 5.3 Output capacitor (VOUT > 2.5 V)
- 5.4 Output capacitor (0.8 V < VOUT < 2.5 V)
- 5.5 Output voltage selection
- 5.6 Inductor (VOUT > 2.5 V)
- 5.7 Inductor (0.8 V < VOUT < 2.5 V)
- 5.8 Function operation
- 6 Layout considerations
- 7 Diagram
- 8 Typical performance characteristics
- Figure 9. Voltage feedback vs. temperature
- Figure 10. Oscillator frequency vs. temperature
- Figure 11. Max duty cycle vs. temperature
- Figure 12. Inhibit threshold vs. temperature
- Figure 13. Reference line regulation vs. temperature
- Figure 14. Reference load regulation vs. temperature
- Figure 15. ON mode quiescent current vs. temperature
- Figure 16. Shutdown mode quiescent current vs. temperature
- Figure 17. PMOS ON resistance vs. temperature
- Figure 18. NMOS ON resistance vs. temperature
- Figure 19. Efficiency vs. temperature
- Figure 20. Efficiency vs. output current@Vout = 5 V
- Figure 21. Efficiency vs. output current@Vout = 3.3 V
- Figure 22. Efficiency vs. output current@Vout = 12 V
- 9 Package mechanical data
- Table 6. Power SO-8 (exposed pad) mechanical data
- Figure 23. Power SO-8 (exposed pad) dimensions
- Figure 24. Power SO-8 (exposed pad) recommended footprint
- Table 7. Power SO-8 (exposed pad) tape and reel mechanical data
- Figure 25. Power SO-8 (exposed pad) tape and reel dimensions
- Table 8. DFN8 (4X4) mechanical data
- Figure 26. DFN8 (4x4) dimensions
- Table 9. DFN8 (4x4)tape and reel mechanical data
- Figure 27. DFN8 (4x4)tape and reel dimensions
- 10 Revision history

Pin configuration ST1S10
6/29 Doc ID 13844 Rev 5
2 Pin configuration
Figure 2. Pin connections (top view for PowerSO-8, bottom view for DFN8)
PowerSO-8
DFN8 (4x4)
Table 2. Pin description
Pin n° Symbol Name and function
1V
IN_A
Analog input supply voltage to be tied to V
IN
supply source
2 INH (EN) Inhibit pin active low. Connect to V
IN_A
if not used
3V
FB
Feedback voltage for connection to external voltage divider to set the V
OUT
from 0.8V up to 0.85*V
IN_SW
. (see output voltage selection paragraph 5.5)
4 AGND Analog ground
5 SYNC
Synchronization and frequency select. Connect SYNC to GND for 900 kHz
operation, or to an external clock from 400 kHz to 1.2 MHz. (see Sync
operation paragraph 5.8.1)
6V
IN_SW
Power input supply voltage to be tied to V
IN
power supply source
7 SW Switching node to be connected to the inductor
8 PGND Power ground
epad epad Exposed pad to be connected to ground