st1s06 STMicroelectronics, st1s06 Datasheet

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st1s06

Manufacturer Part Number
st1s06
Description
Synchronous Rectification With Inhibit, 1.5a, 1.5 Mhz Fixed Or Adjustable, Step-down Switching Regulator In Dfn6 3x3
Manufacturer
STMicroelectronics
Datasheet

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Features
Description
The ST1S06 is a step down DC-DC converter
optimized for powering low-voltage digital core in
HDD applications and, generally, to replace the
high current linear solution when the power
dissipation may cause an high heating of the
application environment. It provides up to 1.5 A
over an input voltage range of 2.7 V to 6 V. An high
switching frequency (1.5 MHz) allows the use of
tiny surface-mount components: as well as the
resistor divider to set the output voltage value,
only an inductor and two capacitors are required.
Besides, a low output ripple is guaranteed by the
Table 1.
March 2008
Step-down current mode PWM (1.5 MHz) DC-
DC converter
2% DC output voltage tolerance
Synchronous rectification
Inhibit function
Internal soft start
Typical efficiency: > 90 %
1.5 A Output current capability
Not switching quiescent current: max 1.5 mA
over temperature range
R
Uses tiny capacitors and inductors
Operative junction temp. -30 °C to 125 °C
Available in DFN6D 3x3 exposed pad
DS
ON typ150 m
Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or
Part numbers
ST1S06XX12
ST1S06XX33
Device summary
ST1S06A
ST1S06
Ω
adjustable, step-down switching regulator
ST1S06PU12R
ST1S06PU33R
ST1S06APUR
Order codes
ST1S06PUR
Rev 6
current mode PWM topology and by the use of low
ESR SMD ceramic capacitors. The device is
thermal protected and current limited to prevent
damages due to accidental short circuit. The
ST1S06 is available in DFN6D 3x3 package.
DFN6D (3x3 mm)
DFN6D (3x3 mm)
DFN6D (3x3 mm)
DFN6D (3x3 mm)
DFN6D (3x3 mm)
Package
ST1S06xx
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st1s06 Summary of contents

Page 1

... Operative junction temp. -30 °C to 125 °C ■ Available in DFN6D 3x3 exposed pad Description The ST1S06 is a step down DC-DC converter optimized for powering low-voltage digital core in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause an high heating of the application environment ...

Page 2

... Contents Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7 Application notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 ST1S06xx ...

Page 3

... ST1S06xx 1 Diagram Figure 1. Schematic diagram Diagram 3/20 ...

Page 4

... O 2 GND System ground 3 SW Switching pin 4 V Power supply for the mosfet switch IN_SW 5 V Power supply for analogic circuit IN_A 6 V Inhibit pin to turn off the device INH Exposed pad to be connected to GND 4/20 ST1S06A for Fixed version O Note ST1S06xx ...

Page 5

... ST1S06xx 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 Max. voltage of output pin Voltage V /V Feedback voltage Output voltage (for Max junction temperature J T Storage temperature range ...

Page 6

... Electrical characteristics 4 Electrical characteristics Table 5. Electrical characteristics for ST1S06 ( IN_SW IN_A INH to 125 °C (unless otherwise specified. Typical values are referred to T Symbol Parameter FB Feedback voltage I V pin bias current Minimum input voltage I I Quiescent current Q I Output current ...

Page 7

... ST1S06xx Table 6. Electrical characteristics for ST1S06PM12 ( IN_SW IN_A INH to 125 °C unless otherwise specified. Typical values are referred to T Symbol Parameter OUT Output feedback pin I I pin bias current Minimum input voltage I I Quiescent current Q I Output current O V Inhibit threshold ...

Page 8

... Electrical characteristics Table 7. Electrical characteristics for ST1S06PM33 ( IN_SW IN_A INH to 125 °C unless otherwise specified. Typical values are referred to T Symbol Parameter OUT Output feedback pin I I pin bias current Minimum input voltage I I Quiescent current Q I Output current ...

Page 9

... ST1S06xx 5 Typical performance characteristics ( 4.7 µF, C IN_SW IN_A INH I values are referred to 25 °C) Figure 3. Efficiency vs output current Figure 5. Efficiency vs output current Figure 7. Efficiency vs output current Typical performance characteristics = 22 µ 3.3 µH, unless otherwise specified. Typical O Figure 4. Efficiency vs output current Figure 6 ...

Page 10

... Typical performance characteristics Figure 9. Voltage feedback vs temperature Figure 11. Feedback pin bias current vs temperature Figure 13. Quiescent current vs temperature 10/20 Figure 10. Input voltage vs output voltage Figure 12. Quiescent current vs temperature Figure 14. Inhibit voltage vs input voltage ST1S06xx ...

Page 11

... ST1S06xx Figure 15. Inhibit voltage vs temperature Figure 17. Line regulation vs temperature Figure 19. PWM switching frequency vs temperature Typical performance characteristics Figure 16. Inhibit voltage vs temperature Figure 18. Load regulation vs temperature Figure 20. NMOS switch on resistance vs temperature 11/20 ...

Page 12

... Typical performance characteristics Figure 21. PMOS switch on resistance vs temperature Figure 23. Inhibit transient 10mA I INH O 12/20 Figure 22. Inhibit transient 1.5A I INH O ST1S06xx ...

Page 13

... ST1S06xx 6 Typical application Figure 24. Application circuit Typical application 13/20 ...

Page 14

... Finally, the ST1S06 has been designed to work properly with X5R or X7R SMD ceramic capacitors both at the input and at the output. ...

Page 15

... ST1S06xx 8 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK trademark ...

Page 16

... DFN6D (3x3 mm) mechanical data Dim. Min 0.23 D 2.90 D2 2.23 E 2. 0.30 16/20 mm. Typ. Max. Min. 1.00 0.031 0.02 0.05 0 0.20 0.45 0.009 3.00 3.10 0.114 2.50 0.088 3.00 3.10 0.114 1.75 0.059 0.95 0.40 0.50 0.012 ST1S06xx inch. Typ. Max. 0.039 0.001 0.002 0.008 0.018 0.118 0.122 0.098 0.118 0.122 0.069 0.037 0.016 0.020 7946637B ...

Page 17

... ST1S06xx 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 data inch. Typ. Max. 12.992 0.519 0.724 0.130 0.130 0.043 0.157 0.315 17/20 ...

Page 18

... Package mechanical data Figure 25. DFN6 (3x3 mm) footprint recommended data 18/20 ST1S06xx ...

Page 19

... ST1S06xx 9 Revision history Table 8. Document revision history Date Revision 08-May-2006 1 Initial release. 06-Jun-2006 2 Table 3 16-Oct-2006 3 Add new mechanical data DFN6D. 09-Nov-2006 4 Mechanical data information for DFN6 update. 03-Apr-2007 5 Tape and reel updated. 12-Mar-2008 6 Added: Changes updated. Table 1 on page 1. Revision history ...

Page 20

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