ST2S06B STMicroelectronics, ST2S06B Datasheet

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ST2S06B

Manufacturer Part Number
ST2S06B
Description
SYNCHRONOUS RETTIFICATION 0.5 A, 1.5 MHZ STEP-DOWN SWITCHING REGULATOR
Manufacturer
STMicroelectronics
Datasheet

Specifications of ST2S06B

Typical Efficiency
> 90%
Non-switching Quiescent Current
max 1 mA over temperature range

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Features
Description
The ST2S06 is a dual step-down DC-DC
converter optimized for powering low-voltage
digital cores in ODD applications and, generally,
to replace the high current linear solution when
Table 1.
July 2009
Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz
Step-down current mode PWM (1.5 MHz)
DC-DC converter
Fixed or adjustable output voltage from 0.8 V
2% DC output voltage tolerance
Synchronous rectification
Reset function for A version
Inhibit function for B version
Internal soft start for start-up current limitation
and power ON delay of 50-100 µs
Typical efficiency: > 90%
0.5 A output current capability
Non-switching quiescent current: max 1 mA
over temperature range
R
Uses tiny capacitors and inductors
Available in QFN12L (4x4 mm)
DS(ON)
ST2S06A33PQR
ST2S06BPQR
150 mΩ (typ.)
Order code
Device summary
adjustable step-down switching regulator
Doc ID 13866 Rev 4
QFN12L (4x4 mm)
QFN12L (4x4 mm)
Package
the power dissipation may cause a high heating of
the application environment. It provides up to 0.5
A over an input voltage range of 2.5 V to 5.5 V.
A high switching frequency of 1.5 MHz allows the
use of tiny surface-mount components as well as
a resistor divider to set the output voltage value.
Only an inductor and two capacitors are required.
A low output ripple is guaranteed by the current
mode PWM topology and the utilization of low
ESR SMD ceramic capacitors. The device is
thermally protected and current limited to prevent
damage due to accidental short circuit. The
ST2S06 series is available in the QFN12L (4x4
mm) package.
QFN12L (4x4 mm)
ST2S06A33
Tape and reel
Tape and reel
Packaging
ST2S06B
www.st.com
1/18
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ST2S06B Summary of contents

Page 1

... ESR SMD ceramic capacitors. The device is thermally protected and current limited to prevent damage due to accidental short circuit. The ST2S06 series is available in the QFN12L (4x4 mm) package. Package QFN12L (4x4 mm) QFN12L (4x4 mm) Doc ID 13866 Rev 4 ST2S06A33 ST2S06B Packaging Tape and reel Tape and reel 1/18 www.st.com 18 ...

Page 2

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

Page 3

... RESET_OUT * RESET_OUT * Delay Delay HV HV Trimming Trimming FB1 FB1 FB2 FB2 Ref Ref Soft Start Soft Start GND GND * ST2S06A/D ** ST2S06B VI_A VI_A Ref Ref CONTROL CONTROL LOGIC LOGIC INH** INH** Doc ID 13866 Rev 4 VI_SW VI_SW SW SW VI_SW VI_SW SW2 SW2 ...

Page 4

... Pin configuration Figure 2. Pin connections (top view) Table 2. Pin description Pin n° ST2S06A ST2S06B FB2 3 GND2 4 SW2 5 VIN_SW 6 SW1 7 GND1 8 FB1/OUT1 9 Reset_out VIN_A 12 GND_A 4/18 HV Programing pin. It must be floating or connected to GND. FB2 Feedback voltage GND2 Power ground SW2 Switching pin ...

Page 5

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 /V Feedback voltage/output voltage FB1 ...

Page 6

Electrical characteristics IN_SW IN_A µ 125 °C unless otherwise specified. Typical values are referred to 25 °C. J Table 6. Electrical characteristics for ST2S06A33 Symbol Parameter OUT ...

Page 7

... IN_SW IN_A T = -30 to 125 °C unless otherwise specified. Typical values are referred to 25 °C. J Table 7. Electrical characteristics for ST2S06B Symbol Parameter FB Feedback voltage 1 pin bias current FB1 Quiescent current Q I Output current O1,2 I Minimum output current MIN V Inhibit threshold ...

Page 8

... V =3.2V, V =0.7V =0. FB1 FB1 FB2 FB2 1.8 1.8 1.7 1.7 1.6 1.6 1.5 1.5 1.4 1.4 1.3 1.3 1.2 1.2 1.1 1.1 -50 -50 -25 - Temperature [°C] Temperature [°C] 8/18 Figure 4. Feedback voltage 2 vs. temperature (ST2S06B) 0.82 0.82 0. =5V, V =5V 0.81 0.81 0.81 0.8 0.8 0.8 0.79 0.79 0.79 0.78 0.78 0. 100 100 125 125 -50 -50 -50 -25 -25 -25 Figure 6. Efficiency vs. output current 2 ...

Page 9

... Figure 9. Switching frequency vs. temperature (ST2S06B) 1.9 1.9 1.8 1.8 1.7 1.7 1.6 1.6 1.5 1.5 1.4 1.4 1.3 1.3 1.2 1.2 1.1 1.1 -50 -50 -25 - Temperature [°C] Temperature [°C] Figure 11. Switching current limitation vs. input voltage (ST2S06A from 2.5V to 5.5V, Output2 Maximum load Current from 2.5V to 5.5V, Output2 Maximum load Current I I 1.8 1.8 1.6 1.6 1.4 1.4 1.2 1 2.5 2 3.5 3 [V] [ Figure 13. NMOS switch on resistance vs. ...

Page 10

... V = from Figure 20. Inhibit transient (ST2S06B) V INH from 0V to 2V, V INH Doc ID 13866 Rev 4 Rising Rising Falling Falling 100 100 T [C°] T [C° =500mA, Output Voltage=3 ...

Page 11

... Typical application Figure 21. Application circuit for ST2S06A VIN_A VIN_A VIN_SW VIN_SW NC NC Reset_Out Reset_Out GND1 GND1 C1 C1 4.7µF 4.7µF Figure 22. Application circuit for ST2S06B VIN_A VIN_A VIN_SW VIN_SW INH INH NC NC GND1 GND1 C1 C1 4.7µF 4.7µ ...

Page 12

Application information The ST2S06 represents a series of dual adjustable current mode PWM step-down DC-DC converters with an internal 0.5 A power switch, packaged in a QFN12L (4x4 mm complete 0.5 A switching regulator with internal ...

Page 13

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. ® ...

Page 14

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 2.25 4.00 4.10 ...

Page 15

Tape & reel QFNxx/DFNxx (4x4) mechanical data mm. Dim. Min. Typ 12 4.35 Bo 4. Max. Min. 330 13.2 0.504 0.795 101 3.898 14 Doc ID ...

Page 16

Figure 24. QFN12L (4x4 mm) footprint recommended data 16/18 Doc ID 13866 Rev 4 ...

Page 17

Revision history Table 8. Document revision history Date Revision 3-Sep-2007 1 21-Jan-2008 2 18-Mar-2008 3 28-Jul-2009 4 Changes Initial release. Added root part number ST2S06D33. Modified: Table 2 on page 4 . Modified: Table 1 on page 1 . ...

Page 18

... 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 any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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