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ST2S06B Dataheets PDF



Part Number ST2S06B
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description (ST2S06xxx) Dual synchronous rectification
Datasheet ST2S06B DatasheetST2S06B Datasheet (PDF)

ST2S06A33 ST2S06B - ST2S06D33 Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator Features ■ Step-down current mode PWM (1.5 MHz) DC-DC converter from 0.8 V ■ Fixed or adjustable output voltage www.DataSheet4U.com ■ 2% DC output voltage tolerance ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Synchronous rectification Reset function for A and D versions Inhibit function for B version Internal soft start for start-up current limitation and power ON delay of 50-10.

  ST2S06B   ST2S06B


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ST2S06A33 ST2S06B - ST2S06D33 Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator Features ■ Step-down current mode PWM (1.5 MHz) DC-DC converter from 0.8 V ■ Fixed or adjustable output voltage www.DataSheet4U.com ■ 2% DC output voltage tolerance ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Synchronous rectification Reset function for A and D versions 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 RDS(ON) 150 mΩ (typ.) Uses tiny capacitors and inductors Available in QFN12L (4x4 mm) 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) 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. Device summary Order code ST2S06APQR(1) ST2S06A33PQR ST2S06D33PQR ST2S06BPQR Package QFN12L (4x4 mm) QFN12L (4x4 mm) QFN12L (4x4 mm) QFN12L (4x4 mm) Packaging Tape and reel Tape and reel Tape and reel Tape and reel 1. Available on request. March 2008 Rev 3 1/21 www.st.com 21 Contents ST2S06A33 - ST2S06B - ST2S06D33 Contents 1 2 3 4 www.DataSheet4U.com Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5 6 7 8 9 2/21 ST2S06A33 - ST2S06B - ST2S06D33 Diagram 1 Figure 1. Diagram Schematic diagram RESET_OUT * VI_A VI_SW Delay www.DataSheet4U.com Ref SW HV Trimming FB1 VI_SW FB2 CONTROL LOGIC SW2 Ref Soft Start GND INH** GND * ST2S06A/D ** ST2S06B 3/21 Pin configuration ST2S06A33 - ST2S06B - ST2S06D33 2 Figure 2. Pin configuration Pin connections (top view) www.DataSheet4U.com Table 2. Pin n° 1 2 3 4 5 6 7 8 9 10 11 12 Pin description ST2S06A/D HV FB2 GND2 SW2 VIN_SW SW1 GND1 FB1/OUT1 Reset_out NC VIN_A GND_A ST2S06B HV FB2 GND2 SW2 VIN_SW SW1 GND1 FB1 NC INH VIN_A GND_A Name and function Programing pin. It must be floating or connected to GND. Feedback voltage Power ground Switching pin Power input voltage pin Switching pin Power ground Feedback voltage / output voltage Reset out pin Inhibit pin Supply for analog circuit System ground 4/21 ST2S06A33 - ST2S06B - ST2S06D33 Maximum ratings 3 Table 3. Maximum ratings Absolute maximum ratings Parameter Positive power supply voltage Positive power supply voltage Inhibit voltage Max. voltage of output pin Feedback voltage/output voltage Output voltage (for VO > 1.6 V) Common mode input voltage Max junction temperature Storage temperature range Lead temperature (soldering) 10 sec. Value -0.3 to 7 -0.3 to 7 -0.3 to 7 -0.3 to 7 -0.3 to 2.5 -0.3 to 5 +1 to -1 150 -65 to +150 300 Unit V V V V V V mA °C °C °C Symbol VIN_SW VIN_A VINH SWITCH voltage VFB1,2/VO1 www.DataSheet4U.com VO1 Current into VFB pin TJ TSTG TLEAD Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Thermal data Parameter Thermal resistance junction-case Thermal resistance junction-ambient Value 10 60 Unit °C/W °C/W Table 4. Symbol RthJC RthJA Table 5. Symbol ESD ESD performance Parameter ESD protection voltage Test conditions HBM-DH11C Value 4 Unit kV 5/21 Electrical characteristics ST2S06A33 - ST2S06B - ST2S06D33 4 Table 6. Electrical characteristics Electrical characteristics for ST2S06A (VIN_SW = VIN_A = 5 V, VO1,2 = 1.2 V, C1 = 4.7 µF, C2 = C.


ST2S06D33 ST2S06B MAX16040


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