STBB1-AXX STMicroelectronics, STBB1-AXX Datasheet
STBB1-AXX
Specifications of STBB1-AXX
Related parts for STBB1-AXX
STBB1-AXX Summary of contents
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... PWM mode thus taking benefit either of lower power consumption or best dynamic performance. The device includes also soft-start control, thermal shutdown and current limit. The STBB1-A is packaged in DFN10 ( mm). Marking BB1-A Doc ID 022197 Rev 2 STBB1-AXX N-channel and P-channel Output voltage ADJ 1/22 www.st.com 22 ...
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... Programming the output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8.2 Inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8.3 Input and output capacitor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9 Recommended PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 10 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 11 Different output voltage versions of the STBB1-A available on request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2/22 Soft-start and short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Undervoltage lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Over-temperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Doc ID 022197 Rev 2 STBB1-AXX ...
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... STBB1-AXX 1 Block diagram Figure 1. STBB1-A block diagram Oscillator Oscillator VINA VINA DEVICE DEVICE MODE/SYNC MODE/SYNC CONTROL CONTROL EN EN SW1 SW1 Control Control Current Current sensor sensor Modulator Modulator Temp. Temp. Control Control GND GND Block diagram SW2 SW2 V V OUT ...
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... Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 3. Thermal data Symbol R Thermal resistance junction-case thJC R Thermal resistance junction-ambient thJA 4/22 Parameter Parameter Doc ID 022197 Rev 2 STBB1-AXX Value Unit - 0 150 ° 150 ° ...
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... STBB1-AXX 3 Pin configuration Figure 2. Pin connections (top through view) Table 4. Pin description Pin n° Symbol 1 VOUT 2 SW2 3 PGND 4 SW1 5 VIN 6 EN MODE 7 (SYNC) 8 VINA 9 GND 10 FB Exposed pad Name and function Output voltage Switch pin - Internal switches are connected to this pin. Connect inductor ...
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... Application circuit - adjustable output version Figure 4. Application circuit - fixed output version 6/22 L SW2 SW1 OUT Vin VinA STBB1-APUR EN FB MODE/SYN GND PGND L SW2 SW1 Vin VinA STBB1-APUR33 EN MODE/SYN GND PGND Doc ID 022197 Rev 2 STBB1-AXX V OUT C R1 OUT R2 AM07860v1 V OUT OUT C OUT FB AM07861v1 ...
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... STBB1-AXX Table 5. List of external components Component Manufacturer CIN Murata COUT Murata TDK L Coilcraft Above listed components refer to typical application. Operation of the STBB1-A is not limited to the choice of these external components and R2 are calculated according to the following formula ...
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... °C). A Min. Typ. 2.0 1.70 1.50 1.60 485 500 490 500 1 160 = V 600 IN 200 3.4 0.1 1300 1500 1300 1.2 0.01 1.2 0. 0.5 OUT 1 1.6 2.3 0.01 0.01 0.13 0.13 STBB1-AXX Max. Unit 5.5 V 1.80 V 515 mV 510 mV 5.5 V MΩ 250 µA 750 µA 5 µA 1750 kHz 2000 0 µA 0 µ 2 µA 1 µA Ω ...
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... STBB1-AXX Table 6. Electrical characteristics (continued) Symbol Parameter Efficiency 3 ν Thermal shutdown SHDN T Thermal shutdown hysteresis HYS Test conditions mA OUT MODE = OUT mA OUT MODE I = 100 mA OUT MODE Doc ID 022197 Rev 2 Electrical characteristics Min. Typ. Max. ...
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... As soon the V the nominal value the device starts switching again with a programmed average current higher than the one needed by the load. areas vs. output current in typical application conditions. 10/22 Figure 8 in Section 7 Doc ID 022197 Rev 2 STBB1-AXX falls below OUT shows PS mode operation ...
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... STBB1-AXX 6.3 External synchronization The STBB1-A implements external synchronization pin. If and external clock signal is applied to the MODE (SYN) pin with a frequency between 1.35 MHz and 2.0 MHz and with proper low/high levels, the device automatically goes in PWM mode and the external clock is used as switching oscillator. ...
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... Figure 3 Efficiency vs PWM mode OUT 100 100 Output Current [mA] Output Current [mA PWM transition 2.1 2.4 2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 VIN [V] TIMEBASE: 2 µs/div = 3 mA, pulse skipping O O STBB1-AXX and external 1000 1000 ...
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... STBB1-AXX Figure 11. Boost region operation SW1 3 V/div SW2 3 V/div I L 0.2 A/div mV/div AC Coupled TIMEBASE: 0.5µs/div 200 mA, PWM mode Figure 13. Buck-boost region operation SW1 3 V/div SW2 3 V/div I L 0.3 A/div mV/div AC Coupled TIMEBASE: 0.5 µs/div ...
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... VIN VOUT ) MAX × × Δ VIN fs I MAX L × − ( VOUT VIN ) MIN MIN × × Δ VOUT Doc ID 022197 Rev 2 STBB1-AXX and GND OUT Figure 3. ...
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... STBB1-AXX The minimum inductor value for the application is the higher between Equation addition to the inductance value the maximum current the inductor can handle must be calculated in order to avoid saturation. Equation − PEAK BUCK OUT Equation 5 VOUT = I − PEAK BOOST η ...
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... Recommended PCB layout 9 Recommended PCB layout Figure 17. Component placement Figure 18. Top layer routing Figure 19. Bottom layer routing 16/22 Doc ID 022197 Rev 2 STBB1-AXX ...
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... STBB1-AXX 10 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: ECOPACK® trademark. Doc ID 022197 Rev 2 Package mechanical data www ...
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... Package mechanical data Dim. Min 0.18 D 2.85 D2 2.20 E 2. 0.30 ddd 18/22 DFN10 (3x3 mm) mechanical data mm. Typ. Max. 0.90 1.00 0.02 0.05 0.65 0.80 0.20 0.25 0.30 3.00 3.15 3.00 3.15 1.75 0.50 0.40 0.50 0.08 Doc ID 022197 Rev 2 STBB1-AXX mils. Min. Typ. 31.5 35.4 0.8 21.7 25.6 7.9 7.1 9.8 112.2 118.1 86.6 112.2 118.1 55.1 19.7 11.8 15.7 7426335F Max. 39.4 2.0 31.5 11.8 124.0 124.0 68.9 19.7 3.1 ...
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... STBB1-AXX Tape & reel QFNxx/DFNxx (3x3) mechanical data Dim. Min 12 mm. Typ. Max. Min. 180 13.2 0.504 0.795 2.362 14.4 3.3 3.3 1 Doc ID 022197 Rev 2 Package mechanical data inch. Typ. Max. 7.087 0.519 0.567 0.130 0.130 0.043 0.157 0.315 ...
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... Different output voltage versions of the STBB1-A available on request 11 Different output voltage versions of the STBB1-A available on request Table 7. Options available on request Order codes STBB1-APUR18 STBB1-APUR25 STBB1-APUR28 STBB1-APUR33 20/22 Marking BB1 18 BB1 25 BB1 28 BB1 33 Doc ID 022197 Rev 2 STBB1-AXX Output voltages 1.8 V 2.5 V 2.8 V 3.3 V ...
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... STBB1-AXX 12 Revision history Table 8. Document revision history Date Revision 07-Sep-2011 1 04-Oct-2011 2 First release. Added condition °C for the oscillator frequency parameter in A page 8. Doc ID 022197 Rev 2 Revision history Changes Table 6 on 21/22 ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 22/22 Please Read Carefully: © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 022197 Rev 2 STBB1-AXX ...