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TS51221-M033QFNR Scheda tecnica(PDF) 2 Page - Semtech Corporation |
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TS51221-M033QFNR Scheda tecnica(HTML) 2 Page - Semtech Corporation |
2 / 18 page TS51221 Final Datasheet Rev 1.1 April 6, 2015 www.semtech.com 2 of 18 Semtech Pinout Figure 1: 16 Lead 3x3 QFN, Top View Pin Description Pin # Pin Name Pin Function Description 1 VSW SwitchingVoltageNode Connectedto4.7uH(typical)inductor 2 VCC InputVoltage Inputvoltage 3 VCC InputVoltage Inputvoltage 4 GND GND Primarygroundforthemajorityofthedeviceexceptthelow-side powerFET 5 FB FeedbackInput RegulatorFBVoltage.ConnectstoVOUTforfixedmodeandtheoutput resistordividerforadjustablemode 6 NC NoConnect NotConnected 7 NC NoConnect NotConnected 8 PG PowerGoodOutput Open-drainoutput 9 EN EnableInput Above2.2Vthedeviceisenabled.GNDthepintoputdevicein standbymode.Includesinternalpull-up 10 BST BootstrapCapacitor Bootstrapcapacitorforthehigh-sideFETgatedriver.22nFceramic capacitorfromBSTpintoVSWpin 11 VCC InputVoltage InputVoltage 12 VSW SwitchingVoltageNode Connectedto4.7uH(typical)inductor 13 VSW SwitchingVoltageNode Connectedto4.7uH(typical)inductor 14 PGND PowerGND GNDsupplyforinternallow-sideFET/integrateddiode 15 PGND PowerGND GNDsupplyforinternallow-sideFET/integrateddiode 16 VSW SwitchingVoltageNode Connectedto4.7uH(typical)inductor VCC VCC GND VSW VCC BST EN VSW TS51221 PIN 1 |
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