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TC126503ECT Scheda tecnica(PDF) 3 Page - Microchip Technology |
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TC126503ECT Scheda tecnica(HTML) 3 Page - Microchip Technology |
3 / 12 page © 2002 Microchip Technology Inc. DS21372B-page 3 TC125/TC126 2.0 PIN DESCRIPTIONS Thedescriptionsof the pins arelistedinTable2-1. TABLE 2-1: PIN FUNCTION TABLE TC125 Pin No. (5-Pin SOT-23A) TC126 Pin No. (5-Pin SOT-23A) Symbol Description 1 — SHDN Shutdown input. A logic low on this input suspends device operation and supply current is reduced to less than 0.5 µA. The device resumes normal operation when SHDN is again brought high. — 1 SENSE Voltage sense input. This input provides feedback voltage sensing to the internal error amplifier. It must be connected to the output voltage node, preferably the single point in the system where tight voltage regulation is most beneficial. 2 — PS Power and voltage sense input. This dual function input provides both feedback voltage sensing and internal chip power. It should be connected to the regulator output. (See Figure 3-1). —2 VDD Power supply voltage input. 3 3 NC Not connected. 4 4 GND Ground terminal. 5 5 LX Inductor switch output. LX is the drain of an internal N-channel switching transistor. This terminal drives the external inductor, which ultimately provides current to the load. |
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