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ST755CN Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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ST755CN Scheda tecnica(HTML) 1 Page - STMicroelectronics |
1 / 9 page ST755 ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULATORS ® September 1998 s 2.7V TO 11V INPUT TO ADJUSTABLE NEGATIVE OUTPUT CONVERSION s 1W GUARANTEED OUTPUT POWER (Vin>4.5V, T ≤70oC) s 68% TYP. EFFICENCY AT 6V s VERY LOW QUIESCENT CURRENT: 1.2mA IN ON MODE 10 µA IN SHUT DOWN MODE s SOFT START s VERY LOW NOISE OUTPUT s 160KHz FIXED FREQUENCY OSCILLATOR s MIXED BIPOLAR-CMOS TECHNOLOGY DESCRIPTION The ST755 is an adjustable inverting switch-mode DC-DC rergulator with internal Power MOSFET that generaters an adjustable negative output from a voltage input of 2.7V to 11V, output current guaranteed at 200mA (for BLOCK DIAGRAM DIP-8 SO-8 Vin>4.5V, Vout = -5V and 0 oC ≤ Ta ≤ 70oC) and 275mA (typical value at Ta =25 oC, Vout = -5V). A logic controlled shut down pin that interfaces directly with microprocessor reduces supply current to only 10 µA. Input to Output differential voltage is limited to Vin+|Vout|<12.7V. No load supply current is 1.2mA. 1/9 |
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