ST755

® ST755 ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULATORS s s s s s s s s 2.7V TO 11V INPUT TO ADJUSTABLE NEGATIVE OUTPUT CONVERSION 1W GUARANTEED OUTPUT POWER (Vin>4.5V, T≤70oC) 68% TYP. EFFICENCY AT 6V VERY LOW QUIESCENT CURRENT: 1.2mA IN ON MODE 10µA IN SHUT DOWN MODE SOFT START VERY LOW NOISE OUTPUT 160KHz FIXED FREQUENCY OSCILLATOR MIXED BIPOLAR-CMOS TECHNOLOGY DIP-8 SO-8 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 Vin>4.5V, Vout = -5V and 0oC ≤ 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 10µA. Input to Output differential voltage is limited to Vin+|Vout|<12.7V. No load supply current is 1.2mA. September 1998 1/9 ST755 ABSOLUTE MAXIMUM RATINGS Symbol Vc c SHDN I LX Pt ot To p T stg DC Input Voltage to GND Shutdown Voltage Other Input Voltage Peak Switch Current Power Dissipation (at 70 C) (for DIP-8) (for SO-8) Operating Ambient Temperature Range Storage Temperature Range o Parameter Value -0.3 to 12 -0.3 to VCC +0.3 -0.3 to VCC +0.3 2 725 470 -40 to 85 -55 to 150 Unit V V V A mW o o C C Absolute Maximum Rating are those values beyond which damage to the device may occur. Functional operation under these condition is ...