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MAX776 Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX776 Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 16 page -5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC Controllers 8 _______________________________________________________________________________________ ______________________________________________________________Pin Description PIN NAME FUNCTION 1 OUT 2 FB 3 SHDN 4 REF 1.5V reference output that can source 100 µA. Bypass to ground with 0.1µF. 5 V+ Positive power-supply input 6 CS Noninverting input to the current-sense comparator. Typical trip level is 210mV (relative to V+). 7 EXT The gate-drive output for an external P-channel power MOSFET. EXT swings from OUT to V+. 8 GND Ground The sense input for fixed-output operation (VFB = VREF). OUT is connected to the internal voltage divider, and it is the negative supply input for the EXT driver. Feedback input. When VFB = VREF, the output will be the factory preset value. For adjustable operation, use an external voltage divider, as described in the Adjustable Output section. Active-high shutdown input. With SHDN high, the part is in shutdown mode and the supply current is less than 5 µA. Connect to GND for normal operation. ____________________________Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) CIRCUIT OF FIGURE 2 V+ = 6V, VOUT = -5V A: ILOAD, 30mA TO 1A, 1A/div B: VOUT, 100mV/div, AC-COUPLED LOAD-TRANSIENT RESPONSE 100 µs/div A B CIRCUIT OF FIGURE 2 VOUT = -5V, ILOAD = 1A A: V+, 3V TO 8V, 5V/div B: VOUT, 100mV/div, AC-COUPLED LINE-TRANSIENT RESPONSE 2ms/div A B |
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