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MAX4273ESE Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX4273ESE Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 24 page 3V to 12V Current-Limiting Hot Swap Controllers with Autoretry, DualSpeed/BiLevel Fault Protection _______________________________________________________________________________________ 9 Typical Operating Characteristics (continued) (VIN = 5V, RSENSE = 100m Ω, CBOARD = 47µF, TA = +25°C, unless otherwise noted.) CBOARD = 0, RSENSE = 100m Ω, CGATE = 0, RS = 0 ILOAD 1A/div VOUT 2V/div VGATE 2V/div 0 50 µs/div TURN-OFF TIME (CBOARD = 0) MAX4271/3-37 ON 0 Pin Description CBOARD = 0, RSENSE = 100m Ω, CTIM = 10nF, CGATE = 0 VOUT 2V/div VGATE 2V/div ON 100 µs/div STARTUP TIME (CBOARD = 0) MAX4271/3-35 PIN MAX4271 MAX4272 MAX4273 NAME FUNCTION — 1 RTH Current-Sense Threshold Setting Input. Connect a resistor from RTH to VIN to set the fast comparator threshold. Bypass to VIN with 0.1 µF. Connect RTH to VIN to disable both the fast comparator and current regulation at startup. Short RTH to GND for a 200mV threshold. See Fast Comparator Threshold section. — 2 AUXVCC Auxiliary Supply Input. Supply input for short-circuit switchover. To use this, connect a 1 µF capacitor from AUXVCC to GND; otherwise, leave floating. See Auxiliary VCC section. 13 IN Input Voltage. Connect to +2.7V to +13.2V supply; 15V absolute maximum voltage rating. 2 4 SENSE Current-Sense Resistor Voltage Input. RSENSE is connected from IN to SENSE. 3 5 GATE Gate Drive Output. Connect to gate of external N-channel pass transistor. — 6 CEXT External Gate Capacitance Connection. Connect a capacitor from CEXT to GATE to increase the gate charging time. This pin goes high impedance during a fast comparator fault for fast discharge. — 7 LLMON Load Line Monitor. Connect to the source of the external N-channel MOSFET. The external FET is turned on only when the load voltage is less than 100mV. 4 8 GND Ground — 9 CTON Startup Timer Input. Leave floating or connect the timing capacitor from CTON to GND. See Startup and Retry Timers section. 5 10 CSPD Slow Comparator Speed Setting. Leave floating or connect the timing capacitor from CSPD to GND. See Slow Comparator Response Time section. |
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