Datasheet MAX4271, MAX4272, MAX4273 (Maxim) - 9
| Hersteller | Maxim |
| Beschreibung | 3V to 12V Current-Limiting Hot-Swap Controllers with Autoretry, DualSpeed/BiLevel Fault Protection |
| Seiten / Seite | 26 / 9 — 3V to 12V Current-Limiting Hot-Swap Controllers. with Autoretry, … |
| Dateiformat / Größe | PDF / 419 Kb |
| Dokumentensprache | Englisch |
3V to 12V Current-Limiting Hot-Swap Controllers. with Autoretry, DualSpeed/BiLevel Fault Protection
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3V to 12V Current-Limiting Hot-Swap Controllers with Autoretry, DualSpeed/BiLevel Fault Protection MAX4271/MAX4272/MAX4273 Typical Operating Characteristics (continued)
(VIN = 5V, RSENSE = 100mΩ, CBOARD = 47µF, TA = +25°C, unless otherwise noted.)
STARTUP TIME (CBOARD = 0) TURN-OFF TIME (CBOARD = 0)
MAX4271/3-35 MAX4271/3-37 ON ON VGATE ILOAD VGATE 2V/div 1A/div 2V/div 0 VOUT VOUT 2V/div 2V/div 0 100μs/div 50μs/div CBOARD = 0, RSENSE = 100mΩ, CBOARD = 0, RSENSE = 100mΩ, CTIM = 10nF, CGATE = 0 CGATE = 0, RS = 0
Pin Description PIN MAX4271 FUNCTION MAX4273 NAME MAX4272
Current-Sense Threshold Setting Input. Connect a resistor from RTH to VIN to set the fast comparator threshold. Bypass to VIN with 0.1μF. Connect RTH to VIN to disable — 1 RTH both the fast comparator and current regulation at startup. Short RTH to GND for a 200mV threshold. See Fast Comparator Threshold section. Auxiliary Supply Input. Supply input for short-circuit switchover. To use this, connect a — 2 AUXVCC 1μF capacitor from AUXVCC to GND; otherwise, leave floating. See Auxiliary VCC section. Input Voltage. Connect to +2.7V to +13.2V supply; 15V absolute maximum voltage 1 3 IN 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. External Gate Capacitance Connection. Connect a capacitor from CEXT to GATE to CEXT — 6 increase the gate charging time. This pin goes high impedance during a fast comparator fault for fast discharge. Load Line Monitor. Connect to the source of the external N-channel MOSFET. The — 7 LLMON external FET is turned on only when the load voltage is less than 100mV. 4 8 GND Ground Startup Timer Input. Leave floating or connect the timing capacitor from CTON to GND. — 9 CTON See Startup and Retry Timers section. Slow Comparator Speed Setting. Leave floating or connect the timing capacitor from 5 10 CSPD CSPD to GND. See Slow Comparator Response Time section.
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(VIN = 5V, RSENSE = 100mΩ, CBOARD = 47µF, TA = +25°C, unless otherwise noted.)
STARTUP TIME (CBOARD = 0) TURN-OFF TIME (CBOARD = 0)
MAX4271/3-35 MAX4271/3-37 ON ON VGATE ILOAD VGATE 2V/div 1A/div 2V/div 0 VOUT VOUT 2V/div 2V/div 0 100μs/div 50μs/div CBOARD = 0, RSENSE = 100mΩ, CBOARD = 0, RSENSE = 100mΩ, CTIM = 10nF, CGATE = 0 CGATE = 0, RS = 0
Pin Description PIN MAX4271 FUNCTION MAX4273 NAME MAX4272
Current-Sense Threshold Setting Input. Connect a resistor from RTH to VIN to set the fast comparator threshold. Bypass to VIN with 0.1μF. Connect RTH to VIN to disable — 1 RTH both the fast comparator and current regulation at startup. Short RTH to GND for a 200mV threshold. See Fast Comparator Threshold section. Auxiliary Supply Input. Supply input for short-circuit switchover. To use this, connect a — 2 AUXVCC 1μF capacitor from AUXVCC to GND; otherwise, leave floating. See Auxiliary VCC section. Input Voltage. Connect to +2.7V to +13.2V supply; 15V absolute maximum voltage 1 3 IN 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. External Gate Capacitance Connection. Connect a capacitor from CEXT to GATE to CEXT — 6 increase the gate charging time. This pin goes high impedance during a fast comparator fault for fast discharge. Load Line Monitor. Connect to the source of the external N-channel MOSFET. The — 7 LLMON external FET is turned on only when the load voltage is less than 100mV. 4 8 GND Ground Startup Timer Input. Leave floating or connect the timing capacitor from CTON to GND. — 9 CTON See Startup and Retry Timers section. Slow Comparator Speed Setting. Leave floating or connect the timing capacitor from 5 10 CSPD CSPD to GND. See Slow Comparator Response Time section.
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