MAX4995B Maxim, MAX4995B Datasheet
MAX4995B
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MAX4995B Summary of contents
Page 1
... Each device in the family handles an overcurrent event differently depending on the option selected. The MAX4995A/MAX4995AF/MAX4995AL go into an autoretry mode, the MAX4995B latches off the switch, and the MAX4995C places the device in a continuous current-limit mode. Additional safety features include thermal shutdown to prevent overheating and reverse- current blocking to prevent current from being driven back into the source ...
Page 2
... -40°C to +125°C, unless otherwise noted. Typical values are CONDITIONS switch on 3.3V Q OUT 3.3V after an overcurrent IN OUT I LATCH fault (MAX4995B 5.5V, V SHDN 1.7V RSHDN V = 5.5V (current into OUT) ...
Page 3
ELECTRICAL CHARACTERISTICS (continued +1.7V to +5.5V 94.3kΩ SETI +25°C.) A PARAMETER SYMBOL OUTPUT Output Logic-Low Voltage Output Leakage Current DYNAMIC Turn-On Time Turn-Off Time Current-Limit Reaction Time Blanking Time Retry Time ...
Page 4
Programmable Current-Limit Switches (V = +3.3V 1µ 1µ OUT CURRENT LIMIT vs. SUPPLY VOLTAGE 315 MAX4995AL 310 305 300 295 290 285 1.5 2.0 2.5 3.0 3.5 SUPPLY VOLTAGE (V) ...
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... TEMPERATURE 2.50 MAX4995AL 2.25 2.00 1.75 1.50 1. 1.00 0.75 0. 3.3V IN 0.25 0 -40 -25 - 110 TEMPERATURE (°C) LATCHOFF CURRENT vs. TEMPERATURE 20 MAX4995B 3. 125 -40 -25 - 110 TEMPERATURE (°C) SWITCH TURN-ON TIME vs. TEMPERATURE 180 MAX4995C 170 I = 10mA LOAD ...
Page 6
... V OUT (2V/div FLAG 11 (2V/div /FLAG vs OUT DROP IN OUT 350 MAX4995B 300 250 200 150 100 5. 140 210 280 350 420 490 560 630 V (mV) DROP SWITCH TURN-OFF TIME RESPONSE MAX4995A toc17 ...
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... Pin Configurations OUT N.C. SETI GND FLAG MAX4995A/MAX4995AF IN MAX4995AL/MAX4995B MAX4995C ON (ON)* * FLAG ON (ON)* TDFN (2mm × 2mm) Pin Description NAME FUNCTION Power Input. Bypass IN with a 1μF ceramic capacitor to ground. Use higher capacitance to ...
Page 8
... Programmable Current-Limit Switches PIN (UTQFN) PIN (TDFN-EP) MAX4995AL MAX4995_ MAX4995AL — — — MAX4995A/MAX4995AF/ MAX4995AL/MAX4995B/ MAX4995C IN UVLO N.C. SOFT-START ON (ON FOR THE MAX4995AL ONLY. 8 _______________________________________________________________________________________ Pin Description (continued) PIN (SOT23) MAX4995_ MAX4995AL MAX4995_ 7 — — ...
Page 9
... MAX4995C goes into thermal shutdown. The ON input for the MAX4995_/MAX4995AF and ON input for the MAX4995AL control the switch; see Table 1. Toggle ON for the MAX4995B to reset the fault condi- tion once the short current is detected and the device BLANK shuts down. ...
Page 10
Programmable Current-Limit Switches OUT CURRENT LIMIT LOAD CURRENT FLAG Figure 2. Autoretry Fault Diagram CURRENT LIMIT LOAD CURRENT THE DEVICE GOES TO THERMAL-SHUTDOWN MODE Figure 3. Latchoff Fault Diagram FLAG is an open-drain fault indicator output and ...
Page 11
... Due to the very fast current-limit reaction time of the MAX4995AF, a larger output capacitance might need to be connected at the output to dampen oscillation due to long wires. Choose a value large enough to ensure OUT doesn’t exceed the absolute maximum ratings. 602 To optimize the switch response time to output short- 500 ...
Page 12
... FLAG OUT MAX4995A/ ON MAX4995AF/ (ON*) MAX4995AL/ MAX4995B/ MAX4995C SETI N.C. R SETI GND *( ) FOR THE MAX4995AL ONLY. For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...
Page 13
... Added the TDFN pin configuration drawing to the Pin Configurations section. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...