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MAX4995AAVB+T Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX4995AAVB+T Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 13 page 50mA to 600mA Programmable Current-Limit Switches _______________________________________________________________________________________ 3 Note 3: ILIM is forward current limit. Note 4: Turn-on time and turn-off time are defined as the difference in the time between when the output crosses 10% and 90% of the final output voltage. Note 5: Blanking time and retry time are generated by the same oscillator. Therefore, the ratio of is a constant value of 32. See Figures 2 and 3. t t RETRY BLANK I (mA) 2 R(k 2.48 k LIM SETI = + 9042( ) )( ) V ΩΩ ELECTRICAL CHARACTERISTICS (continued) (VIN = +1.7V to +5.5V, RSETI = 94.3kΩ, CIN = 1µF, and TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at VIN = +3.3V, TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC Turn-On Time tSS VIN = 3.3V, COUT = 1µF, RL = 20 Ω, Figure 1, (Note 4) 120 µs Turn-Off Time tOFF Switch from on to off, VIN = 3.3V, COUT = 1µF, RL = 20 Ω, Figure 1 (Note 4) 120 µs MAX4995A/AL/B/C 5 Current-Limit Reaction Time tLIM VIN = 3.3V, RSETI = 578k Ω, output high and then short-circuit applied MAX4995AF 1.5 µs Blanking Time tBLANK (Note 5) 10 16.3 22.6 ms Retry Time tRETRY MAX4995A/MAX4995AF/MAX4995AL (Note 5) 320 723.2 ms THERMAL PROTECTION Thermal Shutdown +150 °C Thermal-Shutdown Hysteresis 15 °C tSS 10% 90% 10% 90% tOFF VOUT Figure 1. Timing Diagram for Measuring Turn-On Time (tSS) and Turn-Off Time (tOFF). |
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