FPF2125 Fairchild Semiconductor, FPF2125 Datasheet
FPF2125
Specifications of FPF2125
Related parts for FPF2125
FPF2125 Summary of contents
Page 1
... The FPF2124 does not have this auto-restart feature so the switch will remain off after a current limit fault until the ON pin is cycled. The FPF2125 will not turn off after a current limit fault, but will rather remain in the constant current mode indefinitely ...
Page 2
... V IN UVLO ON THERMAL SHUTDOWN Pin Configuration Pin Description Pin Name GND ISET 5 V OUT FPF2123-FPF2125 Rev. F CONTROL LOGIC CURRENT LIMIT OUT GND ISET ON SOT23-5 Function Supply Input: Input to the power switch and the supply voltage for the IC Ground ON Control Input Current Limit Set Input: A resistor from ISET to ground sets the current limit for the switch. ...
Page 3
... Latch-Off Current On-Resistance ON Input Logic High Voltage (ON Input Logic Low Voltage ON Input Leakage Off Switch Leakage Protections Current Limit Min. Current Limit Thermal Shutdown Under Voltage Shutdown Under Voltage Shutdown Hysteresis FPF2123-FPF2125 Rev. F HBM MM IN Symbol Conditions 0mA V = 1.8 to 3.3V OUT ...
Page 4
... Parameter Dynamic Turn on time Turn off time V Rise Time OUT V Fall Time OUT Over Current Blanking Time Auto-Restart Time Short Circuit Response Time Note 1: Package power dissipation on 1square inch pad, 2 oz. copper board. FPF2123-FPF2125 Rev. F Symbol Conditions 500 , 500 , C = 0.1 F ...
Page 5
... J Figure 3. I Current vs. Temperature SHUTDOWN 0.21 0.18 0.15 0.12 0.09 0.06 0.03 0.00 1.5 2.0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) Figure 5. Reverse Current vs. V FPF2123-FPF2125 Rev -40 4.5 5 5.5 6 Figure 2. Quiescent Current vs. Temperature 500 450 400 350 300 250 200 150 ...
Page 6
... T , JUNCTION TEMPERATURE ( J Figure 9. Current Limit vs. Temperature 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 Input Voltage (V) IN Figure 11. V FPF2123-FPF2125 Rev. F 900 SET 860 820 780 740 700 1.5 1800 1500 1200 900 600 300 200 o C) ...
Page 7
... FALL 100 T RISE 3. 500 Ohms 0.1uF OUT 1 -40 - JUNCTION TEMPERATURE ( J Figure 15 RISE FALL 200 190 180 170 160 150 140 130 120 -40 - JUNCTION TEMPERATURE ( J Figure 17. T RESTART FPF2123-FPF2125 Rev. F 100 500 Ohms L C OUT - - vs. Temperature 2 V DRV 2V/DIV V OUT 2V/DIV I ...
Page 8
... 0 OUT 2V/DIV I OUT 400mA/DIV Figure 23. Current Limit Response (Switch power up to hard short) Note 2: V signal forces the device to go into overcurrent condition by loading a 2.2 resistor. DRV FPF2123-FPF2125 Rev 2V/DIV I OUT 10mA/DIV Response RESTART V IN 2V/DIV I OUT 4A/DIV V OUT 2V/DIV Response ...
Page 9
... For the FPF2124, the ON pin must be toggled to turn-on the switch again. The FPF2125 does not turn off in response to an over current condition but instead remains operating in a constant current mode so long active and the thermal shutdown or under-voltage lockout have not activated ...
Page 10
... Application Information Typical Application OFF ON Battery 5.5V C1=4.7 F Setting Current Limit The FPF2123, FPF2124, and FPF2125 have a current limit which is set with an external resistor connected between ISET and GND. This resistor is selected by using the following equation, 460 R = --------- - SET I LIM Ohms and that of I ...
Page 11
... Once this temperature has been reached, toggling ON will not turn-on the switch until the junction temperature drops. For the FPF2125, a short on the output will cause the part to operate in a constant current state dissipating a worst case power of, ...
Page 12
... Dimensional Outline and Pad Layout FPF2123-FPF2125 Rev www.fairchildsemi.com ...
Page 13
... Definition of Terms Datasheet Identification Product Status Advance Information Formative / In Design Preliminary First Production No Identification Needed Full Production Obsolete Not In Production FPF2123-FPF2125 Rev. F ® FRFET Programmable Active Droop™ ® Global Power Resource SM QFET Green FPS™ QS™ Green FPS™ e-Series™ ...