FPF2116 IntelliMAX™ Advanced Load Management Products tm Features General Description 1.8 to 5.5V Input Voltage Range The FPF2116 is a load switch which provides full protection to systems and loads which may encounter large current conditions. This device contains a 0.125Ω current-limited Pchannel MOSFET which can operate over an input voltage range of 1.8-5.5V. Internally, current is prevented from flowing when the MOSFET is off and the output voltage is higher than the input voltage. Switch control is by a logic input (ON) capable of interfacing directly with low voltage control signals. The part contains thermal shutdown protection which shuts off the switch to prevent damage to the part when a continuous over-current condition causes excessive heating. Controlled Turn-On 200mA Current Limit Undervoltage Lockout Thermal Shutdown <2µA Shutdown Current Auto Restart Fast Current limit Response Time 3µs to Moderate Over Currents 20ns to Hard Shorts When the switch current reaches the current limit, the part operates in a constant-current mode to prohibit excessive currents from causing damage. If the constant current condition still persists after 30ms, the part will shut off the switch and pull the fault signal pin (FLAGB) low. An auto-restart feature will turn the switch on again after 480ms if the ON pin is still active. The minimum current limit is 200mA. Fault Blanking Reverse Current Blocking RoHS Compliant Applications PDAs The part is available in a space-saving 5 pin SOT23 package. Cell Phones GPS Devices MP3 Players Digital Cameras Peripheral Ports Hot Swap Supplies Typical Application Circuit TO LOAD VOUT VIN FPF2116 OFF ON ON FLAGB GND Ordering Information Part Current Limit [mA] Current Limit Blanking Time [ms] Auto-Restart Time [ms] ON Pin Activity Top Mark FPF2116 200 30 480 Active HI 2116 ©2008 Fairchild Semiconductor Corporation FPF2116 Rev. D 1 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products August 2008 VIN UVLO REVERSE CURRENT BLOCKING CONTROL LOGIC ON CURRENT LIMIT VOUT THERMAL SHUTDOWN FLAGB GND Pin Configuration VIN 1 GND 2 ON 3 5 VOUT 4 FLAGB SOT23-5 Pin Description Pin Name 1 VIN 2 GND 3 ON 4 FLAGB 5 VOUT FPF2116 Rev. D Function Supply Input: Input to the power switch and the supply voltage for the IC Ground ON Control Input Fault Output: Active LO, open drain output which indicates an over current supply, under voltage or over temperature state. Switch Output: Output of the power switch 2 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Functional Block Diagram Parameter Min VIN, VOUT, ON, FLAGB to GND -0.3 Max Power Dissipation @ TA = 25°C (note 1) Unit 6 V 667 mW Operating Junction Temperature -40 125 °C Storage Temperature -65 150 °C 150 °C/W Thermal Resistance, Junction to Ambient Electrostatic Discharge Protection HBM 4000 V MM 400 V Recommended Operating Range Parameter Min Max Unit VIN 1.8 5.5 V Ambient Operating Temperature, TA -40 85 °C Electrical Characteristics VIN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25°C. Parameter Symbol Conditions Min Typ Max Units Basic Operation Operating Voltage VIN Quiescent Current IQ 1.8 IOUT = 0mA 5.5 VIN = 1.8 to 3.3V 95 VIN = 3.3 to 5.5V 110 200 V µA VIN Shutdown Current VON = 0V, VIN = 5.5V, VOUT short to GND 2 µA VOUT Shutdown Current VON = 0V, VOUT = 5.5V, VIN short to GND 2 µA On-Resistance RON VIN = 3.3V, IOUT = 50mA, TA = 25°C 125 160 VIN = 3.3V, IOUT = 50mA, TA = 85°C 150 200 VIN = 3.3V, IOUT = 50mA, TA = -40°C to +85°C ON Input Logic High Voltage (ON) VIH ON Input Logic Low Voltage VIL 0.75 VIN = 5.5V 1.30 200 V VIN = 1.8V 0.5 VIN = 5.5V 1.0 VON = VIN or GND ON Input Leakage Off Switch Leakage 65 VIN = 1.8V ISWOFF FLAGB Output Logic Low Voltage VON = 0V, VOUT = 0V V 1 µA 1 µA VIN = 5V, ISINK = 10mA 0.1 0.2 VIN = 1.8V, ISINK = 10mA 0.15 0.3 VIN = 5V, Switch on FLAGB Output High Leakage Current mΩ V 1 µA 400 mA Protections Current Limit ILIM Thermal Shutdown VIN = 3.3V, VOUT = 3.0V 200 Shutdown Threshold 140 Return from Shutdown 130 Hysteresis Under Voltage Shutdown UVLO °C 10 VIN Increasing Under Voltage Shutdown Hysteresis FPF2116 Rev. D 300 1.5 1.6 50 3 1.7 V mV www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Absolute Maximum Ratings VIN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at VIN = 3.3V and TA = 25°C. Parameter Symbol Conditions Min Typ Max Units Dynamic Turn On Time tON RL = 500Ω, CL = 0.1µF 25 µs Turn Off Time tOFF RL = 500Ω, CL = 0.1µF 50 µs VOUT Rise Time tRISE RL = 500Ω, CL = 0.1µF 12 µs VOUT Fall Time tFALL RL = 500Ω, CL = 0.1µF 120 µs Over Current Blanking Time Auto-Restart Time Short Circuit Response Time tBLANK 15 30 60 ms tRESTART 240 480 960 ms VIN = VON = 3.3V. Moderate Over-Current Condition. 3 µs VIN = VON = 3.3V. Hard Short. 20 ns Note 1: Package power dissipation on 1square inch pad, 2 oz copper board. FPF2116 Rev. D 4 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Electrical Characteristics Cont. 120 130 VON = VIN SUPPLY CURRENT (uA) SUPPLY CURRENT (uA) 110 100 90 80 110 VIN = 5.5V VIN = 3.3V 90 VIN = 1.8V 70 70 60 1.5 2 2.5 3 3.5 4 4.5 5 5.5 50 -40 6 -15 60 85 Figure 2. Quiescent Current vs. Temperature 500 2000 SUPPLY CURRENT (nA) 2500 SUPPLY CURRENT (nA) 35 o Figure 1. Quiescent Current vs. Input Voltage VIN = 5.5V 1500 1000 VIN = 3.3V 500 0 -40 -15 10 35 60 400 300 VIN = 5.5V 200 VIN = 3.3V 100 0 -40 85 -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) o TJ, JUNCTION TEMPERATURE ( C) Figure 3. ISHUTDOWN Current vs. Temperature Figure 4. ISWITCH-OFF Current vs. Temperature 1.4 0.20 0.18 1.2 0.16 SUPPLY CURRENT (uA) SUPPLY CURRENT (uA) 10 TJ, JUNCTION TEMPERATURE ( C) SUPPLY VOLTAGE (V) 0.14 0.12 0.10 0.08 0.06 0.04 1 VIN = 5.5V 0.8 0.6 0.4 VIN = 3.3V 0.2 0.02 0 -40 0.00 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Figure 5. Reverse Current vs. Output Voltage FPF2116 Rev. D -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) SUPPLY VOLTAGE (V) Figure 6. Reverse Current vs. Temperature 5 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Typical Characteristics 500 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 500 400 300 200 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 300 200 100 -40 100 0.3 400 3 -15 Figure 7. Current Limit vs. Output Voltage 180 1.2 RON (mOhms) ON THRESHOLD (V) 1.4 VIN = 1.8V 140 VIN = 3.3V 120 VIN = 5.5V 100 80 60 85 1 0.8 0.6 0.4 0.2 60 -40 0 -15 10 35 60 85 1.5 2 2.5 TJ, JUNCTION TEMPERATURE (oC) 1000 RISE / FALL TIME (us) TURN ON/OFF TIME (us) TOFF TON -15 10 35 60 4 4.5 5 5.5 ILOAD = 10mA VCC = 3.3V T(FALL) 100 T(RISE) 10 1 -40 85 -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) o TJ, JUNCTION TEMPERATURE ( C) Figure 11. TON/TOFF vs. Temperature FPF2116 Rev. D 3.5 Figure 10. On Threshold vs. VIN ILOAD = 10mA VCC = 3.3V 10 -40 3 VIN, INPUT VOLTAGE (V) Figure 9. RON vs. Temperature 100 35 Figure 8. Current Limit vs. Temperature 200 160 10 TJ, JUNCTION TEMPERATURE (oC) VIN-VOUT (V) Figure 12. TRISE/TFALL vs. Temperature 6 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Typical Characteristics 600 35 550 RESTART TIME (ms) FLAG-BLANKING TIME (ms) 40 30 25 20 -40 -15 10 35 60 500 450 400 -40 85 TJ, JUNCTION TEMPERATURE (oC) 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) Figure 13. TBLANK vs. Temperature Figure 14. TRESTART vs. Temperature VON 2V/DIV VON 2V/DIV VOUT 2V/DIV VOUT 2V/DIV IOUT 200mA/DIV IOUT 200mA/DIV VFLAGB 2V/DIV VFLAGB 2V/DIV 10ms/DIV 100ms/DIV Figure 15. TBLANK Response Figure 16. TRESTART Response RL = 500Ω, CL = 0.1µF RL = 500Ω, CL = 0.1µF VON 2V/DIV VON 2V/DIV IOUT 10mA/DIV IOUT 10mA/DIV 100µs/DIV 200ns/DIV Figure 17. TON Response FPF2116 Rev. D -15 Figure 18. TOFF Response 7 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Typical Characteristics VIN 2V / DIV VIN = VON CIN = 10µF COUT = 0.1µF VIN/VON 2V/DIV IOUT 5A/DIV IOUT 200mA/DIV VOUT 2V/DIV 20µs/DIV 50µs/DIV Figure 19. Short Circuit Response Time (Output Shorted to GND) Figure 20. Current Limit Response (Switch power up to hard short) VIN 2V/DIV VON 2V/DIV IOUT 200mA/DIV 50µs/DIV Figure 21. Current Limit Response Time (Output Shorted to GND by 10Ω, moderate short) FPF2116 Rev. D 8 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Typical Characteristics Current Limiting The FPF2116 is a current limited switch that protects systems and loads which can be damaged or disrupted by the application of high currents. The core of the device is a 0.125Ω P-channel MOSFET and a controller capable of functioning over a wide input operating range of 1.8-5.5V. The controller protects against system malfunctions through current limiting, undervoltage lockout and thermal shutdown. The current limit is preset for 200mA. Under-Voltage Lockout The current limit ensures that the current through the switch doesn't exceed 400mA while not limiting at less than 200mA. The part has a blanking time of 30 ms, nominally, during which the switch will act as a constant current source. At the end of the blanking time, the switch will be turned-off and the FLAGB pin will activate to indicate that current limiting has occurred. The under-voltage lockout turns-off the switch if the input voltage drops below the under-voltage lockout threshold. With the ON pin active the input voltage rising above the under-voltage lockout threshold will cause a controlled turn-on of the switch which limits current over-shoots. On/Off Control The ON pin controls the state of the switch. Activating ON continuously holds the switch in the on state so long as there is no fault. An under-voltage on VIN or a junction temperature in excess of 150°C overrides the ON control to turn off the switch. In addition, excessive current will cause the switch to turn off. The part has an Auto-Restart feature which will automatically turn the switch on again after 480 ms. ON is active HI and has a low threshold making it capable of interfacing with low voltage signals. When the MOSFET is off, the body diode is disabled so no current can flow through it. Thermal Shutdown The thermal shutdown protects the part from internally or externally generated excessive temperatures. During an overtemperature condition the FLAGB is activated and the switch is turned-off. The switch automatically turns-on again if temperature of the die drops below the threshold temperature. Fault Reporting Upon the detection of an over-current, an input under-voltage, or an over-temperature condition, the FLAGB signals the fault mode by immediately activating LO. The FLAGB goes LO at the end of the blanking time. It will remain LO during the fault and immediately returns HI at the end of the fault condition. FLAGB is an open-drain MOSFET which requires a pull-up resistor between VIN and FLAGB. During shutdown, the pull-down on FLAGB is disabled to reduce current draw from the supply. FPF2116 Rev. D 9 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Description of Operation Typical Application VOUT VIN FPF2116 OFF ON Battery 5.5V C1 = 4.7µF ON R1 = 100KΩ R2 = 110Ω FLAGB GND 5.5V MAX C2 = 0.1µF Input Capacitor Board Layout To limit the voltage drop on the input supply caused by transient in-rush currents when the switch turns-on into a discharged load capacitor or a short-circuit, a capacitor needs to be placed between VIN and GND. A 4.7µF ceramic capacitor, CIN, must be placed close to the VIN pin. A higher value of CIN can be used to further reduce the voltage drop experienced as the switch is turned on into a large capacitive load. For best performance, all traces should be as short as possible. To be most effective, the input and output capacitors should be placed close to the device to minimize the effects that parasitic trace inductances may have on normal and short-circuit operation. Using wide traces for VIN, VOUT and GND will help minimize parasitic electrical effects along with minimizing the case to ambient thermal impedance. Output Capacitor A 0.1uF capacitor COUT, should be placed between VOUT and GND. This capacitor will prevent parasitic board inductances from forcing VOUT below GND when the switch turns-off. The total output capacitance needs to be kept below a maximum value, COUT(max), to prevent the part from registering an over-current condition and turning off the switch. The maximum output capacitance can be determined from the following formula, I LIM ( min ) × t BLANK ( min ) C OUT ( max ) = ----------------------------------------------------------------V IN (1) Power Dissipation During normal operation as a switch, the power dissipation is small and has little effect on the operating temperature of the part. The parts with the higher current limits will dissipate the most power and that will only be, 2 2 P = ( I LIM ) × R DS = ( 0.4 ) × 0.125 = 20mW (2) When in current limit the maximum power dissipation will occur when the output is shorted to ground. The power dissipation will scale by the Auto-Restart Time, tRSTRT, and the Over Current Blanking Time, tBLANK, so that the maximum power dissipated is typically, t BLANK P ( max ) = -------------------------------------------- × V IN ( max ) × I LIM ( max ) t RETRY + t BLANK 60 = ----------------------- × 5.5 × 0.4 = 130mW 60 + 960 FPF2116 Rev. D (3) 10 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products Application Information FPF2116 IntelliMAX™ Advanced Load Management Products Dimensional Outline and Pad Layout FPF2116 Rev. 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Obsolete Not In Production Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor. The datasheet is for reference information only. Rev. I35 FPF2116 Rev. D 12 www.fairchildsemi.com FPF2116 IntelliMAX™ Advanced Load Management Products TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidianries, and is not intended to be an exhaustive list of all such trademarks.