FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products General Description Features The FPF2100 through FPF2107 is a family of load switches which provide full protection to systems and loads which may encounter large current conditions. These devices contain a 0.125Ω current-limited P-channel MOSFET which can operate over an input voltage range of 1.8-5.5V. Switch control is by a logic input (ON) capable of interfacing directly with low voltage control signals. Each 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. 1.8 to 5.5V Input Voltage Range Controlled Turn-On 200mA and 400mA Current Limit Options Undervoltage Lockout Thermal Shutdown <1uA Shutdown Current Auto restart Fast Current limit Response Time When the switch current reaches the current limit, the part operates in a constant-current mode to prohibit excessive currents from causing damage. For the FPF2100-FPF2102 and FPF2104-FPF2106, if the constant current condition still persists after 10ms, these parts will shut off the switch and pull the fault signal pin (FLAGB) low. The FPF2100, FPF2101, FPF2104 and FPF2105, have an auto-restart feature which will turn the switch on again after 160ms if the ON pin is still active. The FPF2102 and FPF2106 do not have this auto-restart feature so the switch will remain off until the ON pin is cycled. For the FPF2103 and FPF2107, a current limit condition will immediately pull the fault signal pin low and the part will remain in the constant-current mode until the switch current falls below the current limit. For the FPF2100 through FPF2103, the minimum current limit is 200mA while that for the FPF2104 through FPF2107 is 400mA. 3us to Moderate Over Currents 20ns to Hard Shorts Fault Blanking Applications PDAs Cell Phones GPS Devices MP3 Players Digital Cameras Peripheral Ports Hot Swap Supplies These parts are available in a space-saving 5 pin SOT23 package. Typical Application Circuit TO LOAD VOUT VIN FPF2100 - FPF2107 OFF ON ON FLAGB GND ©2005 Fairchild Semiconductor Corporation FPF2100-FPF2107 Rev. D2 1 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products May 2005 VIN UVLO 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 FPF2100-FPF2107 Rev. D2 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 FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Functional Block Diagram Parameter Min. VIN, VOUT, ON, FLAGB to GND Max. -0.3 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 5.5 V Basic Operation Operating Voltage VIN Quiescent Current IQ 1.8 IOUT = 0mA VIN = 1.8 to 3.3V 95 Von active VIN = 3.3 to 5.5V 110 Shutdown Current ISHDN Latch-Off Current (note 2) ILATCHOFF VON = VIN, after an overcurrent fault 50 On-Resistance RON TA = 25°C, IOUT = 50mA 125 TA = -40 to +85°C, IOUT = 50mA 150 ON Input Logic High Voltage ON Input Logic Low Voltage VIH VIL ON Input Leakage Off Switch Leakage ISWOFF FLAGB Output Logic Low Voltage FLAGB Output High Leakage Current A 200 1 VIN = 1.8V 0.75 VIN = 5.5V 1.30 A A 160 m V VIN = 1.8V 0.5 VIN = 5.5V 1.0 V VON = VIN or GND 1 A VON = 0V, VOUT = 0V 1 A V VIN = 5V, ISINK = 10mA 0.1 0.2 VIN = 1.8V, ISINK = 10mA 0.15 0.3 VIN = 5V, Switch on 1 A mA Protections Current Limit Thermal Shutdown FPF2100-FPF2107 Rev. D2 ILIM VIN = 3.3V, VOUT = 3.0V FPF2100, FPF2101, FPF2102, FPF2103 200 300 400 FPF2104, FPF2105, FPF2106, FPF2107 400 600 800 Shutdown Threshold 140 Return from Shutdown 130 Hysteresis 10 3 °C www.fairchildsemi.com FPF2100-FPF2107 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 1.5 1.6 1.7 Units Protections Under Voltage Shutdown UVLO VIN Increasing Under Voltage Shutdown Hysteresis V 47 mV Dynamic Turn on time tON RL=500 , CL=0.1uF 25 s Turn off time tOFF RL=500 , CL=0.1uF 50 s VOUT Rise Time tR RL=500 , CL=0.1uF 12 s VOUT Fall Time tF RL=500 , CL=0.1uF Over Current Blanking Time tBLANK FPF2100, FPF2101, FPF2102, FPF2104, FPF2105, FPF2106 5 10 20 ms Auto-Restart Time tRSTRT FPF2100, FPF2101, FPF2104, FPF2105 80 160 320 ms Short Circuit Response Time 136 s VIN = VON = 3.3V. Moderate Over-Current Condition. 3 s VIN = VON = 3.3V. Hard Short. 20 ns Note 1: Package power dissipation on 1square inch pad, 2 oz copper board. Note 2: Applicable only to FPF2102 and FPF2106. Latchoff current does not include current flowing into FLAGB. FPF2100-FPF2107 Rev. D2 4 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Electrical Characteristics Cont. 150 120 VON = VIN SUPPLY CURRENT (uA) SUPPLY CURRENT (uA) 110 100 90 80 70 60 1.5 2 2.5 3 3.5 4 4.5 5 5.5 130 110 -15 10 35 60 85 o SUPPLY VOLTAGE (V) TJ, JUNCTION TEMPERATURE ( C) Figure 1. Quiescent Current vs. Input Voltage Figure 2. Quiescent Current vs. Temperature 500 SUPPLY CURRENT (nA) 600 SUPPLY CURRENT (nA) VIN = 1.8V 70 I_SHDN 500 400 VIN = 5.5V 300 200 VIN = 3.3V 100 -15 10 35 60 I_SWOFF 400 300 VIN = 5.5V 200 VIN = 3.3V 100 0 -40 85 -15 10 35 60 85 o o TJ, JUNCTION TEMPERATURE ( C) TJ, JUNCTION TEMPERATURE ( C) Figure 3. ISHUTDOWN Current vs. Temperature Figure 4. ISWITCH-OFF Current vs. Temperature 63 1.4 59 1.2 55 1 FPF2100, 2102, 2103, 2104, 2106, 2107 ON THRESHOLD (V) SUPPLY CURRENT (uA) VIN = 3.3V 90 50 -40 6 700 0 -40 VIN = 5.5V VIN = 5.5V 51 47 VIN = 3.3V 43 39 35 -40 0.8 FPF2101, 2105 0.6 0.4 0.2 -15 10 35 60 0 1.5 85 o 2 2.5 3 3.5 4 TJ, JUNCTION TEMPERATURE ( C) VIN, INPUT VOLTAGE (V) Figure 5. ILATCHOFF vs. Temperature Figure 6. VIH vs. VIN FPF2100-FPF2107 Rev. D2 5 4.5 5 5.5 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Typical Characteristics 700 700 600 FPF2104 - FPF2107 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 600 500 400 300 FPF2100 - FPF2103 200 400 300 FPF2100 - FPF2103 200 100 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 100 -40 3 -15 85 Figure 7. Current Limit vs. Output Voltage Figure 8. Current Limit vs. Temperature 150 180 140 160 130 120 VIN = 5.5V 100 80 60 -40 90 2 3 4 5 VIN = 3.3V 120 100 1 VIN = 1.8V 140 110 6 -15 60 85 60 85 Figure 10. R(ON) vs. Temperature 1000 TURN-ON/OFF TIMES (uS) ILOAD = 10mA VCC = 3.3V TD(OFF) TD(ON) 10 35 TJ, JUNCTION TEMPERATURE ( C) Figure 9. R(ON) vs. VIN -15 10 o VIN, INPUT VOLTAGE (V) TURN-ON/OFF TIMES (uS) 60 o 200 10 -40 35 TJ, JUNCTION TEMPERATURE ( C) 160 100 10 VIN-VOUT (V) RON (mOhms) R(ON) (mOhms) FPF2104 - FPF2107 500 35 60 ILOAD = 10mA VCC = 3.3V T(FALL) 100 T(RISE) 10 1 -40 85 o -15 10 35 o TJ, JUNCTION TEMPERATURE ( C) TJ, JUNCTION TEMPERATURE ( C) Figure 11. TON/TOff vs. Temperature Figure 12. TRISE/TFALL vs. Temperature FPF2100-FPF2107 Rev. D2 6 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Typical Characteristics 180 11 160 10 RESTART TIME (mS) FLAG-BLANKING TIME (mS) 12 9 8 7 6 5 4 -40 140 120 100 80 60 40 20 -15 10 35 60 0 -40 85 o -15 10 35 60 TJ, JUNCTION TEMPERATURE ( C) Figure 13. TBLANK vs Temperature Figure 14. TRESTART vs Temperature VDRV3 2V/DIV VDRV3 2V/DIV VOUT 2V/DIV VOUT 2V/DIV IOUT 200mA/DIV IOUT 200mA/DIV VFLAGB 2V/DIV VFLAGB 2V/DIV 5mS/DIV 20mS/DIV Figure 15. TBLANK Response Figure 16. TRESTART Response RL = 500Ω, CL = 0.1uF VON 2V/DIV RL = 500Ω, CL = 0.1uF VON 2V/DIV IOUT 10mA/DIV IOUT 10mA/DIV 100uS/DIV 200nS/DIV Figure 17. TON Response FPF2100-FPF2107 Rev. D2 85 o TJ, JUNCTION TEMPERATURE ( C) Figure 18. TOFF Response 7 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Typical Characteristics VIN 2V / DIV VIN = VON CIN = 10uF COUT = 0.1uF VIN/VON 2V/DIV IOUT 5A/DIV IOUT 200mA/DIV VOUT 2V/DIV 20uS/DIV 50uS/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 50uS/DIV Figure 21. Current Limit Response Time (Output Shorted to GND by 10Ω, moderate short) Note 3: VDRV signal forces the device to go into overcurrent condition. FPF2100-FPF2107 Rev. D2 8 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Typical Characteristics Current Limiting The current limit ensures that the current through the switch doesn't exceed a maximum value while not limiting at less than a minimum value. For the FPF2100-FPF2103 the minimum current is 200mA and the maximum current is 400mA and for the FPF2104-FPF2107 the minimum current is 400mA and the maximum current is 800mA. The FPF2100-FPF2103 have a blanking time of 10ms, 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 FPF2103 and FPF2107 have no current limit blanking period so immediately upon a current limit condition FLAGB is activated. These parts will remain in a constant current state until the ON pin is deactivated or the thermal shutdown turns-off the switch. The FPF2100-FPF2107 are current limited switches that protect systems and loads which can be damaged or disrupted by the application of high currents. The core of each 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, under-voltage lockout and thermal shutdown. The current limit is preset for either 200mA or 400mA. On/OffControl The ON pin controls the state of the switch. Active HI and LO versions are available. Refer to the Ordering Information for details. Activating ON continuously holds the switch in the on state so long as there is no fault. For all versions, 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 currents will cause the switch to turn off in FPF2100-FPF2102 and FPF2104-FPF2107. The FPF2100, FPF2101, FPF2104 and FPF2105 have an Auto-Restart feature which will automatically turn the switch on again after 160ms. For the FPF2102 and FPF2106, the ON pin must be toggled to turn-on the switch again. The FPF2103 and FPF2107 do not turn off in response to a over current condition but instead remain operating in a constant current mode so long as ON is active and the thermal shutdown or under-voltage lockout have not activated. 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. Fault Reporting Thermal Shutdown Upon the detection of an over-current, an input under-voltage, or an over-temperature condition, the FLAGB signals the fault mode by activating LO. For the FPF2100-FPF2102 and FPF2104-FPF2106, the FLAGB goes LO at the end of the blanking time while FLAGB goes LO immediately for the FPF2103 and FPF2107. FLAGB remains LO through the Auto-Restart Time for the FPF2100, FPF2101 FPF2104 and FPF2105. For the FPF2102 and FPF2106, FLAGB is latched LO and ON must be toggled to release it.With the FPF2103 and FPF2107, FLAGB is LO during the faults 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. The thermal shutdown protects the part from internally or externally generated excessive temperatures. During an over-temperature condition the FLAGB is activated and the switch is turned-off. The switch automatically turns-on again if the temperature of the die drops below the threshold temperature. Reverse Voltage If the voltage at the VOUT pin is larger than the VIN pin, large curents may flow and can cause permanent damage to the device. FPF2100-FPF2107 is designed to control current flow from VIN to VOUT. Under-Voltage Lockout Ordering Information Part Current Limit [mA] Current Limit Blanking Time [ms] Auto-Restart Time [ms] ON Pin Activity Top Mark FPF2100 200 10 160 Active HI 2100 FPF2101 200 10 160 Active LO 2101 FPF2102 200 10 NA Active HI 2102 FPF2103 200 0 NA Active HI 2103 FPF2104 400 10 160 Active HI 2104 FPF2105 400 10 160 Active LO 2105 FPF2106 400 10 NA Active HI 2106 FPF2107 400 0 NA Active HI 2107 FPF2100-FPF2107 Rev. D2 9 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Description of Operation Typical Application LOAD VOUT VIN R1 = 100KΩ FPF2100 - FPF2107 Battery 1.8V-5.5V OFF ON ON R2 = 499Ω FLAGB C2 = 0.1µF GND C1 = 10µF Input Capacitor 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 0.1uF ceramic capacitor, CIN, placed close to the pins is usually sufficient. Higher values of CIN can be used to further reduce the voltage drop. If the part goes into current limit the maximum power dissipation will occur when the output is shorted to ground. For the FPF2100, FPF2101, FPF2104 and FPF2105, 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, Output Capacitor tBLANK ∗ VIN(max) ∗ ILIM(max) tRETRY + tBLANK 10 = ∗ 5.5 ∗ 0.8 = 260mW 10 + 160 P(max) = 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. For the FPF2100-FPF2102 and the FPF2104-FPF2106, the total output capacitance needs to be kept below a maximum value, COUT(max), to prevent the part from registering an over-current When using the FPF2102 and FPF2106 attention must be given to the manual resetting of the part. Continuously resetting the part at a high duty cycle when a short on the output is present can cause the temperature of the part to increase. The junction temperature will only be allowed to increase to the thermal shutdown threshold. Once this temperature has been reached, toggling ON will not turn on the switch until the junction temperature drops. For the FPF2103 and FPF2107, a short on the output will cause the part to operate in a constant current state dissipating a worst case power as calculated in (3) until the thermal shutdown activates. It will then cycle in and out of thermal shutdown so long as the ON pin is active and the short is present. condition and turning off the switch. The maximum output capacitance can be determined from the following formula, C OUT (max) = I LIM (max) ∗ t BLANK (min) V IN (1) Due to the integral body diode in the PMOS switch, a CIN greater than COUT is highly recommended. A COUT greater than CIN can cause VOUT to exceed VIN when the system supply is removed. This could result in current flow through the body diode from VOUT to VIN. Board Layout Power Dissipation 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. 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 typically be, P = (ILIM)2 ∗ RDS = (0.8)2 ∗ 0.125 = 80mW FPF2100-FPF2107 Rev. D2 (3) (2) 10 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Application Information FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products Dimensional Outline and Pad Layout FPF2100-FPF2107 Rev. D2 11 www.fairchildsemi.com FPF2100-FPF2107 IntelliMAX™ Advanced Load Management Products www.fairchildsemi.com 12 FPF2100-FPF2107 Rev. D2