FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products tm Features General Description 1.8 to 5.5V Input Voltage Range The FPF2108-FPF2110 is a series of load switches which provides full protection to systems and loads which may encounter large current conditions. This devices contain a 0.125Ω current-limited P-channel MOSFET which can operate over an input voltage range of 1.8-5.5V. Internally, reverse current blocking prevents current 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. 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. Controlled Turn-On 200mA and 400mA Current Limit Options Undervoltage Lockout Thermal Shutdown <2µA Shutdown Current Fast Current limit Response Time 3µs to Moderate Over Currents 20ns to Hard Shorts Reverse Current Blocking Fault Blanking 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 FPF2108, if the constant current condition still persists after 10ms, the part will shut off the switch and pull the fault signal pin (FLAGB) low. The switch will remain off until the ON pin is cycled. For the FPF2109 and FPF2110, 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. The minimum current limit is 200mA for the FPF2109 while that for the FPF2108 and FPF2110 is 400mA. RoHS Compliant Applications PDAs Cell Phones GPS Devices MP3 Players Digital Cameras Peripheral Ports These parts are available in a space-saving 5 pin SOT23 package. Hot Swap Supplies Typical Application Circuit TO LOAD VOUT VIN FPF2108 - FPF2110 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 FPF2108 400 10 NA Active LO 2108 FPF2109 200 0 NA Active HI 2109 FPF2110 400 0 NA Active HI 2110 ©2008 Fairchild Semiconductor Corporation FPF2108-FPF2110 Rev. E 1 www.fairchildsemi.com FPF2108-FPF2110 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 FPF2108-FPF2110 Rev. E 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 FPF2108-FPF2110 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 Temperature Range -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 1.8 5.5 V Operating Voltage VIN Quiescent Current IQ Shutdown Current ISHDN 2 µA Reverse Block Leakage Current IBLOCK 1 µA Latch-Off Current (note 2) ILATCHOFF On-Resistance RON IOUT = 0mA VIN = 1.8 to 3.3V 95 Von active VIN = 3.3 to 5.5V 110 VON = VIN, after an overcurrent fault 50 VIN = 3.3V, IOUT = 50mA, TA = 25°C 125 VIN = 3.3V, IOUT = 50mA, TA = 85°C VIN = 3.3V, IOUT = 50mA, TA = -40°C to +85°C ON Input Logic High Voltage VIH ON Input Logic Low Voltage VIL ON Input Leakage Off Switch Leakage ISWOFF FLAGB Output Logic Low Voltage FLAGB Output High Leakage Current 150 65 VIN = 1.8V 0.75 VIN = 5.5V 1.30 200 µA µA 160 200 mΩ 200 V VIN = 1.8V 0.5 VIN = 5.5V 1.0 V VON = VIN or GND 1 µA VON = 0V, VOUT = 0V 1 µA VIN = 5V, ISINK = 10mA 0.1 0.2 VIN = 1.8V, ISINK = 10mA 0.15 0.3 VIN = 5V, Switch on 1 V µA Protections Current Limit ILIM Thermal Shutdown VIN = 3.3V, VOUT = 3.0V FPF2109 200 300 400 FPF2108, FPF2110 400 600 800 Shutdown Threshold 140 Return from Shutdown 130 Hysteresis Under Voltage Shutdown UVLO °C 10 VIN Increasing Under Voltage Shutdown Hysteresis FPF2108-FPF2110 Rev. E mA 1.5 1.6 47 3 1.7 V mV www.fairchildsemi.com FPF2108-FPF2110 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 tR RL = 500Ω, CL = 0.1µF 12 µs VOUT Fall Time tF RL = 500Ω, CL = 0.1µF 136 µs Over Current Blanking Time tBLANK FPF2108 Short Circuit Response Time 5 10 20 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. Note 2: Applicable only to FPF2108. Latchoff current does not include current flowing into FLAGB. FPF2108-FPF2110 Rev. E 4 www.fairchildsemi.com FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Electrical Characteristics Cont. 120 150 VON = VIN SUPPLY CURRENT (uA) SUPPLY CURRENT (uA) 110 100 90 80 70 2.5 3 3.5 4 4.5 5 5.5 6 VIN = 5.5V 90 VIN = 1.8V 70 -15 10 35 60 85 o TJ, JUNCTION TEMPERATURE ( C) Figure 1. Quiescent Current vs. Input Voltage Figure 2. Quiescent Current vs. Temperature 2000 I_SHDN 2000 VIN = 5.5V 1500 1000 VIN = 3.3V 500 0 -40 -15 10 35 60 I_SWOFF 1500 VIN = 5.5V 1000 VIN = 3.3V 500 0 -40 85 -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) TJ, JUNCTION TEMPERATURE (oC) Figure 3. ISHUTDOWN Current vs. Temperature Figure 4. ISWITCH-OFF Current vs. Temperature 0.20 1.4 0.18 1.2 0.16 SUPPLY CURRENT (uA) SUPPLY CURRENT (uA) VIN = 3.3V SUPPLY VOLTAGE (V) SUPPLY CURRENT (nA) SUPPLY CURRENT (nA) 2500 2 110 50 -40 60 1.5 130 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. VOUT FPF2108-FPF2110 Rev. E -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) SUPPLY VOLTAGE (V) Figure 6. Reverse Current vs. Temperature 5 www.fairchildsemi.com FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Typical Characteristics 700 700 600 FPF2108, FPF2110 OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 600 500 400 300 FPF2109 200 FPF2108, FPF2110 500 400 300 FPF2109 200 100 100 -40 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) VIN-VOUT (V) Figure 7. Current Limit vs. Output Voltage Figure 8. Current Limit vs. Temperature 200 1.4 180 1.2 RON (mOhms) ON THRESHOLD (V) FPF2109, FPF2110 160 VIN = 1.8V 140 VIN = 3.3V 120 VIN = 5.5V 100 80 1 FPF2108 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) Figure 9. R(ON) vs. Temperature 1000 TURN-ON/OFF TIMES (uS) TD T (OFF) OFF TON TD(ON) 10 -40 -15 10 35 60 4 4.5 5 5.5 ILOAD = 10mA VCC = 3.3V T(FALL) 100 T(RISE) 10 1 -40 85 TJ, JUNCTION TEMPERATURE (oC) -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (oC) Figure 11. TON/TOFF vs. Temperature FPF2108-FPF2110 Rev. E 3.5 Figure 10. VIH vs. VIN ILOAD = 10mA VCC = 3.3V TURN-ON/OFF TIMES (uS) 100 3 VIN, INPUT VOLTAGE (V) Figure 12. TRISE/TFALL vs. Temperature 6 www.fairchildsemi.com FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Typical Characteristics FLAG-BLANKING TIME (mS) 12 11 VDRV 2V/DIV 10 9 VOUT 2V/DIV 8 7 IOUT 200mA/DIV 6 VFLAGB 2V/DIV 5 4 -40 -15 10 35 60 85 5mS/DIV TJ, JUNCTION TEMPERATURE (oC) Figure 13. TBLANK vs. Temperature Figure 14. TBLANK Response (VDRV signal forces the device to go into overcurrent condition.) RL = 500Ω, CL = 0.1µF Active High Devices VON 2V/DIV RL = 500Ω, CL = 0.1µF Active High Devices VON 2V/DIV IOUT 10mA/DIV IOUT 10mA/DIV 100µS/DIV 200nS/DIV Figure 15. TON Response VIN 2V / DIV CIN = 10µF COUT = 0.1µF Active High Devices Figure 16. TOFF Response VIN = VON Active High Devices VIN/VON 2V/DIV IOUT 5A/DIV IOUT 200mA/DIV VOUT 2V/DIV 20µS/DIV 50µS/DIV Figure 17. Short Circuit Response Time (Output Shorted to GND) Figure 18. Current Limit Response (Switch power up to hard short) FPF2108-FPF2110 Rev. E 7 www.fairchildsemi.com FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Typical Characteristics FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Typical Characteristics VIN 2V/DIV Active High Devices VON 2V/DIV IOUT 200mA/DIV 50µS/DIV Figure 19. Current Limit Response Time (Output Shorted to GND by 10Ω, moderate short) FPF2108-FPF2110 Rev. E 8 www.fairchildsemi.com Under-Voltage Lockout The FPF2108-FPF2110 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 either 200mA or 400mA. 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. 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 the temperature of the die drops below the threshold temperature. 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. For FPF2108, the ON pin must be toggled to turn on the switch again. The FPF2109 and FPF2110 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. When the MOSFET is off, the body diode is disabled so no current can flow through it. 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 activating LO. For the FPF2108, the FLAGB goes LO at the end of the blanking time while FLAGB goes LO immediately for the FPF2109 and FPF2110. For the FPF2108, FLAGB is latched LO and ON must be toggled to release it.With the FPF2109 and FPF2110, 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. 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 FPF2109 the minimum current is 200mA and the maximum current is 400mA and for the FPF2108 and FPF2110 the minimum current is 400mA and the maximum current is 800mA. The FPF2108 has 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 FPF2109 and FPF2110 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. FPF2108-FPF2110 Rev. E 9 www.fairchildsemi.com FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Description of Operation Typical Application VOUT VIN Battery 1.8V-5.5V FPF2108 - FPF2110 OFF ON ON LOAD R1 = 100KΩ R2 = 499Ω FLAGB GND C2 = 0.1µF C1 = 4.7µF 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 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. Output Capacitor A 0.1µF 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. 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 P = (ILIM) 2 ∗ RDS = (0.8) 2 ∗ 0.125 = 80mW most power and that will only typically be, When in current limit the maximum power dissipation will occur when the output is shorted to ground. A short on the output will cause the part to operate in a constant current state 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. Board Layout 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. FPF2108-FPF2110 Rev. E 10 www.fairchildsemi.com FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Application Information FPF2108-FPF2110 IntelliMAX™ Advanced Load Management Products Dimensional Outline and Pad Layout FPF2108-FPF2110 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 FPF2108-FPF2110 Rev. E 12 www.fairchildsemi.com FPF2108-FPF2110 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.