FPF2116 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

„ 1.8 to 5.5V Input Voltage Range „ 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 „ Fault Blanking „ Reverse Current Blocking

Applications

„ PDAs „ Cell Phones „ GPS Devices „ MP3 Players „ Digital Cameras „ Peripheral Ports „ Hot Swap Supplies General Description 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 P-channel 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. 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. The part is available in a space-saving 5 pin SOT23 package. Typical Application Circuit OFF ON ON VIN GND FPF2116 FLAGB VOUT TO LOAD

www.fairchildsemi.com FPF2116 Rev. B3 FPF2116 IntelliMAX™ Advanced Load Management Products Functional Block Diagram Pin Configuration Pin Description Pin Name Function VIN Supply Input: Input to the power switch and the supply voltage for the IC GND Ground ON ON Control Input FLAGB Fault Output: Active LO, open drain output which indicates an over current supply, under voltage or over temperature state. VOUT Switch Output: Output of the power switch UVLO THERMAL SHUTDOWN CURRENT LIMIT CONTROL LOGIC VIN ON VOUT FLAGB GND REVERSE CURRENT BLOCKING VIN GND ON FLAGB VOUT SOT23-5

www.fairchildsemi.com FPF2116 Rev. B3 FPF2116 IntelliMAX™ Advanced Load Management Products Absolute Maximum Ratings Recommended Operating Range

Electrical Characteristics

Min. Max. Unit VIN, VOUT, ON, FLAGB to GND -0.3 V Power Dissipation @ TA = 25°C (note 1) 667 mW Operating Junction Temperature -40 125 Storage Temperature -65 150 Thermal Resistance, Junction to Ambient 150 °C/W Electrostatic Discharge Protection HBM 4000 V MM 400 V Parameter Min. Max. Unit VIN 1.8 5.5 V Ambient Operating Temperature, TA -40 Parameter Symbol Conditions Min. Typ. Max Units Basic Operation Operating Voltage VIN 1.8 5.5 V Quiescent Current IQ IOUT = 0mA VIN = 1.8 to 3.3V µA VIN = 3.3 to 5.5V 110 200 VIN Shutdown Current VON = 0V, VIN = 5.5V, VOUT short to GND µA VOUT Shutdown Current VON = 0V, VOUT = 5.5V, VIN short to GND µA On-Resistance RON TA = 25°C, IOUT = 50mA 125 160 mΩ TA = -40 to +85°C, IOUT = 50mA 150 ON Input Logic High Voltage (ON) VIH VIN = 1.8V 0.75 V VIN = 5.5V 1.30 ON Input Logic Low Voltage VIL VIN = 1.8V 0.5 V VIN = 5.5V 1.0 ON Input Leakage VON = VIN or GND µA Off Switch Leakage ISWOFF VON = 0V, VOUT = 0V µA FLAGB Output Logic Low Voltage VIN = 5V, ISINK = 10mA 0.1 0.2 V VIN = 1.8V, ISINK = 10mA 0.15 0.3 FLAGB Output High Leakage Current VIN = 5V, Switch on µA Protections Current Limit ILIM VIN = 3.3V, VOUT = 3.0V 200 300 400 mA Thermal Shutdown Shutdown Threshold 140 Return from Shutdown 130 Hysteresis Under Voltage Shutdown UVLO VIN Increasing 1.5 1.6 1.7 V Under Voltage Shutdown Hysteresis mV

www.fairchildsemi.com FPF2116 Rev. B3 FPF2116 IntelliMAX™ Advanced Load Management Products Electrical Characteristics Cont. Note 1: Package power dissipation on 1square inch pad, 2 oz copper board. Parameter Symbol Conditions Min. Typ. Max Units Dynamic Turn on time tON RL=500Ω, CL=0.1µF µs Turn off time tOFF RL=500Ω, CL=0.1µF µs VOUT Rise Time tRISE RL=500Ω, CL=0.1µF µs VOUT Fall Time tFALL RL=500Ω, CL=0.1µF 120 µs Over Current Blanking Time tBLANK ms Auto-Restart Time tRESTART 240 480 960 ms Short Circuit Response Time VIN = VON = 3.3V. Moderate Over-Current Condition. µs VIN = VON = 3.3V. Hard Short. ns

www.fairchildsemi.com FPF2116 Rev. B3 FPF2116 IntelliMAX™ Advanced Load Management Products Description of Operation 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, under-voltage lockout and thermal shutdown. The current limit is preset for 200mA. 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. 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. Current Limiting 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. Under-Voltage Lockout 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 over-temperature 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.

Ordering Information

[mA] Current Limit Blanking Time [ms] Auto-Restart Time [ms] ON Pin Activity Top Mark FPF2116 200 480 Active HI 2116

www.fairchildsemi.com FPF2116 Rev. B3 FPF2116 IntelliMAX™ Advanced Load Management Products

Application Information

5.5V C1 = 10µF R1 = 100KΩ C2 = 0.1µF R2 = 110Ω 5.5V MAX 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. 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, 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, 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, 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. COUT max ILIM min tBLANK min VIN (1) P ILIM RDS 0.4 0.125 20mW (2) P max tBLANK tRETRY tBLANK VIN max ILIM max 960 5.5 0.4 130mW (3)

www.fairchildsemi.com FPF2116 Rev. B3 FPF2116 IntelliMAX™ Advanced Load Management Products Dimensional Outline and Pad Layout

www.fairchildsemi.com FPF2116 Rev. B3 FPF2116 IntelliMAX™ Advanced Load Management Products TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms ACEx™ ActiveArray™ Bottomless™ Build it Now™ CoolFET™ CROSSVOLT™ DOME™ EcoSPARK™ E2CMOS™ EnSigna™ FACT™ FACT Quiet Series™ FAST® FASTr™ FPS™ FRFET™ GlobalOptoisolator™ GTO™ HiSeC™ I2C™ i-Lo™ ImpliedDisconnect™ IntelliMAX™ ISOPLANAR™ LittleFET™ MICROCOUPLER™ MicroFET™ MicroPak™ MICROWIRE™ MSX™ MSXPro™ OCX™ OCXPro™ OPTOLOGIC® OPTOPLANAR™ PACMAN™ POP™ Power247™ PowerEdge™ PowerSaver™ PowerTrench® QFET® QS™ QT Optoelectronics™ Quiet Series™ RapidConfigure™ RapidConnect™ µSerDes™ ScalarPump™ SILENT SWITCHER® SMART START™ SPM™ Stealth™ SuperFET™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 SyncFET™ TinyLogic® TINYOPTO™ TruTranslation™ UHC™ UltraFET® UniFET™ VCX™ Wire™ Across the board. Around the world.™ The Power Franchise® Programmable Active Droop™ Datasheet Identification Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Rev. I17