FPF2214

FPF2213 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

1.8 to 5.5V Input Voltage Range Typical RDS(ON) = 250m @ VIN = 5.5V Typical RDS(ON) = 275m @ VIN = 3.3V 100-250mA (min) Adjustable Current Limit 5% Current Limit Tolerance @ 250mA (min) 72 (typ) Output Discharge Resistance ESD Protected, Above 8000V HBM and 2000V CDM

Applications

The FPF2213-FPF2215 are low RDS(ON) P-Channel MOSFET load switches with high precision current limit value. The input voltage range operates from 1.8V to 5.5V to fulfill today's Ultra Portable Device's supply requirement. Switch control is by a logic input (ON) capable of interfacing directly with low voltage control signal. On-chip pull-down is available for output quick discharge when switch is turned off. For the FPF2214, if the constant current condition still persists after 30ms, these parts will shut off the switch and pull the fault signal pin (FLAGB) low. The FPF2213 has an auto-restart feature, which will turn the switch on again after 450mS if the ON pin is still active. The FPF2214 do not have this auto-restart feature so the switch will remain off until the ON pin is cycled. For the FPF2215, 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 FPF2213 through FPF2215, the current limit is set by an external resistor and the minimum current limit is 100mA.

Ordering Information

(mA) Current Limit Blanking Time (mS) Auto-Restart Time (mS) ON Pin Activity FPF2213 100-250 30 450 Active HI FPF2214 100-250 30 NA Active HI FPF2215 100-250 NA NA Active HI BOTTOM TOP Pin 1

2 www.fairchildsemi.com FPF2213-FPF2215 Rev. B FPF2213-FPF2215 Integrated Load Switch with Adjustable High Precision Current Limit Typical Application Circuit Functional Block Diagram OFF ON ON VIN GND FPF2213/4/5 ISET VOUT TO LOAD FLAGB UVLO THERMAL SHUTDOWN CURRENT LIMIT CONTROL LOGIC VIN ON ISET FLAGB GND VOUT Output Discharge

3 www.fairchildsemi.com FPF2213-FPF2215 Rev. B FPF2213-FPF2215 Integrated Load Switch with Adjustable High Precision Current Limit Pin Configuration Pin Description Absolute Maximum Ratings Recommended Operating Range

Electrical Characteristics

1 ISET Current Limit Set Input : A resistor from ISET to ground sets the current limit for the switch

2 VIN Supply Input: Input to the power switch and the supply voltage for the IC

3 VOUT Switch Output: Output of the power switch

4 FLAGB Fault Output: Active LO, open drain output which indicates an over current, supply

under voltage or over temperature state

5 GND Ground

6 ON ON/OFF Control Input

Parameter Min. Max. Unit VIN, VOUT, ON, FLAGB TO GND -0.3 6 V ISET TO GND -0.3 0.3 V Power Dissipation @ TA = 25°C 1.2 W Operating and Storage Junction Temperature -65 125 °C Thermal Resistance, Junction to Ambient 86 °C/W Electrostatic Discharge Protection HBM 8000 V MM 400 V CDM 2000 V Parameter Min. Max. Unit VIN 1.8 5.5 V Ambient Operating Temperature, TA -40 85 °C Parameter Symbol Conditions Min. Typ. Max. Units Basic Operation Operating Voltage VIN 1.8 5.5 V Quiescent Current IQ IOUT=0mA, VIN= VON=1.8V, RSET=26.8K 45 75 AIOUT=0mA, VIN= VON=3.3V, RSET=26.8K 50 85 IOUT=0mA, VIN= VON=5.5V, RSET=26.8K 60 95 VIN Shutdown Current VON=0V, VIN=5.5V, VOUT=short to GND 2.5 A FLAGB GND ISET1 VIN VOUT ON MicroFET 2x2 6L (BOTTOMVIEW)

4 www.fairchildsemi.com FPF2213-FPF2215 Rev. B FPF2213-FPF2215 Integrated Load Switch with Adjustable High Precision Current Limit VOUT Shutdown Current VON=0V, VOUT=5.5V, VIN=short to GND 1 A On-Resistance RON VIN=5.5V, IOUT=200mA, TA=25°C 250 325 m VIN=3.3V, IOUT=200mA, TA=25°C 275 360 VIN=1.8V, IOUT=200mA, TA=25°C 350 455 VIN=3.3V, IOUT=200mA, TA=-40 to +80°C 135 450 Output Discharge Resistance VIN=3.3V, VON=0V, IOUT=10mA 72 105 ON Input Logic High Voltage (ON) VIH VIN=1.8V 0.8 V VIN=5.5V 1.4 ON Input Logic Low Voltage (OFF) VIL VIN=1.8V 0.5 V VIN=5.5V 1.0 On Input Leakage VON = VIN or GND -1 1 A FLAGB Output Logic Low Voltage VIN=5.5V, ISINK=100A 0.05 0.1 V VIN=1.8V, ISINK=100A 0.12 0.25 FLAGB Output High Leakage Current VIN=5.5V, Switch on 1 A Protections Current Limit ILIM VIN=3.3V, VOUT = 3.0V, RSET=26.8K, TA=25°C 250 263 276 mA Thermal Shutdown Shutdown Threshold 140 °CReturn from Shutdown 130 Hysteresis 10 Under Voltage Shutdown UVLO VIN increasing 1.55 1.65 1.75 V Under Voltage Shutdown Hysteresis 50 mV Dynamic Turn On Time tON RL=500, CL=0.001uF 70 S Turn Off Time tOFF RL=500, CL=0.001uF 600 nS VOUT Rise Time tRISE RL=500, CL=0.001uF 40 S VOUT Fall Time tFALL RL=500, CL=0.001uF 100 nS Over Current Blanking Time tBLANK FPF2213, FPF2214 15 30 60 mS Auto-Restart Time tRSTRT FPF2213 225 450 900 mS Current Limit Response Time VIN = VON = 3.3V. Over-Current Condition: RLOAD=VIN/(ILIMx4) 5 S Parameter Symbol Conditions Min. Typ. Max. Units

9 www.fairchildsemi.com FPF2213-FPF2215 Rev. B FPF2213-FPF2215 Integrated Load Switch with Adjustable High Precision Current Limit Description of Operation The FPF2213, FPF2214, and FPF2215 are state of the art Adjustable High Precision Current Limit 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 0.27 P-channel MOSFET and a controller capable of functioning over an input operating range of 1.8V - 5.5V. The controller protects offers current limiting, UVLO(undervoltage lockout) and thermal shutdown protection. The current limit is adjustable from 100mA to 250mA through the selection of an external resistor. On/Off Control The ON pin is active high, and controls the state of the switch. Applying a continuous high signal will hold the switch in the on state. The switch will move into the OFF state when the active high is removed, or if a fault is encountered. For all versions, an undervoltage on VIN or a junction temperature in excess of 140°C overrides the ON control to turn off the switch. In addition, excessive currents will cause the switch to turn off in the FPF2213 and FPF2214. The FPF2213 has an Auto-Restart feature which will automatically turn the switch on again after 450ms. For the FPF2214, the ON pin must be toggled to turn-on the switch again. The FPF2215 does not turn off in response to an over current condition but instead remains operating in a constant current mode so long as ON is active and the thermal shutdown or UVLO have not activated. Fault Reporting Upon the detection of an over-current condition, an input UVLO, or an over-temperature condition, the FLAGB signals the fault mode by activating LO. In the event of an over-current condition for the FPF2213 and FPF2214, the FLAGB goes LO at the end of the blanking time while FLAGB goes LO immediately for the FPF2215. If the over-current condition lasts longer than blanking time, FLAGB remains LO through the Auto-Restart Time for the FPF2213 while for the FPF2214, FLAGB is latched LO and ON must be toggled to release it. With the FPF2215, 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. A 100K pull up resistor is recommended to be used in the application. 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. The current at which the parts will limit is adjustable through the selection of an external resistor connected to the ISET pin. Information for selecting the resistor is found in the Application Information section of this datasheet. The FPF2213 and FPF2214 have a blanking time of 30ms (nominal) during which the switch will act as a constant current source. At the end of the blanking time, the switch will be turned-off. The FPF2215 has no current limit blanking period so it will remain in a constant current state until the ON pin is deactivated or the thermal shutdown turns-off the switch. Undervoltage Lockout (UVLO) The undervoltage lockout turns-off the switch if the input voltage drops below the undervoltage lockout threshold. With the ON pin active the input voltage rising above the undervoltage lockout threshold will cause a controlled turn-on of the switch which limits current over-shoots. Output Discharge Resistor The FPF2213/4/5 family contains an 80 on-chip load resistor for quick output discharge when the switch is turned off. This features become more attractive when application requires large output capacitor to be discharge when the switch tunrs off. However, VOUT pin should not be connected directly to the battery source due to the discharge mechanism of the load switch. Thermal Shutdown The thermal shutdown protects the die 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.

10 www.fairchildsemi.com FPF2213-FPF2215 Rev. B FPF2213-FPF2215 Integrated Load Switch with Adjustable High Precision Current Limit

Application Information

The FPF2213, FPF2214, and FPF2215 have adjustable high precision current limit which is set with an external resistor connected between ISET and GND. Please see the layout recommendation section of the application note for the recommended RSET layout. The RSET resistance is selected by using the following equation: For a particular ILIM(min) value, RSET can be calculated from below formula: FPF221X family has 5% precision at higher load current. The ILIM (Max) and tolerance of current limit value can be determined using Figure 21 (ILIM vs RSET ) and the following formula: The table and figure below can be used to select RSET: Input Capacitor To limit the voltage drop on the input supply caused by transient in-rush currents when the switch is turned on into a discharged load capacitor or a short-circuit, a capacitor is recommended to be placed between VIN and GND. A 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. For the FPF2213 and FPF2214, 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 on-state operation, the power dissipated in the device will depend upon the level at which the current limit is set. The maximum allowed setting for the current limit is 250mA and will result in a power dissipation of: If the part goes into current limit, maximum power dissipation will occur when the output is shorted to ground. For the FPF2213, the power dissipation will be scaled by the Auto- Restart Time, tRSTRT, and the Over Current Blanking Time, tBLANK. Therefore, the maximum power dissipated is: RSET [k] Min. Current Limit [mA] Typ. Current Limit [mA] Max. Current Limit [mA] Tol [%] 26.8 250 263 276 5.0 28.0 238 252 265 5.4 29.4 226 240 253 5.7 30.0 221 235 249 5.8 32.4 204 218 232 6.4 36.5 179 193 208 7.5 40.2 160 175 190 8.5 48.7 129 145 161 11.1 60.0 100 118 135 15.0 ILIM (Typ) (mA) = 7050 RSET (K) RSET(K) = 7050 ILIM (Min) (mA) + 10 + 750 ILIM (Min) (mA) Tolerance (%) = 100 * ILIM (Typ) - ILIM (Min) ILIM (Typ) ILIM (Max) = ILIM (Typ) + ILIM (Typ) * Tolerance (%) 100 Table 1: RSET Selection Guide Figure 21. ILIM vs RSET

13 www.fairchildsemi.com FPF2213-FPF2215 Rev. B FPF2213-FPF2215 Integrated Load Switch with Adjustable High Precision Current Limit Dimensional Outline and Pad Layout

14 www.fairchildsemi.com FPF2213-FPF2215 Rev. B FPF2213-FPF2215 Integrated Load Switch with Adjustable High Precision Current Limit Rev. I33 TRADEMARKS The following are registered and unregistered trademarks and service marks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. * EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconducntor. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT 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. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. 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, and (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® Build it Now™ CorePLUS™ CROSSVOLT™ CTL™ Current Transfer Logic™ EcoSPARK® EZSWITCH™ * Fairchild® Fairchild Semiconductor® FACT Quiet Series™ FACT® FAST® FastvCore™ FlashWriter® * FPS™ FRFET® Global Power ResourceSM Green FPS™ Green FPS™ e-Series™ GTO™ i-Lo™ IntelliMAX™ ISOPLANAR™ MegaBuck™ MICROCOUPLER™ MicroFET™ MicroPak™ MillerDrive™ Motion-SPM™ OPTOLOGIC® OPTOPLANAR® PDP-SPM™ Power220® POWEREDGE® Power-SPM™ PowerTrench® Programmable Active Droop™ QFET® QS™ QT Optoelectronics™ Quiet Series™ RapidConfigure™ SMART START™ SPM® STEALTH™ SuperFET™ SuperSOT™ -3 SuperSOT™ -6 SuperSOT™ -8 SupreMOS™ SyncFET™ The Power Franchise® TinyBoost™ TinyBuck™ TinyLogic® TINYOPTO™ TinyPower™ TinyPWM™ TinyWire™ µSerDes™ UHC® Ultra FRFET™ UniFET™ VCX™ 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; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice 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 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.