FAIRCHILD SEMICONDUCTOR FPF2500-FPF2506 IntelliMAX Advanced Load Management Products Manual
Contents
1. EcoSPARK SCTU MSXPro RapidConnect UHC E CMOS i Lo OCXTM uSerDes TM UltraFET9 EnSigna ImpliedDisconnect OCXPro ScalarPump UniFET FACT IntelliMAX OPTOLOGIC SILENT SWITCHER VCXTM FACT Quiet Series OPTOPLANAR SMART START Wire PACMAN SPM Across the board Around the world POP Stealth The Power Franchise Power247 SuperFET Programmable Active Droop PowerEdge SuperSOT 3 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 support2. L February 2006 FAIRCHILD ll SEMICONDUCTOR FPF2500 FPF2506 IntelliMAX Advanced Load Management Products Features General Description W 4 5 to 20V Input Voltage Range The FPF2500 through FPF2506 is a family of load switches W Controlled Turn On which provide full protection to systems and loads which may W 0 4A 0 8A and Adjustable Current Limit Option encounter large current conditions These devices contain a P 0 230 current limited N channel MOSFET which can operate m Undervoltage Lockout over an input voltage range of 4 5 20V Switch control is by a m Thermal Shutdown logic input ON capable of interfacing directly with low voltage R 10uA Shutdown Current control signals Each part contains thermal shutdown protection W Auto Restart which shuts off the switch to prevent damage to the part when a m Fault Blanking continuous over current condition causes excessive heating When the switch current reaches the current limit the part Applications operates in a constant current mode to prohibit excessive currents from causing damage For the FPF2500 FPF2501 a PDAs FPF2503 and FPF2505 if the constant current condition still m Motor Drivers persists after 5ms these parts will shut off the switch and for m Cell Phones the FPF2503 and FPF2505 the fault signal pin FLAGB will be m Digital Cameras pulled low The FPF2500 FPF2503 and FPF2505 have an auto restart feature which will turn the switch on again after 640ms if t
3. 5 0 Vin 12V m D oo 45 4 0 0 016 1 L 1 1 n n L n n n 1 n n 1 n L 40 15 10 35 60 85 40 15 10 35 60 85 T JUNCTION TEMPERATURE C Ts JUNCTION TEMPERATURE C Figure 3 IsHurpown Current vs Temperature Figure 4 syy rcH orF Current vs Temperature 0 80 320 Vin 12V 0 75 900 s 280 0 70 2 260 Hi 0 65 9 240 Z z 220 Z 0 60 d 200 0 55 180 0 50 n i b i 1 L 160 4 6 8 10 12 14 16 18 20 40 15 10 35 60 85 Vin Input Voltage V T JUNCTION TEMPERATURE C Figure 5 ViH vs Vin Figure 6 Rony vs Temperature 5 www fairchildsemi com FPF2500 FPF2506 Rev C4 sjonpoJd 1ueureBeue y peo7 peoueApy w XVvIWIIIe1yu 90S24d4 00Sc4d3 Typical Characteristics 1400 1400 Rser 20kQ 1200 1200 FPF2505 2506 t t 1000 5 FPF2500 2501 2502 5 E Z 800 3 3 FPF2503 2504 o E 600 5 Ee S 5 5 400 200 0 if L i L L 1 i 0 L i i i 0 1 2 3 4 5 6 7 8 9 10 11 12 0 1 2 3 4 5 6 7 8 9 10 11 12 Vin 7 Vour V Vin Vour V Figure 7 Current Limit vs Output Voltage Figure 8 Current Limit vs Output Voltage 1400 1600 FPF2500 2501 2502 1300 1400 FPF2505 2506 T 1200 T 1200 110
4. and short circuit operation Using wide traces for Vin Vour and GND will help minimize parasitic electrical effects along with minimizing the case to ambient thermal impedance FPF2500 FPF2506 Rev C4 11 www fairchildsemi com sjonpoJd 1ueureBeue y peo7 peoueApy w XvIWIIe1yu 90S24d3 00Sc4d3 Dimensional Outline and Pad Layout Package MA05B LAND PATTERN RECOMMENDATION ES SEE DETAIL A ERGOE NOTES UNLESS OTHERWISE SPECIFIED A THIS PACKAGE CONFORMS TO JEDEC MO 178 ISSUE B VARIATION AA Pg SEATING PLANE GAGE PLANE DATED JANUARY 1999 gen B ALL DIMENSIONS ARE IN MILLIMETERS MAOS5BRevC DETAIL A 5 Lead SOT23 JEDEC MO 178 1 6mm Package Number MA05B 12 www fairchildsemi com FPF2500 FPF2506 Rev C4 sjonpoJd 1ueureBeue y peo7 peoueApy w XvIWIIIeyu 90S24d4 00Sc4d3 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 ACEx FAST ISOPLANAR PowerSaver SuperSOT 6 ActiveArray FASTr LittleFET PowerTrench SuperSOT 8 Bottomless FPS MICROCOUPLER QFET SyncFET Build it Now FRFET MicroFETTM QSTM TCMTM CoolFETTM GlobalOptoisolator MicroPakTM QT Optoelectronics TinyLogic CROSSVOLT GTO MICROWIRE Quiet Series TINYOPTO DOME HiSeC MSXTM RapidConfigure TruTranslation
5. 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 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 118 FPF2500 FPF2506 Rev C4 13 www fairchildsemi com sjonpoJd 1ueureBeue y peo7 peo2ueApy w XVvIWIIe1yu 90S24d3 00Sc4d3
6. 0 E 4000 2 1000 I 800 FPF2503 2504 5 900 600 5 800 400 700 200 600 0 40 15 10 35 60 85 40 15 10 35 60 85 Ts JUNCTION TEMPERATURE C Ty JUNCTION TEMPERATURE C Figure 9 Current Limit vs Temperature Figure 10 Current Limit vs Temperature 10 10 Coen 10mA oap 10mA L Voc 12V Vec v A TD o o 2 E R SS S 2 Eege d oi 9 Tease o Tee P T FALL 0 01 1 40 15 10 35 60 85 40 15 10 35 60 85 Ts JUNCTION TEMPERATURE C Ts JUNCTION TEMPERATURE C Figure 11 Tow Tog vs Temperature Figure 12 TRise TFaLL vs Temperature 6 www fairchildsemi com FPF2500 FPF2506 Rev C4 sjonpoJd 1ueureBeue y peo7 peoueApy wiXVWIIIAIU 90S24d3 00Sc4d3 Typical Characteristics E e U z E 9 5 4 m 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 L 40 15 10 35 60 85 T JUNCTION TEMPERATURE C Figure 13 TgLank VS Temperature ViN 12V VpRvs 5V DIV 10 f Vour 10V DIV lout 1A DIV FLAGB 5V DIV 5ms DIV Figure 15 TgLank Response Switch is turned on to an overcurrent condition Von Pa r 5V DIV CR JEU louT 10mA DIV 1 T Vin 12V Cin 10UF D 25000 C 21 uF Figure 17 Toy Response 800 700 o e o RESTART TIME mS 500 Vpnvs 5V DIV Vour 10V DIV lout 1A DIV FLAGB 5V DIV VoN 5V DIV lour 10mAV DIV 15 10 35 60 85 T JUNCTION TEMPERATURE C Figure 14 Tr
7. 400mA and the maximum current is 800mA and for the FPF2505 FPF2506 the minimum current is 800mA and the maximum current is 1600mA The FPF2500 FPF2501 FPF2503 and FPF2505 have a blanking time of 5ms 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 For FPF2503 and FPF2505 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 FPF2502 FPF2504 and FPF2506 have no current limit blanking period so they will remain in a constant current state For FPF2504 and FPF2506 immediately upon a current limit condition FLAGB is activated The FPF2502 FPF2504 and FPF2506 devices will remain in constant current state until the ON pin is cycled or the thermal shutdown turns off the switch 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 die from internally or externally generated excessive temperatures During an over temperature condition the switch is turned off The switch automatically turns on again if the temperature of the die drops below the threshold temperatu
8. current is internally fixed at 400 mA while that for the FPF2505 and FPF2506 is internally fixed at 800mA On Off Control The ON pin controls the state of the switch When ON is high the switch is in the on state Activating ON continuously holds the switch in the on state so long as there is no fault For all versions an under voltage on Vum 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 FPF2500 FPF2501 FPF2503 and FPF2505 The FPF2500 FPF2503 and FPF2505 have an Auto Restart feature which will automatically turn the switch on again after 640ms For the FPF2501 the ON pin must be toggled to turn on the Switch again The FPF2502 FPF2504 and FPF2506 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 under voltage lockout have not activated Ordering Information 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 FPF2500 FPF2501 and FPF2502 the current at which the parts will limit is adjustable through the selection of an external resistor connected to Isgr Information for selecting the resistor is found in the Application Info section For the FPF2503 and FPF2504 the minimum current is
9. e FPF2503 FPF2504 4 r 6 FPF2505 FPF2506 GND Pin Configuration Vour ViN GND FLAGB ISET ON SOT23 5 Vour sET GND Vour FLAGB FPF2500 FPF2506 Rev C4 www fairchildsemi com sjonpoJd 1ueureBeue y peo7 peoueApy w XvIWIIIeyu 90S24d4 00Sc4d3 Pin Description Pin Name Function 1 ViN Supply Input Input to the power switch and the supply voltage for the IC 2 GND Ground 3 ON ON Control Input 4 FLAGB Fault Output FPF2503 FPF2506 Active LO open drain output which indicates on over current supply under voltage or over temperature state ISET Adjustable Current Limit Setting Resistor FPF2500 FPF2502 An external resistor connected between this pin and ground sets the current limit value 5 Vout Switch Output Output of the power switch Absolute Maximum Ratings Parameter Min Max Unit Vin Vout to GND 0 3 20 V ON FLAGB ISET to GND 0 3 5 5 V Power Dissipation T 25 C Note 1 667 mW Operating Temperature Range 40 125 C Storage Temperature 65 150 C Thermal Resistance Junction to Ambient 150 C W Electrostatic Discharge Protection HBM 2000 V MM 200 V Recommended Operating Range Parameter Min Max Unit Vin 4 5 20 V Ambient Operating Temperature TA 40 85 C Electrical Characteristics Vin 4 5 to 20V T4 40 to 85 C unless otherwise noted Typical value
10. estart VS Temperature TRESTART 100ms DIV Figure 16 Trestart Response FPF2505 Vin t2v Cin 10UF d i D 25000 Ci 1uF 2us DIV Figure 18 Topp Response FPF2500 FPF2506 Rev C4 www fairchildsemi com sjonpoJd 1ueureBeue y peo7 peoueApy w XVvIWIIIe1yu 90S24d4 00Sc4d3 Typical Characteristics TE OESE EE UV deer Vin ViN 10V DIV 10V DIV Von 5V DIV lout 10A DIV ae lour Vour Cours uF Cin 10uF 1A DIV 2006 20us DIV Figure 19 Short Circuit Response Output is shorted to GND Note 3 VDRV signal forces the device to go into overcurrent condition 1ms DIV Figure 20 Current Limit Response Output has a 4 70 load FPF2500 FPF2506 Rev C4 www fairchildsemi com sjonpoJd 1ueureBeue y peo7 peoueApy w XVvIWITIeyu 90S24d3 00Sc4d3 Description of Operation The FPF2500 FPF2506 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 a0 280 P channel MOSFET and a controller capable of functioning over a wide input operating range of 4 5 V 20 V The controller protects against system malfunctions through current limiting under voltage lockout and thermal shutdown The current limit for FPF2500 FPF2501 and FPF2502 is adjustable from 500 mA to 2A through the selection of an external resistor The FPF2503 and FPF2504 the minimum
11. he ON pin is still active The FPF2501 does not have this auto restart feature so the switch will remain off until the ON pin is cycled For the FPF2502 FPF2504 and FPF2506 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 FPF2500 through FPF2502 the minimum current limit is adjustable from 500mA to 2A For the FPF2503 and FPF2504 the minimum current is internally fixed at 400mA while that for the FPF2505 and FPF2506 is internally fixed at 800mA These parts are available in a space saving 5 pin SOT23 package Typical Application Circuit TO LOAD Vin Vout rk FPF2500 FPF2502 D OFF ON ON ISET yes ve GND 5 5V max S 5 5V max TO LOAD e ViN Vour e FPF2503 FPF2506 E OFF ON ON FLAGB S max GND 2006 Fairchild Semiconductor Corporation 1 www fairchildsemi com FPF2500 FPF2506 Rev C4 sjonpoJd 1ueureBeue y peo7 peoueApy w XvIWIIIe1yu 90S24d3 00Sc4d3 Functional Block Diagram VIN UVLO ON CONTROL LOGIC Pt LIMIT THERMAL FPF2500 FPF2501 FPF2502 WY VIN UVLO ON CONTROL LOGIC THERMAL a
12. oltage Shutdown Hysteresis 100 mV Dynamic Turn on time ton R 500Q C 1uF 1 ms Turn off time torr R _ 5000 C 1uF 0 1 ms Vout Rise Time tn Du 5000 C 1uF 3 ms Vout Fall Time F R 5000 C 1uF 1 5 ms Over Current Blanking Time BLANK FPF2500 FPF2501 FPF2503 2 5 5 10 ms FPF2505 Auto Restart Time REsrART 1 FPF2500 FPF2503 FPF2505 320 640 1280 ms Short Circuit Response Time Vin 12V Von 5V 3 us Moderate Overcurrent Condition Note 1 Package power dissipation on 1square inch pad 2 oz copper board Note 2 Applicable only to FPF2501 Latchoff current does not include current flowing into FLAGB 4 www fairchildsemi com FPF2500 FPF2506 Rev C4 sjonpoJd 1ueureBeue y peo7 peoueApy w XVvIWIIIe1yu 90S24d3 00Sc4d3 Typical Characteristics 80 80 Von Vi ON IN 75 n Vin 20V 3 70 E 70 E Z 65 E Vin 12V d 65 60 E 60 R Vin 4 5V 9 d 50 55 45 50 40 4 6 8 10 12 14 16 18 20 40 15 10 35 60 85 SUPPLY VOLTAGE V Ty JUNCTION TEMPERATURE C Figure 1 Quiescent Current vs Input Voltage Figure 2 Quiescent Current vs Temperature 8 0 0 036 LSHDN LSVVOFF 7 5 0 032 F 70 Vin 20V E b S b 0 028 b 6o d Vin 20V o gt 55 0 024 E Vin 12V
13. pation will scale by the Auto Restart Time RESTART and the Over Current Blanking Time tg Aw SO that the maximum power dissipated is t P max BLANK x Viy max x lj jy max RESTART BLANK 5 m 5 5 5 640 20 2 5 388mW 5 This is more power than the package can dissipate but the thermal shutdown of the part will activate to protect the part from damage due to excessive heating When using the FPF2502 FPF2504 and FPF2506 attention must be given to the manual resetting of the part Continuously resetting the part when a short on the output is present will cause the temperature of the part to increase The junction temperature will only be able 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 FPF2502 FPF2504 and FPF2506 a short on the output will cause the part to operate in a constant current state dissipating a worst case power of P max Viy max x lj jy max 20x2 5 SOW 6 This large amount of power will activate the thermal shutdown and the part will 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
14. r below GND when the switch turns off For the FPF2501 FPF2503 and FPF2505 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 lj iy min x tgp ank min Cour max V IN 2 Power Dissipation Due to the wide input voltage range that the parts can accept and the high currents at which the current limit can be set care must be taken to prevent excessive power dissipation in the part from interrupting the switching of power to a load During normal operation as a switch the power dissipated in the part will depend upon the level at which the current limit is set Fora 0 5A typical load the power dissipated will typically be P luy x Rps 0 5 x 0 23 58mVV 3 This is well within the thermal capability of the package The maximum allowed setting for the current limit is 2A and this will result in a power dissipation of typically P luy Rpg 2 x 0 23 920mW 4 This is beyond the normal thermal capability of the package but the thermal shutdown within the part will prevent damage by turning off the switch once the maximum junction temperature has been reached H the part goes into current limit the maximum power dissipation will occur when the output is shorted to ground For the FPF2500 FPF2503 and FPF2505 the power dissi
15. re FPF2500 FPF2506 Rev C4 Current Limit Auto Restart Blanking Time Time Part Current Limit A ms ms Fault Pin FPF2500 Adjustable 0 5 2 0 30 2 5 5 10 320 640 1280 No FPF2501 Adjustable 0 5 2 0 30 2 5 5 10 NA No FPF2502 Adjustable 0 5 2 0 30 0 NA No FPF2503 0 4 0 6 0 8 2 5 5 10 320 640 1280 Yes FPF2504 0 4 0 6 0 8 0 NA Yes FPF2505 0 8 1 2 1 6 2 5 5 10 320 640 1280 Yes FPF2506 0 8 1 2 1 6 0 NA Yes 9 www fairchildsemi com sjonpoJd 1ueureBeue y peo7 peoueApy w XvIWIIeyu 90S24d3 00Sc4d3 Application Information Typical Application Vour FPF2500 FPF2502 ISET R2 2400 DE 5 5V max n Ja Vour FPF2503 FPF2506 ES R1 100KQ ViN A OFF ON ON Battery 12V C1 10uF 5 5V max k Vin Battery OFF ON ON 12V T po m 5 5V max C1 10uF Setting Current Limit The FPF2500 FPF2501 and FPF2502 have a current limit which is set with an external resistor connected between sEer and GND This resistor is selected by using the following equation 0 485 x larr Rser 12500 x zer xe 1 Rser is in Ohms and lsgr is in Amps The following table can also be used to select Rser A typical application would be the 0 500A current that is required by a single USB port Using the table below an appropriate selection for the Hor resistor would be 12 4KQ This will ensure that
16. s are at Vij 12V and T4 25 C Parameter Symbol Conditions Min Typ Max Units Basic Operation Operating Voltage Vin 4 5 20 V Quiescent Current lo lout OMA Viy 12V Von 5V 60 100 HA Shutdovvn Current SHDN 1 HA Latch Off Current Note 2 ILatcHorr FPF2501 45 UA On Resistance Ron T4 25 C lour 50mA 230 320 mo TA 40 to 85 C lour 50mA 300 ON Input Logic High Voltage Vin Vin 4 5V to 20V 0 9 V ON Input Logic Low Voltage Vit Vin 4 5V to 20V 0 4 V ON Input Leakage Von 5V or GND 1 1 HA Off Svvitch Leakage syyoFF Von V Vout OV 0 01 HA FLAGB Output Logic Low Voltage Vin V Isink 10mA 0 1 0 2 V FLAGB Output High Leakage Current Vin 5V Switch on 1 UA 3 www fairchildsemi com FPF2500 FPF2506 Rev C4 sjonpoJd 1ueureBeue y peo7 peoueApy w XvIWIIIeyu 90S24d3 00Sc4d3 Electrical Characteristics Cont Vin 4 5 to 20V TA 40 to 85 C unless otherwise noted Typical values are at Vij 12V and T4 25 C Parameter Symbol Conditions Min Typ Max Units Protections Current Limit LiM TA 25 C FPF2503 400 600 800 mA FPF2504 FPF2505 800 1200 1600 FPF2506 FPF2500 0 7xIlNom 1 0XlNom 1 3x NOM FPF2501 FPF2502 Thermal Shutdown Ty Increasing 140 C T Decreasing 130 C Under Voltage Shutdown UVLO Vin Increasing 3 75 3 85 4 00 V Under V
17. the port load could draw 0 525A but not more than 0 875A Likewise for a dual port system an Rser of 34 8KO would always deliver at least 1 050A and never more than 1 750A 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 Vum and GND A 0 1uF ceramic capacitor Cin placed close to the pins is usually sufficient Higher values of Cj can be used to further reduce the voltage drop FLAGB C2 1uF e s R2 2400 I Current Limit Various Rser Values Rset Min Current Typ Current Max Current KQ Limit Limit Limit A A A 7 87 0 375 0 500 0 625 10 0 0 450 0 600 0 750 12 4 0 525 0 700 0 875 14 7 0 600 0 800 1 000 17 4 0 675 0 900 1 125 20 5 0 750 1 000 1 250 23 2 0 825 1 100 1 375 26 7 0 900 1 200 1 500 30 9 0 975 1 300 1 625 34 8 1 050 1 400 1 750 39 0 1 125 1 500 1 875 43 2 1 200 1 600 2 000 48 7 1 275 1 700 2 125 53 6 1 350 1 800 2 250 29 0 1 425 1 900 2 375 64 9 1 500 2 000 2 500 FPF2500 FPF2506 Rev C4 10 www fairchildsemi com sjonpoJd 1ueureBeue y peo7 peoueApy w XVvIWIIIe1yu 90S24d4 00Sc4d3 Output Capacitor A 0 1uF capacitor Cour should be placed between Vour and GND This capacitor will prevent parasitic board inductances from forcing Vou
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FAIRCHILD SEMICONDUCTOR FPF2500 FPF2506 IntelliMAX Advanced Load Management Products Manual