FPF2165R

FPF2165R ONSEMI | Alldatasheet

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© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FPF2165R • Rev. 1.4 FPF2165R — Full Function Load Switch with Adjustable Current Limit FPF2165R Full Function Load Switch with Adjustable Current Limit

Features

 1.8 to 5.5 V Input Voltage Range  Controlled Turn-On  0.15-1.5 A Adjustable Current Limit  ±10% Current Limit Accuracy vs. Temperature  Under-Voltage Lockout (UVLO)  Thermal Shutdown  < 2 μA Shutdown Current  Fast Current limit Response Time ­ 5 μs to Moderate Over Currents ­ 30 ns to Hard Shorts  Reverse Current Blocking  RoHS Compliant

Applications

 PDAs  Cell Phones  GPS Devices  MP3 Players  Digital Cameras  Peripheral Ports  Hot Swap Supplies Related Resources  FPF2165R Product Information

Description

The FPF2165R is a load switch which provides full protection to systems and loads which may encounter large current conditions. The device contains a 0.12 Ω current-limited Pchannel MOSFET which can operate over an input voltage range of 1.8-5.5 V. 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 FPF2165R 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 (CC) mode to prohibit excessive currents from causing damage. The FPF2165R does not turn off after a current limit fault; it remains in the constant current mode indefinitely. The minimum current limit is 150 mA. The FPF2165R is available in a space-saving 6-pin 2 mm x 2 mm Molded Leadless Package (MLP). Figure 1. 2 mm x 2 mm Molded Leadless

Ordering Information

[mA] Current Limit Blanking Time [ms] Auto Restart Time [ms] On Pin Activity Top Mark FPF2165R 150-1500 0 NA Active HI 65R BOTTOM TOP Pin 1

Figure 4. Pin Assignment (Top Through View) 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.

6 ON ON Control Input

© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FPF2165R • Rev. 1.4 4 FPF2165R — Full Function Load Switch with Adjustable Current Limit Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may dama ge the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit VIN VIN, VOUT, ON, FLAGB, ISET to GND -0.3 6.0 V PD Power Dissipation 1.2 W TSTG Operating and Storage Junction Temperature -65 150 °C JA Thermal Resistance, Junction to Ambient 86 °C/W ESD Electrostatic Discharge Capability Human Body Model; JEDEC A1141 4000 V Charged Device Model; JEDEC C101C 2000 Machine Model; JEDEC A115 400 IEC 61000-4-2 Air Discharge 15000 Contact Discharge 8000 Recommended Operating Conditions The Recommended Operating Conditions table defines the condi tions for actual device operation. Recommended operating conditions are specified to ensure optimal pe rformance. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Min. Max. Unit VIN Input Voltage 1.8 5.5 V TA Ambient Operating Temperature -40 85 °C

© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FPF2165R • Rev. 1.4 5 FPF2165R — Full Function Load Switch with Adjustable Current Limit

Electrical Characteristics

Symbol Parameter Conditions Min. Typ. Max. Unit Basic Operation VIN Operating Voltage 1.8 5.5 V IQ Quiescent Current IOUT = 1 mA VIN = 1.8 V 63 100 µA VIN = 3.3 V 68 VIN = 5.5 V 77 120 RON On Resistance VIN = 3.3 V, IOUT = 200 mA, TA = 25°C 120 160 mΩ VIN = 3.3 V, IOUT = 200 mA, TA = 85°C 135 180 VIN = 3.3 V, IOUT = 200 mA, TA = -40°C to +85°C 65 180 VIN = 5 V, IOUT = 200 mA, TA = 25°C 95 124 VIN = 5 V, IOUT = 200 mA, TA = 85°C 110 143 VIN = 5 V, IOUT = 200 mA, TA = -40°C to +85°C 58 143 VIH ON Input Logic High Voltage (ON) VIN = 1.8 V 0.8 V VIN = 5.5 V 1.4 VIL ON Input Logic Low Voltage VIN = 1.8 V 0.5 V VIN = 5.5 V 1 ON Input Leakage VON = VIN or GND -1 1 μA VIN Shutdown Current VON = 0 V, VIN = 5.5 V, VOUT = Short to GND -2 2 μA FLAGB Output Logic Low Voltage VIN = 5 V, ISINK = 10 mA 0.05 0.20 V VIN = 1.8 V, ISINK = 10 mA 0.12 0.30 FLAGB Output High Leakage Current VIN = 5 V, Switch On 1 μA Reverse Block VOUT Shutdown Current VON = 0 V, VOUT = 5.5 V, VIN = Short to GND -2 2 μA Protections ILIM Current Limit VIN = 3.3 V, VOUT = 3.0 V, RSET = 1840Ù 135 150 165 mA VIN = 3.3 V, VOUT = 3.0 V, RSET = 361Ù 720 800 880 VIN = 3.3 V, VOUT = 3.0 V, RSET = 196Ù 1350 1500 1650 Thermal Shutdown Shutdown Threshold 140 °C Return from Shutdown 130 Hysteresis 10 UVLO Under-Voltage Shutdown VIN Increasing 1.55 1.65 1.75 V Under-Voltage Shutdown Hysteresis 50 mV Dynamic tdON Delay On Time RL = 500 Ω, CL = 0.1 μF 25 μs tdOFF Delay Off Time RL = 500 Ω, CL = 0.1 μF 45 μs tRISE VOUT Rise Time RL = 500 Ω, CL = 0.1 μF 10 μs tFALL VOUT Fall Time RL = 500 Ω, CL = 0.1 μF 110 μs Short-Circuit Response Time VIN = VOUT = 3.3 V, Moderate Over-Current Condition 5 μs VIN = VOUT = 3.3 V, Hard Short 30 ns Note: 1. Package power dissipation on 1square inch pad, 2 oz copper bo ard.

© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FPF2165R • Rev. 1.4 8 FPF2165R — Full Function Load Switch with Adjustable Current Limit Description of Operation The FPF2165R 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 each device is a 0.12 Ω P-channel MOSFET and a controller capable of functioning over a wide input operating range of 1.8-5.5 V. The controller protects against system malfunctions through current limiting, under-voltage lockout and thermal shutdown. The current limit is adjustable from 0.15 A to 1.5 A through the selection of an external resistor. 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 a s there is no fault. An under-voltage on V IN or a junction temperature in excess of 140°C overrides the ON control to turn off the switch. The FPF2165R 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. The ON pin control voltage and V IN pin have independent recommended operating ranges. The ON pin voltage can be driven by a voltage level higher tha n the input voltage. 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 LOW. With the FPF2165R, FLAGB is LOW 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. The current at which the parts will limit is adjustable through the selection of an external resistor connected to ISET. Information for selecting the resistor is found in the limit blanking period so it remains in a constant-curren t state until the ON pin is deactivated or the thermal shutdown turns-off the switch. For preventing the switch from large power dissipation during heavy load a short circuit detection feature is introduced. Short circuit condition is detected by observing the output voltage. The switch is put into short circuit current limiting mode if the switch is loaded with a heavy load. When the output voltage drops below VSCTH, short circuit detection threshold voltage, the current limit value re-conditioned and short circuit current limit value is decreased to 62.5% of the current limit value. This keeps the power dissipation of the part below a certain limit even at dead short conditions at 5.5 V input voltage. The VSCTH value is set to be 1 V. At around

1.1 V of output voltage the switch is removed from short

circuit current limiting mode and the current limit is set to the current limit value. 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 causes a controlled turn- on of the switch which limits current over-shoots. Reverse Current Blocking The FPF2165R family has a Reverse Current Blocking feature that protects input source against current flow from output to input. For a standard USB power design , this is an important feature that protects the USB host from being damaged due to reverse current flow on VBUS. The reverse-current blocking feature is active when the load switch is turned off. If ON pin is LOW and output voltage becomes greater than input voltage, no current can flow from the output to the input. FLAGB operation is independent of the reverse current blocking and does not report a fault condition if this feature is activated. 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.

Figure 16. Typical Application external resistor connected between ISET and GND. RSET resistor would be 570 Ω. Table 1. Current Limit Various R SET Values turned on into a large capacitive load. dissipation occurs when the output is shorted to ground.

© 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FPF2165R • Rev. 1.4 10 FPF2165R — Full Function Load Switch with Adjustable Current Limit 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 V IN, V OUT and GND h elps minimize parasitic electrical effects along with minimizing the case-to-ambient thermal impedance. The middle pad (pin 7) should be connected to the GND plate of PCB for improving thermal performance of the load switch. An improper layout could result higher junction temperature and triggering the thermal shutdown protection feature. This concern applies when the switch is set at higher current limit value and an over-current condition occurs. In this case power dissipation of the switch (P D = (V IN - V OUT) x I LIM(max)) could exceed the maximum absolute power dissipation of 1.2 W.

0.05 C 0.05 C 2.0 2.0 PIN#1 IDENT A B SIDE VIEW RECOMMENDED LAND PATTERN BOTTOM VIEW SEATING PLANE 1 3 PIN #1 IDENT 0.65 1.30 1.21 0.52(6X) 0.90 0.42(6X)0.65 2.25 1.68 (0.40) (0.70) NOTES: A. PACKAGE DOES NOT FULLY CONFORM TO JEDEC MO-229 REGISTRATION B. DIMENSIONS ARE IN MILLIMETERS. C. DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 2009. D. LAND PATTERN RECOMMENDATION IS EXISTING INDUSTRY LAND PATTERN. E. DRAWING FILENAME: MKT-MLP06Krev5. (0.20)4X

0.10 C A B

0.05 C “ (6X) (6X) (0.60) 0.08 C

0.10 C “

“ C 1.72 0.15

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