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Fairchild FPF2300 User Manual

Dual-output current limit switch
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FPF2300/02/03
Dual-Output Current Limit Switch
Features
1.8 to 5.5V Input Voltage Range
!
Typical R
= 75mΩ at IN = 5.5V
!
ON
1.3A Current Limit (Typical)
!
Slew Rate Controlled
!
Reversed Current Blocking when Disabled
!
ESD Protected, Above 4000V HBM
!
Independent Thermal Shutdown
!
UVLO
!
RoHS Compliant
!
Applications
Notebook Computing
!
Peripheral USB Ports
!
Networking / USB Based Equiptment
!
Figure 1. 8-Lead SOP

Ordering Information

Minimum
Part Number
Current
Limit
FPF2300MX
1100mA
FPF2302MX
1100mA
FPF2303MX
1100mA
FPF2300MPX
1100mA
FPF2302MPX
1100mA
FPF2303MPX
1100mA
For Fairchild's definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2009 Fairchild Semiconductor Corporation
FPF2300/02/03 • Rev. 1.1.3
Current Limit
Eco
Blanking Time
Status
10ms
RoHS
10ms
RoHS
0ms
RoHS
10ms
Green
10ms
Green
0ms
Green
Description
The FPF2300/02/03 are dual-channel load switches of
IntelliMAX™ family. The FPF2300/02/03 consist of dual,
independent, current-limited, slew rate controlled, P-
channel MOSFET power switches. Slew rated turn-on
prevents inrush current from glitching supply rails. The
input voltage range operates from 1.8V to 5.5V to fulfill
today's USB device supply requirements. Switch control
is accomplished by a logic input (ON) capable of
interfacing directly with low-voltage control signal.
For the FPF2302, if the constant current condition per-
sists after 10ms, these parts shut down the switch and
pull the fault signal pin (FLAGB) LOW. The FPF2300 has
an auto-restart feature that turns the switch on again
after 504ms if the ON pin is still active. For the FPF2303,
a current limit condition immediately pulls the fault signal
pin LOW and the part remains in the constant-current
mode until the switch current falls below the current limit.
For the FPF2300 through FPF2303, the current limit is
typically 1.3A for each switch to align with notebook
computing applications. FPF2300/02/03 is available in
both SO8 and MLP 3X3mm 8-lead packages.
Figure 2. 8-Lead MLP (3x3mm)
Auto
ON Pin
Restart
Activity
504ms
Active LOW
N/A
Active LOW
Latch Off 8-Lead SO8
Constant
N/A
Active LOW
504
Active LOW
N/A
Active LOW
Latch Off
Constant
N/A
Active LOW
June 2009
Mode
Package
Restart
8-Lead SO8
8-Lead SO8
Current
8-Lead Molded Lead-
Restart
less Package (MLP)
8-Lead Molded Lead-
less Package (MLP)
8-Lead Molded Lead-
Current
less Package (MLP)
www.fairchildsemi.com

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Summary of Contents for Fairchild FPF2300

  • Page 1: Ordering Information

    For the FPF2302, if the constant current condition per- sists after 10ms, these parts shut down the switch and pull the fault signal pin (FLAGB) LOW. The FPF2300 has an auto-restart feature that turns the switch on again after 504ms if the ON pin is still active. For the FPF2303,...

  • Page 2: Application Circuit

    Application Circuit IN = 1.8V-5.5V Functional Block Diagram UVLO © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 FPF2300/2/3 Figure 3. Typical Application CONTROL LOGIC A CURRENT LIMIT A THERMAL PROTECTION A CONTROL LOGIC B CURRENT LIMIT B THERMAL PROTECTION B Figure 4.

  • Page 3: Pin Configuration

    Fault Output A, Active LO, open drain output which indicates an over supply, UVLO FLAGB(A) and thermal shutdown. IC Substrate, which can be connected to GND for better thermal performance. Do not 9(MLP) Thermal Pad connect to other pins. © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 FLAGB(A) FLAGB(A) OUTA OUTB FLAGB(B) FLAGB(B) Figure 5.

  • Page 4: Absolute Maximum Ratings

    Recommended Operating Range The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings.

  • Page 5: Electrical Characteristics

    Current Limit Response Time Note: FPF2303 has a 10ms startup FLAGB blanking time when the part is turned on via the ON pin to ensure transient load currents settle. © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 Conditions IN = 5.5V, V = 5.5V, IN = 5.5V...

  • Page 6: Typical Characteristics

    0.50 0.00 , JUNCTIO N TEM PERA TURE (°C) Figure 9. IN Shutdown Current vs. Temperature SUPPLY VOLTA GE (V) Figure 11. R vs. Temperature (SO8) © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 70.00 60.00 50.00 25°C 40.00 -40°C...
  • Page 7 1260 1250 SUPPLY VO LTA G E (V) Figure 17. Current Limit vs. Supply Voltage © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 = 25°C Figure 14. ON Threshold Voltage vs. Supply Voltage Figure 16. ON Low Voltage vs. Temperature 1350 IN = 3.3V...
  • Page 8 520.0 500.0 , JUNCTIO N TEM PERA TURE (°C) Figure 23. t vs. Temperature RSTRT © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 IN = 3.3V = 500 O hm s DO N = 0.1 uF IN = 3.3V...
  • Page 9 FPF2300/02/03 • Rev. 1.1.3 2V/DIV FLAGB 2V/DIV IN = 5V 1A/DIV ON = 3.3V = 0.1μF = 500Ω 5V/DIV Response Figure 26. Over-Current Blanking Time (FPF2300/2) = 10μF = 3.3Ω 2V/DIV FLAGB 2V/DIV 1A/DIV 5V/DIV IN = 5V 5V/DIV ON = 3.3V = 5Ω...
  • Page 10 Channels are in OC 5V/DIV 5V/DIV 500mA/DIV 5V/DIV 1ms/DIV Figure 33. Inrush Response During Capacitive Load Hot Plug-In Event © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 IN = 5V 5V/DIV ON = 3.3V = 100μF OUTA = 100μF...

  • Page 11: Description Of Operation

    (FLAGB) output. If the over-current condition persists beyond the blanking time, the FPF2300 pulls the FLAGB pin LOW and shuts the switch off. If the ON pin is kept active, an auto-restart feature releases the FLAGB pin and turns the switch on again after a 504ms auto-restart time ).
  • Page 12 This capacitor should have a low dissipation factor. An X7R MLCC (Multilayer Ceramic Chip) capacitors is recommended. For the FPF2300 and FPF2302, the total output capacitance needs to be kept below a maximum value, C prevent the part from registering an over-current condition beyond the blanking time and shutdown.

  • Page 13: Application Information

    In Figure 39, each USB port is connected with each output. Four USB ports can be implemented with two FPF230X parts. Current limiting and control are provided based on a single port. © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 10KΩ...
  • Page 14 If the part goes into current limit, the maximum power dissipation occurs when the output of switch is shorted to ground. For the FPF2300 the power dissipation scales with the auto-restart time, t . In this case, the maximum power dissipated for the...

  • Page 15: Pcb Layout Recommendations

    Placing the input and output capacitors as close to the device as possible also contributes to heat dissipation, particularly during high load currents. © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 ) could exceed the LIM(MAX) Figure 42.
  • Page 16 Figure 43. Top, SST and AST Layers (MLP 3x3mm and SO8) Releated Resources FPF2300/02/03 Evaluation Board User Guide; Power Switch for USB Applications © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 Figure 44. Bottom and ASB Layers Figure 45.
  • Page 17 Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products.
  • Page 18 Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products.
  • Page 19 Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's full range of up-to-date technical and product information.

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