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FPF2300/02/03 — Dual-Output Current Limit Switch

June 2009

FPF2300/02/03 • Rev. 1.1.3

FPF2300/02/03

Dual-Output Current Limit Switch

Features

! 1.8 to 5.5V Input Voltage Range

! Typical R

= 75mΩ at IN = 5.5V

! 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

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 1. 8-Lead SOP Figure 2. 8-Lead MLP (3x3mm)

Ordering Information

For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

Part Number

Minimum

Current

Limit

Current Limit

Blanking Time

Eco

Status

Auto

Restart

ON Pin

Activity

Mode Package

FPF2300MX 1100mA 10ms RoHS 504ms Active LOW Restart 8-Lead SO8

FPF2302MX 1100mA 10ms RoHS N/A Active LOW Latch Off 8-Lead SO8

FPF2303MX 1100mA 0ms RoHS N/A Active LOW

Constant

Current

8-Lead SO8

FPF2300MPX 1100mA 10ms Green 504 Active LOW Restart

8-Lead Molded Lead-

less Package (MLP)

FPF2302MPX 1100mA 10ms Green N/A Active LOW Latch Off

8-Lead Molded Lead-

less Package (MLP)

FPF2303MPX 1100mA 0ms Green N/A Active LOW

Constant

Current

8-Lead Molded Lead-

less Package (MLP)

Summary of content (19 pages)

PAGE 1
FPF2300/02/03 Dual-Output Current Limit Switch Features Description ! 1.8 to 5.5V Input Voltage Range 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, Pchannel 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.
PAGE 2
FLAGB(A) IN IN = 1.8V-5.5V CIN FLAGB(B) FPF2300/2/3 OFF ON ONA OFF ON ONB GND OUTA TO LOAD A OUTB TO LOAD B COUTB COUTA Figure 3. Typical Application Functional Block Diagram IN UVLO ONA REVERSE CURRENT BLOCKING CONTROL LOGIC A CURRENT LIMIT A OUTA THERMAL PROTECTION A FLAGB(A) ONB REVERSE CURRENT BLOCKING CONTROL LOGIC B CURRENT LIMIT B OUTB THERMAL PROTECTION B FLAGB(B) GND Figure 4. Block Diagram © 2009 Fairchild Semiconductor Corporation FPF2300/02/03 • Rev. 1.1.3 www.
PAGE 3
FPF2300/02/03 — Dual-Output Current Limit Switch Pin Configuration GND 1 8 FLAGB(A) IN 2 7 OUTA FLAGB(A) 8 OUTA 7 1 GND 2 IN ONA 9 ONA 3 6 OUTB ONB 4 5 FLAGB(B) SO8 OUTB 6 3 FLAGB(B) 5 4 ONB MLP 3X3mm 8-Lead Bottom View Figure 5. Pin Configurations Pin Description Pin # Name Function 1 GND 2 IN 3 ONA ON / OFF control input of power switch A. Active LOW 4 ONB ON / OFF control input of power switch B.
PAGE 4
Stresses exceeding the absolute maximum ratings may damage 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 IN, OUTA, OUTB, ONA, ONB, FLAGB(A), FLAGB(B) to GND Min. Max. Unit -0.3 6.0 V 0.8(1) SO8 PD 1.
PAGE 5
IN = 1.8 to 5.5V, TA = -40 to +85°C unless otherwise noted. Typical values are at IN = 3.3V and TA = 25°C. Symbol Parameter Conditions Min. Typ. Max. Units Basic Operation VIN Operating Voltage IQ Quiescent Current IN = 5.5V, VONA = VONB = 0V, IOUT = 0mA 1.8 ISD IN Shutdown Current VONA = VONB = 5.5V, IN = 5.5V OUTA = OUTB = Short to GND, RON On Resistance VIH ON Input Logic High Voltage (ON) VIL ON Input Logic Low Voltage ION ON Input Leakage IN = 5.
PAGE 6
70.00 70.00 ONA = ONB = 0V ONA = ONB = 0V 60.00 85°C 50.00 IQ CURRENT (uA) SUPPLY CURRENT (uA) 60.00 25°C 40.00 -40°C 30.00 20.00 10.00 0.00 1.8 IN = 5.5V 50.00 40.00 IN = 3.3V 30.00 IN = 1.8V 20.00 10.00 2.2 2.5 2.9 3.3 3.7 4.0 4.4 4.8 5.1 0.00 -40 5.5 SUPPLY VOLTAGE (V) -15 10 35 60 85 TJ, JUNCTION TEMPERATURE (°C) Figure 7. Quiescent Current vs. Supply Voltage Figure 8. Quiescent Current vs. Temperature 160 IN = ONA = ONB = 5.5V OUT = 0V 4.
PAGE 7
ON RESISTANCE (mOhm) 85 1.5 IN = 5.5V IOUT = 200mA ONA = ONB = 0V TA = 25°C ON THRESHOLD VOLTAGE (V) 90 80 75 RON B 70 65 RON A 60 55 50 -40 1.3 VIL 1.0 0.8 VIH 0.5 0.3 0.0 -15 10 35 60 85 1.8 2.2 2.5 2.9 TJ, JUNCTION TEMPERATURE (°C) Figure 13. RON vs. Temperature (SO8) 4.0 4.4 4.8 5.1 5.5 1.2 IN = 5.5V ON THRESHOLD VOLTAGE (V) ON THRESHOLD VOLTAGE (V) 3.7 Figure 14. ON Threshold Voltage vs. Supply Voltage 1.2 1.0 IN = 3.3V 0.8 IN = 1.8V 0.6 0.4 0.2 0.
PAGE 8
20 18 IN = 3.3V RL = 500 Ohms CL = 0.1 uF tDON 100 10 16 RISE/FALL TIME (us) TURN ON/OFF DELAY TIME (us) 1000 IN = 3.3V RL = 500 Ohms tDOFF 14 IN = 3.3V RL = 500 Ohms CL = 0.1 uF tF IN = 3.3V RL = 500 Ohms 12 10 8 6 4 2 1 -40 -15 10 35 60 0 -40 85 -15 FPF2300/2 IN = 3.3V ONA = ONB = 0V 10.5 10.0 FLAGB(B) 9.5 FLAGB(A) 9.0 8.5 8.0 7.5 7.0 -40 -15 10 35 35 60 85 Figure 20. tRISE / tFALL vs. Temperature STARTUP FLAGB BLANKING TIME (ms) Figure 19. tDON / tDOFF vs.
PAGE 9
IN 2V/DIV ON 2V/DIV ON 2V/DIV FLAGB 2V/DIV tBLANK IOUT 1A/DIV IN = 5V ON = 3.3V COUT = 0.1μF RL = 500Ω OUT 2V/DIV IN = 5V COUT = 10μF RL = 2.8Ω OUT 5V/DIV 2ms/DIV 200μs/DIV Figure 25. tOFF Response Figure 26. Over-Current Blanking Time (FPF2300/2) COUT = 10μF RL = 3.3Ω ON 2V/DIV ON 2V/DIV tSTART_BLANK FLAGB 2V/DIV tRSTRT FLAGB 2V/DIV IOUT 1A/DIV IOUT 1A/DIV OUT 2V/DIV OUT 5V/DIV IN = 5V COUT = 10μF RL = 2.8Ω 100ms/DIV 2ms/DIV Figure 28. Auto-Restart Time (FPF2300) Figure 27.
PAGE 10
IN 5V/DIV IN 5V/DIV IN = 5V ON = 3.3V COUTA = 100μF COUTB = 100μF RLA = RLB = 1Ω ON 2V/DIV ON 2V/DIV OUTA 2V/DIV FLAGB(A) 2V/DIV OUTB 2V/DIV FLAGB(B) 2V/DIV 10ms/DIV 400μs/DIV Figure 32. Startup FLAGB Blanking Time Figure 31. Current Limit Response Time Both Channels are in OC IN 5V/DIV IN 5V/DIV IN = 5V COUT = 47μF CL = 470μF RL = 5Ω ON 5V/DIV IN = 5V CIN = 10μF COUT = 100μF CL = 47μF ON 5V/DIV IOUT 500mA/DIV IOUT 2A/DIV OUT 5V/DIV OUT 5V/DIV 200μs/DIV 1ms/DIV Figure 33.
PAGE 11
The FPF2300, FPF2302, and FPF2303 are dual-output currentlimit switches designed to meet notebook computer, peripheral USB port, and point-of-load (POL) application power requirements. Dual-output current can be used where dual or quad USB ports are powered by hosts or self-powered hubs. The FPF230X family offers control and protection while providing optimum operation current for a safe design practice. The core of each switch is a typical 75mΩ (IN = 5.
PAGE 12
If output of both switches are connected together and an excessive load current activates thermal protection of both, the controller can shut down the switches after both FLAGB outputs go LOW and turn on both channels again. This provides simultaneous switch turn on. Thermal protection is for device protection and should not be used as regular operation.
PAGE 13
10KΩ 10KΩ 33μF Host 5V FLAGB(A) IN FLAGB(B) FPF2300/2/3 1μF OFF ON ONA OFF ON ONB 33μF Downstream USB Port Downstream USB Port OUTA GND OUTB 33μF 33μF Downstream USB Port Downstream USB Port Figure 38. Self Powered 4-Port USB Hub Using a Single FPF230X capability per port required in actual power designs. FPF230X has 1.1A minimum current limit per output, which can cover two ports, as shown in Figure 38.
PAGE 14
10KΩ Host 5V FLAGB(A) IN FLAGB(B) FPF2300/2/3 1μF OFF ON ONA OFF ON ONB OUTA GND OUTB 33μF Downstream USB Port Figure 40. Self-Powered USB Port for High Current Demand High current, over 2A, is sometimes required to supply enough power to downstream functions. As shown in Figure 40, a 2.2A minimum load current can be achieved by tying dual outputs together.
PAGE 15
For the 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 shortcircuit operation. Using wide traces for IN, OUTs, and GND pins helps minimize parasitic electrical effects and the case-toambient thermal impedance.
PAGE 16
The FPF230X evaluation board has components and circuitry to demonstrate FPF2300/2/3 load switch functions and features, accommodating both the MLP 3x3mm and SO8 packages. The state of the each channel can be configured using J1 and J2 jumpers. In addition, both channels can be controlled by ONA and ONB test pints. Thermal performance of the board is improved using techniques in the layout recommendations section.
PAGE 17
FPF2300/02/03 — Dual-Output Current Limit Switch Dimensional Outline and Pad Layout Figure 46. 8-Lead SO8 Package 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.
PAGE 18
FPF2300/02/03 — Dual-Output Current Limit Switch Dimensional Outline and Pad Layout Figure 47. 8-Lead Molded Leadless Package (MLP) 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.
PAGE 19
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