PI5PD2051B PERICOM | Alldatasheet
Document overview
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Technical content
Features
70mΩ High-Side MOSFET 0.5A Continuous Current Thermal and Short-Circuit Protection Accurate Current Limit (1.0A typ.) Operating Range: 2.7V to 5.5V 0.6ms Typical Rise Time Under-Voltage Lockout Deglitched Fault Report (/OC) 1μA Maximum Standby Supply Current Reverse Current Blocking Ambient Temperature Range: -40° C to 85° C UL Recognized, File Number E341484
Applications
Laptop, Motherboard PC USB Bus/Self Powered Hubs TV and Set-top BOX Power switch USB Peripherals Battery-Powered Equipment Hot-Plug Power Supplies Pin Configuration GND IN /EN/OC OUT 1 PT7M2601/PT7M2065 DBV PACKAGE (TOP VIEW) GND IN IN */EN /OC OUT OUT OUT o 4 5 PT7M2061/PT7M2065 D AND DGN PACKAGE (TOP VIEW) o D AND DGN PACKAGE (TOP VIEW) GND IN */EN1 */EN2 /OC2 OUT2 OUT1 /OC11 4 5
8 GND
o 4 5 PT7M2065-1 DGN PACKAGE (TOP VIEW) PI5PD2041B SOT23-5 (Top View) GND IN EN/OC OUT 1 PT7M2601/PT7M2065 DBV PACKAGE (TOP VIEW) GND IN IN */EN /OC OUT OUT OUT o 4 5 PT7M2061/PT7M2065 D AND DGN PACKAGE (TOP VIEW) o D AND DGN PACKAGE (TOP VIEW) GND IN */EN1 */EN2 /OC2 OUT2 OUT1 /OC11 4 5 o 4 5 PT7M2065-1 DGN PACKAGE (TOP VIEW) PI5PD2051B SOT23-5 (Top View)
Description
The PI5PD2041B/51B is an integrated 70mΩ N-channel MOSFET power switches for self-powered and bus- powered Universal Series Bus (USB) applications. The devices are equipped with charge pump circuitry to drive the internal MOSFET switch. The switch’s low RDS(on), 70mΩ meets USB voltage drop req uirements. This power-distribution switch is designed to set current limit at 1.0A typically. When the output load exceeds the current-limit threshold or a short -circuit situation is present, the device s limit the output current by switching into a constan t-current mode, pulling the over -current ( /OC) logic output low. When continuous heavy overloads and short -circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit turns off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains off until valid input voltage is present.. Pin Description Pin No. Pin Type Description 2 GND - Ground. 5 IN I Power Input Voltage. 4 /EN (PI5PD2041B) I Chip Enable, logic low turns on power switch. 4 EN (PI5PD2051B) I Chip Enable, logic high turns on power switch. 3 /OC O Over current, open-drain output, active-low.
1 OUT O Power Output Voltage
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches Functional Block Diagram Note A: Current sense Note B: Active low (/EN) for PI5PD2041B; Active high (EN) for PI5PD2051B Maximum Ratings Input Voltage range ( VI (I N) Output Voltage range ( VO (OUT) Recommended Operating Conditions Symbol Description Min Type Max Unit VI (I N) Input Voltage 2.7 - 5.5 V VI(/EN), VI(EN) Input Voltage 0 - 5.5 V IO(OUT) Continuous Output Current 0 - 0.5 A TJ Operating Virtual Junction Temperature Range -40 - 125 ºC Note: (1)Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other con ditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. (2)All voltages are with respect to GND.
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches
Electrical Characteristics
Unless otherwise specified, VI(IN) = 5.5V, IO = 0.5A, VI(/EN) = 0V, VI(EN) = 5.5V. Sym Description Test Conditions(1) Min Typ Max Unit Power Switch RDS(on) Static drain-source on-state resistance, 5V operation and 3.3V operation VI(IN) = 5V or 3.3V, IO = 0.5A, -40° C ≤TJ≤ 125°C - 70 135 mΩ Static drain-source on-state resistance, 2.7V operation(2) VI(IN) = 2.7V, IO = 0.5A, -40° C ≤TJ ≤ 125° C - 75 150 mΩ tr (2) Rise time, output VI(IN) = 5.5V CL=1F, RL=10Ω, T J =25° C - 0.6 1.5 ms VI(IN) = 2.7V - 0.4 1 tf (2) Fall time, output VI(IN) = 5.5V 0.05 - 0.5 Enable Input /EN or EN II Input current VI(/EN) = 0 V or 5.5 V -0.5 - 0.5 A ton (2) Turn on time CL = 100F, RL = 10Ω - - 3 ms toff (2) Turn off time CL = 100F, RL = 10Ω - - 10 Current Limit IOS Short-circuit output current VI(IN) =5V, OUT connected to GND, device enabled into short-circuit TJ =25° C 0.75 1 1.25 A -40° C ≤TJ ≤ 125° C 0.7 1 1.3 IOC-TRIP Over-current trip threshold VI(IN)=5V, current ramp ( ≤100 A/s ) on OUT 1.1 1.5 2.5 A Supply Current ISTB Input supply current at output disable No load on OUT, VI(/EN)= 5.5V, or VI(EN)=0V TJ =25° C - 0.1 - -40° C ≤TJ ≤ 125° C - 0.2 - ISS Input supply current at output enable No load on OUT, VI(/EN) = 0V, or VI(EN) = 5.5V TA=25° C - 43 - -40° C ≤TJ ≤ 125° C - 43 - Leakage current OUT connected to ground, V I(/EN) = 5.5V, or VI(EN) = 0V -40° C ≤TJ ≤ 125° C - 1 - Reverse leakage current VI(OUT)=5.5V, IN = ground(2) TJ =25° C - 0.1 - Under-voltage Lockout Low-level input voltage, IN - 2 - 2.5 V Hysteresis, IN TJ =25° C - 75 - mV Over-current /OC Output low voltage, VOL(/OC) IO(/OC) = 5mA - - 0.4 V Off-state current(2) VO(/OC) = 5V or 3.3V - - 1 A /OC deglitch(2) /OC assertion or de-assertion 4 12 15 ms Thermal Shutdown(3) Thermal shutdown threshold(2) - 135 - - °C Recovery from thermal shutdown(2) - 125 - - °C Hysteresis(2) - - 10 - °C Note: (1) Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately. (2) Not tested in production, specified by design. (3) The thermal shutdown only reacts under over current conditions.
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches Typical Performance and Characteristics 1. Turn On Delay and Rise Time PI5PD2041B RL=5Ω, CL=1µF, TA=25℃ PI5PD2041B RL=5Ω, CL=1µF, TA=25℃ PI5PD2041B RL=5Ω, CL=100µF, TA=25℃ PI5PD2041B RL=5Ω, CL=100µF, TA=25℃ VI(/EN) 5V/Div VO(OUT) 2V/Div Time (200µs/Div) VI(/EN) 5V/Div VO(OUT) 2V/Div Time (200µs/Div) VI(/EN) 5V/Div VO(OUT) 2V/Div Time (200µs/Div) VI(/EN) 5V/Div VO(OUT) 2V/Div Time (400µs/Div)
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches 2. Over Current /OC Response PI5PD2041B TA=25℃, RL=2Ω, CL=0.1µF 3. Output Short to Ground Then Enable PI5PD2041B TA=25℃ 4. Inrush Current PI5PD2041B TA=25℃, VI(IN)=5V, RL=10Ω VI(/EN) 5V/Div IO(OUT) 0.5A/Div Time (200µs/Div) VO(/OC) 5V/Div IO(OUT) 0.5A/Div Time (2ms/Div) IO(OUT) 0.5A/Div VI(/EN) 5V/Div Time (1ms/Div)
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches 5. Turn On/Off Time vs. Input Voltage Turn On time RL=5Ω, CL=100µF, TA=25℃ 400 500 600 700 800 2 3 4 5 6 Input Voltage (V) Turn On Time (µ s) Turn Off time RL=5Ω, CL=100µF, TA=25℃ 200 400 600 800 2 3 4 5 6 Input Voltage (V) Turn Off Time (µ s) 6. Rise and Fall Time vs. Input Voltage Rise Time RL=5Ω, CL=1µF, TA=25℃ 200 400 600 800 2 3 4 5 6 Input Voltage (V) Rise Time (µ s) Fall Time RL=5Ω, CL=1µF, TA=25℃ 100 200 300 400 2 3 4 5 6 Input Voltage (V) Fall Time (µ s)
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches 7. Input Supply Current vs. Ambient Temperature Output Enable, TA=25℃ -50 0 50 100 150 Ambient Temperature( ℃) OUT Enable Supply Current (µ A) Vin=5.5V Vin=5V Vin=3.3V Vin=2.7V Output Disable, TA=25℃ 120 160 200 -50 0 50 100 150 Ambient Temperature ( ℃) OUT Disable Supply Current (nA) Vin=5.5V Vin=5V Vin=3.3V Vin=2.7V 8. Static Drain-source On Resistance vs. Ambient Temperature 100 -50 0 50 100 150 Ambient Temperature( ℃) On Resistance (mΩ) Vin=5V Vin=3.3V Vin=2.7V
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches 9. Current Limit vs. Ambient Temperature Threshold Trip Current vs. Input Voltage 2 3 4 5 6 Input Voltage (V) Threshold Trip Current (A) Short-Circuit Output Current vs. Ambient Temperature 0.0 0.2 0.4 0.6 0.8 1.0 1.2 -50 0 50 100 150 Ambient Tenperature ( ℃) Short Circuit Current (A) Vin=5.5V Vin=5V Vin=3.3V Vin=2.7V
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches Under-Voltage Lockout (UVLO) A voltage sense circuit monitors the input voltage , an under voltage lockout ensures that the power switch is in the off state at power up. When the input voltage is below approximately 2V, a control signal turns off the power switch. Power Dissipation Calculation The low RDS(on) resistance on the N-channel MOSFET allows the small surface-mount packages to pass large currents. The thermal resistances of these packages are high compared to those of power packages. Begin by determining the RDS(on) of the N -channel MOSFET relative to the input voltage and operating temperature. Using this value, the power dissipation per switch can be calculated by:
- PD = RDS(on)× I Multiply this number by the number of switches being used. This step renders the total power dissipation from the N -channel MOSFET. Finally, calculate the junction temperature:
- TJ = PD x RθJA + TA Where:
- TA= Ambient temperature ° C
- RθJA = Thermal resistance
- PD = Total power dissipation based on number of switches being used. Thermal Protection Thermal protection prevents damage to the IC when heavy -overload or short-circuit faults are present for extended periods of time. The PI5PD20 41B/51B implements a thermal protection circuitry to monitor the operating junction temperature of the power distribution switch. In an over current or short-circuit condition cause to the junction temperature rises, when the die temperature rises to approximately 1 35° C due to over current conditions, the internal thermal protection circuitry turns off the switch, thus preventing the device from damage. Hysteresis is built into the thermal protection ci rcuitry, and after the device has cooled approximately 10 degrees, the switch turns back on. The switch continues to cycle off and on until the fault is removed. The open- drain false reporting output (/OC) is asserted (active low) when an over temperature shutdown or over current occurs. Universal Serial Bus (USB) Application The universal serial bus (USB) interface is a 480Mb/s or 12Mb/s, multiplexed serial bus designed for low -to-medium bandwidth PC peripherals (e.g., keyboards, printers, scanners, and mice). The four -wire USB interface is conceived for dynamic attach - detach (hot plug -unplug) of peripherals. Two lines are provided for differential data, and two lines are provided for 5V power distribution. USB data is a 3.3V level signal, but power is d istributed at 5V to allow for voltage drops in cases where power is distributed through more than one hub across long cables. Each function must provide its own regulated 3.3V from the 5V input or its own internal power supply. The USB specification defines the following five classes of devices, each differentiated by power-consumption requirements:
- Hosts/self-powered hubs (SPH)
- Bus-powered hubs (BPH)
- Low-power, bus-powered functions
- High-power, bus-powered functions
- Self-powered functions SPHs and BPHs distribute data and power to downstream functions. The PI5PD20 41B/51B has higher current capability than required by one USB port; so, it can be used on the host side and supplies power to multiple downstream ports or functions. Host/Self-Powered and Bus-Powered Hubs Hosts and SPHs have a local power supply that powers the embedded functions and the downstream ports ( see Figure 3) . This power supply must provide from 5.25V to 4.75V to the board side of the downstream connection under full -load and no -load conditions. Hosts and SPHs are required to have current -limit protection and must report over current conditions to the USB controller. Typical SPHs are desktop PCs, monitors, printers, and stand-alone hubs.
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches Figure 3 Typical One-Port USB Host/Self-Powered Hub BPHs obtain all power from upstream ports and often contain an embedded function. The hubs are required to power up with less than one unit load. The BPH usually has one embedded function, and power is a lways available to the controller of the hub. If the embedded function and hub require more than 100mA on power up, the power to the embedded function may need to be kept off until enumeration is completed. This can be accomplished by removing power or by shutting off the clock to the embedded function. Power switching the embedded function is not necessary if the aggregate power draw for the function and controller is less than one unit load. The total current drawn by the bus -powered device is the sum of the current to the controller, the embedded function, and the downstream ports, and it is limited to 500mA from an upstream port. IN /EN /OC GND OUT 0.1µF 120µF 0.1µF POWER SUPPLY 3.3V 5V PI5PD2041B Vbus GND USB Controller Downstream USB Ports
2013-07-0009 PT0317-5 07/31/13 PI5PD2041B/51B 70mΩ Current-Limited, Power-Distribution Switches Mechanical Information TAE(Lead free and Green SOT23-5)
Ordering Information
Part Number Package Code Package PI5PD2041BTAE TA Lead free and Green 5-Pin SOT23 PI5PD2051BTAE TA Lead free and Green 5-Pin SOT23 Notes: E = Pb-free and Green Adding X Suffix= Tape/Reel Function comparison table Part Number Enable Recommended maximum continuous load current Typical short circuit current limit at 25ºC Number of switch PI5PD2041B Active Low 0.5A 1A Single PI5PD2051B Active High Single Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom.