SP619EK-L/TR

SP619 High Current Power Switch FEATURES • Max Rds(on) .377 Ohms • Overcurrent deactivation 800mA • Max leakage current less than 2µA while deactivated • Small 6 pin SOT-23 package • Built-in Over-temperature Protection • 4.5V to 5.5V Input voltage range 6 5 4 SP619 SOT23-6 APPLICATIONS • Ultra low cost handsets • PDA, DSC, MP3 players • Cell phones • Power Distribution Switch • Battery-Charger Circuit 1 2 3 DESCRIPTION The SP619 is a low RDS(ON) high current switch designed with precision cur­rent limiting to protect connected devices from damage due to a short circuit con­dition or against current surges that may cause the supply voltages to fall out of regulation. This switch is functional over an input voltage range of 2.5V to 7V, but is targeted at 5V applications. The SP619 is also protected from thermal overload which limits power dissipation. In shutdown mode, the supply current drops to 2µA. TYPICAL APPLICATION CIRCUIT Vin SP619 Vout Vin 100K Cin .1µF Cout .1µF LOAD EN ON/OFF 80K Aug24-17 Rev M GND SP619 High Current Power Switch 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Vin……….…………………………….….…-0.3V to 7V Storage Temperature..…....……….… -65°C to 150°C Junction Temperature..................... ……..…….150°C Lead Temperature (Soldering, 10 sec)......…….300°C ESD RATING Human Body Model……………………….…….2000V Machine Model…………………………………....200V OPERATING RATINGS Thermal resistance SOT23-6 Junction to Ambient……………………….….….191°C Junction to lead ……………………...……………50°C RECOMMENDED OPERATING CONDITIONS Unless otherwise specified: Vin = 4.5V - 5.5V, Cin = 0.1µF, Ta = -10°C to + 85°C PARAMETER CONDITIONS MIN Operating Input Voltage Range TYP (Note 1) 4.5 Overcurrent Deactivation Range EN=1.5V 620 Overcurrent Duration Before Deactivation EN=1.5V 1 800 MAX UNITS 5.5 V 1010 mA 5.25 ms Shutdown Supply Current Vin=4.5V 2 µA Quiescent Supply Current EN=1.5V Vin=4.5V Iout=0mA 350 µA Quiescent Supply Current EN=1.5V Vin=4.5V Iout=725mA 5.25 mA Vin=4.5V Iout=100mA EN=1.5V .377 Ω 23 KΩ 55 ms Rds(on) Post Fault Output Load for Recovery Enable=1.5V 10 Post Fault Activation Turn On Time Enable=1.5V 1 SP619 will self recover when temperature drops below the trip point . 120 150 180 °C 90 120 135 °C Thermal Shutdown Die Temperature Thermal Restart Die Temperature ENABLE Logic LOW ENABLE Pin Logic HIGH Driver is disabled Driver is active .655 15 .5 V 1.4 V Turn On Delay Rl=100kΩ, Cl= 0.01µF (Note 2,3) 600 µs Turn Off Delay Rl=100kΩ, Cl= 0.01µF (Note 2,4) 200 µs Rise Time Rl=100kΩ, Cl= 0.01µF (Note 2) 100 µs Fall Time Rl=100kΩ, Cl= 0.01µF (Note 2) 2500 µs Note 1: Typicals are Tj=25°C Note 2: Characterized, not 100% tested Note 3: Turn on delay is measured from the time the enable pin is turned on to the time it takes the output to rise to 10% of its final value. Note 4: Turn off delay is measured from the time the enable pin is turned to the time it takes for the output to fall to 90% of its current value. Aug24-17 Rev M SP619 High Current Power Switch 2 FAULT AND RECOVERY TRUTH TABLE* Enable Load Temperature (TJ) Previous State Switch Current State/Fault (Note*) Low X X X Open Off High < 800 mA < 163ºC Off Closed Normal High < 800 mA > 163ºC Off Open Thermal Cutoff High > 800 mA < 163ºC Off Open Overcurrent High > 800 mA > 163ºC Off Open Thermal Cutoff, Overcurrent High < 15kΩ < 163ºC Overcurrent Open Load Condition High < 15kΩ > 163ºC Overcurrent Open Thermal Cutoff, Overcurrent, Load Condition High > 15kΩ < 163ºC Overcurrent Closed Normal High > 15kΩ > 163ºC Overcurrent Open Thermal Cutoff High < 15kΩ < 120ºC Thermal Cutoff Open Load Condition High < 15kΩ > 120ºC Thermal Cutoff Open Load Condition, Thermal Cutoff High > 15kΩ < 120ºC Thermal Cutoff Closed Normal High > 15kΩ > 120ºC Thermal Cutoff Open Thermal Cutoff *Note: This table is for fault conditions, not for continuous operation, else damage to the device may occur. In order to recover to the normal state after a Thermal Cutoff fault, the part’s junction temperature must decrease below 120ºC and the load on its output must be greater than 15kΩ. PIN ASSIGNMENTS PIN NUMBER PIN NAME FUNCTION 1 Vin Input power supply pin (4.5V to 5.5V) 2 GND Ground connection 3 Enable A logic high turns on the switch 4 NC No connect 5 NC No connect 6 Vout Switch output Aug24-17 Rev M SP619 High Current Power Switch 3 THEORY OF OPERATION The SP619 is a switch capable of handling up to 800mA of current. inrush current that can be encountered. At 6 volts in, the inrush current was about 250mA into a 100µF capacitor. The SP619 is targeted as a 5V USB protection power distribution switch. And can be used in general power distribution applications where short circuits are likely to be encountered. Output Voltage Rise Time The output voltage of the SP619 has an output capacitance dependency on the slope of Vout. A simple RC circuit is created when the switch is turned on. Equation 1 Short circuit operation When the SP619 enters a short circuit condition, the switch is disabled. The output of the SP619 will not restart until the output impedance is greater than 15KΩ. The enable pin can be used to re-enable the SP619 into any load condition that is not a fault condition. Refer to the truth table on page 4 for more information on the different SP619 switch states. The typical deactivation time is about 2ms. ( V(t)=Vo+Vin -t Rds(on) • Cout 1-e ( Where Vo is initial Voltage condition typically 0V Vin is the input voltage Rds(on) is the switch resistance Cout is the output capacitance For 4.2V Vin and 100µF output capacitance we get about 150ns delay in figure 2. Enable The enable pin allows easy control of the SP619. The enable pin should not be enabled high prior to a voltage being present on the input of the device. The enable pin should not exceed the input voltage by more than 0.1V due to an internal ESD diode. Doing so will affect the operation of the SP619 and could damage the device. In a typical application an 80KΩ resistor to GND should be used on the enable pin. This resistor will pull the enable low when an enable signal is not present. This prevents the SP619 from falsely turning on. The enable pin can also be used to restart the part into a load condition that is high in current. Please refer to the truth table on page 4 for more details. 4.17 3.33 VOUT 2.5 1.67 0.83 0 0 0.33 0.67 1 time in uS 1.33 1.67 2 This is comparable to actual measured value in figure 3. Inrush Current The SP619 is a simple resistive switch. When the switch is turned on into a highly capacitive load there could be a significant Aug24-17 Rev M SP619 High Current Power Switch 4 THEORY OF OPERATION Overtemperature Protection The SP619 has built-in overtemperature protection to protect the part against damage if the die temperature gets too hot. The typical thermal cutoff is about 150ºC. The part will self recover if the temperature drops below the thermal restart threshold of about 120ºC. Layout Considerations The input and output decoupling capacitors should be placed as close as possible to the input and output pins. The GND pin should be stitched to the GND plain to help with thermal performance. The input and output traces should be as large as possible. The 100KΩ is also recommended in the design and should be placed close to the output decoupling cap. 146-6642-00 Vin U1 Vout ON/OFF GND Solved by TM SP619 Recommended Layout Aug24-17 Rev M SP619 High Current Power Switch 5 6 PIN SOT-23 Aug24-17 Rev M SP619 High Current Power Switch 6 ORDERING INFORMATION(1) Part number Operating Temperature Range SP619EK-L/TR(3) -10 to +85ºC SP619EK-L/TRR3 -10 to +85ºC Lead-Free Package Type Yes(2) 6 pin SOT23 Packaging Method Tape and Reel Tape and Reel (reverse orientation) NOTE: 1. Refer to www.exar.com/SP619 for most up-to-date Ordering Information 2. Visit www.exar.com for additional information on Environmental Rating. 3. NRND - Not recommended for new designs. Corporate Headquarters: 5966 La Place Court Suite 100 Carlsbad, CA 92008 Tel.:+1 (760) 692-0711 Fax: +1 (760) 444-8598 www.maxlinear.com High Performance Analog: 48720 Kato Road Fremont, CA 94538 Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7001 Email: powertechsupport@exar.com www.exar.com The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc.. MaxLinear, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the user. 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MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. Company and product names may be registered trademarks or trademarks of the respective owners with which they are associated. © 2008 - 2017 MaxLinear, Inc. All rights reserved Aug24-17 Rev M SP619 High Current Power Switch 7