SC33020H 2A Load Switch with Reverse Current Blocking POWER MANAGEMENT Features Description The SC33020H is an integrated 2A Load Switch with reverse current blocking. It operates from an 1.6V to 5.5V input supply. The SC33020H leaves the output node floating when the part is disabled. Input Voltage Range – 1.6V to 5.5V 2A Continuous Output Current Ultra Low Ron – 32mΩ Reverse Current Blocking Low Quiescent Current – 1μA Low Shutdown Current – 0.3µA Internal Soft Start Hardened ESD Protection 4kV Package: CSP – 0.9mm x 0.9mm 4-Bump The device provides extremely low 32mOhm ON resistance (RON) in an ultra-small package. The reverse blocking feature prevents current from flowing in reverse direction from the output through the device to the input supply rail. Whenever Vout to VIN voltage exceeds the reverse blocking threshold, reverse blocking is activated regardless of the IC enable state either (ON or OFF). Applications The SC33020H is offered in a tiny 0.9mm x 0.9mm x 0.60mm, 4 Bump CSP package. The SC33020H has an operating temperature range of -40°C to +85 °C. Wearable Electronics Tablet PCs, eReaders Smartphones Notebook PCs, Ultrabooks Battery Powered Equipment Other Portable Devices Typical Application Circuit VIN SUPPLY 1µF ENABLE Rev. 2.0 1µF SC33020H EN LOAD VOUT GND © 2015 Semtech Corporation SC33020H Pin Configuration Ordering Information TOP VIEW VIEW (BUMPS TOP ON THE BOTTOM) (BUMPS ON THE BOTTOM) A1 A2 B1 B2 Device Package SC33020HCSTRT CSP 0.9mm x 0.9mm 4-bump SC33020HCSEVB Evaluation Board Notes: (1) Available in tape and reel only. A reel contains 5,000 devices. (2) Lead-free package only. Device is WEEE and RoHS compliant, and halogen free. CSP 0.9x0.9, 4 Bump Marking Information Marking for the 0.9 x 0.9 mm CSP 4 Lead Package : O = Pin 1 ID nn = Part No. Code (Example: H4) - Reference Part No. SC33020H Absolute Maximum Ratings Recommended Operating Conditions VIN to GND (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 Ambient Temperature Range (°C). . . . . . . . . . -40 < TA < +85 EN to GND (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0 Maxiumum Output Current (A) . . . . . . . . . . . . . . . . . . . . . . . . 2 VOUT to GND (V). . . . . . . .. . . . . . . . . . . . . . . . -0.3 to (VVIN + 0.3) VVIN (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 to 5.5 ESD Protection Level HBM (kV). . . . . . . . . . . . . . . . . . . . . . . 4 (1) Thermal Information Thermal Resistance, Junction to Ambient(2) CSP (°C/W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Maximum Junction Temperature (°C). . . . . . . . . . . . . . . +125 Storage Temperature Range (°C). . . . . . . . . . . . . -65 to +150 Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . . +260 Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not recommended. NOTES: (1) Tested according to JEDEC standard JS-001-2012. (2) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards. Electrical Characteristics Unless noted otherwise, TA = 25°C for typical, -40°C < TA = TJ < +85°C for min and max, VIN = 2.8V, CIN = 1μF, COUT = 1μF, VEN = VVIN. Parameter Ron Symbol RON Quiescent Current(1) IQ Shutdown Current ISD Conditions Min Typ Max Units VIN =5.5V, IOUT = 200mA, VEN =1.5V 25 mΩ VIN =4.3V, IOUT = 200mA, VEN =1.5V 28 mΩ VIN =3.3V, IOUT = 200mA, VEN =1.5V 32 VIN =2.5V, IOUT = 200mA, VEN =1.5V 40 mΩ VIN =1.6V, IOUT = 200mA, VEN =1.5V 65 mΩ VIN=VEN,=3.6V, VOUT = open 1 3 µA VEN=0, VOUT = open 0.3 2 μA 1.24 μA VEN=0, VOUT = open, TA = 25°C 43 mΩ Turn-on Delay Time(2) TDT VEN=1.5V, VIN=3.6V, IOUT=200mA, COUT=1μF 440 μs Rising Time(2) TRT VEN=1.5V, VIN=3.6V, IOUT=200mA, COUT=1μF 640 μs Reverse Blocking Current (IOUT) RI VEN=0V, VIN=0V, VOUT=5.5V 3 Reverse Blocking Threshold RBT VOUT=2.8V, VOUT − VIN 75 mV Reverse Blocking Hysteresis RBH VOUT=2.8V, VOUT − VIN 25 mV Reverse Blocking 13 µA SC33020H Electrical Characteristics (continued) Parameter Symbol Conditions Min Typ Max Units 1.0 V EN Digital Input EN Input High Threshold VEN-IH EN Input Low Threshold VEN-IL EN Input Pull-Down Resistance REN 0.4 V 7 MΩ NOTES: (1) IQ current includes EN pull-down current. (2) For other TDT and TRT options, please contact SEMTECH. SC33020H Pin Descriptions Pin# Pin Name A1 VIN Input supply voltage. B1 EN Enable input. A 7MΩ internal resistor is connected from this pin to GND. Drive HIGH to turn on the switch; drive LOW to turn off the switch. When the EN pin is floated, the switch is OFF. A2 OUT Output voltage. B2 GND Ground. Pin Function Timing Diagram Turn-on Delay Turn-off Delay VEN VOUT 90% 10% Rising Time Falling Time (Turn on time)=(Turn-on Delay)+(Rising Time) SC33020H TypicalTesting Characteristics condition: VIN=5.5V, Iout=2A (Pure Testing condition: VIN=5.5V, Iout=2A, C2=1uF, Pure Shut Resistor, Down25ɗ by VIN Start25ɗ Up by VIN Resistor), C2=1uF, 5.5Vin, 2A 5.5Vin, 2A VIN 1V/div. T1(Vin) VOUT 1V/div. Iout VIN 1V/div. VOUT 1V/div. IOUT 1A/div. IOUT 1A/div. T1(Vin) T2(Vout) Iout Time (2ms/div) Time (2ms/div) VIN 1V/div. 3.6Vin, 18 Ω Start Up by EN Testing condition: VIN=5.5V, 25 Ԩ, Start UpPure by ENResistor, Iout=2A, C1=C2=1uF, 5.5Vin, 2.75 Ω T1(Vin) T2(Vout) VIN 1V/div. VOUT 1V/div. IOUT IIN 1A/div. VOUT 1V/div. EN 1.5V/div. EN 3.6V/div. IOUT 0.2A/div. Time (0.2ms/div) Time (0.2ms/div) 3.6Vin, 18 Ω Shut Down by EN VIN 1V/div. VOUT 1V/div. EN Reverse Blocking 1.6Vin to 1.5Vin, 1.6Vout, 0A VIN 0.3V/div. VOUT 0.3V/div. EN 3.6/div. IIN 0.5A/div. IOUT 0.2A/div. Time (20µs/div) Time (1ms/div) SC33020H Typical Characteristics, Cont. On Resistance vs. Temperature IOUT = 200mA Ĺı ijıı 1.6V OnœŰůĩŮȟĪ Resistance (mΩ) ķı Ķı 2.5V ĵı 3.3V 4.3V Ĵı 5.5V ijı 1.6V IJķı IJĵı IJijı IJıı 2.5V Ĺı 3.3V 4.3V ķı IJı 5.5V ĵı Įĵı ijĶ ĹĶ Temperature (°C) Įĵı ijĶ ŕŦŮűŦųŢŵŶųŦĩɗĪ Shut Down Current vs. Temperature Quiescent Current vs. Temperature IJįĵ ıįķ IJįij 5.5V Shutdown Current (µA) ŔũŶŵťŰŸůġńŶųųŦůŵĩŶłĪ Quiescent Current (µA) ŒŶŪŦŴŤŦůŵġńŶųųŦůŵĩŶłĪ ĹĶ Temperature (°C) ŕŦŮűŦųŢŵŶųŦĩɗĪ IJįı ıįĹ 3.3V ıįķ 2.8V ıįĵ 1.6V ıįĶ 5.5V 3.3V ıįĵ 2.8V ıįĴ ıįij 1.6V ıįIJ ıįij ıįı Įĵı ijĶ Temperature (°C) ıįı ĹĶ Įĵı ijĶ Temperature (°C) ŕŦŮűŦųŢŵŶųŦĩɗĪ ĹĶ ŕŦŮűŦųŢŵŶųŦĩɗĪ EN Pull-Down Resistance vs. Temperature EN HIGH Threshold vs. Temperature 2.8Vin ĺıı Ĺįı EN Input Pull-Down Resistance (MΩ) ņŏġőŶŭŭťŰŸůġœŦŴŪŴŵŢůŤŦĩŎȟĪ ņŏĩŮŗĪ (mV) EN High Threshold On Resistance vs. Temperature IJĹı ĸı On œŰůĩŮȟĪ Resistance (mΩ) IOUT = 2A ĹĶı Ĺıı 5.5V ĸĶı 3.6V 2.8V ĸıı ķĶı 1.6V ķıı ĸįĹ ĸįķ ĸįĵ ĸįij ĸįı ķįĹ ķįķ ķįĵ ķįij ķįı ĶĶı Įĵı ijĶ Temperature (°C) ŕŦŮűŦųŢŵŶųŦĩɗĪ ĹĶ Įĵı ijĶ ĹĶ Temperature (°C) ŕŦŮűŦųŢŵŶųŦĩɗĪ SC33020H Typical Characteristics, Cont. Rising Time vs. Temperature Turn-on Delay Time vs. Temperature ijĶıı IJķıı Turn-On Rising Time (µs) IJijıı 1.6V ŕŶųůĮŐŧŧġŅŦŭŢźġŕŪŮŦĩŶŔĪ ŕŶųůĮŐůġŅŦŭŢźġŕŪŮŦĩŶŔĪ Turn-On Delay Time (µs) IJĵıı ijııı IJĶıı IJııı 3.6V Ķıı 5.5V ijĶ Temperature (°C) Ĺıı 3.6V ķıı 5.5V ĵıı ijıı ı Įĵı 1.6V IJııı ı ĹĶ Įĵı ijĶ Temperature (°C) ŕŦŮűŦųŢŵŶųŦĩɗĪ ŕŦŮűŦųŢŵŶųŦĩɗĪ Reverse Blocking Current vs. Temperature Turn-off Time vs. Temperature ĴĶ 1.6V ijĶ ijı œŦŷŦųŴŦġŃŭŰŤŬŪůŨġńŶųųŦůŵĩŶłĪ Turn-Off Time (µs) ŕŶųůĮŐŧŧġŅŦŭŢźġŕŪŮŦĩŶŔĪ Reverse Blocking Current (µA) ķ Ĵı 3.6V IJĶ 3.6V IJı ĹĶ 5.5V Ķ EN = Low Ķ ĵ Ĵ ij IJ ı ı Įĵı ijĶ Temperature (°C) ĹĶ ŕŦŮűŦųŢŵŶųŦĩɗĪ Įĵı ijĶ ĹĶ Temperature (°C) ŕŦŮűŦųŢŵŶųŦĩɗĪ Reverse Blocking Threshold and Hysteresis vs. Temperture ĺı Ůŗ (mV) Reverse Blocking Ĺı Threshold ĸı ķı Ķı ĵı Hysteresis Ĵı ijı Įĵı ijĶ ĹĶ Temperature (°C) ŕŦŮűŦųŢŵŶųŦĩɗĪ SC33020H Block Diagram REVERSE BLOCKING VOUT VIN (1.6V to 5.5V) C1 Slew Rate Control EN C2 ILoad (Up to 2A) SC33020H GND SC33020H Application Information Operation The SC33020H is an integrated high-side PMOS load switch that is designed to support up to 2A continuous output current and operates from an input voltage from 1.6V to 5.5V. The internal PMOS pass element has a very low ON resistance of 32mΩ (typical) at VIN = 3.3V. The SC33020H also provides ultra-low shutdown and quiescent current for extended battery life during shutdown and standby conditions. An internal soft start circuit is used to control the start-up time of the load switch to reduce inrush current during start up. Enable The EN pin controls the ON/OFF state of the load switch. Pulling the EN pin HIGH turns on the load switch. Pulling the EN pin LOW turns off the load switch. The EN pin incorporates a 7MΩ (typical) pull-down resistor, so that when the EN pin is floating the SC33020H is disabled. Reverse Blocking The SC33020H integrates a reverse current blocking circuit to prevent current flow from VOUT to VIN during both ON and OFF states. The reverse current blocking circuit is active when voltage is present on either the VIN or the VOUT. A comparator is used to sense and compare the VOUT voltage to the VIN voltage. Whenever the VOUT voltage is 75mV (typical at 25°C) higher than VIN, the Reverse Blocking circuit is triggered and reverse current is blocked from VOUT to VIN. Please note that when 0 < VOUT - VIN < 75mV (typical at 25°C), some small reverse current is possible. An example is shown in Fig. 1. Usually, worst case for reverse current occurs at elevated input voltages and reduced temperatures. The following formula can be used to calculate the reverse peak current before the Reverse Blocking circuit is triggered. IRC = VRBT RON IRC - Reverse peak current. R ON - On-Resistance, (Usually, is smaller resistance at higher VIN and lower temperature.) VRBT - Reverse voltage threshold. IRC is the amount of reverse current, RON is the on-resistance, on There is smaller resistance at larger VIN and lower ambient temperature VBT is the reverse voltage threshold. VOUT VRBT IRC VIN REVERSE CURRENT Figure 1 Input Capacitor In order to reduce the effect of voltage drop, noise and bounce at the VIN pin, a filter/decoupling capacitor between VIN to GND is recommended. A 1µF ceramic capacitor is sufficient for most application conditions. However, it should be noted that suppressing bounce at input loop after EN is changed from HIGH to LOW can require greater capacitor values depending on particular designs. In circuit design, ceramic capacitors should be derated for operating temperature and voltage. For applications up to 3.6V, capacitors should be rated at 6.3V or higher. For applications up to 5.5V, capacitors should be rated at 10V or higher. Output Capacitor A 1µF ceramic capacitor is normally used at the VOUT pin to filter noise. If a larger output capacitance value is used, the input inrush current should be considered because the power-on transient is also dependent on the output capacitor value. Please use the same derating criteria for the output capacitor selection. Board Layout Considerations Fig. 2 shows a typical application circuit with PCB inductance on the circuit board. An important objective of the layout is to minimize the PCB inductance by reducing the length and increasing the width of the traces. PCB inductance can affect circuit performance during turn-off, load transients, and Reverse Blocking. Fig. 2 shows three current loops during the opening or closing of the load switch. The magnitude of the voltage ringing at VIN or VOUT pin 10 SC33020H Application Information, Cont. is related to the PCB stray inductance and the placement of the capacitors. The input capacitor C1 and output capacitor C2 need to be placed close to the SC33020H. It is important to keep the voltage ringing below the maximum voltage rating of the SC33020H. LPCB LPCB + - IIN VIN VOUT C1 1uF LPCB LPCB C2 1uF SC33020H IOUT RL GND ISW LPCB Figure 2 - PCB Circuit with Equivalent Parasitic Inductance Evaluation Board Information The Top Layer and Bottom Layer of a standard evaluation board are shown in Fig. 3 and Fig. 4, respectively. Both T1 and T2 test points are Kelvin connections which can be used to minimize the measurement error of RON. To enable the part, a jumper can be used between VIN and EN on J1. To disable the part, a jumper can be connected between EN and GND on J1. C3 is an optional solution to improve ringing at input rail during turn-off and reverse blocking conditions. 11 SC33020H Top Layer, SC33020H DBN461!W!21/6!;!Uiv!Bvh!39!27;3:;2:!3125!.!)Voujumfe* Figure 3 Bottom Layer, SC33020H DBN461!W!21/6!;!Uiv!Bvh!39!27;41;22!3125!.!)Voujumfe* Figure 4 12 SC33020H Outline Drawing — CSP 0.9mm X 0.9mm, 4 Lead 13 SC33020H Land Pattern — CSP 0.9mm X 0.9mm, 4 Lead 14 SC33020H © Semtech 2015 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent or other industrial or intellectual property rights. Semtech assumes no responsibility or liability whatsoever for any failure or unexpected operation resulting from misuse, neglect improper installation, repair or improper handling or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified range. 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