MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches General Description Benefits and Features The MAX20313 and MAX20315 feature a continuous current-limit mode during an overcurrent event. The MAX20314 and MAX20316 feature a latchoff mode during an overcurrent event. Additional safety features include thermal shutdown protection to prevent overheating and reverse current blocking to prevent current from being driven back into the source. ●● Space Saving • 12-Bump 0.4mm Pitch 1.68mm x 1.48mm WLP The MAX20313–MAX20316 programmable current-limit switches feature internal current limiting to prevent damage to host devices due to faulty load conditions. These current-limit switches feature a low, 10mΩ (typ) onresistance and operate from a +2.5V to +5.5V input voltage range. The current limit is adjustable from 500mA to 6A, making these devices ideal for charging a large load capacitor and for high-current load-switching applications. The devices are available in a 12-bump (0.4mm pitch, 1.68mm x 1.48mm) wafer-level package (WLP) and operate over the -40°C to +85°C extended temperature range. Ordering Information appears at end of data sheet. 19-100072; Rev 0; 6/17 ●● Reliable Protection • Adjustable Current Limit (500mA to 6A) • Accurate ±5% Overload Current Limit (2A to 6A) • Current Monitoring • Low RON 10mΩ (typ) • Reverse Current Protection • Short-Circuit Protection • Thermal Shutdown Protection Applications ●● ●● ●● ●● ●● ●● RF Power Amplifiers in Cell Phones USB Ports Data Modem Cards Portable Media Players UTCA/ATCA Platforms SDXC Card Power Supply Protection MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Absolute Maximum Ratings (All voltages referenced to GND.) IN, OUT, EN, EN, FLAG, SETI.................................-0.3V to +6V Continuous Current Into Any Terminal (except IN, OUT)....20mA OUT Short Circuit to GND.................................Internally Limited Continuous Power Dissipation (TA = +70°C) WLP (derate 13.73mW/°C above +70°C)................1098.4mW Operating Temperature Range............................ -40°C to +85°C Junction Temperature.......................................................+150°C Storage Temperature Range............................. -65°C to +150°C Soldering Temperature (reflow)........................................+260°C Package Thermal Characteristics (Note 1) WLP Junction-to-Ambient Thermal Resistance (θJA)......72.82°C/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VIN = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V SUPPLY OPERATION Operating Voltage Undervoltage Lockout Quiescent Current VIN 2.5 VUVLO IQ 1.45 V IOUT = 0A, switch on, (supply current comes from high voltage between IN and OUT) 250 525 µA Latchoff Current ILATCH VIN = 4.3V, IOUT = 0A, after an overcurrent fault (MAX20314, MAX20316) 3.5 20 µA Shutdown Forward Current ISHDN VEN = 0V, VEN = VIN, VIN = 5.5V, VOUT = 0V 3.0 20 µA Shutdown Reverse Current IRSHDN VEN = 0V, VEN = VOUT, VIN = 0V, VOUT = 5.5V 3.0 20 µA VIN = 4.3V, IOUT = 1A, IOUT < ILIM, TA = +25ºC 10 19 mΩ INTERNAL FET Switch-on Resistance (Note 3) Forward Current Limit (Note 3) Current Limit Fold Back RON ILIM ILIM_FB RSETI = 675Ω, VIN = 4.3V 5700 6000 6300 RSETI = 2063Ω, VIN = 4.3V 1900 2000 2100 RSETI = 9019Ω, VIN = 4.3V 425 500 575 VIN = 4.3V, VOUT = 0V, ILIM = 1A -10 mA % RSETI Coefficient P ILIM = 500mA to 6A 3329 RSETI Constant C ILIM = 500mA to 6A 12 mA VIN = VEN = 4.3V, ILOAD = 80% ILIM steps to 120% ILIM to flowing current within 10% ILIM 60 µs Load Transient Step Reaction Time www.maximintegrated.com tSR Maxim Integrated │ 2 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Electrical Characteristics (continued) (VIN = 2.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C) (Note 2) PARAMETER SYMBOL Accurate Reverse Current Blocking Trigger Threshold VAREV_TH Accurate Reverse Current Blocking Release Threshold VAREV_EX Accurate Reverse Blocking Debounce Time tDB_ARIB Fast Reverse Current Blocking Threshold VFREV_TH CONDITIONS MIN TYP MAX UNITS VOUT - VIN 1 8 25 mV VOUT - VIN 0 7 mV 128 µs (VOUT - VIN) changes from 0V to -0.02V in 100ns, the time needed to block reverse current VOUT - VIN Fast Reverse Blocking Response Time tFRIB (VOUT - VIN) changes from 0V to -0.3V in 100ns, the time needed to block reverse current FLAG Assertion Drop Voltage Threshold VFA Increase (VIN - VOUT) drop until FLAG asserts, in current limit mode, VIN = 4.3V 40 65 110 3 70 120 mV µs 185 mV 0.9 µA EN, EN INPUT EN, EN Input Leakage ILEAK EN, EN Input Logic-High Voltage VIH EN, EN Input Logic-Low Voltage VIL FLAG OUTPUT EN, EN = IN or GND -0.9 1.4 V 0.4 V FLAG Output Logic-Low Voltage ISINK = 1mA 0.4 V FLAG Output Leakage Current VIN = VFLAG = 5.5V, FLAG deasserted 0.9 µA 5 ms TIMING CHARACTERISTICS Turn-On Delay tON Time from EN/EN signal to VOUT = 90% of VIN, VIN = 4.3V (Figure 1) Turn-Off Time tOFF Time from EN/EN signal to VOUT = 10% of VIN, VIN = 4.3V, CLOAD = 1000pF, RLOAD = 860Ω (Figure 1) 50 µs Current-Limit Reaction Time tLIM VIN = 4.3V, output high and then short circuit applied, IOUT > 200% ILIM 3 µs Blanking Time tBLANK VIN = 4.3V (Figure 2) 2.5 12 4 15 18 ms THERMAL PROTECTION Thermal Shutdown 150 °C Thermal Shutdown Hysteresis 20 °C Temperature Increase Self-Limitation 130 °C Note 2: All devices are 100% production tested at TA = +25°C. Specifications over the operating temperature range are guaranteed by design. Note 3: Guaranteed by design and device characterization. www.maximintegrated.com Maxim Integrated │ 3 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches EN tON 90% VIN VOUT tOFF 10% VIN Figure 1. Timing Diagram for Measuring Turn-On Time and Turn-Off Time tBLANK tBLANK OUT CURRENT LIMIT LOAD CURRENT THE DEVICE GOES TO THERMAL-SHUTDOWN MODE FLAG Figure 2. Latchoff Fault Diagram www.maximintegrated.com Maxim Integrated │ 4 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Typical Operating Characteristics (VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C, unless otherwise noted.) 1.04 3.30 1.03 3.20 3.10 3.00 2.90 2.80 2.70 2.60 2.5 3.0 3.5 4.0 4.5 5.0 1.02 1.01 1.00 0.99 0.98 0.97 350 0.95 300 250 200 150 100 50 VEN = VIN 0 5.5 -40 -15 SUPPLY VOLTAGE (V) 10 35 60 85 1.5 2.0 2.5 TEMPERATURE (ºC) QUIESCENT SUPPLY CURRENT vs. TEMPERATURE toc04 350 QUIESCENT SUPPLY CURRENT vs. SUPPLY VOLTAGE toc03 CURRENT LIMIT 1.5A 0.96 RSETI = 1.3kΩ 2.50 NORMALIZED CURRENT LIMIT vs. TEMPERATURE toc02 1.05 3.40 NORMALIZED CURRENT LIMIT CURRENT LIMIT (A) 3.50 toc01 QUIESCENT SUPPLY CURRENT (µA) CURRENT LIMIT vs. SUPPLY VOLTAGE 3.5 14 VIN = 4.3V 200 150 100 50 VEN = VIN -40 -15 10 35 60 10 8 6 VIN = 5V 4 VIN = 4.3V 2 0 -15 TEMPERATURE (ºC) VOUT = 0V, VEN = 0V 10 10 35 60 6 4 2 0 8 6 VIN = 5.5V 4 TEMPERATURE (ºC) www.maximintegrated.com 2 VIN = 2.3V -15 60 85 10 35 60 85 NORMALIZED ON-RESISTANCE vs. SUPPLY VOLTAGE toc09 1.5 VEN = VIN , ILOAD = 1A NORMALIZED TO VIN = 4.3V 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0 35 4 1.4 VIN = 4.3V 10 VIN = 5.5V 6 -40 toc08 2 -15 8 85 VEN = VIN MAX20314 10 8 -40 10 TEMPERATURE (ºC) LATCHOFF CURRENT vs. TEMPERATURE 12 VOUT = 5.5V, VIN = 1.7V VEN = 0V LATCHOFF CURRENT (µA) SHUTDOWN REVERSE CURRENT (µA) 12 12 TEMPERATURE (ºC) SHUTDOWN REVERSE CURRENT vs. TEMPERATURE toc07 5.5 5.0 0 -40 85 NORMALIZED ON-RESISTANCE 0 SHUTDOWN FORWARD CURRENT (µA) SHUTDOWN SUPPLY CURRENT (µA) QUIESCENT SUPPLY CURRENT (µA) VIN = 5V 250 4.5 SHUTDOWN FORWARD CURRENT vs. TEMPERATURE toc06 VEN = 0V 300 4.0 SUPPLY VOLTAGE (V) SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE toc05 12 3.0 0.5 -40 -15 10 35 TEMPERATURE (ºC) 60 85 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) Maxim Integrated │ 5 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Typical Operating Characteristics (continued) (VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C, unless otherwise noted.) NORMALIZED ON-RESISTANCE vs. TEMPERATURE toc10 1.4 OUTPUT CURRENT vs. OUTPUT VOLTAGE 2.5 toc11 1200 1 0.9 0.8 RSETI = 2kΩ 1.5 RSETI = 2.4kΩ 1.0 0.5 IOUT = 1A -15 10 35 60 0 0.02 TEMPERATURE (ºC) SETI VOLTAGE vs. OUT CURRENT 1400 toc13 SWITCH TURN-ON TIME (ms) 1000 VIN = 3V VIN = 4.3V 800 600 VIN = 5.5V 400 200 0.06 0.08 VIN - VOUT (V) 0.1 0.12 1 2 3 4 5 6 0 toc14 2 3 4 VIN = 5V 3.4 3.3 3.2 57 56 VIN = 5V 55 54 VIN = 4.3V 53 52 51 50 -40 -15 10 35 60 85 -40 -15 10 35 85 CURRENT LIMIT RESPONSE (SUDDEN SHORT) toc17 VIN = VEN = 4.3V CURRENT LIMIT 3A MAX20313 MAX20313 IOUT 2A/div IOUT 10A/div VOUT 5V/div VOUT 5V/div VSETI 1V/div VSETI 1V/div 5V/div V/FLAG\ 5V/div www.maximintegrated.com 60 TEMPERATURE (ºC) CURRENT LIMIT RESPONSE (SUDDEN SHORT) toc16 10ms/div toc15 RLOAD = 10Ω TEMPERATURE (ºC) VIN = VEN = 4.3V CURRENT LIMIT 3A 6 58 3.5 OUT CURRENT (A) V/FLAG\ 5 SWITCH TURN-OFF TIME vs. TEMPERATURE 59 3.7 3.6 1 60 VIN = 4.3V 3.8 3.0 0 TA = +85ºC 400 OUT CURRENT (A) 3.1 0 600 0.14 RLOAD = 10Ω 3.9 1200 0.04 SWITCH TURN-ON TIME vs. TEMPERATURE 4.0 RSETI = 614Ω 800 0 0.0 85 SWITCH TURN-OFF TIME (µs) -40 TA = -40ºC TA = +25ºC 200 0.7 0.6 SETI VOLTAGE (mV) SETI VOLTAGE (mV) OUTPUT CURRENT (A) NORMALIZED ON-RESISTANCE 1000 2.0 1.1 toc12 RSETI = 614Ω 1.3 1.2 SETI VOLTAGE vs. OUT CURRENT 10µs/div Maxim Integrated │ 6 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Typical Operating Characteristics (continued) (VIN = 4.3V, CIN = 1µF, COUT = 1µF, TA = +25°C, unless otherwise noted.) CURRENT LIMIT RESPONSE (SLOW LOAD INCREASE) toc19 CURRENT LIMIT RESPONSE (SLOW LOAD INCREASE) toc18 VIN = VEN = 4.3V CURRENT LIMIT 3A MAX20313 IOUT 2A/div IOUT VOUT 5V/div VOUT VSETI V/FLAG\ MAX20313 2V/div 5V/div V/FLAG\ 5V/div 4ms/div FLAG RESPONSE (OVERLOAD CONDITION) toc21 MAX20313 MAX20313 IOUT VIN = VEN = 4.3V CURRENT LIMIT 3A SUDDEN SHORT 2A/div VOUT 2A/div VOUT 5V/div VSETI 1V/div VFLAG 5V/div 5V/div VSETI 1V/div V/FLAG\ 5V/div 10ms/div www.maximintegrated.com 5V/div VSETI CURRENT LIMIT RESPONSE (FAST LOAD INCREASE) toc20 IOUT 2A/div 1V/div 1s/div VIN = VEN = 4.3V CURRENT LIMIT 4.1A VIN = VEN = 4.3V CURRENT LIMIT 3A 4ms/div Maxim Integrated │ 7 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Bump Configurations TOP VIEW (BUMPS ON BOTTOM) 1 2 3 4 MAX20313/MAX20314 A FLAG SETI GND EN IN OUT OUT IN IN OUT OUT IN 1 2 3 4 B C MAX20315/MAX20316 A SETI GND EN IN OUT OUT IN IN OUT OUT IN FLAG B C www.maximintegrated.com Maxim Integrated │ 8 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Bump Description BUMP MAX20313 MAX20314 MAX20315 MAX20316 NAME FUNCTION A1 A1 FLAG Open-Drain Overcurrent Indicator Output. FLAG goes low when the overload fault duration exceeds the blanking time, reverse current is detected, or thermal shutdown mode is active. A2 A2 SETI Forward Current-Limit Adjust Input. Connect a resistor from SETI to GND to program the overcurrent limit. If SETI is connected to GND, the device, as well as the connected circuitry, cannot be protected from an overcurrent condition. Leaving SETI unconnected forces the device to set an arbitrary small but uncontrolled current limitation (<100mA). A3 A3 GND Ground A4 — EN Active-High Enable Input. Drive EN high to turn on the switch. Drive EN low to turn off the switch. — A4 EN Active-Low Enable Input. Drive EN low to turn on the switch. Drive EN high to turn off the switch. B1, B4, C1, C4 B1, B4, C1, C4 IN Power Input. Connect IN together and bypass IN to GND with a 1µF ceramic capacitor as close as possible to the device. If necessary, use higher capacitance to prevent large load transients from pulling down the supply voltage. B2, B3, C2, C3 B2, B3, C2, C3 OUT www.maximintegrated.com Switch Output. Connect OUT together and bypass OUT to GND with a 1µF ceramic capacitor as close as possible to the device. Maxim Integrated │ 9 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Functional Diagram REVERSE-CURRENT PROTECTION IN OUT MAX20313 MAX20314 MAX20315 MAX20316 THERMAL SHUTDOWN CONTROL LOGIC BUFFER FLAG TIMING CIRCUITRY BANDGAP REFERENCE CURRENT LIMIT BUFFER SETI EN/EN EN: MAX20313, MAX20314 EN: MAX20315, MAX20316 Detailed Description The MAX20313-MAX20316 programmable current-limit switches operate from +2.5V to +5.5V and provide internal current-limiting adjustable from 500mA to 6A. These devices feature a fixed blanking time and a FLAG output that notifies the processor when a fault condition is present. Programmable Current-Limit Threshold A resistor from SETI to GND sets the current-limit threshold for the switch (see Setting the Current-Limit Threshold and Current Monitoring section). If the output current is limited at the current threshold value for a time equal to, or longer than, tBLANK with VIN - VOUT higher than the FLAG assertion drop-voltage threshold (VFA), the FLAG asserts and the MAX20313/MAX20315 enter continuous current-limit mode, and the MAX20314/MAX20316 latch off the switch. www.maximintegrated.com Continuous Current Limit (MAX20313/MAX20315) When the forward current reaches the forward current threshold, the MAX20313/MAX20315 limit the output current to the programmed current limit. FLAG asserts if the current limit is present for tBLANK, and deasserts when the overload condition is removed. In this mode, if the die temperature reaches +130°C (typ) due to self-heating, the part will prevent itself from consuming more power than what can be dissipated through the thermal resistance of the package. The average current limitation will be lowered automatically to a sustainable value given the thermal design. If current limitation is not the cause and the temperature continues to rise exceeding +150°C (typ), the device will go into thermal shutdown mode until the die temperature drops by approximately 20°C. Maxim Integrated │ 10 MAX20313–MAX20316 Latchoff (MAX20314/MAX20316) When the forward current reaches the current threshold, the tBLANK timer begins counting (Figure 2). FLAG asserts if an overcurrent condition is present for greater than tBLANK time. The timer resets if the overcurrent condition disappears before tBLANK has elapsed. The switch turns off if the overcurrent condition continues beyond the blanking time. Reset the switch by either toggling the control logic (EN/ EN) or by cycling the input voltage. If the die temperature reaches +130°C (typ) due to self-heating, the part will prevent itself from consuming more power than what can be dissipated through the thermal resistance of the package. The average current limitation will be lowered automatically to a sustainable value given the thermal design. If current limitation is not the cause and the temperature continues to rise exceeding +150°C (typ), the device will go into thermal shutdown mode until the die temperature drops by approximately 20°C. Current Limit Fold Back The devices feature a natural current limit fold back behavior once the current limit level is reached. The current limit fold back value is typically 10% of the current limit set through the SETI resistor and is slightly dependent on die temperature and the voltage drop between IN and OUT. If the overcurrent fault is so severe that the power dissipated by the part makes it exceed the Temperature Increase Self-Limitation (130°C, typ) or that the OUT voltage falls below 1.8V, additional safe over-limitation circuitry is triggered and the average current limit of the part is further decreased even possibly to a very low and safe value. For the continuous option, to resume normal operation after an overcurrent fault, the load current needs to fall below the actual current limitation set by the part including fold back and eventual safe over-limitation. Switch Enable Control The EN/EN controls the switch (Table 1). Reverse-Current Protection The devices feature a reverse-current protection circuit that turns the switch off when higher OUT voltage than IN voltage is sensed. The switch turns off and FLAG asserts after accurate reverse blocking debounce time (tDB_ARIB) in response to a lower threshold reverse fault (VAREV_TH) or fast reverse blocking response time (tFRIB) in case of a higher threshold reverse fault (VFREV_TH). www.maximintegrated.com 500mA to 6A Adjustable Current-Limit Switches Table 1. Switch Truth Table MAX20313 MAX20314 MAX20315 MAX20316 EN SWITCH STATUS EN 0 1 OFF 1 0 ON FLAG Indicator FLAG is an open drain fault indicator output and requires an external pullup resistor to a DC supply. FLAG goes low when any of the following conditions occur: ●● An overcurrent condition after the blanking time has elapsed and VIN – VOUT > VFA ●● The reverse-current protection has tripped ●● The die temperature exceeds +150°C (typ) Temperature Increase Self-Limitation If the die temperature reaches +130°C, the device will prevent itself from consuming more power than what can be dissipated by the thermal resistance of the package. The feature imposes a thermal control loop between temperature and current limit level lowering the flowing current through the part when junction temperature try to rise above +130°C. Because of that, thermal design of the board has an impact on loop behavior: the average limited current is always reduced to the appropriate safe level for any thermal design but the current limit may oscillate as in auto-retry mode across the average level when the thermal resistance of the board is high. Thermal Shutdown Thermal shutdown circuitry protects the devices from overheating. The switch turns off and FLAG goes low immediately when the junction temperature exceeds +150°C (typ). The MAX20313/MAX20315 switches turn on again after the device temperature drops by approximately 20°C (typ). Maxim Integrated │ 11 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Applications Information If the supply is not strong enough and the user does not want to use a larger capacitor at the input, the following circuitry can be used (Figure 3). Setting the Current-Limit Threshold and Current Monitoring Connect a resistor between SETI and ground to program the current limit threshold value for the devices. Table 2 shows current limit thresholds for different resistor values at SETI. Use the following formula to calculate the current limit: 1.224(V) × P R SETI(Ω ) = ILIM(A) − C(A) Do not use a RSETI value smaller than 675Ω. A current mirror is implemented with a current sense autozero operational amplifier. The mirrored current of the IN-OUT FET is provided on the SETI pin. Therefore, the voltage (VSETI) read on the SETI pin can be interpreted as the current through the IN-OUT FET as below: IIN−OUT = (A) I SETI (A) × P + = C(A) VSETI(V) × P + C(A) R SETI(Ω ) Note: the current monitor feature does not provide valid information if the device is performing safe current overlimitation (die temperature > 130°C (typ) or OUT voltage < 1.8V, see Current Limit Fold Back section). IN Bypass Capacitor Connect a minimum 1µF capacitor from IN to GND to limit the input voltage drop during momentary output shortcircuit conditions. If the power supply cannot support the required short-circuit current, a larger capacitor should be used to maintain the input voltage above 2.5V. OUT Bypass Capacitor For stable operation over the full temperature range and over the full programmable current-limit range, use a 1µF ceramic capacitor from OUT to ground. Excessive output capacitance can cause a false overcurrent condition due to decreased dV/dt across the capacitor. Use the following formula to calculate the maximum capacitive load (CMAX) on OUT: C MAX (µF) = ILIM(mA) × t BLANK(MIN) (ms) VIN(V) For example, for VIN = 5V, tBLANK(MIN) = 10ms, and ILIM = 1000mA, CMAX equals 2000µF. Layout and Thermal Dissipation To optimize the switch response time to output shortcircuit conditions, it is very important to keep all traces as short as possible to reduce the effect of undesirable parasitic inductance. Place input and output capacitors as close as possible to the device (should be no more than 5mm). IN and OUT must be connected with wide short traces to the power bus. During normal operation, the power dissipation is small and the package temperature change is minimal. If the output is continuously shorted to ground, the power dissipation for the MAX20313/ MAX20315 continuous current limit version can cause the device to reach the thermal shutdown threshold. Table 2. Current Limit Threshold vs. Resistor Values RSETI (Ω) CURRENT LIMIT (A) 9019 0.5 4247 1.0 2777 1.5 2063 2.0 1641 2.5 1363 3.0 1165 3.5 1017 4.0 903 4.5 812 5.0 737 5.5 675 6.0 www.maximintegrated.com OUT IN 1µF MAX20313 MAX20314 MAX20315 EN/EN MAX20316 FLAG LOAD RSETI SETI GND ~100Ω* *IF VIN > 3V, A DIODE CAN BE USED IN PLACE OF THE RESISTOR. Figure 3. Optional Protection for Weak Supply Maxim Integrated │ 12 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Typical Operating Circuit MAX20313/MAX20314/ MAX20315/MAX20316 BIAS VOLTAGE IN POWER SUPPLY 1µF OUT LOAD 1µF ADC CHARGE PUMP SETI VPULLUP µP CURRENT REFERENCE RSETI 10kΩ CONTROL LOGIC FLAG EN/EN* GND *EN: MAX20313, MAX20314 EN: MAX20315, MAX20316 Ordering Information/Selector Guide OVERCURRENT RESPONSE EN POLARITY TOP MARK TEMP RANGE PINPACKAGE Continuous Active-High ADT -40°C TO +85°C 12 WLP MAX20314EWC+T* Latchoff Active-High ADU -40°C TO +85°C 12 WLP MAX20315EWC+T* Continuous Active-Low ADV -40°C TO +85°C 12 WLP MAX20316EWC+T* Latchoff Active-Low ADW -40°C TO +85°C 12 WLP PART MAX20313EWC+T +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *Future product—Contact Maxim for availability. Chip Information PROCESS: BiCMOS Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 12 WLP W121K1+1 21-100118 Refer to Application Note 1891 www.maximintegrated.com Maxim Integrated │ 13 MAX20313–MAX20316 500mA to 6A Adjustable Current-Limit Switches Revision History REVISION NUMBER REVISION DATE 0 6/17 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2017 Maxim Integrated Products, Inc. │ 14