DATA SHEET AAT4610B Current Limited Load Switch General Description Features The AAT4610B SmartSwitch is a current limited P-channel MOSFET power switch designed for high-side load switching applications. This switch operates with inputs ranging from 2.4V to 5.5V, making it ideal for both 3V and 5V systems. An integrated current-limiting circuit protects the input supply against large currents which may cause the supply to fall out of regulation. The AAT4610B is also protected from thermal overload which limits power dissipation and junction temperatures. It can be used to control loads that require up to 1A. Current limit threshold is programmed with a resistor from SET to ground. The quiescent supply current is typically a low 9μA. In shutdown mode, the supply current decreases to less than 1μA. • Input Voltage Range: 2.4V to 5.5V • Programmable Over-Current Threshold • Fast Transient Response: ▪ 400ns Response to Short Circuit • Low Quiescent Current ▪ 9μA Typical ▪ 1μA Max with Switch Off • 145mΩ Typical RDS(ON) • Only 2.5V Needed for ON/OFF Control • Under-Voltage Lockout • Thermal Shutdown • 4kV ESD Rating • 5-Pin SOT23 or 8-Pin SC70JW Package • Temperature Range: -40°C to +85°C The AAT4610B is available in a Pb-free 5-pin SOT23 or 8-pin SC70JW package and is specified over the -40°C to +85°C temperature range. Applications • • • • Hot Swap Supplies Notebook Computers Peripheral Ports Personal Communication Devices UL Recognized Component • UL Approved—File No. E217765 • Certified to IEC 60950-1(ed. 2), IEC 60950-1(ed. 2); am1 Typical Application INPUT OUTPUT IN AAT4610B OUT SOT23-5 ON (ON) SET ON/(ON) GND 1μF GND RSET 0.47μF GND Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 1 DATA SHEET AAT4610B Current Limited Load Switch Pin Descriptions Pin Number SOT23-5 SC70JW-8 Symbol 1 2 5 6, 7, 8 OUT GND 3 1 SET 4 2 ON 5 3, 4 IN Function P-channel MOSFET drain. Connect a 0.47μF capacitor from OUT to GND. Ground connection. Current limit set input. A resistor from SET to ground sets the current limit for the switch. Enable input. Two versions are available, active-high and active-low. See Ordering Information for details. P-channel MOSFET source. Connect a 1μF capacitor from IN to GND. Pin Configuration SOT23-5 (Top View) OUT GND SET 2 1 SC70JW-8 (Top View) 5 IN 2 3 4 ON SET ON IN IN 1 8 2 7 3 6 4 5 GND GND GND OUT Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 DATA SHEET AAT4610B Current Limited Load Switch Absolute Maximum Ratings1 TA = 25°C, unless otherwise noted. Symbol Description VIN VON VSET, VOUT IMAX TJ TLEAD VESD IN to GND ON(ON) to GND SET, OUT to GND Maximum Continuous Switch Current Operating Junction Temperature Range Maximum Soldering Temperature (at Leads) ESD Rating2 - HBM Value Units -0.3 to 6 -0.3 to VIN + 0.3 -0.3 to VIN + 0.3 2 -40 to 150 300 4000 V V V A °C °C V Value Units 150 667 °C/W mW Thermal Characteristics3 Symbol JA PD Description Thermal Resistance (SOT23-5 or SC70JW-8) Power Dissipation (SOT23-5 or SC70JW-8) 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. 3. Mounted on a demo board. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 3 DATA SHEET AAT4610B Current Limited Load Switch Electrical Characteristics VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C. Symbol VIN IQ Description IQ(OFF) ISD(OFF) VUVLO Operation Voltage Quiescent Current Off Supply Current Off Switch Current Under-Voltage Lockout RDS(ON) On Resistance TCRDS ILIM ILIM(MIN) VON(L) Conditions Min 2.4 VIN = 5V, ON (ON) = Active, IOUT = 0 ON (ON) = Inactive, VIN = 5.5V ON (ON) = Inactive, VIN = 5.5V, VOUT = 0 Rising Edge, 1% Hysteresis VIN = 5.0V, TA = 25°C VIN = 4.5V, TA = 25°C VIN = 3.0V, TA = 25°C 9 0.01 1.8 145 150 190 On Resistance Temperature Coefficient Current Limit Minimum Current Limit ON (ON) Input Low Voltage Typ Max Units 5.5 25 1 1 2.4 180 V μA μA μA V mΩ 230 2800 RSET = 6.8kΩ VON(H) ON (ON) Input High Voltage ION(SINK) TRESP TOFF TON ON (ON) Input Leakage Current Limit Response Time Turn-Off Time Turn-On Time VIN = 2.7V to 5.5V1 VIN = 2.7V to < 4.2V1 VIN ≥ 4.2V to 5.0V1 VON = 5.5V VIN = 5V VIN = 5V, RL = 10Ω VIN = 5V, RL = 10Ω TSD Over-Temperature Threshold VIN = 5V 1.2 1.6 130 ppm/°C 2.0 0.8 2.0 2.4 TJ Increasing TJ Decreasing V 0.01 0.4 4 12 125 115 1 12 200 1. For VIN outside this range, consult Typical ON (ON) Threshold curve. 4 A mA V Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 μA μs μs μs °C DATA SHEET AAT4610B Current Limited Load Switch Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. Quiescent Current vs. Temperature Quiescent Current vs. Input Voltage Quiescent Current (μA) 20 15 10 5 0 -40 -20 0 20 40 60 80 100 15 10 5 0 0 120 1 2 3 4 5 Temperature (°C) Input Voltage (V) Output Current vs. Output Voltage RDS(ON) vs. Temperature 6 (RSET = 22.1kΩ) 0.4 RDS(ON) (mΩ) Output Current (A) 0.5 0.3 0.2 0.1 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 240 220 200 180 160 140 120 100 80 60 40 20 0 Input = 3V Input = 5V -40 -20 0 20 40 60 80 100 Output Voltage (V) Temperature (˚˚C) Off-Supply Current vs. Temperature Off-Switch Current vs. Temperature 10 1 0.1 0.01 -40 120 10 Off-Switch Current (μA) Off-Supply Current (μA) Quiescent Current (μA) 20 -20 0 20 40 60 80 Temperature (°C) 100 120 1 0.1 0.01 0.001 -40 -20 0 20 40 60 80 100 120 Temperature (°°C) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 5 DATA SHEET AAT4610B Current Limited Load Switch Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. Turn-On vs. Temperature Turn-Off vs. Temperature (RLOAD = 10Ω; CLOAD = 0.47μF) (RLOAD = 10Ω; CLOAD = 0.47μF) 6 20 VIN = 5V 10 0 -40 -20 0 VIN = 5V 5 VIN = 3V Turn-Off Time (μs) Turn-On Time (μs) 30 20 40 60 80 4 VIN = 3V 3 2 1 0 100 -40 -20 0 20 Temperature (°C) Turn-On 5 ON Output Voltage (V) Voltage (V) 6 5 3 2 1 2 0 10 15 20 25 30 35 40 45 -10 50 Output 1 -1 5 -5 0 5 10 Time (μs) 12 10 Input Voltage 5 6 4 Output Current 2 2 0 Output Voltage -2 -4 0.0 0.5 1.0 1.5 Time (μs) 6 8 4 0 -0.5 25 30 35 40 45 50 2.0 2.5 3.0 2.20 Output Current (A) Input and Output Voltage (V) 8 1 20 V IH and V IL vs. VIN 7 3 15 Time (μs) Short-Circuit Through 0.3Ω 6 100 3 0 0 ON 4 -1 -5 80 Turn-Off 6 -10 60 (RL = 10Ω Ω; CL = 0.47μF) (RL = 10Ω; CL = 0.47μF) 4 40 Temperature (°C) 2.00 1.80 1.60 1.40 VIH 1.20 VIL 1.00 0.80 2.5 3.0 3.5 4.0 4.5 VIN (V) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 5.0 5.5 DATA SHEET AAT4610B Current Limited Load Switch Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. RSET vs. ILIM RSET Coefficient vs. ILIM 10 RSET ILIM Product (kV) RSET (kΩ) 100 10 1 100 9 8 7 6 5 1000 10000 ILIM (mA) 0 0.5 1 1.5 2 ILIM (A) Output Current vs. Temperature (RSET = 22.1kΩ) Current Limit (%) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -50 - 25 0 25 50 75 100 Temperature (°°C) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 7 DATA SHEET AAT4610B Current Limited Load Switch Functional Block Diagram IN OUT Over-Temperature Protection UnderVoltage Lockout ON (ON) 1.2V Reference SET Current Limit RSET GND Setting Current Limit In most applications, the variation in ILIM must be taken into account when determining RSET. The ILIM variation is due to processing variations from part to part, as well as variations in the voltages at IN and OUT, plus the operating temperature. See charts “Current Limit vs. Temperature” and “Output Current vs. VOUT.” Together, these three factors add up to a ±25% tolerance (see ILIM specification in Electrical Characteristics section). Figure 1 illustrates a cold device with a statistically higher current limit and a hot device with a statistically lower current limit, both with RSET equal to 8.87kΩ. While the chart, "RSET vs. ILIM” indicates an ILIM of 1.1A with an RSET of 10.5kΩ, this figure shows that the actual current limit will be at least 0.825A and no greater than 1.375A. To determine RSET, start with the maximum current drawn by the load and multiply it by 1.33 (typical ILIM = minimum ILIM / 0.75). This is the typical current limit value. Next, refer to “RSET vs. ILIM” and find the RSET that corresponds to the typical current limit value. Choose the 8 largest resistor available that is less than or equal to it. For greater precision, the value of RSET may also be calculated using the ILIM RSET product found in the chart “RSET Coefficient vs. ILIM.” The maximum current is derived by multiplying the typical current for the chosen RSET in the chart by 1.25. A few standard resistor values are listed in Table 1. Current Limit vs. Output Voltage (RSET = 8.87kΩ) 1.6 IMAX = 1.375A 1.4 Current Limit (A) Application Information Device with high current limit at -40°C 1.2 1.0 Device with low current limit at 85°C 0.8 IMIN = 0.825A 0.6 0.4 0.2 0 0 1 2 3 4 Output Voltage (V) Figure 1: Current Limit Using 10.5kΩ. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 5 DATA SHEET AAT4610B Current Limited Load Switch Operation in Current Limit RSET (kΩ) Current Limit Typ (mA) Device Will Not Current Limit Below (mA) Device Always Current Limits Below (mA) 40.2 30.9 24.9 22.1 19.6 17.8 16.2 14.7 13 10.5 8.87 7.5 6.81 6.04 5.49 4.99 4.64 225 300 350 425 450 525 600 675 700 1000 1100 1325 1600 1925 1950 2100 2350 169 225 263 319 338 394 450 506 525 750 825 994 1200 1444 1463 1575 1763 281 375 438 531 563 656 750 844 875 1250 1375 1656 2000 2406 2438 2625 2938 When a heavy load is applied to the output of the AAT4610B, the load current is limited to the value of ILIM determined by RSET (see Figure 2). Since the load is demanding more current than ILIM, the voltage at the output drops. This causes the AAT4610B to dissipate a larger than normal quantity of power, and its die temperature to increase. When the die temperature exceeds an over-temperature limit, the AAT4610B will shut down until is has cooled sufficiently, at which point it will startup again. The AAT4610B will continue to cycle on and off until the load is removed, power is removed, or until a logic high level is applied to ON. Enable Input In many systems, power planes are controlled by integrated circuits which run at lower voltages than the power plane itself. The enable input ON of the AAT4610B has low and high threshold voltages that accommodate this condition. The threshold voltages are compatible with 5V TTL and 2.5V to 5V CMOS. Table 1: Current Limit RSET Values Example: A USB port requires 0.5A. 0.5A multiplied by 1.33 is 0.665A. From the chart named “RSET vs. ILIM,” RSET should be less than 18kΩ. 17.8kΩ is a standard value that is a little less than 18kΩ but very close. The chart reads approximately 0.525A as a typical ILIM value for 17.8kΩ. Multiplying 0.525A by 0.75 and 1.25 shows that the AAT4610B will limit the load current to greater than 0.394A but less than 0.656A. Reverse Voltage The AAT4610B is designed to control current flowing from IN to OUT. If a voltage is applied to OUT which is greater than the voltage on IN, large currents may flow. This could cause damage to the AAT4610B. Overload Operation 1 0.5 0.25 0 5 Output Current 4 3 1A load is turned on at time = 0 Output Voltage 2 Output Current (A) Output Voltage (V) 0.75 1 0 -0.05 0 0.05 0.1 0.15 0.2 0.25 0.3 Figure 2: Overload Operation. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 9 DATA SHEET AAT4610B Current Limited Load Switch Ordering Information Package Enable Marking1 Part Number (Tape and Reel)2 SOT23-5 SC70JW-8 SOT23-5 SC70JW-8 ON (active high) ON (active high) ON (active low) ON (active low) 8FXYY 8GXYY B9XYY B8XYY AAT4610BIGV-1-T1 AAT4610BIJS-1-T1 AAT4610BIGV-T1 AAT4610BIJS-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. Package Information SOT23-5 2.85 ± 0.15 1.90 BSC 0.075 ± 0.075 10°° ± 5°° 0.40 ± 0.10 0.15 ± 0.07 GAUGE PLANE 4°° ± 4°° 1.10 ± 0.20 0.60 REF 1.20 ± 0.25 2.80 ± 0.20 1.575 ± 0.125 0.95 BSC 0.60 REF 0.45 ± 0.15 0.10 BSC All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 10 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 DATA SHEET AAT4610B Current Limited Load Switch SC70JW-8 2.20 ± 0.20 1.75 ± 0.10 0.50 BSC 0.50 BSC 0.50 BSC 0.225 ± 0.075 2.00 ± 0.20 0.100 7° ± 3° 0.45 ± 0.10 4° ± 4° 0.05 ± 0.05 0.15 ± 0.05 1.10 MAX 0.85 ± 0.15 0.048REF 2.10 ± 0.30 All dimensions in millimeters. Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. 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Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201937A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 7, 2012 11