AAT4610A_07 ANALOGICTECH | Alldatasheet

Document overview

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Technical content

Features

  • 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
  • 145m Ω Typical R DS(ON)
  • Only 2.5V Needed for ON/OFF Control
  • Under-Voltage Lockout
  • Thermal Shutdown
  • 4kV ESD Rating
  • UL Approved—File No. E217765
  • 5-Pin SOT23 or 8-Pin SC70JW Package
  • Temperature Range: -40°C to +85°C

Applications

  • Hot Swap Supplies
  • Notebook Computers
  • Peripheral Ports
  • Personal Communication Devices UL Recognized Component Typical Application AAT4610A ON/(ON) IN SET INPUT GND GND GND OUT SOT23-5 OUTPUT ON (ON) 0.47µFRSET1µF

Current Limited Load Switch 2 4610A.2007.06.1.4 Pin Descriptions Pin Configuration SOT23-5 SC70JW-8 (Top View) (Top View) Pin # SOT23-5 SC70JW-8 Symbol Function 1 5 OUT P-channel MOSFET drain. Connect a 0.47µF capacitor from OUT to GND. 2 6, 7, 8 GND Ground connection. 3 1 SET Current limit set input. A resistor from SET to ground sets the current limit for the switch. 4 2 ON Enable input. Two versions are available, active-high and active-low. See Ordering Information for details. 5 3, 4 IN P-channel MOSFET source. Connect a 1µF capacitor from IN to GND. GND IN ONSET OUT 1 3 4 ON IN IN GND GND GND OUT SET 1

TA = 25°C, unless otherwise noted. Thermal Characteristics3 Symbol Description Value Units VIN IN to GND -0.3 to 6 V VON ON(ON) to GND -0.3 to V IN + 0.3 V VSET ,VOUT SET, OUT to GND -0.3 to V IN + 0.3 V IMAX Maximum Continuous Switch Current 2 A TJ Operating Junction Temperature Range -40 to 150 °C TLEAD Maximum Soldering Temperature (at Leads) 300 °C VESD ESD Rating2 - HBM 4000 V Symbol Description Value Units ΘJA Thermal Resistance (SOT23-5 or SC70JW-8) 150 °C/W PD Power Dissipation (SOT23-5 or SC70JW-8) 667 mW AAT4610A Current Limited Load Switch 4610A.2007.06.1.4 3 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi- tions 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 1.5k Ω resistor into each pin. 3. Mounted on a demo board.

Electrical Characteristics

VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are T A = 25°C. Symbol Description Conditions Min Typ Max Units VIN Operation Voltage 2.4 5.5 V IQ Quiescent Current V IN = 5V, ON (ON) = Active, IOUT = 0 9 25 µA IQ(OFF) Off Supply Current ON (ON) = Inactive, V IN = 5.5V 1 µA ISD(OFF) Off Switch Current ON (ON) = Inactive, V IN = 5.5V, VOUT = 0 0.01 1 µA VUVLO Under-Voltage Lockout Rising Edge, 1% Hysteresis 1.8 2.4 V VIN = 5.0V, TA = 25°C 145 180 RDS(ON) On Resistance V IN = 4.5V, TA = 25°C 150 m Ω VIN = 3.0V, TA = 25°C 190 230 TCRDS On Resistance Temperature 2800 ppm/°C Coefficient ILIM Current Limit R SET = 6.8kΩ 0.75 1 1.25 A ILIM(MIN) Minimum Current Limit 130 mA VON(L) ON (ON) Input Low Voltage V IN = 2.7V to 5.5V1 0.8 VON(H) ON (ON) Input High Voltage VIN = 2.7V to < 4.2V1 2.0 V VIN ≥ 4.2V to 5.0V1 2.4 ION(SINK) ON (ON) Input Leakage V ON = 5.5V 0.01 1 µA TRESP Current Limit Response Time V IN = 5V 0.4 µs TOFF Turn-Off Time V IN = 5V, RL = 10Ω 41 2 µ s TON Turn-On Time V IN = 5V, RL = 10Ω 12 200 µs TSD Over-Temperature Threshold V IN = 5V TJ Increasing 125 °CTJ Decreasing 115 AAT4610A Current Limited Load Switch 4 4610A.2007.06.1.4 1. For VIN outside this range, consult Typical ON (ON) Threshold curve.

Unless otherwise noted, VIN = 5V, TA = 25°C. RDS(ON) vs. Temperature 100 120 140 160 180 200 220 240 -40 -20 0 20 40 60 80 100 120 Temperature (°C) RDS(ON) (mΩ) Input = 3V Input = 5V Output Current vs. Output Voltage (RSET = 16kΩ) 0.2 0.4 0.6 01 23 45 Output Voltage (V) Output Current (A) Quiescent Current vs. Input Voltage 01 23456 Input Voltage (V) Quiescent Current (µA) Quiescent Current vs. Temperature -40 -20 0 20 40 60 80 100 120 Temperature (°C) Quiescent Current (µA) Off-Switch Current vs. Temperature Temperature (°C) Off-Switch Current (µA) 0.001 0.01 0.1 -40 -20 0 20 40 60 80 100 120 Off-Supply Current vs. Temperature 0.01 0.1 -40 -20 0 20 40 60 80 100 1 20 Temperature (°C) Off-Supply Current (µA) AAT4610A Current Limited Load Switch 4610A.2007.06.1.4 5

Unless otherwise noted, VIN = 5V, TA = 25°C. Short-Circuit Through 0.3Ω Time (µs) Input and Output Voltage (V) -4 Output Current (A) Input Voltage Output Current Output Voltage Turn-Off (RL = 10Ω; CL = 0.47µF) -10 -5 0 5 10 15 20 25 30 35 40 45 50 Time (µs) Voltage (V) OutputON Turn-On (RL = 10Ω; CL = 0.47µF) -10 -5 0 5 10 15 20 25 30 35 40 45 50 Time (µs) Voltage (V) OutputON Turn-Off vs. Temperature (RLOAD = 10Ω; CLOAD = 0.47µF) -40 -20 0 20 40 60 80 100 Temperature (°C) Turn-Off Time (µs) VIN = 3V VIN = 5V Turn-On vs. Temperature (RLOAD = 10Ω; CLOAD = 0.47µF) -40 -20 0 20 40 60 80 100 Temperature (°C) Turn-On Time (µS) VIN = 3V VIN = 5V VIH VIH VIL and VIL vs. VIN 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.20 VIN (V) AAT4610A Current Limited Load Switch 6 4610A.2007.06.1.4

Unless otherwise noted, VIN = 5V, TA = 25°C. RSET Coefficient vs. ILIM 0 0.5 1 1.5 2 ILIM (A) RSET ILIM Product (kV) RSET vs. ILIM 100 0.1 10 1 ILIM (A) RSET (kΩ) Current Limit vs. Temperature -50 - 25 0 25 50 75 100 Temperature ( °C) Current Limit (%) RSET =22.1k VIN - VOUT= 0 .5V AAT4610A Current Limited Load Switch 4610A.2007.06.1.4 7

Application Information

In most applications, the variation in I LIM 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. V OUT." Together, these three factors add up to a ±25% tolerance (see I LIM specification in Electrical Characteristics section). Figure 1 illus- trates a cold device with a statistically higher cur- rent limit and a hot device with a statistically lower current limit, both with R SET equal to 10.5kΩ. While the chart, "R SET vs. ILIM" indicates an I LIM of 0.7A with an R SET of 10.5kΩ, this figure shows that the actual current limit will be at least 0.525A and no greater than 0.880A. Figure 1: Current Limit Using 10.5kΩ. To determine R SET ,start with the maximum current drawn by the load and multiply it by 1.33 (typical I LIM = minimum ILIM / 0.75). This is the typical cur- rent limit value. Next, refer to "R SET vs. I LIM" and find the RSET that corresponds to the typical current limit value. Choose the largest resistor available that is less than or equal to it. For greater precision, the value of R SET may also be calculated using the Ω 0.2 0.4 0.6 0.8 1.2 01 2345 VOUT (V) ILIM (A) 0.88A 0.525A Device with high current limit at -40°C Device with low current limit at 85°C AAT4610A Current Limited Load Switch 8 4610A.2007.06.1.4 Functional Block Diagram Current Limit 1.2V Reference Under- Voltage Lockout Over-Temperature Protection OUT SET GND RSET ON (ON) IN

Current Limited Load Switch 4610A.2007.06.1.4 9 ILIM RSET product found in the chart "R SET Coefficient vs. I LIM." The maximum current is derived by multiplying the typical current for the chosen R SET in the chart by 1.25. A few standard resistor values are listed in the table "Current Limit R SET Values." Current Limit RSET Values Example: A USB port requires 0.5A. 0.5A multiplied by 1.33 is 0.665A. From the chart named "R SET vs. ILIM," RSET should be less than 11k Ω. 10.5kΩ is a standard value that is a little less than 11k Ω but very close. The chart reads approximately 0.700A as a typical I LIM value for 10.5k Ω. Multiplying 0.700A by 0.75 and 1.25 shows that the AAT4610A will limit the load current to greater than 0.525A but less than 0.875A. Operation in Current Limit When a heavy load is applied to the output of the AAT4610A, the load current is limited to the value of I LIM determined by R SET. See Figure 2, "Overload Operation." Since the load is demanding more cur- rent than I LIM, the voltage at the output drops. This causes the AAT4610A to dissipate a larger than nor- mal quantity of power, and its die temperature to increase. When the die temperature exceeds an over-temperature limit, the AAT4610A will shut down until is has cooled sufficiently, at which point it will startup again. The AAT4610A 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 AAT4610A has low and high threshold voltages that accommodate this condition. The threshold voltages are compatible with 5V TTL and 2.5V to 5V CMOS. Reverse Voltage The AAT4610A 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 AAT4610A. Current Device Will Device Always Limit Not Current Current Limits RSET Typ Limit Below Below (kΩ) (mA) (mA) (mA) 40.2 200 150 250 30.9 250 188 313 24.9 300 225 375 22.1 350 263 438 19.6 400 300 500 17.8 450 338 563 16.2 500 375 625 14.7 550 413 688 13.0 600 450 750 10.5 700 525 875 8.87 800 600 1000 7.50 900 675 1125 6.81 1000 750 1250 6.04 1100 825 1375 5.49 1200 900 1500 4.99 1300 975 1625 4.64 1400 1050 1750 Figure 2: Overload Operation. Output Voltage (V) 0.25 0.5 0.75 Output Current (A) Output Current Output Voltage 1Ω load is turned on at time = 0

Current Limited Load Switch 10 4610A.2007.06.1.4

Ordering Information

Package Information

All dimensions in millimeters. Package Enable Marking 1 Part Number (Tape and Reel)2 SOT23-5 ON (active low) ERXYY AAT4610AIGV-T1 SOT23-5 ON (active high) HXXYY AAT4610AIGV-1-T1 SC70JW-8 ON (active low) FKXYY AAT4610AIJS-T1 SC70JW-8 ON (active high) HXXYY AAT4610AIJS-1-T1 4° ± 4° 0.15 ± 0.07 0.45 ± 0.15 0.10 BSC 1.20 ± 0.25 1.575 ± 0.125 2.80 ± 0.20 0.40 ± 0.10 0.60 REF 2.85 ± 0.15

1.90 BSC

0.95 BSC 1.10 ± 0.20 10° ± 5° GAUGE PLANE 0.075 ± 0.075

0.60 REF

All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor products that are in compliance with current RoHS standards, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more information, please visit our website at http://www.analogictech.com/pbfree. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD.

All dimensions in millimeters. 0.225 ± 0.075 0.45 ± 0.10 0.05 ± 0.05 2.10 ± 0.30 2.00 ± 0.20 7° ± 3° 4° ± 4° 0.15 ± 0.05

1.10 MAX

0.100 2.20 ± 0.20 0.048REF 0.50 BSC 0.50 BSC 0.50 BSC AAT4610A Current Limited Load Switch 4610A.2007.06.1.4 11 Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold sub- ject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and other quality con- trol techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and produ ct names appearing in this document are regis- tered trademarks or trademarks of their respective holders.