AAT4610A ANALOGICTECH

Document overview

  • Manufacturer or author: Provided By www.digicamel.com(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 12

Technical content

Features

  • 2.4V to 5.5V Input voltage range
  • 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
  • Undervoltage Lockout
  • Thermal shutdown
  • Temp range -40 to 85°C
  • 4kV ESD Rating
  • UL Approved—File No. E217765
  • 5 pin SOT-23 or 8-pin SC70JW package

Applications

  • Peripheral ports
  • Notebook computers
  • Personal communication devices
  • Hot swap supplies UL Recognized Component Typical Application AAT4610A ON/(ON) IN SET INPUT GND GND GND OUT SOT-23 OUTPUT ON (ON) 0.47µFRSET1µF

Current Limited Load Switch 2 4610A.2003.05.0.92 Pin Configuration 5-Pin SOT-23 8-Pin SC70JW (Top View) (Top View) Pin Descriptions Pin # SOT23-5 SC70JW-8 Symbol Function 1 5 OUT P-channel MOSFET drain. Connect 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 1µF capacitor from IN to GND. 1 2 ON IN IN GND GND GND OUT SET 1

3 SET

Absolute Maximum Ratings (TA=25°C unless otherwise noted) Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at con- ditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time. Note 1: Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Thermal Characteristics Note 2: Mounted on a demo board. Electrical Characteristics (VIN = 5V, TA = -40 to 85°C unless otherwise noted. Typical values are at TA=25°C) Note 3: For VIN outside this range consult Typical ON (ON) Threshold curve.. 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 .01 1 µA VUVLO Undervoltage Lockout Rising edge, 1% hysteresis, 1.8 2.4 V VIN=5.0V, TA=25°C 145 180 m Ω RDS(ON) On-Resistance V IN=4.5V, TA=25°C 150 m Ω VIN=3.0V, TA=25°C 190 230 m Ω TCRDS On-Resistance Temp-co 2800 ppm/°C ILIM Current Limit R SET = 6.8kΩ .75 1 1.25 A ILIM(MIN) Minimum Current Limit 130 mA VON(L) ON (ON) Input Low Voltage V IN=2.7V to 5.5V 3 0.8 V VON(H) ON (ON) Input High Voltage VIN=2.7V to <4.2V 3 2.0 V VIN≥4.2V to 5.0V 3 2.4 V 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 µs TON Turn-On Time V IN=5V, RL=10Ω 12 200 µs Symbol Description Value Units ΘJA Thermal Resistance2 (SOT23-5 or SC70JW-8) 150 °C/W PD Power Dissipation2 (SOT23-5 or SC70JW-8) 667 mW 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 Rating1 - HBM 4000 V AAT4610A Current Limited Load Switch 4610A.2003.05.0.92 3

(Unless otherwise noted, VIN = 5V, TA = 25°C) 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) 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 vsVOUT 0.2 0.4 0.6 01 23 45 Vout ( V ) Output Current (A) RSET =16 kΩ Quiescent Current vs. Input Voltage 01 23456 IN (V) Quiescent Current (mA) Quiescent Current vs. Temperature -40 -20 0 20 40 60 80 100 120 Temperature (°C) Quiescent Current (µA) AAT4610A Current Limited Load Switch 4 4610A.2003.05.0.92

(Unless otherwise noted, VIN = 5V, TA = 25°C) 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) Short Circuit through 0.3Ω Time (µs) Input and Output (V) Output (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 AAT4610A Current Limited Load Switch 4610A.2003.05.0.92 5

(Unless otherwise noted, VIN = 5V, TA = 25°C) Current Limit v. Temperature -6% -4% -2% -50 - 25 0 25 50 75 100 Temperature ( °C) Current Limit (%) RSET=22.1k VIN -VOUT=0 .5V RSET coefficent 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 (k Ω) AAT4610A Current Limited Load Switch 6 4610A.2003.05.0.92

1.2V Reference Under- voltage Lockout Over-Temp Protection OUT SET GND RSET ON (ON) IN AAT4610A Current Limited Load Switch 4610A.2003.05.0.92 7

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 (pin 5) and OUT (pin 3), plus the operating temper- ature. 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). In the figure below, a cold device with a statistical- ly higher current limit, and a hot device with a sta- tistically lower current limit, both with R SET equal to 10.5kΩ are shown. While the chart, "R SET vs. ILIM" indicates an I LIM of 0.7A with an R SET of 10.5k Ω, this figure shows that the actual current limit will be at least 0.525A, and no greater than 0.880A. To determine R SET ,start with the maximum current drawn by the load, and multiply it by 1.33. (typi- cal_I LIM = 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 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 "R SET coeffi- cient 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 11kΩ. 10.5 kΩ 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 AAT4610 will limit the load current to greater than 0.525A but less than 0.875A. Current Limit Using10.5 kΩ 0.2 0.4 0.6 0.8 1.2 012345 Vout (V) ILIM (A) 0.88 A 0.525 A Device with high current limit at -40 C Device with low current limit at 85 C AAT4610A Current Limited Load Switch 8 4610A.2003.05.0.92 RSET Current Device will Device always (kΩ) Limit typ not current current limits (mA) limit below: below: (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

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 the figure "Overload Operation". Since the load is demanding more current than I LIM, the voltage at the output drops. This causes the AAT4610A 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 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 (pin 4). 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 (pin 4) of the AAT4610A has low and high threshold volt- ages that accommodate this condition. The thresh- old voltages are compatible with 5 volt TTL, and 2.5 volt to 5 volt CMOS. Reverse Voltage The AAT4610A is designed to control current flow- ing from IN to OUT. If a voltage is applied to OUT which is greater than the voltage on IN, large cur- rents may flow. This could cause damage to the AAT4610A. AAT4610A Current Limited Load Switch 4610A.2003.05.0.92 9 Overload Operation Time ( s ) Output ( V ) 0.25 0.5 0.75 Output (A) Output Current Output Voltage 1Ω load is turned on at time = 0

Current Limited Load Switch 10 4610A.2003.05.0.92

Ordering Information

Note: Sample stock is generally held on all part numbers listed in BOLD. Note 1: XYY = assembly and date code.

Package Information

All dimensions in millimeters. 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

Package Enable Marking 1 Part Number (Tape and Reel) 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

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.2003.05.0.92 11

Current Limited Load Switch 12 4610A.2003.05.0.92 Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech pr oduct. 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 wi thout notice, and advise customers 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 subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of l iability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accorda nce with AnalogicTech’s standard warranty. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific tes ting of all parameters of each device is not necessarily performed.