DATA SHEET AAT4644 4-Channel Current Limited Load Switch General Description Features The AAT4644 is a four-channel resettable fuse. It utilizes independent current-limited and thermally-protected P-channel MOSFETs to protect against short circuits. Current limit is factory programmed at 1A. Additional protection is provided with under-voltage lockout. The switches are turned off when the input voltage drops below a preset level. The quiescent supply current is typically 20μA. The AAT4644 is a flexible solution, allowing system designers to gang outputs together for lower RDS(ON) and higher current limit. • • • • The AAT4644 is available in a Pb-free, 8-pin TSSOP or SOP package and is specified over the -40°C to +85°C temperature range. Applications • • • • 500mA per Channel Steady State 4 x 1A Current Limit Trip Point Over-Temperature Protection Fast Transient Response: ▪ 1μs (Typ) Response to Short Circuit 100m Typical RDS(ON) Under-Voltage Lockout Temperature Range: -40°C to +85°C 8-Pin TSSOP or SOP Package • Desktop PCs • Peripheral Ports • USB Ports Typical Application INPUT 3.3V - 5V 2, 7 IN OUT1 AAT4644 OUT2 OUT3 GND OUT4 1 3 8 6 OUTPUT1 OUTPUT2 OUTPUT3 OUTPUT4 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 1 DATA SHEET AAT4644 4-Channel Current Limited Load Switch Pin Descriptions Pin # Symbol 1 2, 7 3 4 5 6 8 OUT1 IN OUT2 GND N/C OUT4 OUT3 Function Channel 1 output. These pins are the input supply to the circuit. Channel 2 output. Ground connection. Not internally connected. Channel 4 output. Channel 3 output. Pin Configuration SOP-8 (Top View) 1 8 OUT3 2 2 TSSOP-8 (Top View) 7 IN 3 6 OUT4 4 5 N/C OUT1 1 IN 2 OUT2 GND OUT1 IN OUT2 GND OUT3 IN OUT4 N/C Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 DATA SHEET AAT4644 4-Channel Current Limited Load Switch Absolute Maximum Ratings1 TA = 25°C, unless otherwise noted. Symbol VIN VOUT IOUT TJ VESD TLEAD Description IN to GND OUT to GND Output Current Operating Junction Temperature Range ESD Rating2—HBM Maximum Soldering Temperature (at Leads) Value Units -0.3 to 6 -0.3 to 6 Internally Limited -40 to 85 4000 300 V V A °C V °C Value Units 100 1.25 °C/W W Thermal Characteristics3 Symbol JA PD Description Maximum Thermal Resistance Maximum Power Dissipation 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 1.5k 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 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 3 DATA SHEET AAT4644 4-Channel Current Limited Load Switch Electrical Characteristics VIN = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C; bold values designate full temperature range. Symbol VIN IQ VUVLO VUVLO(HYS) RDS(ON) ILIM tRESP TSD 4 Description Operation Voltage Quiescent Current Under-Voltage Lockout Under-Voltage Lockout Hysteresis On Resistance Current Limit Current Loop Response Over-Temperature Threshold Conditions Min Typ 2.7 VIN = 5V, IOUT = 0 Rising Edge VIN = 5.0V, TA = 25°C Each Output OUT < IN to 1V VIN = 5V 0.6 20 1.75 0.3 100 1.0 1 125 Max Units 5.5 40 V μA V V m A μs °C 125 1.5 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 DATA SHEET AAT4644 4-Channel Current Limited Load Switch Typical Characteristics TA = 25°C, unless otherwise noted. Quiescent Current vs. Temperature 40 Quiescent Current (μA) Quiescent Current (μA) Quiescent Current vs. Temperature 35 30 25 20 15 10 5 40 35 30 25 20 15 10 5 0 0 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 Temperature (°C) 60 80 100 120 100 120 Temperature (°C) Current Limit RDS(ON) vs. Temperature 2 150.0 140.0 1.5 130.0 RDS(ON) (mΩ) Output Current (A) 40 1 0.5 VIN = 3V 120.0 110.0 100.0 VIN = 5V 90.0 80.0 0 0 1 2 3 4 5 70.0 -40 Output Voltage (V) -20 0 20 40 60 80 Temperature (°C) Short Circuit Through 0.6Ω 12 8 Input Voltage 4 4 Output Current 2 0 Output Voltage 0 -4 -1 0 1 2 3 4 5 8 8 6 Input Voltage 6 4 Output Voltage 4 2 Output Current 2 0 Output Current (A) 6 Input and Output Voltage (V) 8 Output Current (A) Input and Output Voltage (V) Short Circuit Through 0.3Ω 0 -1 0 1 2 3 4 5 Time (μs) Time (μs) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 5 DATA SHEET AAT4644 4-Channel Current Limited Load Switch Typical Characteristics TA = 25°C, unless otherwise noted. Thermal Shutdown Response (0.3Ω Load) VIN (5V/div) VOUT (5V/div) IOUT (500mA/ div) -100 0 100 200 300 400 500 Time (μs) 6 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 DATA SHEET AAT4644 4-Channel Current Limited Load Switch Functional Block Diagram IN OUT1 Channel 1 Control Current Limit OUT2 Channel 2 Control Current Limit Under-Voltage Lockout OUT3 Over-Temperature Protection Channel 3 Control Current Limit OUT4 Channel 4 Control Current Limit GND Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 7 DATA SHEET AAT4644 4-Channel Current Limited Load Switch Ordering Information Package Marking Part Number (Tape and Reel)1 SOP-8 TSSOP-8 4644 4644 AAT4644IAS-T1 AAT4644IHS-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 6.00 ± 0.20 3.90 ± 0.10 SOP-8 4.90 ± 0.10 0.42 ± 0.09 × 8 1.27 BSC 45° 4° ± 4° 0.175 ± 0.075 1.55 ± 0.20 0.375 ± 0.125 0.235 ± 0.045 0.825 ± 0.445 All dimensions in millimeters. 1. Sample stock is generally held on part numbers listed in BOLD. 8 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 DATA SHEET AAT4644 4-Channel Current Limited Load Switch 6.40 ± 0.20 4.40 ± 0.10 TSSOP-8 12° REF × 4 3.00 ± 0.10 1.05 MAX 0.245 ± 0.055 × 8 1.20 MAX 0.65 BSC 0.145 ± 0.055 4° ± 4° 0.60 ± 0.15 0.10 ± 0.05 12° 1.00 REF DETAIL A All dimensions in millimeters. Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. 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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201958A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 16, 2012 9