AAT4626IHS-T1

PRODUCT DATASHEET AAT4626 SmartSwitchTM General Description The AAT4626 SmartSwitch is part of AnalogicTech’s Application Specific Power MOSFET™ (ASPM™) product family. It is a dual-channel 500mA current-limited P-channel MOSFET power switch designed for high-side load switching applications. This switch operates with inputs ranging from 2.7V to 5.5V, making it ideal for both 3V and 5V systems. An integrated current-limiting circuit protects the input supply against large changes in load current which may cause the supply to fall out of regulation. The AAT4626 is also protected from thermal overload which limits power dissipation and junction temperatures. The current limit threshold is factory programmed at 1.0A, with a maximum of 1.5A. The quiescent supply current is typically a low 20μA. In shutdown mode, the supply current decreases to less than 1μA. The AAT4626 is available in a Pb-free, 8-pin SOP or TSSOP package and is specified over the -40°C to +85°C temperature range. The AAT4600 series is a family of adjustable and fixed SmartSwitch products with a range of current handling capabilities. Single versions are available with adjustable current limit (AAT4601) or fixed current limit (AAT4625), as well as dual versions with fixed current limit (AAT4626). USB Dual-Channel Power Switch Features • • • • • • 2.7V to 5.5V Input Voltage Range Compliant to USB 1.1 and 2.0 Specifications 500mA (Min) Continuous Current per Channel 1.25A (Max) Current Limit per Channel 90mΩ Typical RDS(ON) Low Quiescent Current: ▪ Typically 20μA ▪ 1μA Max with Switches Off Thermal Shutdown Slew Rate Limited Turn On Fault Flag with 2ms Blanking Under-Voltage Lockout Temperature Range: -40°C to +85°C UL Approved—File No. E217765 8-Pin SOP or TSSOP Package • • • • • • • Applications • • • • General-Purpose Power Switching Hot Swap Supplies Notebook Computers USB Ports and Peripherals UL Recognized Component Typical Application 100kΩ 100kΩ VCC 5.0V ENA (ENA) ENB 0.1μF (ENB) 7 IN ENA (ENA) ENB (ENB) GND 6 FLGA 2 3 8 5 1 AAT4626 FLGB OUTA OUTB OUTPUTA OUTPUTB 4 47μF GND 47μF GND 4626.2008.02.1.3 www.analogictech.com 1 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Pin Descriptions Pin # 1, 4 2,3 5, 8 6 7 USB Dual-Channel Power Switch Symbol EN(A/B) (EN(A/B)) FLG(A/B) OUT(A/B) GND IN Function Enable inputs: logic-compatible enable input. High input > 2.1V typical. Low input < 1.9V typical. Active high or active low option available; see Ordering Information for details. Fault flag outputs: active-low, open-drain output. Indicates over-current, UVLO, and thermal shutdown. Switch outputs: these pins are the P-channel MOSFET drain connection. Ground connection. Supply input: this pin is the source connection for the P-channel MOSFETs. Also supplies the IC’s internal circuitry. Pin Configuration SOP-8 (Top View) TSSOP-8 (Top View) ENA (ENA) FLGA FLGB ENB (ENB) 1 8 OUTA IN GND OUTB 1 ENA (ENA) FLGA FLGB ENB (ENB) 1 2 3 4 8 7 6 5 OUTA IN GND OUTB 2 7 2 3 6 4 5 2 www.analogictech.com 4626.2008.02.1.3 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Absolute Maximum Ratings1 TA = 25°C, unless otherwise noted. Symbol VIN VFLG IFLG VOUT IOUT VEN TJ TS TLEAD USB Dual-Channel Power Switch Description IN to GND FLGA, FLGB to GND FLGA, FLGB Current OUTA, OUTB to GND Output Current EN (EN) to GND Operating Junction Temperature Range Storage Temperature Maximum Soldering Temperature (at Leads) Value -0.3 to 6 -0.3 to 6 50 -0.3 to VIN + 0.3 Internally Limited -0.3 to 6 -40 to 150 150 300 Units V V mA V A V °C °C °C Thermal Information2 Symbol ΘJA PD Description Maximum Thermal Resistance (SOP-8) Maximum Power Dissipation (SOP-8) Value 100 1.25 Units °C/W W 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. Mounted on an FR4 printed circuit board with 1 oz. copper ground plane. 4626.2008.02.1.3 www.analogictech.com 3 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Electrical Characteristics USB Dual-Channel Power Switch 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 IQ VIN-THRSH IEN CEN RDS(ON) TON TON-RISE TOFF TOFF-FALL ISD(OFF) ILIMIT OTMP RFLG ISINK VUVLO TBLANK Description Quiescent Current Enable Input Threshold Enable Input Current Enable Input Capacitance On-Resistance Output Turn-On Delay Output Turn-On Rise Time Output Turn-Off Delay Output Turn-Off Fall Time Output Leakage Current Current Limit Threshold Over-Temperature Shutdown Error Flag Output Resistance Error Flag Off Current Under-Voltage Lockout Fault Blanking Conditions VIN = 5V, ENA and ENB Active Low-to-High Transition High-to-Low Transition VEN = 0V to 5.5V VIN = 5V, Each Switch, TA = 25°C VIN =3.0V, Each Switch, TA = 25°C VIN = 5V, RL = 10Ω RL = 10Ω VIN = 5V, RL = 10Ω RL = 10Ω EN = Inactive, VIN = 5.5V, VOUT = 0V Ramped Load Applied to Enable Output, VOUT < 4.0V TJ Increasing TJ Decreasing VIN = 5V, IL = 1mA VFLG = 5.5V VIN = Increasing, 1% Hysteresis Min Typ 20 Max 40 2.4 1 130 150 Units μA V μA pF mΩ ms ms μs μs μA A °C 0.8 0.01 1 90 100 0.25 0.2 5 0.03 1.0 125 115 30 0.05 2.3 2 0.75 20 20 1 1.50 2.0 1 2.7 Ω μA V ms 4 www.analogictech.com 4626.2008.02.1.3 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. USB Dual-Channel Power Switch Quiescent Current vs. Temperature Quiescent Current (μA) 30 25 20 15 10 5 0 -40 -20 0 20 40 60 80 100 120 25 Quiescent Current Input Current (μA) 20 15 10 5 0 0 1 2 channels enabled 1 channel enabled 2 3 4 5 6 Temperature (°C) Input Voltage (V) Current Limit 1.4 1.0000 Off-Supply Current vs. Temperature Output Current (A) 1.2 1 0.8 0.6 0.4 0.2 0 0 1 2 3 4 5 Off-Switch Current (μA) 0.1000 0.0100 0.0010 -40 -20 0 20 40 60 80 100 120 Output Voltage (V) Temperature (°C) Off-Switch Current vs. Temperature 1.0000 140.0 RDS(ON) vs. Temperature Off-Switch Current (μA) (Both switches) 0.1000 130.0 RDS(ON) (mΩ) 120.0 110.0 100.0 90.0 80.0 70.0 60.0 0.0100 VIN = 3V VIN = 5V 0.0010 0.0001 0.0000 -40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120 Temperature (°C) Temperature (°C) 4626.2008.02.1.3 www.analogictech.com 5 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Typical Characteristics Unless otherwise noted, VIN = 5V, TA = 25°C. USB Dual-Channel Power Switch Turn-On/Off Response with 10Ω, 1μF Load Start Into 1Ω Load EN (5V/div) EN (5V/div) FAULT (5V/div) FAULT (5V/div) VOUT (1V/div) VOUT (1V/div) IIN (500mA/div) IIN (500mA/div) Time (100μs/div) Time (200μs/div) Thermal Shutdown Response Short Circuit Through 0.3Ω 8 12 EN (5V/div) Input and Output (V) FAULT (5V/div) 6 Input Voltage 8 Output (A) 4 VOUT (1V/div) IIN (500mA/div) Output Current Output Voltage 4 2 0 0 -1 0 1 2 3 4 5 -4 Time (100ms/div) Time (μs) Short Circuit Through 0.6Ω Input and Output (V) 6 Input Voltage 4 6 Output (A) Output Current 3 2 Output Voltage 0 0 -1 0 1 2 3 4 5 -3 Time (μs) 6 www.analogictech.com 4626.2008.02.1.3 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Functional Block Diagram USB Dual-Channel Power Switch IN OverTemperature Protection UnderVoltage Lockout OUTA OUTB ENB (ENB) ENA (ENA) 1.2V Reference Current Limit Over-Temp Protection Under-Voltage Lockout Current Limit FLGA Over-Temp Protection Under-Voltage Lockout Current Limit FLGB Functional Description The AAT4626 is a dual integrated MOSFET load switch with a fixed level current limit, over-temperature protection, level shifted inputs, and a fault flag for each switch. The current limit control is combined with an over-temperature thermal limit circuit to provide a comprehensive system to protect the load switch under short-circuit or other adverse operating conditions. The AAT4626 is ideally suited for control and protection of peripheral ports such as USB, RS232, and parallel ports. The current limit and over-temperature circuits will act independently. The device current limit is activated when the output load current exceeds a preset internal threshold level. The minimum current limit threshold characteristic is specified by ILIM(MIN). If the load switch ambient temperature becomes excessive or if a short-circuit condition persists, the die temperature will rise, causing the over-temperature protection circuit to activate. If the current limit or over-temperature protection circuits are active for more than ten milliseconds, the sys- tem will be informed via the FAULT flag. The ten millisecond fault blanking delay allows the AAT4626 to be turned on into large capacitive loads without activating the FAULT flags. The open drain FAULT outputs can be connected directly to system controllers driven by voltage levels less than the IN pin voltage without additional level shifting circuitry. Each of the two load switches is turned on and off by applying a logic level signal to the EN(A/B) pin. The AAT4626 enable function is available in both active high and active low logic level versions. The AAT4626 typically consumes 20μA when operating; when off, the device draws less than 1μA. In the off state, current is prevented from flowing between the input and output on each respective channel. The EN(A/B) function has logic level thresholds that allow the AAT4626 to be TTL compatible and may also be controlled by 2.5V to 5.0V CMOS circuits. The voltage level on either EN(A/B) or FAULT(A/B) should not exceed the input supply level present on the IN pin. 4626.2008.02.1.3 www.analogictech.com 7 PRODUCT DATASHEET AAT4626 SmartSwitchTM Applications Information Operation in Current Limit If an excessive load is applied to either output of an AAT4626, the load current will be limited by the device’s current limit circuitry. Refer to the “Current Limit” curve in the Typical Characteristics section of this datasheet. If a short circuit were to occur on the load applied to either the A or B output, there would be a demand for more current than what is allowed by the internal current limiting circuit and the voltage at the device output will drop. This causes the AAT4626 to dissipate more power than in normal operation, causing the die temperature to increase. When die temperature exceeds the internal over-temperature threshold, the AAT4626 will shut down both the A and B output channels. After shutting down, the AAT4626 cools to a level below the over-temperature threshold, at which point it will start up again. The AAT4626 will continue to cycle off and on until one of the following events occurs: the load current of the offending output is reduced to a level below the AAT4626’s current limit setting; the input power is removed; or the output is turned off by a logic high level applied to the EN pin of the fault channel. USB Dual-Channel Power Switch Eq. 2: IMAX = TSD(MIN) - TA(MAX) RDS(ON)(MAX) · RΘJA TSD(MIN) is the minimum temperature required to activate the device over-temperature protection. The typical thermal limit temperature specification is 125°C for the AAT4626. For calculations, 115°C is a safe minimum value to use. For example, a portable device is specified to operate in a 50°C environment. The printed circuit board assembly will operate at temperatures as high as 85°C. This portable device has a sealed case and the area of the printed board assembly is relatively small, causing RθJA to be approximately 100°C/W. RDS(ON)(MAX) = 130W. Using Equation 2, Eq. 3: IMAX = 115°C - 85°C = 1.25A 130W · 120°C/W If this system requires less than 1.4A, the thermal limit will not activate during normal operation. Input Capacitor The input capacitor serves two purposes. First, it protects the source power supply from transient current effects generated by the application load circuits. If a short circuit is suddenly applied to either output of an AAT4626, there is a microsecond long period during which a large current can flow before the current limit circuit becomes active. Refer to the Typical Characteristics curve “Short Circuit Through 0.3Ω." A properly sized input capacitor can dramatically reduce the load switch input transient response effects seen by the power supply and other circuitry upstream from the AAT4626. The second purpose of the input capacitor is to prevent transient events generated by the load circuits from effecting the operation of the AAT4626. For example, if an AAT4626 is used in a circuit that operates from a 5V power supply with poor step load response, it is possible that turning on the load switch could cause the input power supply to droop below the AAT4626's under-voltage lockout threshold. This drop in voltage would cause the AAT4626 to turn off until the input power supply voltage levels recover. Since this cycle would be selfperpetuating, the entire circuit could be seen to be unstable. In the very rare case where capacitor cost is prohibitive and the input capacitor is omitted, the output load circuit should be slew rate limited when turned on. Thermal Considerations Since the AAT4626 has internal current limit and overtemperature protection, junction temperature is rarely a concern. If an application requires a large load current in a high temperature operating environment, there is the possibility that the over-temperature protection circuit rather than the current limit circuit from one of the two outputs will regulate the current available to the load. In these applications, the maximum current available without risk of activation of the over-temperature circuit can be calculated. The maximum internal temperature while current limit is not active can be calculated using Equation 1: Eq. 1: TJ(MAX) = IMAX2 · RDS(ON)(MAX) · RΘJA + TA(MAX) In Equation 1, IMAX is the maximum current required by the load. RDS(ON)(MAX) is the maximum rated RDS(ON) of the AAT4626 at high temperature. RθJA is the thermal resistance between the device die and the board onto which it is mounted. TA(MAX) is the maximum ambient temperature for the printed circuit board assembly under the AAT4626 when the load switch is not dissipating power. Equation 1 can be transformed to provide IMAX; Refer to Equation 2. 8 www.analogictech.com 4626.2008.02.1.3 PRODUCT DATASHEET AAT4626 SmartSwitchTM Output Capacitor In order to insure stability while the device current limit is active, a small capacitance of approximately 1μF should be used on each output. When either output of the AAT4626 is activated using the EN(A/B) function, there are no momentary current transients, as in the case when a short circuit is suddenly applied to a device that is already on. Refer to the Typical Characteristics curve “Turn-On/Off Response.” Regardless of output capacitor size, output current on either output is limited to the value allowed by the threshold determined by the internal current limiting circuitry. Refer to the internal current limit threshold specifications stated in the Electrical Characteristics section of this datasheet. This permits very large output capacitors to be used. For example, USB ports are specified to have at least 120μF of downstream capacitance from their controlling power switch. An output capacitance as large as 1000μF would not disturb the input power supply to an AAT4626 used to control a USB port. USB Dual-Channel Power Switch active for more than approximately ten milliseconds, the FLG(A/B) pin is pulled to ground internally through an open drain device. The 10ms delay on the fault function is intended to prevent capacitive loads connected to one of the load switch outputs from activating its respective flag when the device is turned on. The placement of a pull-up resistor between the FLGA or FLGB pin and the IN pin is recommended. Reasonable values for the pullup resistor should range from 10kΩ to 100kΩ. Since the fault flags are open drain terminals, they may be pulled up to any voltage that is not greater than the level present on the IN pin. This is done to allow the AAT4626 to signal ancillary circuitry that is powered by voltage levels less than the level on the IN pin. If a fault flag delay greater than 10ms is required, addition delay may be added by use of an RC filter. As shown in Figure 1, an RC filter can be added to the fault flag output. V+ 100kΩ R1 10kΩ 1 2 3 C1 0.1µF 4 EN Inputs The AAT4626 has two enable inputs, ENA and ENB. These two enable inputs allow the AAT4626 to independently control each respective output. The device is available in both active high EN enable and active low (EN) enable versions. For specific part numbers, refer to the ordering information section. When both the A and B outputs of the AAT4626 are in the off state, the respective outputs are an open circuit and the device quiescent current consumption is reduced to less than 1μA. The ENA and ENB threshold voltages are set to allow the AAT4626 to be controlled by 5V TTL levels, as well as CMOS-compatible levels ranging from 2.5V to 5V. The ENA or ENB function control voltage levels should not exceed the input supply level applied to the IN pin. USB Controller Over-Current Flag Input AAT4626 ENA OUTA FLGA IN 8 7 6 5 FLGB GND ENB OUTB Figure 1: Fault Flag Delay RC Filter. Reverse Voltage The AAT4626 is designed to control current flowing from IN to OUT. If a voltage is applied to OUT which is greater than that on IN, a large resulting reverse current may flow, potentially damaging the AAT4626. Fault Flag Output The AAT4626 features an active low fault flag (FLGA and FLGB) output for each A and B output channel. The fault flags are provided to alert the system if the over-current or over-temperature circuits become active, or if the load switch is not receiving a sufficient voltage level to properly operate. If either the current limit or overtemperature circuits in any combination are constantly Under-Voltage Lockout The AAT4626 has been designed with an under-voltage lockout control circuit. The under-voltage lockout prevents the output MOSFET devices from turning on until VIN exceeds the typical UVLO threshold of 2.3V. During operation, the device will automatically shut down if VIN falls below the UVLO threshold and the fault flags will be toggled. 4626.2008.02.1.3 www.analogictech.com 9 PRODUCT DATASHEET AAT4626 SmartSwitchTM Hot-Plug Applications Application circuit cards with a high inrush current potential can be limited by use of the AAT4626. The AAT4626 has both slew rate limited turn on characteristics and current limit controlled outputs, which make it ideally suited for power port hot-plug applications. A host power back plane or hot-plug receptacle may be sensitive to short duration, high power surges. The AAT4626 will turn on in a linear ramping fashion and regulate the inrush current within the specified current limit for the device. The error flag usually will not be affected during application turn-on since the 10ms fault flag blanking time is intended for these types of events. If an application turn-on current surge exceeds 10ms, an RC delay filter may be added to the flag output to prevent the system from receiving an error during the start-up sequence. USB Dual-Channel Power Switch Refer to the following guidelines for power port PCB layout: 1. PCB traces should be kept as short and direct as possible to minimize the effects of the PCB on circuit performance. Make component solder pads large to minimize contact resistance. The AAT4626 output bulk capacitors and ferrite beads should be placed as close to the device as possible. PCB traces to the output connector should be kept as short as possible to minimized trace resistance and the associated voltage drop (I2R loss). If ferrite beads are used in the circuit, select ferrite beads with a minimum series resistance. The use of PCB trace vias should be avoided on all traces that conduct high currents. If vias are necessary, make the vias as large as possible and use multiple vias connected in parallel to minimize their effect. 2. 3. 4. 5. PCB Layout Information In order to obtain the maximum performance from the AAT4626, very careful attention must be considered in regard to the printed circuit board layout. In most port power switch and port protection applications, high voltage and current transient events will occur. Proper PCB layout can help reduce the effects of transient events. PCB trace resistance will effect overall circuit transient response; small voltage drops will also be incurred. Evaluation Board Layout The AAT4626 evaluation layout follows the recommend printed circuit board layout procedures and can be used as an example for good application layouts. (See Figures 4, 5, and 6.) Note that ferrite beads are not used on this simple device evaluation board. The board layout shown is not to scale. Cable / Connector to Hot-Plug Port VBUS Hot-Plug Receptacle V+ AAT4626 1 2 CIN 4.7µF 3 4 ENA FLGA FLGB ENB OUTA IN GND OUTB 8 7 6 5 0.1μF Card Application Circuit A CBULKA (120µF) CBULKB (120µF) Card Application Circuit B GND GND Dual Channel Inrush Current Protected Application Card Figure 2: AAT4626 Input Inrush Current Protected Dual Output Application. 10 www.analogictech.com 4626.2008.02.1.3 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM P-Channel MOSFET Switch On Resistance 0.09Ω (45mV) IN OUTA USB Dual-Channel Power Switch Ferrite Bead and PCB Trace Resistance 0.02Ω (10mV) Cable, Connector and Contact Resistance 0.03Ω (15mV) Trace Resistance 0.01Ω (5mV) V+ Input Power Supply 4.50V to 5.25V GND CBULK VBUS CBULK 0.1µF GND 0.1µF Downstream Peripheral Port 500mA Max. Load Current AAT4626 Ch. A GND (10mV) (15mV) (5mV) Total Voltage Drop = 75mV Figure 3: Summary of Typical Circuit Voltage Drops Caused by AAT4626 Circuit Components and PCB Trace Resistance. Figure 4: AAT4626 Evaluation Board Component Side Layout. Figure 5: AAT4626 Evaluation Board Solder Side Layout. Figure 6: AAT4626 Evaluation Board Top Side Silk Screen Layout /Assembly Drawing. 4626.2008.02.1.3 www.analogictech.com 11 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Application Circuits VBUS = 5.0V CIN 0.1µF R1 100kΩ R2 100kΩ 7 IN OUTA 8 USB Dual-Channel Power Switch Ferrite Beads VBUS(A) COUT1 0.1µF COUT2 120µF D+ DGND AAT4626 USB Controller On/Off A Error Flag A Error Flag B On/Off B 1 2 3 4 ENA FLGA FLGB ENB OUTB 6 5 DATA (Port A) Ferrite Beads VBUS(B) COUT3 0.1µF COUT4 120µF D+ DGND DATA (Port B) Figure 7: Typical Dual USB Host Port Application. VCC +5.0V 0.1µF AAT4626 ENA FLGA FLGB ENB OUTA IN GND OUTB 100kΩ 4.50V to 5.25V Upstream V BUS 100mA Maximum VBUS D+ DGND 1µF 100kΩ AAT3200-3.3 IN OUT GND 3.3V USB Controller VIN ON/OFF A Over Current A Over Current B Ferrite Beads 120µF 0.1µF USB Port A VBUS(A) D+ DGND 1µF ON/OFF B GND Data 120µF Ferrite Beads USB Port B VBUS(B) 0.1µF D+ DGND Data A/B (Two Pair to USB Controller) Figure 8: Self-Powered Dual Port USB Hub. 12 www.analogictech.com 4626.2008.02.1.3 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM 100kΩ 4.50V to 5.25V Upstream V BUS 100mA Maximum VBUS D+ DGND 1µF 100kΩ AAT3200-3.3 IN OUT GND USB Dual-Channel Power Switch 0.1µF AAT4626 ENA FLGA FLGB ENB OUTA IN GND OUTB 3.3V USB Controller VIN ON/OFF A Over Current A Over Current B USB Port A Ferrite Beads VBUS(A) D+ DGND 120µF 0.1µF 1µF ON/OFF B GND Data A Data USB Port B Ferrite Beads VBUS(B) D+ DGND 120µF 0.1µF Data B Figure 9: USB Bus Powered Dual Port USB Hub. 4626.2008.02.1.3 www.analogictech.com 13 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM Ordering Information Package SOP8 SOP8 TSSOP8 TSSOP8 USB Dual-Channel Power Switch Enable EN (Active-high) EN (Active-low) EN (Active-high) EN (Active-low) Marking 4626-1 4626 4626-1 4626 Part Number (Tape and Reel)1 AAT4626IAS-1-T1 AAT4626IAS-T1 AAT4626IHS-1-T1 AAT4626IHS-T1 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/about/quality.aspx. Package Information SOP-8 3.90 ± 0.10 4.90 ± 0.10 6.00 ± 0.20 0.375 ± 0.125 1.55 ± 0.20 45° 0.175 ± 0.075 4 ° ± 4° 0.235 ± 0.045 0.825 ± 0.445 0.42 ± 0.09 × 8 1.27 BSC All dimensions in millimeters. 1. Sample stock is generally held on part numbers listed in BOLD. 14 www.analogictech.com 4626.2008.02.1.3 PRODUCT DATASHEET AAT4626 AAT4626 SmartSwitchTM TSSOP-8 USB Dual-Channel Power Switch 4.40 ± 0.10 6.40 ± 0.20 3.00 ± 0.10 0.65 BSC 12° REF × 4 1.05 MAX 1.20 MAX 0.145 ± 0.055 4° ± 4° 0.245 ± 0.055 × 8 0.10 ± 0.05 12° 0.60 ± 0.15 1.00 REF DETAIL A All dimensions in millimeters. Advanced Analogic Technologies, Inc. 3230 Scott Boulevard, Santa Clara, CA 95054 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. Except as provided in AnalogicTech’s terms and conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control 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 product names appearing in this document are registered trademarks or trademarks of their respective holders. 4626.2008.02.1.3 www.analogictech.com 15