PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control General Description Features The AAT4290A and AAT4291A SmartSwitch products are members of AnalogicTech's Application Specific Power MOSFETTM (ASPMTM) product family. The AAT4290A and AAT4291A are five and three P-channel MOSFETs, respectively, configured for use as a microprocessor I/O expander. Having independent drain outputs and a common source input, they operate with an input voltage ranging from 1.8V to 5.5V, making them ideal for 2.5V, 3.3V, or 5V systems, as well as systems powered by lithium-ion/polymer batteries. Each switch features a 500ns turn-on time. The switch states are controlled by a Simple Serial ControlTM (S2CwireTM) interface which permits ease of control and efficiency of size. The quiescent supply current is very low, typically 4.5A. In shutdown mode, the supply current is reduced to less than 1A. * * * * * 1.8V to 5.5V Input Voltage Range 5 or 3 Independent Load Switches S2Cwire Interface 1.1 RDS(ON) Per Switch Low Quiescent Current 4.5A Typical 0.1A in Shutdown * -40C to +85C Temperature Range * 8-Pin SC70JW Package Applications * * * * * The AAT4290A and AAT4291A are offered in a Pb-free, 8-pin SC70JW package specified over the -40C to +85C temperature range. Cell Phones I/O Expansion Multiple Low Power Switching Personal Communication Devices Portable Electronic Devices Typical Application INPUT IN AAT4290A EN/SET EN/SET OUT1 OUT1 OUT2 OUT2 OUT3 OUT3 OUT4 OUT4 OUT5 OUT5 GND CIN 1F COUT1 0.1F COUT2 0.1F GND 4290A.2009.07.1.3 COUT3 0.1F COUT4 0.1F COUT5 0.1F GND www.analogictech.com 1 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Pin Descriptions Pin # AAT4290A AAT4291A Symbol 1 1 IN 2 3 7 6 OUT2 OUT1 4 4 EN/SET 5 6 7 8 N/A 5 N/A N/A 8 2, 3 GND OUT5 OUT4 OUT3 N/C Function Input power supply is connected to the P-channel MOSFET sources. Connect a 1F capacitor from IN to GND. P-channel MOSFET drain. P-channel MOSFET drain. Input control pin using S2Cwire serial interface. The device records rising edges of the clock and decodes them into 32 states (8 states for AAT4291A) which controls the ON/OFF states of the MOSFETs. See Table 1 and Table 2 for output settings. Ground connection. P-channel MOSFET drain. P-channel MOSFET drain. P-channel MOSFET drain. Not connected. Pin Configuration AAT4290A SC70JW-8 (Top View) IN OUT2 OUT1 EN/SET 2 1 8 2 7 3 6 4 5 AAT4291A SC70JW-8 (Top View) OUT3 OUT4 OUT5 GND IN N/C N/C EN/SET www.analogictech.com 1 8 2 7 3 6 4 5 OUT3 OUT2 OUT1 GND 4290A.2009.07.1.3 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Absolute Maximum Ratings1 Symbol VIN VOUT VEN/SET IMAX TSTORAGE VESD Description IN to GND OUT to GND EN/SET to GND Maximum Continuous Switch Current Storage Temperature Range ESD Rating - HBM2 Value Units -0.3 to 6.0 -0.3 to VIN + 0.3 -0.3 to 6.0 250 -65 to 150 4000 V V V mA C V Value Units 225 440 C/W mW Thermal Characteristics Symbol JA PD Description Thermal Resistance3 Maximum Power Dissipation (TA = 25C)4 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 to each pin. 3. Mounted on the board. 4. Derate 4.4mW/C above 25C. 4290A.2009.07.1.3 www.analogictech.com 3 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Electrical Characteristics VIN = 5.0V, TA = -40C to +85C, unless otherwise noted. Typical values are TA = 25C. Symbol VIN IQ IQ(OFF) ISD(OFF) VUVLO VUVLO(hys) RDS(ON) Description Conditions Operation Voltage Quiescent Current Off Supply Current Off Switch Current Under-Voltage Lockout Under-Voltage Lockout Hysteresis VIN VIN VIN VIN On Resistance TO TLAT ISINK Minimum EN/SET High Time EN/SET Off Timeout EN/SET Latch Timeout EN/SET Input Leakage Typ 1.8 VIN = 5.5V, EN/SET = VIN, IOUT = 0, All Switches ON EN/SET = 0, VIN = 5.5V, VOUT Open EN/SET = 0, VIN = 5.5V, VOUTn = 0 VIN Falling TCRDS On Resistance Temperature Coefficient AAT4290A-1 and AAT4291A-1 Output Turn-On Delay Time TD(ON) TR Turn-On Rise Time TD(OFF) Turn-Off Delay Time EN/SET VEN(L) Enable Threshold Low VEN(H) Enable Threshold High TLO EN/SET Low Time THI Min = = = = 1.8V, 3.0V, 4.2V, 5.0V, TA TA TA TA = = = = 4.5 0.1 1.2 250 2.5 1.5 1.2 1.1 2800 25C 25C 25C 25C VIN = 5V, RLOAD = 500, COUT = 0.1F VIN = 5V, RLOAD = 500, COUT = 0.1F VIN = 5V, RLOAD = 500 VIN = 1.8V VIN = 5.5V VEN/SET < 0.4V VIN 2.5V VIN > 2.5V VEN/SET = 5.5V Max Units 5.5 V 8 A 1 1 A A V mV 3.8 2.2 1.8 1.7 ppmC 40 270 40 ns ns ns 0.4 1.6 100 2.6 2.6 0.01 500 250 4.0 4.0 1 V V ns ns s s A 1. The AAT4290A/91A is guaranteed to meet performance specifications over the -40C to +85C operating temperature range and is assured by design, characterization, and correlation with statistical process controls. 4 www.analogictech.com 4290A.2009.07.1.3 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1F, COUTX = 0.1F, TA = 25C. Quiescent Current vs. Temperature Quiescent Current vs. Input Voltage 6 5.5 5.5 5 VIN = 5.0V 5 4.5 IQ ( A) IQ (A) 4.5 4 3.5 VIN = 3.3V 3 4 3.5 3 2.5 2.5 2 2 1.5 -40 -20 0 20 40 60 80 100 1.5 2.0 2.5 3.0 Temperature (C) VIH and VIL vs. Input Voltage 2.7 1.1 2.5 0.8 VIH 0.7 0.6 0.5 5.5 IO1-5 = 100mA RDS5 1.9 1.7 RDS1 RDS2 1.5 1.3 RDS3 1.1 VIL 0.4 0.9 RDS4 0.7 0.3 1.5 2 2.5 3 3.5 4 4.5 5 1.5 5.5 2.0 2.5 3.0 RDS(ON) vs. Temperature 1.1 1.3 RDS2 RDS(ON) () RDS5 0.9 RDS4 RDS3 0.8 -40 -20 0 20 RDS1 1.1 60 5.0 5.5 80 100 RDS2 RDS5 RDS4 0.9 RDS3 0.8 40 4.5 1.0 0.7 -40 Temperature (C) 4290A.2009.07.1.3 VIN = 5.0V IO1-5 = 100mA 1.2 RDS1 1 4.0 RDS(ON) vs. Temperature 1.4 VIN = 5.0V IO1-5 = 50mA 3.5 Input Voltage (V) Input Voltage (V) RDS(ON) () 5.0 2.1 RDS(ON) ( ) VIH and VIL (V) 1 0.7 4.5 2.3 0.9 1.2 4.0 RDS(ON) vs. Input Voltage 1.2 1.3 3.5 Input Voltage (V) -20 0 20 40 60 80 100 Temperature (C) www.analogictech.com 5 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1F, COUTX = 0.1F, TA = 25C. EN/SET Off Timeout vs. Temperature 3.4 3.4 3.2 3.2 Off Timeout, tO (s) Latch Timeout, tLAT (s) EN/SET Latch Timeout vs. Temperature 3 2.8 VIN = 3.3V 2.6 VIN = 5.0V 2.4 3 VIN = 3.3V 2.8 2.6 VIN = 5.0V 2.4 2.2 2.2 -40 -20 0 20 40 60 80 -40 100 -20 0 20 40 60 80 100 Temperature (C) Temperature (C) EN/SET Timeout vs. Input Voltage Turn-On Characteristic (VIN = 5V, RL1 = RL2 = 50 ; CO1 = CO2 = 0.1F) 4.3 4.1 Timeout ( s) 3.9 VO2 (5V/div) 3.7 3.5 3.3 VO1 (5V/div) Off Timeout tO 3.1 2.9 2.7 EN/SET (5V/div) Latch Timeout tLAT 2.5 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage (V) Time (2s/div) Turn-On Characteristic Turn-On Characteristic (VIN = 5V; RL1 = RL2 = 50 ; CO1 = CO2 = 0.1F) (VIN = 5V; RL1 = RL2 = 50 ; CO1 = CO2 = 0.1F) VO2 (5V/div) VO2 (5V/div) VO1 (5V/div) VO1 (5V/div) EN/SET (5V/div) EN/SET (5V/div) Time (2s/div) 6 Time (2s/div) www.analogictech.com 4290A.2009.07.1.3 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1F, COUTX = 0.1F, TA = 25C. Turn-On Characteristic Turn-Off Characteristic (VIN = 5V; RL1 = RL2 = 50 ; CO1 = CO2 = 0.1F) (VIN = 5V; RL1 = RL2 = 50 ; CO1 = CO2 = 0.1F) VO2 (5V/div) VO2 (5V/div) VO1 (5V/div) VO1 (5V/div) EN/SET (5V/div) EN/SET (5V/div) Time (2s/div) Time (2s/div) Transition of Outputs Turn-On Transient Characteristic (VIN = 5V; RL1 = RL2 = 50 ; CO1 = CO2 = 0.1F) (VIN = 5V; RL1 = RL2 = 50) VO2 (100mV/div, AC coupled) VO2 (5V/div) VO1 (5V/div) VO1 (5V/div) EN/SET (5V/div) EN/SET (5V/div) Time (5 s/div) Time (2s/div) 4290A.2009.07.1.3 www.analogictech.com 7 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Functional Block Diagram OUT1 IN OUT2 OUT3 OUT4* OUT5* UVLO Control Logic and Level Shift ROM S2Cwire Interface EN/SET GND reached this point, the gate is quickly increased to the full input voltage and RDS(ON) is minimized. Functional Description The AAT4290A consists of five P-channel MOSFET power switches designed for I/O expansion applications. The AAT4291A has all of the features offered in the AAT4290A, but integrates three switches instead of five. It operates with input voltages ranging from 1.8V to 5.5V which, along with its extremely low operating current, makes it ideal for battery-powered applications. In cases where the input voltage drops below 1.8V, the AAT4290A MOSFETs are protected from entering the linear region of operation by automatically shutting down. In addition, the TTL-compatible EN/SET pin makes the AAT4290A an ideal level-shifted load switch. An optional slew rate controlling feature eliminates in-rush current when a MOSFET is turned on, allowing the AAT4290A to be implemented with a small input capacitor or no capacitor at all, while maintaining isolation between channels. During slewing, the current ramps linearly until it reaches the level required for the output load condition. The proprietary control method works by careful control and monitoring of the MOSFET gate voltage. When the device is switched ON, the gate voltage is quickly increased to the threshold level of the MOSFET. Once at this level, the current begins to slew as the gate voltage is slowly increased until the MOSFET becomes fully enhanced. Once it has 8 *AAT4290A only The ON/OFF state of the five MOSFET switches are controlled by the EN/SET serial data input. An internal control counter is clocked on the rising edge of the EN/SET pin and is decoded into the 32 possible states of the MOSFET (see Table 1). The counter rolls over after 32 clocks and the table repeats. The counter can be clocked at speeds up to 1MHz, but the count value is not latched until clocking has stopped and the EN/SET pin has remained high for approximately 2.6s. The first rising edge of EN/SET enables the AAT4290A and is counted as the first clock. To change states, additional low going clock pulses may be asserted on the EN/SET pin with the resulting change taking effect after the EN/SET pin has remained in a high state for TLAT. The AAT4290A is disabled after the EN/SET pin has transitioned and remained in a logic low state for TO. With the exception of three channel power switches, the AAT4291A has a similar function to the AAT4290A. The ON/OFF state of the three MOSFET switches are controlled by the EN/SET serial data input. An internal control counter is clocked on the rising edge of the EN/SET pin and is decoded into the eight possible states of the MOSFET (see Table 2). The counter rolls over after eight clocks and the table repeats. www.analogictech.com 4290A.2009.07.1.3 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Timing Diagram OUTn THI TLO TLAT TD(ON) TR TO TD(OFF) EN/SET Clock OUT5 OUT4 OUT3 OUT2 OUT1 Clock OUT3 OUT2 OUT1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 on on on on on on on on on on on on on on on on off off off off off off off off off off off off off off off off on on on on on on on on off off off off off off off off on on on on on on on on off off off off off off off off on on on on off off off off on on on on off off off off on on on on off off off off on on on on off off off off on on off off on on off off on on off off on on off off on on off off on on off off on on off off on on off off on off on off on off on off on off on off on off on off on off on off on off on off on off on off on off on off 1 2 3 4 5 6 7 8 on on on on off off off off on on off off on on off off on off on off on off on off Table 1: AAT4290A Output Settings. 4290A.2009.07.1.3 Table 2: AAT4291A Output Settings. Applications Information Thermal Considerations The AAT4290A is designed to deliver continuous output load currents. Due to its high level of integration, care must be taken in designing for higher load conditions. If greater loads are required, outputs can be tied together to deliver higher power to a given load. At 25C ambient, the AAT4290A is capable of dissipating 440mW of power, or 1.14A at 5.0V, for an average current of 228mA per output. At 85C ambient, the AAT4290A is capable of dissipating 178mW of power, or 0.72A at 5.0V, for an average current of 145mA per output. Output Sequencing If output sequencing is not necessary, then all of the outputs will be switched on simultaneously on the first rising edge of the EN/SET pin. However, if output sequencing is desired, then a series of pulses on the EN/ SET pin will accomplish this. Each time a new group of pulses is asserted on EN/SET, the AAT4290A/91A internal control is reset. For example, to sequence the outputs in order from OUT5 to OUT1, five clocks bursts are input on the EN/SET pin. From Table 1, the first burst of 16 clocks turns on OUT5. A following burst of 8 clocks (as the counter resets) will add OUT4, followed by 4 clocks to add OUT3, 2 clocks to add OUT2, and 1 clock to add OUT1. Likewise, the outputs can be turned off in any order by adding more clock bursts. www.analogictech.com 9 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Applications Circuits VSUPPLY 1.8 to 5.5V AAT4290A IN GPIO 1 EN/SET OUT1 EN 1 OUT2 Function 1 OUT3 System Controller OUT4 EN 2 OUT5 GPIO 2 GPIO 2 to GPIO 5 are now free for other uses GPIO 3 GPIO 4 GPIO 5 EN 3 EN 4 EN 5 Function 2 Function 3 Function 4 Function 5 Figure 1: GPIO I/O Expander (condense five GPIO control lines to one). VBATTERY AAT3110IJS-5.0 SC70JW-8: 2x2mm AAT4291AIJS SC70JW-8: 2x2mm VIN IN VOUT OUT1 OUT2 10F C+ 10F OUT3 RGB LED R 1F ON/OFF SHDN CGND G B EN/SET GND RR CLOCK RG RB Figure 2: RGB LED Control (eliminates three discrete MOSFET switches). 10 www.analogictech.com 4290A.2009.07.1.3 PRODUCT DATASHEET AAT4290A/91A SmartSwitchTM I/O Expander Load Switches with Serial Control Ordering Information Package Marking1 Part Number (Tape and Reel)2 SC70JW-8 SC70JW-8 OQXYY OPXYY AAT4290AIJS-1-T1 AAT4291AIJS-1-T1 Package Information 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. 1. XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. Advanced Analogic Technologies, Inc. 3230 Scott Boulevard, Santa Clara, CA 95054 Phone (408) 737-4600 Fax (408) 737-4611 (c) 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. 4290A.2009.07.1.3 www.analogictech.com 11