AAT4290/4291 I/O Expander Load Switches with Serial Control General Description Features The AAT4290 and AAT4291 SmartSwitch™ products are members of AnalogicTech’s Application Specific Power MOSFET™ (ASPM™) product family. The AAT4290 and AAT4291 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 Control™ (S2Cwire™) interface which permits ease of control and efficiency of size. The quiescent supply current is very low, typically 5µA. In shutdown mode, the supply current is reduced to less than 1µA. • • • • • • • • SmartSwitch™ 1.8V to 5.5V Input Voltage Range 5 or 3 Independent Load Switches Optional 200µS Slew Rate Control S2Cwire Interface 1.1Ω RDS(ON) Per Switch Low Quiescent Current — 5µA — 0.1µA in Shutdown -40°C to +85°C Temperature Range 8-Pin SC70JW Package Applications • • • • • The AAT4290 and AAT4291 are offered in an 8 pin SC70JW package specified over the -40°C to +85°C temperature range. Cell Phones I/O Expansion Multiple Low Power Switching Personal Communication Devices Portable Electronic Devices Typical Application INPUT IN AAT4290 EN/SET EN/SET OUT1 OUT1 OUT2 OUT2 OUT3 OUT3 OUT4 OUT4 OUT5 OUT5 GND CIN 1µF GND 4290.2005.01.1.0 COUT1 0.1µF COUT2 0.1µF COUT3 0.1µF COUT4 0.1µF COUT5 0.1µF GND 1 AAT4290/4291 I/O Expander Load Switches with Serial Control Pin Descriptions Pin # AAT4290 AAT4291 Symbol Function 1 1 IN 2 7 OUT2 P-channel MOSFET drain. 3 6 OUT1 P-channel MOSFET drain. 4 4 EN/SET 5 5 GND Ground connection. 6 N/A OUT5 P-channel MOSFET drain. 7 N/A OUT4 P-channel MOSFET drain. 8 8 OUT3 P-channel MOSFET drain. Input power supply is connected to the P-channel MOSFETs sources. Connect a 1µF capacitor from IN to GND. Input control pin using S2Cwire serial interface. The device records rising edges of the clock and decodes them into 32 states (8 states for AAT4291) which controls the ON/OFF states of the MOSFETs. See Table 1 and Table 2 for output settings. Pin Configuration AAT4290 (SC70JW-8) IN OUT2 OUT1 EN/SET 2 1 8 2 7 3 6 4 5 AAT4291 (SC70JW-8) OUT3 OUT4 OUT5 GND IN N/C N/C EN/SET 1 8 2 7 3 6 4 5 OUT3 OUT2 OUT1 GND 4290.2005.01.1.0 AAT4290/4291 I/O Expander Load Switches with Serial Control Absolute Maximum Ratings1 Symbol Description VIN VOUT VEN/SET IMAX TSTORAGE VESD IN to GND OUT to GND EN/SET to GND Maximum Continuous Switch Current Storage Temperature Range ESD Rating - HBM 2 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 Notes: 1: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional conditions 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 1.5kΩ resistor to each pin. Thermal Characteristics Symbol θJA PD Description 3 Thermal Resistance Maximum Power Dissipation (TA = 25°C) 4 Value Units 225 440 °C/W mW Note 3: Mounted on the board. Note 4: Derate 4.4mW/°C above 25°C. 4290.2005.01.1.0 3 AAT4290/4291 I/O Expander Load Switches with Serial Control Electrical Characteristics VIN = 5.0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C. Symbol VIN IQ IQ(OFF) ISD(OFF) VUVLO VUVLO(hys) RDS(ON) TCRDS Description Operation Voltage Quiescent Current Off Supply Current Off Switch Current Under-Voltage Lockout Under-Voltage Lockout Hysteresis On-Resistance Conditions Min Typ Max 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 VIN VIN VIN VIN = = = = 1.8V, TA 3.0V, TA 4.2V, TA 5.0V, TA = = = = 4.5 0.1 1.2 250 2.5 1.5 1.2 1.1 2800 25°C 25°C 25°C 25°C On-Resistance Temperature Coefficient Units 5.5 8 V µA 1 1 µA µA V mV 3.8 2.2 1.8 1.7 Ω ppm°C AAT4290-1 and AAT4291-1 TD(ON) TR TD(OFF) Output Turn-On Delay Turn-On Rise Time Turn-Off Delay Time VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF VIN = 5V, RLOAD = 500Ω 40 270 40 ns ns ns Output Turn-On Delay Turn-On Rise Time Turn-Off Delay Time VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF VIN = 5V, RLOAD = 500Ω 50 200 40 µs µs ns Enable Threshold Low Enable Threshold High EN/SET Low Time VIN = 1.8V VIN = 5.5V VEN/SET < 0.4V VIN ≤ 2.5V VIN > 2.5V AAT4290-2 and AAT4291-2 TD(ON) TR TD(OFF) EN/SET VEN(L) VEN(H) TLO THI TO TLAT ISINK Minimum EN/SET High Time EN/SET Off Timeout EN/SET Latch Timeout EN/SET Input Leakage VEN/SET = 5.5V 0.4 1.6 100 2.6 2.6 0.01 500 250 4.0 4.0 1 V V ns ns µs µs µA Note 1: The AAT4290 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls. 4 4290.2005.01.1.0 AAT4290/4291 I/O Expander Load Switches with Serial Control Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1µF, COUTX = 0.1µF, TA = 25°C. Quiescent Current vs. Temperature Quiescent Current vs. Input Voltage 6 5.5 5.5 5 VIN=5.0V 5 4.5 4 IQ (µA) IQ (µA) 4.5 4 3.5 3.5 3 VIN=3.3V 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 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) Temperature (°C) VIH and VIL vs. Input Voltage RDS(ON) vs. Input Voltage 2.7 1.4 IO1-5 = 100mA 2.5 1.3 VIH 1.2 2.3 RDS(ON) (Ω) VIH and VIL (V) 2.1 1.1 1 0.9 VIL 0.8 RDS5 1.9 RDS1 1.7 RDS2 1.5 1.3 1.1 RDS3 0.7 0.9 0.6 1.5 0.5 1.5 2 2.5 3 3.5 4 4.5 5 2.0 2.5 5.5 RDS(ON) vs. Temperature 1.3 RDS2 RDS1 RDS5 0.9 RDS4 RDS3 0.8 5.0 5.5 0 20 RDS2 RDS1 1.1 RDS5 1.0 RDS4 0.9 RDS3 0.8 0.7 40 Temperature (°C) 4290.2005.01.1.0 4.5 VIN = 5.0V IO1-5 = 100mA 1.2 RDS(ON) (Ω) RDS(ON) (Ω) 1.1 -20 4.0 1.4 VIN = 5.0V IO1-5 = 50mA -40 3.5 RDS(ON) vs. Temperature 1.3 1 3.0 Input Voltage (V) Input Voltage (V) 1.2 RDS4 0.7 60 80 100 0.7 -40 -20 0 20 40 60 80 100 Temperature (°C) 5 AAT4290/4291 I/O Expander Load Switches with Serial Control Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1µF, COUTX = 0.1µF, TA = 25°C. EN/SET Off Timeout vs. Temperature 3.4 3.4 3.2 3.2 Off Timeout, tO (µs) Latch timeout, tLAT (µs) EN/SET Latch Timeout vs. Temperature 3 2.8 VIN = 3.3V 2.6 VIN = 5.0V 3 2.6 2.4 2.4 2.2 2.2 -40 -20 0 20 40 60 80 100 VIN = 3.3V 2.8 VIN = 5.0V -40 -20 0 20 40 60 80 100 Temperature (°C) Temperature (°C) Turn-On Characteristic EN/SET Timeout vs. Input Voltage (VIN = 5V, RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) 4.3 4.1 Timeout (µs) 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) Turn-On Characteristic Turn-On Characteristic (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) VO2 (5V/div) VO2 (5V/div) VO1 (5V/div) VO1 (5V/div) EN/SET (5V/div) EN/SET (5V/div) Time (2µs/div) 6 Time (2µs/div) Time (2µs/div) 4290.2005.01.1.0 AAT4290/4291 I/O Expander Load Switches with Serial Control Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1µF, COUTX = 0.1µF, TA = 25°C. Turn-On Characteristic Turn-Off Characteristic (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) VO2 (5V/div) VO2 (5V/div) VO1 (5V/div) VO1 (5V/div) EN/SET (5V/div) EN/SET (5V/div) Time (2µs/div) Time (2µs/div) Transition of Outputs Turn-On Transient Characteristic (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) (VIN = 5V; RL1 = RL2 = 50Ω) VO2 (100mV/div, AC coupled) VO2 (5V/div) VO1 (5V/div) VO1 (5V/div) EN/SET (5V/div) EN/SET (5V/div) Time (2µs/div) 4290.2005.01.1.0 Time (5µs/div) 7 AAT4290/4291 I/O Expander Load Switches with Serial Control Functional Block Diagram OUT1 IN OUT2 OUT3 OUT4* OUT5* UVLO Control Logic and Level Shift ROM EN/SET S2Cwire Interface GND Functional Description The AAT4290 consists of five P-channel MOSFET power switches designed for I/O expansion applications. The AAT4291 has all of the features offered in the AAT4290, 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 AAT4290 MOSFETs are protected from entering the linear region of operation by automatically shutting down. In addition, the TTL-compatible EN/SET pin makes the AAT4290 an ideal level-shifted load switch. An optional slew rate controlling feature eliminates inrush current when a MOSFET is turned on, allowing the AAT4290 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 8 *AAT4290 only 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 reached this point, the gate is quickly increased to the full input voltage and RDS(ON) is minimized. 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 2.6µs. The first rising edge of EN/SET enables the AAT4290 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 4290.2005.01.1.0 AAT4290/4291 I/O Expander Load Switches with Serial Control effect after the EN/SET pin has remained in a high state for TLAT. The AAT4290 is disabled after the EN/SET pin has transitioned and remained in a logic low state for TO. Table 1: AAT4290 Output Settings. Clock OUT5 OUT4 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 4290.2005.01.1.0 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 OUT3 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 OUT2 OUT1 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 With the exception of three channel power switches, the AAT4291 has a similar function to the AAT4290. 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. Table 2: AAT4291 Output Settings. Clock OUT3 OUT2 OUT1 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 Applications Information Thermal Considerations The AAT4290 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 25°C ambient, the AAT4290 is capable of dissipating 440mW of power, or 1.14A at 5.0V, for an average current of 228mA per output. At 85°C ambient, the AAT4290 is capable of dissipating 178mW of power, or 0.72A at 5.0V, for an average current of 145mA per output. 9 AAT4290/4291 I/O Expander Load Switches with Serial Control Timing Diagram OUTn THI TLO TLAT TD(ON) TR TO TD(OFF) EN/SET 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 AAT4290/1 internal control is reset. For example, to 10 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. 4290.2005.01.1.0 AAT4290/4291 I/O Expander Load Switches with Serial Control Applications Circuits VSUPPLY 1.8 to 5.5V AAT4290 IN GPIO 1 EN/SET OUT1 EN 1 OUT2 Function 1 OUT3 System µController 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 SC70JW8: 2x2mm AAT4291IJS SC70JW8: 2x2mm VIN IN VOUT OUT1 OUT2 10µF C+ 10µF OUT3 R/G/B LED R 1µF ON/OFF SHDN CGND G B EN/SET GND RR CLOCK RG RB Figure 2: RGB LED Control (eliminates three discrete MOSFET switches). 4290.2005.01.1.0 11 AAT4290/4291 I/O Expander Load Switches with Serial Control Ordering Information Package Marking1 Part Number (Tape and Reel) SC70JW-8 HSXYY AAT4290IJS-1-T1 SC70JW-8 HCXYY AAT4291IJS-1-T1 Note: Sample stock is generally held on part numbers listed in BOLD. Note 1: XYY = assembly and date code. 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 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, 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 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 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. Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 12 4290.2005.01.1.0