AAT4291

AAT4290/91 I/O Expander Load Switches with Serial Control General Description 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 AnalogicTech’s 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. The AAT4290 and AAT4291 are offered in a Pbfree, 8-pin SC70JW package specified over the -40°C to +85°C temperature range. Features • • • • • SmartSwitch™ • • 1.8V to 5.5V Input Voltage Range 5 or 3 Independent Load Switches 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 • • • • • Cell Phones I/O Expansion Multiple Low Power Switching Personal Communication Devices Portable Electronic Devices Typical Application INPUT IN OUT1 OUT2 OUT1 OUT2 OUT3 OUT4 OUT5 AAT4290 EN/SET EN/SET OUT3 OUT4 OUT5 GND CIN 1µF COUT1 0.1µF COUT2 0.1µF COUT3 0.1µF COUT4 0.1µF COUT5 0.1µF GND GND 4290.2006.03.1.2 1 AAT4290/91 I/O Expander Load Switches with Serial Control Pin Descriptions Pin # AAT4290 AAT4291 Symbol IN OUT2 OUT1 EN/SET Function Input power supply is connected to the P-channel MOSFET sources. Connect a 1µF 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 AAT4291) 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. 1 2 3 4 1 7 6 4 5 6 7 8 N/A 5 N/A N/A 8 2, 3 GND OUT5 OUT4 OUT3 N/C Pin Configuration AAT4290 SC70JW-8 (Top View) IN OUT2 OUT1 EN/SET 1 2 3 4 8 7 6 5 AAT4291 SC70JW-8 (Top View) OUT3 OUT4 OUT5 GND IN N/C N/C EN/SET 1 2 3 4 8 7 6 5 OUT3 OUT2 OUT1 GND 2 4290.2006.03.1.2 AAT4290/91 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 -0.3 to 6.0 -0.3 to VIN + 0.3 -0.3 to 6.0 250 -65 to 150 4000 Units V V V mA °C V Thermal Characteristics Symbol θJA PD Description Thermal Resistance Maximum Power Dissipation (TA = 25°C)4 3 Value 225 440 Units °C/W mW 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 1.5kΩ resistor to each pin. 3. Mounted on the board. 4. Derate 4.4mW/°C above 25°C. 4290.2006.03.1.2 3 AAT4290/91 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 TA = 25°C. Symbol VIN IQ IQ(OFF) ISD(OFF) VUVLO VUVLO(hys) RDS(ON) Description Operation Voltage Quiescent Current Off Supply Current Off Switch Current Under-Voltage Lockout Under-Voltage Lockout Hysteresis Conditions 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 = = = = 25°C 25°C 25°C 25°C Min 1.8 Typ Max 5.5 4.5 8 1 1 Units V µA µA µA V mV Ω On Resistance 0.1 1.2 250 2.5 1.5 1.2 1.1 2800 3.8 2.2 1.8 1.7 On Resistance Temperature Coefficient AAT4290-1 and AAT4291-1 TD(ON) Output Turn-On Delay Time 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 TCRDS THI TO TLAT ISINK Minimum EN/SET High Time EN/SET Off Timeout EN/SET Latch Timeout EN/SET Input Leakage ppm°C VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF VIN = 5V, RLOAD = 500Ω, COUT = 0.1µF VIN = 5V, RLOAD = 500Ω VIN = 1.8V VIN = 5.5V VEN/SET < 0.4V VIN ≤ 2.5V VIN > 2.5V 40 270 40 0.4 1.6 100 500 250 4.0 4.0 1 ns ns ns V V ns ns µs µs µA VEN/SET = 5.5V 2.6 2.6 0.01 1. The AAT4290/91 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 4290.2006.03.1.2 AAT4290/91 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 6 5.5 5 4.5 5.5 5 Quiescent Current vs. Input Voltage VIN = 5.0V IQ (µA) VIN = 3.3V -40 -20 0 20 40 60 80 100 4.5 4 3.5 3 2.5 2 1.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 IQ (µA) 4 3.5 3 2.5 2 Temperature (°C) Input Voltage (V) VIH and VIL vs. Input Voltage 1.4 1.3 1.2 2.7 2.5 RDS(ON) vs. Input Voltage IO1-5 = 100mA VIH RDS(ON) (Ω) 2.3 2.1 VIH and VIL (V) 1.1 1 0.9 0.8 0.7 1.9 1.7 1.5 1.3 1.1 0.9 RDS5 RDS1 RDS2 RDS3 VIL RDS4 3.0 3.5 4.0 4.5 5.0 5.5 0.6 0.5 0.7 1.5 1.5 2 2.5 3 3.5 4 4.5 5 5.5 2.0 2.5 Input Voltage (V) Input Voltage (V) RDS(ON) vs. Temperature 1.3 1.2 1.1 RDS(ON) vs. Temperature 1.4 1.3 VIN = 5.0V IO1-5 = 50mA RDS2 RDS(ON) (Ω) RDS1 RDS5 RDS4 VIN = 5.0V IO1-5 = 100mA RDS2 RDS1 RDS5 1.2 1.1 1.0 0.9 0.8 40 60 80 100 0.7 -40 RDS(ON) (Ω) 1 0.9 0.8 0.7 -40 RDS4 RDS3 -20 0 20 40 60 80 100 RDS3 -20 0 20 Temperature (°C) 4290.2006.03.1.2 Temperature (°C) 5 AAT4290/91 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 Latch Timeout vs. Temperature 3.4 3.4 3.2 3 2.8 2.6 2.4 2.2 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 EN/SET Off Timeout vs. Temperature Latch Timeout, tLAT (µs) 3 2.8 Off Timeout, tO (µs) 3.2 VIN = 3.3V VIN = 3.3V 2.6 VIN = 5.0V 2.4 2.2 -40 VIN = 5.0V Temperature (°C) Temperature (°C) EN/SET Timeout vs. Input Voltage 4.3 4.1 3.9 (VIN = 5V, RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) Turn-On Characteristic Timeout (µs) 3.7 3.5 3.3 3.1 2.9 2.7 2.5 1.5 2 2.5 3 3.5 4 4.5 5 5.5 VO2 (5V/div) VO1 (5V/div) EN/SET (5V/div) Input Voltage (V) Time (2µs/div) Off Timeout tO Latch Timeout tLAT (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) Turn-On Characteristic (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) Turn-On Characteristic VO2 (5V/div) VO1 (5V/div) EN/SET (5V/div) Time (2µs/div) VO2 (5V/div) VO1 (5V/div) EN/SET (5V/div) Time (2µs/div) 6 4290.2006.03.1.2 AAT4290/91 I/O Expander Load Switches with Serial Control Typical Characteristics Unless otherwise noted, VIN = 5V, CIN = 1µF, COUTX = 0.1µF, TA = 25°C. (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) Turn-On Characteristic (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) Turn-Off Characteristic VO2 (5V/div) VO1 (5V/div) EN/SET (5V/div) Time (2µs/div) VO2 (5V/div) VO1 (5V/div) EN/SET (5V/div) Time (2µs/div) (VIN = 5V; RL1 = RL2 = 50Ω; CO1 = CO2 = 0.1µF) Transition of Outputs Turn-On Transient Characteristic (VIN = 5V; RL1 = RL2 = 50Ω) VO2 (5V/div) VO1 (5V/div) EN/SET (5V/div) Time (2µs/div) VO2 (100mV/div, AC coupled) VO1 (5V/div) EN/SET (5V/div) Time (5µs/div) 4290.2006.03.1.2 7 AAT4290/91 I/O Expander Load Switches with Serial Control Functional Block Diagram IN OUT1 OUT2 OUT3 OUT4* OUT5* UVLO Control Logic and Level Shift ROM EN/SET S2Cwire Interface GND *AAT4290 only 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 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 4290.2006.03.1.2 AAT4290/91 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. 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. 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 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 Clock 1 2 3 4 5 6 7 8 OUT3 on on on on off off off off OUT2 on on off off on on off off OUT1 on off on off on off on off Table 2: AAT4291 Output Settings. 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. Table 1: AAT4290 Output Settings. 4290.2006.03.1.2 9 AAT4290/91 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 AAT4290/91 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. 10 4290.2006.03.1.2 AAT4290/91 I/O Expander Load Switches with Serial Control Applications Circuits VSUPPLY 1.8 to 5.5V AAT4290 IN OUT1 OUT2 OUT3 OUT4 OUT5 GPIO 1 EN/SET EN 1 Function 1 System µController GPIO 2 GPIO 3 GPIO 4 GPIO 5 EN 2 Function 2 GPIO 2 to GPIO 5 are now free for other uses EN 3 Function 3 EN 4 Function 4 EN 5 Function 5 Figure 1: GPIO I/O Expander (condense five GPIO control lines to one). AAT3110IJS-5.0 SC70JW-8: 2x2mm VIN VOUT AAT4291IJS SC70JW-8: 2x2mm IN OUT1 10µF OUT2 OUT3 RGB LED 1µF R EN/SET GND RR RG RB G B VBATTERY 10µF C+ ON/OFF SHDN GND C- CLOCK Figure 2: RGB LED Control (eliminates three discrete MOSFET switches). 4290.2006.03.1.2 11 AAT4290/91 I/O Expander Load Switches with Serial Control Ordering Information Package SC70JW-8 SC70JW-8 Marking1 HSXYY HCXYY Part Number (Tape and Reel)2 AAT4290IJS-1-T1 AAT4291IJS-1-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/pbfree. Package Information SC70JW-8 0.50 BSC 0.50 BSC 0.50 BSC 1.75 ± 0.10 0.225 ± 0.075 2.00 ± 0.20 2.20 ± 0.20 0.048REF 0.15 ± 0.05 0.85 ± 0.15 1.10 MAX 0.100 7 ° ± 3° 0.45 ± 0.10 2.10 ± 0.30 4° ± 4° 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. 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. Customers are advised 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 4290.2006.03.1.2 0.05 ± 0.05