 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset General Description The AAT3526/7/8 PowerManager products are members of AnalogicTech's Total Power Management ICTM (TPMICTM) product family. These microprocessor reset circuits are ideal for monitoring voltage supplies in portable systems, where extended battery life is critical. They provide a reliable, lowcost solution by eliminating external components. The AAT3526/7/8 products operate by monitoring the system power supply voltage. When the input voltage drops below a fixed threshold, the device asserts a reset signal for a minimum of 150ms after VCC has risen back above the fixed threshold. They are guaranteed to operate down to 1.2V and designed to ignore fast line transients appearing on VCC. The AAT3526/7/8 series is available with three output stage versions: AAT3526 push-pull active low output; AAT3527 push-pull active high output; and AAT3528 open drain active low output. The quiescent supply current is extremely low, typically 1A, making this device ideal for portable batteryoperated equipment. AAT3526/7/8 devices are available in a Pb-free, 4-pin SOT143 package and are specified over the -40C to +85C operating temperature range. Features * * * * * * * * * PowerManagerTM * * * Input Voltage Range: 1.2V to 5.5V Operation Down to 1.2V Extremely Low Quiescent Current: Less Than 2A High Accuracy Detection Threshold: 1.5% Monitor Power Supply Voltages Fixed Thresholds From 2.2V to 4.6V Minimum 150ms Reset Pulse Width With Fast Delay Time <20s Debounced Manual Reset Input Available Output Configurations: -- Open-Drain Output -- CMOS Active High Output -- CMOS Active Low Output Temperature Range: -40C to +85C 4-Pin SOT143 Package 4kV ESD Rating Applications * * * * * Cell Phones Embedded Systems Intelligent Instruments Notebook Computers Portable Electronics Typical Application VCC VCC * 100k (nominal) VCC MR AAT3526 AAT3527 RESET (RESET) AAT3528 RESET P INPUT GND GND *AAT3528 Only 3526.2006.03.1.6 1 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Pin Descriptions AAT3526, 3527, 3528 (SOT143) Pin # 1 Symbol GND RESET (AAT3527) Function Ground connection. RESET output remains high while VCC is below the reset threshold and remains so for a minimum of 150ms after VCC raises above the reset threshold. RESET output remains low while VCC is below the reset threshold and remains so for a minimum of 150ms after VCC raises above the reset threshold. Manual reset active low input. A logic low signal on MR asserts a reset condition. Asserted reset continues as long as MR is low and for a minimum of 150ms after MR returns high. Supply voltage (+1.2V to +5.5V). Due to extremely low operating current, it is recommended to place a 10nF capacitor between VCC and GND. 2 RESET (AAT3526, AAT3528) 3 MR 4 VCC Part Number Descriptions Part Number AAT3526 AAT3527 AAT3528 Output Type Reset Output Push Pull Active Low with Delay Reset Output Push Pull Active High with Delay Reset Output Open Drain Active Low with Delay Pin Configuration SOT143 (Top View) GND 1 4 VCC (RESET) RESET 2 3 MR 2 3526.2006.03.1.6 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Absolute Maximum Ratings1 TA = 25C, unless otherwise noted. Symbol VCC VMR VRESET IVCC, IMR IRESET dVcc/dt TJ TLEAD Description VCC to GND MR to GND RESET to GND (Push-Pull Output) RESET to GND (Open Drain Output) Maximum Continuous Input Current RESET/RESET Current Rate of Rise of VCC Operating Junction Temperature Range Maximum Soldering Temperature (at Leads) for 10s Value -0.3 to 5.5 -0.3 to VCC + 0.3 -0.3 to VCC + 0.3 -0.3 to 5.5 20 20 100 -40 to 150 300 Units V V V mA mA V/s C C Thermal Information2 Symbol JA PD Description Maximum Thermal Resistance Maximum Power Dissipation Value 200 320 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. Mounted on an FR4 board. 3526.2006.03.1.6 3 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Electrical Characteristics VIN = 5V, TA = -40C to +85C, unless otherwise noted. Typical values are TA = 25C, VCC = 5V for 4.63/4.38V versions, VCC = 3.3V for 3.08/2.93V versions, VCC = 3.0V for 2.63V versions, and VCC = 2.5V for 2.32/2.2V versions. Symbol VCC IQ VTH VTH/C tP tRDY tMR MRGI tMD VIH VIL RMR VOL Description Operation Voltage Quiescent Current RESET Threshold1 Conditions TA = 0C to +70C TA = -40C to +85C VCC = 5.5V VCC = 3V TA = 25C TA = -40C to +85C Min 1.0 1.2 Typ Max Units VOH VOL VOH IDOFF RESET Threshold Tempco RESET Propagation Delay VCC = VTH to (VTH - 100mV) RESET Active Timeout Period MR Minimum Pulse Width MR Glitch Immunity MR to Reset Propagation Delay VCC = VTH(MAX), VTH 4.38V MR Input Threshold (High) VCC = VTH(MAX), VTH < 4.38V VCC = VTH(MAX), VTH 4.38V MR Input Threshold (Low) VCC = VTH(MAX), VTH < 4.38V MR Pull-Up Resistance ISINK = 1.2mA, VCC = VTH(min), RESET Low Output Voltage VTH 3.08V, RESET Asserted AAT3526, AAT3528 ISINK = 3.2mA, VCC = VTH(min), VTH > 3.08V, RESET Asserted ISOURCE = 800A, VTH > 3.08V, RESET High Output Voltage VCC > VTH (max) AAT3526 ISOURCE = 500A, VTH 3.08V, VCC > VTH (max) ISINK = 1.2mA, VCC > VTH (max) RESET Low Output Voltage VTH 3.08V, RESET Not Asserted AAT3527 ISINK = 3.2mA, VCC > VTH (max) VTH > 3.08V, RESET Not Asserted ISOURCE = 500A, VCC > 2.1V, RESET High Output Voltage RESET Asserted AAT3527 ISOURCE = 50A, VCC > 1.2V, RESET Asserted RESET Leakage Current, VCC > VTH AAT3528 5.5 V 5.5 1.05 3 A 0.85 2 VTH - 1.5% VTH VTH + 1.5% V VTH - 2.5% VTH VTH + 2.5% 40 ppm/C 15 s 150 250 400 ms 10 s 100 ns 0.5 s 2.3 V 0.7 x VCC 0.8 V 0.25 x VCC 30 65 90 k 0.3 V 0.4 VCC - 1.5 V 0.8 VCC 0.3 V 0.4 0.8VCC V 0.8VCC 1 A 1. See Ordering Information for factory-trimmed reset thresholds. 4 3526.2006.03.1.6 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Typical Characteristics Supply Current vs. Temperature 1.40 Normalized Reset Threshold vs. Temperature Normalized Threshold 1.003 1.002 1.001 1.000 0.999 0.998 0.997 -40 -20 0 20 40 60 80 Supply Current (A) 1.20 1.00 0.80 0.60 0.40 0.20 0.00 -40 -20 VCC = 5V VCC = 3V 0 20 40 60 80 Temperature (C) Temperature (C) Power-Up Reset Timeout vs. Temperature 320 300 Power-Down Reset Propagation Delay vs. Temperature Reset Propagation Delay (s) 30 25 20 15 10 5 0 -40 Power-Up Reset Timeout (ms) VOD = 10mV 280 260 240 220 200 180 160 -40 -20 0 20 40 60 80 100 VOD = 100mV -20 0 20 40 60 80 Temperature (C) Temperature (C) Maximum Transient Duration vs. Reset Threshold Overdrive 400 Maximum Transient Duration (s) 350 300 250 200 150 100 50 0 1 10 100 1000 Reset Threshold Overdrive, VTH - VCC (mV) 3526.2006.03.1.6 5 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Functional Block Diagram MR VCC Reset Generator + Timer RESET (RESET) Oscillator VREF GND Functional Description General During start-up, the reset pin on a microprocessor ensures that it is fully reset and starts up in a known condition. The AAT3526/7/8 series of microprocessor reset devices monitor the supply voltage to a microprocessor and assert a reset signal whenever the VCC voltage falls below a factory-programmed threshold. This threshold is accurate within 1.5% at 25C and within 2.5% over the entire operating temperature range. The reset signal remains asserted for a minimum of 150ms after VCC has risen above the threshold, as shown in Figure 1. VTH VCC VTH VTH tRDY tRDY Figure 1: Reset Timing Diagram. 6 3526.2006.03.1.6 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Applications Information Reset Output Options The AAT3528 has an active low open drain output and the AAT3526/7 have a push-pull output. The AAT3528 may be used in multiple voltage systems with an external pull-up resistor. This allows the AAT3528 to interface to microprocessors with higher supply voltages up to 5.5V (Figure 2). In the event of a power-down or brown-out condition, the reset signal remains valid until the VCC drops below 1.2V. To ensure validity down to ground, an external 100k resistor should be connected between the RESET output and GND. MR input is internally debounced which allows the use of a mechanical switch. It should be a normallyopen momentary switch connected from MR to GND. Additionally, the MR pin can be driven from TTL, CMOS, or open drain logic outputs. Supply Voltage Transient Behavior In some cases, fast negative transients of short duration can appear on the VCC power supply. The AAT3526/7/8 series devices provide some immunity to line transients which can generate invalid reset pulses. Figure 1 shows typical behavior to short duration pulses versus RESET comparator overdrive. As shown in the Maximum Transient Duration vs. Reset Threshold Overdrive graph, when the transient voltage becomes larger, the time allowed before asserting a reset becomes shorter (e.g., typically a transient of 100mV below the reset threshold would have to present for more than 50s to cause a reset). Immunity can be increased by the addition of a small bypass capacitor of 0.1F connected as close to the VCC pin as possible. Manual Reset Input A logic low signal on MR asserts a reset condition. Reset continues to be asserted as long as MR is low and for a minimum of 150ms after MR returns high. This input is internally pulled up to VCC via a 65k resistor, so leaving the pin unconnected is acceptable if the manual reset function is not needed. The VCC VCC * 100k (nominal) VCC 0.1F MR AAT3526 AAT3527 RESET (RESET) AAT3528 RESET P INPUT GND GND *AAT3528 Only Figure 2: Using Recommended Bypass Capacitor. +3.3V +5.0V VCC 100k VCC AAT3528 MR RESET RESET INPUT 5V System GND GND Figure 3: Using AAT3528 Open Drain Output with Multiple Supplies. 3526.2006.03.1.6 7 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Ordering Information and Factory-Trimmed Reset Thresholds1 Ordering Part Number2 AAT3526ICX-2.32-200-T1 AAT3527ICX-2.32-200-T1 AAT3528ICX-2.32-200-T1 AAT3526ICX-2.63-200-T1 AAT3527ICX-2.63-200-T1 AAT3528ICX-2.63-200-T1 AAT3526ICX-2.93-200-T1 AAT3527ICX-2.93-200-T1 AAT3528ICX-2.93-200-T1 AAT3528ICX-3.00-200-T1 AAT3526ICX-3.08-200-T1 AAT3527ICX-3.08-200-T1 AAT3528ICX-3.08-200-T1 AAT3526ICX-4.38-200-T1 AAT3527ICX-4.38-200-T1 AAT3528ICX-4.38-200-T1 AAT3526ICX-4.63-200-T1 AAT3527ICX-4.63-200-T1 AAT3528ICX-4.63-200-T1 Marking3 NOXYY Reset Threshold Voltage, VTH (V) TA = -40C to +85C TA = 25C Min Typ Max Min Max 2.285 2.320 2.355 2.262 2.378 DNXYY 2.591 DRXYY DOXYY DQXYY FQXYY FIXYY EQXYY FHXYY FJXYY GCXYY HLXYY DPXYY HMXYY 2.886 2.955 3.034 2.930 3.000 3.080 2.974 3.045 3.126 2.857 2.925 3.003 3.003 3.075 3.157 2.630 2.669 2.564 2.696 4.314 4.380 4.446 4.271 4.490 4.561 4.630 4.699 4.514 4.746 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. 1. Contact local Sales Office for custom trimmed options. 2. Sample stock is generally held on all part numbers listed in BOLD. 3. XYY = assembly and date code. 8 3526.2006.03.1.6 AAT3526/7/8 MicroPowerTM Supervisory Circuit with Manual Reset Package Information SOT143 2.92 0.12 1.92 BSC 2.37 0.27 0.20 BSC 0.40 0.1 x 3 0.925 0.175 1.01 0.21 1.30 0.10 4 4 0.075 0.075 0.825 0.065 0.69 REF 0.50 0.10 All dimensions in millimeters. (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. 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 3526.2006.03.1.6 0.15 0.07 9 |
Price & Availability of AAT3528ICX-463-200-T1
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |