RT9824CGJ8

® RT9824C Smart Multi-Voltage Detector General Description Features The RT9824C is an integrated smart multi-voltage detector supervising three power supply voltage levels including 5V, 5.4V and additional 3.3V, 12V or other voltage which can be determined by external divided resisters.  Capable of Monitoring Three Inputs Precisely  Detection Threshold Voltages  VCC Connect to 5V or 3.3V Standby Power  V5 : 5V x 80%  V54 : 5.4V x 80%  VADJ : 1V (Using Resistor Divider) Accuracy : ±2% RESET (Open Drain Output Active Low) Built-in Recovery Delay 60ms CTR (Open Drain Output Active Low) Manual Reset (MR) Function TSOT-23-8 Package RoHS Compliant and Halogen Free The RT9824C performs supervisory function by sending out RESET and CTR signals whenever the monitored voltages fall below 80% of voltage levels. The RESET and CTR signals will last the whole period before VCC recovering. Once the supervising voltages are recovered to higher than 80% of the voltage levels, the RESET and CTR signal will be released after 60ms delay time.       MR (Manual Reset) controls CTR signal during three monitored power supply voltages at normal voltage levels. When MR signal is in logic high, the CTR signal will be pulled low immediately. However the RESET will not be interfered and will be kept at high level.  Applications   The RT9824C is available in the TSOT-23-8 package. Ordering Information RT9824C Pin Configurations V54 V5 VADJ 8 7 6 5 2 3 4 RESET GND MR Lead Plating System G : Green (Halogen Free and Pb Free) VCC (TOP VIEW) Package Type J8 : TSOT-23-8 Note :  LCD TV or Monitors Consumer Electronic Products System Voltage Detector Richtek products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. CTR  TSOT-23-8 Marking Information 0K= : Product Code 0K=DNN DNN : Date Code Copyright © 2014 Richtek Technology Corporation. All rights reserved. DS9824C-00 August 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9824C Typical Application Circuit VDD RT9824C 100k Pull Up 8 VCC 3.3V or 5V R1 12V 5 VADJ CTR 1 CTR R2 Manual Reset VDD 4 MR 6 5V 5.4V µP V5 7 V54 RESET 100k Pull Up 2 µP RESET GND 3 Functional Pin Description Pin No. Pin Name Pin Function Control Output (Open Drain, Active-Low). Only when VCC is > POR, V5 is > 80%, V54 is > 80%, and VADJ is > 1V, the CTR will delay 60ms and become high. Once V5 or V54 or VADJ is POR, V5 is > 80%, V54 is > 80%, and VADJ is > 1V, the RESET will delay 60ms and become high. Once V5 or V54 or VADJ is < 80%, the signal will become low. 3 GND Ground. 4 MR 5 VADJ 6 V5 5V Voltage Detection Input. The detection threshold is 5V x 80%. 7 V54 54V Voltage Detection Input. The detection threshold is 5.4V x 80%. 8 VCC Connect this Pin to Standby Power from system. Manual Reset Input. Manual reset with internal pull high resister (1M), H : CTR = Low; L : CTR signal is dependent on voltage detector output. Voltage Detection Input. Connect 12V or other power with external resister divider to this pin. The VADJ logic-high threshold voltage is 1V. Function Block Diagram VCC VREF Voltage Regulator RESET POR VADJ Voltage Detector (VTH = 1V) V5 Voltage Detector (VTH = 5V x 80%) V54 Voltage Detector (VTH = 5.4V x 80%) CTR Delay 60ms GND MR Copyright © 2014 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9824C-00 August 2014 RT9824C Operation The RT9824 smart voltage detector monitors three voltage levels at the same time to ensure the micro-processor is operated within the recommended input voltage range. In conventional reset IC application, to monitor one power rail needs one reset IC. The RT9824 can monitor three power rails simultaneously, by using just one reset IC. The RT9824 also provides a Manual Reset (MR) function for application easily. Glitch-rejection is implemented in the RT9824 to prevent it from false operation and to eliminate the additional de-bouncing circuitry. POR Protection To protect the chip from operating at insufficient supply voltage, the POR is needed. When the input voltage of VIN is lower than the POR falling threshold voltage, the device will be lockout. Copyright © 2014 Richtek Technology Corporation. All rights reserved. DS9824C-00 August 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9824C Absolute Maximum Ratings        (Note 1) VCC, CTR, MR, RESET, V5, V54, VADJ ------------------------------------------------------------------------------ −0.3V to 6.5V Power Dissipation, PD @ TA = 25°C TSOT-23-8 --------------------------------------------------------------------------------------------------------------------- 0.435W Package Thermal Resistance (Note 2) TSOT-23-8, θJA --------------------------------------------------------------------------------------------------------------- 230°C/W Junction Temperature ------------------------------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------------------- −65°C to 150°C ESD Susceptibility (Note 3) HBM (Human Body Model) ------------------------------------------------------------------------------------------------ 2kV MM (Machine Model) ------------------------------------------------------------------------------------------------------- 200V Recommended Operating Conditions  (Note 4) Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 125°C Electrical Characteristics (VCC = 5V, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Without load Min Typ Max Unit -- -- 200 A VCC Supply Current IVCC VCC Operating Voltage VCC 2.97 5 5.94 V VCC POR Rising VPOR -- 2.8 -- V VCC POR Hysteresis VPOR_Hys -- 0.15 -- V Voltage Detector & MUTE Threshold V5 High Threshold Voltage V5TH 3.92 4 4.08 V V54 High Threshold Voltage V54TH 4.23 4.32 4.41 V VADJ High Threshold Voltage VADJTH 0.98 1 1.02 V Manual Reset High Voltage VIH 2 -- -- V Manual Reset Low Voltage VIL -- -- 0.8 V 45 60 80 ms -- 20 -- s Voltage Detector Deglitch and Delay Voltage Detectors Delay Time TDELAY Voltage Detectors Deglitch Time TDEGLITCH Output : Open Drain RESET Output Low Voltage VOL_RESET VCC = 3.3V, 5mA sinking current at RESET output -- -- 0.3 V CTR Output Low Voltage VOL_CTR VCC = 3.3V, 5mA sinking current at CTR output -- -- 0.3 V Copyright © 2014 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 is a registered trademark of Richtek Technology Corporation. DS9824C-00 August 2014 RT9824C Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2. θJA is measured at TA = 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Copyright © 2014 Richtek Technology Corporation. All rights reserved. DS9824C-00 August 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9824C Typical Operating Characteristics V5 Detector Deglitch Time vs. Temperature V5 Detector Delay Time vs. Temperature 40 425 400 375 350 325 300 VCC = 3.3V 275 VCC = 5V V5 Detector Deglitch Time (μs) V5 Detector Delay Time (ms) 450 35 30 VCC = 5V 25 20 VCC = 3.3V 15 10 250 -50 -25 0 25 50 75 100 -50 125 -25 0 Temperature (°C) V54 Detector Delay Time vs. Temperature 75 100 125 40 425 400 375 350 325 300 VCC = 3.3V 275 VCC = 5V V54 Detector Deglitch Time (μs) V54 Detector Delay Time (ms) 50 V54 Detector Deglitch Time vs. Temperature 450 250 35 30 VCC = 5V 25 20 VCC = 3.3V 15 10 -50 -25 0 25 50 75 100 125 -50 -25 0 Temperature (°C) 25 50 75 100 125 Temperature (°C) VADJ Detector Delay Time vs. Temperature VADJ Detector Deglitch Time vs. Temperature 450 40 425 400 375 350 325 300 VCC = 3.3V 275 VCC = 5V 250 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2014 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 125 VADJ Detector Deglitch Time (μs) VADJ Detector Delay Time (ms) 25 Temperature (°C) 35 30 VCC = 5V 25 20 VCC = 3.3V 15 10 -50 -25 0 25 50 75 100 125 Temperature (°C) is a registered trademark of Richtek Technology Corporation. DS9824C-00 August 2014 RT9824C Power Off from V5 Power On from V5 VCC = 5V VCC = 5V V5 (5V/Div) V5 (5V/Div) CTR (2V/Div) CTR (2V/Div) RESET (2V/Div) RESET (2V/Div) Time (25ms/Div) Time (25ms/Div) Power On from V54 Power Off from V54 VCC = 5V VCC = 5V V54 (5V/Div) V54 (5V/Div) CTR (2V/Div) CTR (2V/Div) RESET (2V/Div) RESET (2V/Div) Time (25ms/Div) Time (25ms/Div) Power On from VADJ Power Off from VADJ VCC = 5V VCC = 5V VADJ (1V/Div) VADJ (1V/Div) CTR (2V/Div) CTR (2V/Div) RESET (2V/Div) RESET (2V/Div) Time (25ms/Div) Copyright © 2014 Richtek Technology Corporation. All rights reserved. DS9824C-00 August 2014 Time (25ms/Div) is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9824C Power On from MR Power Off from MR VCC = 5V VCC = 5V MR (5V/Div) MR (1V/Div) CTR (2V/Div) CTR (2V/Div) RESET (2V/Div) RESET (2V/Div) Time (25ms/Div) Time (25ms/Div) Supply Current vs. Temperature 250 Supply Current (μA) 225 200 175 VCC = 5V 150 VCC = 3.3V 125 100 -50 -25 0 25 50 75 100 125 Temperature (°C) Copyright © 2014 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 is a registered trademark of Richtek Technology Corporation. DS9824C-00 August 2014 RT9824C Application Information 0.50 Maximum Power Dissipation (W) The RT9824C smart voltage detector monitors three voltage levels at the same time to ensure the microprocessor is operated within the recommended input voltage range. In conventional reset IC application, to monitor one power rail needs one reset IC. The RT9824C can monitor three power rails simultaneously, by using just one reset IC. The RT9824C also provides a Manual Reset (MR) function for application easily. Glitch-rejection is implemented in the RT9824C to prevent it from false operation and to eliminate the additional de-bouncing circuitry. Single Layer PCB 0.45 0.40 0.35 0.30 TSOT-23-8 0.25 0.20 0.15 0.10 0.05 0.00 0 Thermal Considerations For continuous operation, do not exceed absolute maximum operation junction temperature. The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : 25 50 75 100 125 Ambient Temperature (°C) Figure 1. Derating Curve of Maximum Power Dissipation PD(MAX) = (TJ(MAX) − TA) / θJA Where T J(MAX) is the maximum operation junction temperature, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification, the maximum junction temperature is 125°C. The junction to ambient thermal resistance θJA is layout dependent. For TSOT-23-8 package, the thermal resistance θJA is 250°C/W on the standard JEDEC 51-3 single layer thermal test board. The maximum power dissipation at TA= 25°C can be calculated by following formula : PD(MAX) = (125°C − 25°C) / (230°C/W) = 0.435W for TSOT-23-8 package The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. The Figure 1 of derating curve allows the designer to see the effect of rising ambient temperature on the maximum power dissipation allowed. Copyright © 2014 Richtek Technology Corporation. All rights reserved. DS9824C-00 August 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9824C Outline Dimension H D L C B b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.700 1.000 0.028 0.039 A1 0.000 0.100 0.000 0.004 B 1.397 1.803 0.055 0.071 b 0.220 0.380 0.009 0.015 C 2.591 3.000 0.102 0.118 D 2.692 3.099 0.106 0.122 e 0.585 0.715 0.023 0.028 H 0.080 0.254 0.003 0.010 L 0.300 0.610 0.012 0.024 TSOT-23-8 Surface Mount Package Richtek Technology Corporation 14F, No. 8, Tai Yuen 1st Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries. www.richtek.com 10 DS9824C-00 August 2014