RT9807-30GB

® RT9807 Micro-Power Voltage Detector with Manual Reset General Description Features The RT9807 is a micro-power voltage detector with deglitched manual reset input which supervises the power supply voltage level for microprocessors (μP) or digital systems. It provides internally fixed threshold levels ranging from 1.2V to 3.3V with 0.1V per step, which covers most digital applications. It features low supply current of 3μA.  Monitor System Voltages from 0.9V to 5.5V  Capacitor-Adjustable Reset Timeout Period Manual Reset Input Low Quiescent Current High Accuracy ±1.5% Low Functional Supply Voltage 0.9V N-Channel Open-Drain Output Small SOT-23-5 Package RoHS Compliant and Halogen Free The RT9807 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a preset threshold level. The timeout period of this reset signal can be adjusted via an external capacitor. Once VDD recovers above the threshold level, the reset signal will be released after a certain delay time. To manually pull reset signal low, just pull the manual reset input (MR) below the specified logic-low level. The RT9807 is available in an SOT-23-5 package. Ordering Information        Applications      Computers Controllers Intelligent Instruments Critical uP and uC Power Monitoring Portable/Battery-Powered Equipment Pin Configurations (TOP VIEW) RT9807Package Type B : SOT-23-5 VDD CT 5 4 Lead Plating System G : Green (Halogen Free and Pb Free) Output Voltage 12 : 1.2V 13 : 1.3V : 32 : 3.2V 33 : 3.3V 2 RST GND MR SOT-23-5 Typical Application Circuit R 470k Note : Richtek products are :  RoHS compliant and compatible with the current require-  Suitable for use in SnPb or Pb-free soldering processes. ments of IPC/JEDEC J-STD-020. Marking Information 3 VDD RT9807 5 1 VDD RST CIN 1uF 3 MR GND 2 CT 4 Reset CCT 10nF For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9807-04 January 2019 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9807 Functional Pin Description Pin No. Pin Name Pin Function 1 RST Reset Output Pin. (Open drain) 2 GND Ground Pin. 3 MR Manual Reset Pin. 4 CT Connect an external capacitor for setting reset timeout period. 5 VDD Supply Voltage Input Pin. Function Block Diagram N-MOSFET - VDD + Comparator VREF Timeout Setting GND Manual Reset MR Absolute Maximum Ratings           CT (Note 1) Supply Input Voltage, VDD ----------------------------------------------------------------------------------------------Reset Output Voltage, RST --------------------------------------------------------------------------------------------Other Pins ------------------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SOT-23-5 -------------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SOT-23-5, θJA --------------------------------------------------------------------------------------------------------------Junction Temperature Range -------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Mode) ---------------------------------------------------------------------------------------------MM (Machine Mode) ------------------------------------------------------------------------------------------------------ Recommended Operating Conditions  RST −0.3V to 6V −0.3V to 6V −0.3V to 6V 0.4W 250°C/W 150°C 260°C −65°C to 150°C 2kV 200V (Note 4) Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9807-04 January 2019 RT9807 Electrical Characteristics (TA = 0 to 70°C, unless otherwise specified) Parameter Symbol Operating VDD Range VDD Supply Current IDD Reset Threshold VTH Threshold Voltage Accuracy VTH Threshold Voltage Hysteresis VHYS Test Conditions Min Typ Max 0.9 -- 5.5 Temp = 0 to 70°C 1 -- 5.5 VTH = 3V, VDD = 4.5V -- 3 5 A 1.2 -- 3.3 V 1.5 -- 1.5 2 -- 2 -- 50 x VTH -- mV -- 100 -- ppm/C Temp = 25°C Temp = 25°C Temp = 0 to 70°C Reset Threshold Tempco Unit V % VDD Drop to Reset Delay tRP Drop = VTH – 250mV -- 100 -- s RST Output Voltage Low (Note 5) VOL VDD < VTH(min.), ISINK = 3.5mA -- -- 0.4 V VIH 0.7VDD -- -- VIL -- -- 0.25VDD MR Glitch Rejection -- 80 -- ns MR to Reset Propagation Delay tMR -- 4 -- s MR Pull-up Resistance RMR -- 20 -- k Reset Timeout Period tRP 2 5 7 0.15 0.275 0.4 CT Source Current IRAMP -- 240 -- nA CT Source Threshold Voltage VTH-RAMP -- 0.65 -- V -- 33 -- mV Logic-High MR Input Threshold voltage Logic-Low CCT = 1500pF CCT = 0pF CT Threshold Hysteresis V ms Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for stress ratings. 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 for extended periods may remain possibility to affect device reliability. Note 2. θJA is measured in natural convection at TA = 25°C on a low effective thermal conductivity test board of JEDEC 51-3 thermal measurement standard. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. The voltage VOL can be calculated by VOL = VDD - Ir x R. Where R is the pull-up resistor and Ir is the current flowing through the pull-up resistor. For typical application R = 100kΩ, VOL is less than 0.2V. Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9807-04 January 2019 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9807 Typical Operating Characteristics Supply Current vs. Input Voltage CT Threshold Voltage vs. Temperature 6 Supply Current (μA) 5 TA = 125°C TA = 85°C TA = 25°C 4 3 TA = −40°C 2 1 CT Threshold Voltage (V) 0.67 0.66 Rising 0.65 0.64 0.63 Falling 0.62 0.61 CT Open 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 R = 470kΩ 0.6 5.5 -50 -25 0 150 100 10 1 VDD = 5V, R = 470kΩ 0.1 1 10 100 VDD Drop Reset Delay Time (μs) Reset Delay Time (ms) 1000 0.01 75 100 125 VDD = 5V, CT Open, R = 470kΩ 130 110 90 70 50 -50 1000 -25 0 Cpacitance (nF) 25 50 75 100 125 Temperature (°C) Power On Reset Delay Time vs. Temperature Detector Threshold vs. Temperature 1.7 350 1.65 Rising 1.6 Falling 1.55 1.5 1.45 VDD = 5V, CT Open, R = 470kΩ 1.4 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 125 Power On Reset Delay Time (μs) Detector Threshold (V) 50 VDD Drop Reset Delay Time vs. Temperature Reset Delay Time vs Capacitance 10000 0.1 0.001 25 Temperature (°C) Input Voltage (V) 300 250 200 150 VDD = 5V, CT Open, R = 470kΩ 100 -50 -25 0 25 50 75 100 125 Temperature (°C) is a registered trademark of Richtek Technology Corporation. DS9807-04 January 2019 RT9807 Application Information VCC The RT9807 provides adjustable reset delay time to fit the need of a variety of μP applications. The reset delay time of the RT9807 can be adjusted by connecting a capacitor between the CT pin and GND. The CT capacitor must fit the need of low-leakage (