® RT9819 Micro-Power Voltage Detectors General Description Features The RT9819 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (μP) or digital systems. It provides internally fixed threshold levels with 0.1V per step ranging from 1.2V to 5V, which covers most digital applications. It features low supply current of 3μA. The RT9819 performs supervisory function by sending out a reset signal whenever the VDD voltage z falls below a preset threshold level. This reset signal will last the whole period before VDD recovering. Once VDD recovered upcrossing the threshold level, the reset signal will be released after a certain delay time. The RT9819 is provided in SC-70-3, SC-82, SOT-23-3 and WDFN-6L 1.6x1.6 packages. z Ordering Information RT9819 - z z z z z z z z No External Components Required μs Quick Reset within 20μ Built-in Recovery Delay Include 0ms, 55ms, 220ms, 450ms Options Low Functional Supply Voltage 0.9V CMOS Push-Pull Output Small SC-70-3, SC-82, SOT-23-3 and WDFN-6L 1.6x1.6 Packages RoHS Compliant and Halogen Free Applications z z Package Type U3 : SC-70-3 V : SOT-23-3 VL : SOT-23-3 (L-Type) Y : SC-82 YR : SC-82 (R-Type) QW : WDFN-6L 1.6x1.6 (W-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Threshold Voltage 12 : 1.2V 13 : 1.3V : 49 : 4.9V 50 : 5.0V Reset Active Timeout Period A = 0ms (RESET) B = 55ms (RESET) C = 220ms (RESET) D = 450ms (RESET) E = 0ms (RESET) F = 55ms (RESET) G = 220ms (RESET) H = 450ms (RESET) Internally Fixed Threshold 1.2V to 5V in 0.1V Step High Accuracy ±1.5% Low Supply Current 3μ μA z z z Computers Controllers Intelligent Instruments Critical μP and μC Power Monitoring Portable/Battery-Powered Equipment Typical Application Circuit VDD RT9819 GND VDD up RESET/ RESET RESET/ RESET Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. 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. Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9819-08 July 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9819 Pin Configurations (TOP VIEW) VDD VDD 3 3 2 2 GND GND RESET/ RESET SC-70-3 RESET/ RESET SOT-23-3 VDD GND NC 4 3 3 2 2 SC-82 SOT-23-3 (L-Type) NC 4 3 NC NC RESET/ RESET 2 GND SC-82 (R-Type) 1 2 3 6 GND RESET/ RESET VDD GND RESET/ RESET RESET/ VDD RESET 7 5 4 VDD NC GND WDFN-6L 1.6x1.6 Functional Pin Description Pin Name Pin Function GND Ground. RESET Active Low Push-Pull Reset Output. RESET Active High Push-Pull Reset Output VDD Power Input. NC No Internal Connection. Function Block Diagram VDD VDD P MOS VSET CMP RESET/ RESET Timer N MOS Threshold Voltage Setting POR Power On Reset Copyright © 2013 Richtek Technology Corporation. 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DS9819-08 July 2013 RT9819 Absolute Maximum Ratings z z z z z z z z (Note 1) Terminal Voltage (with Respect to GND) VDD ---------------------------------------------------------------------------------------------------------------------All Other Inputs -----------------------------------------------------------------------------------------------------Input Current, IVDD --------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SC-70-3/SC-82 ------------------------------------------------------------------------------------------------------SOT-23-3 -------------------------------------------------------------------------------------------------------------WDFN-6L 1.6x1.6 --------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SC-70-3/SC-82, θJA ------------------------------------------------------------------------------------------------SOT-23-3, θJA --------------------------------------------------------------------------------------------------------WDFN-6L 1.6x1.6, θJA ---------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10sec.) -------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Model) ---------------------------------------------------------------------------------------MM (Machine Model) ----------------------------------------------------------------------------------------------- Recommended Operating Conditions z z −0.3V to 6V −0.3V to (VDD + 0.3V) 20mA 0.25W 0.4W 1.7W 400°C/W 250°C/W 58.5°C/W 260°C −65°C to 125°C 2kV 200V (Note 4) Junction Temperature Range -------------------------------------------------------------------------------------Ambient Temperature Range -------------------------------------------------------------------------------------- −40°C to 125°C −40°C to 85°C Electrical Characteristics (VDD = 3V, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit RT9819A/B/C/D 0.9 -- 6 RT9819E/F/G/H 1.1 -- 6 -- 3 8 μA -- 1.2 to 5 -- V Operating VDD (VOUT) Range VDD Supply Current IDD Reset Threshold VTH Threshold Voltage Accuracy ΔVTH −1.5 -- 1.5 % Threshold Voltage Hysteresis VHYS -- 0.01 VTH -- V VDD Drop to Reset Delay tRD -- 20 -- μs -- 0 -- ms 35 55 75 ms 143 220 297 ms 292 450 608 ms VTH = 3V , VDD = 4.5V Drop = VTH −125mV RT9819A/E RT9819B/F Reset Active t Time Out Period RT9819C/G RP VDD ≥ 1.02 × VTH RT9819D/H Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9819-08 July 2013 V is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9819 Parameter Symbol Test Conditions VDD < VTH(MIN) ,ISINK = 3.5mA, VTH ≥ 3V RESET Output Voltage Low VOL VDD < VTH(MIN) ,ISINK = 1.2mA, VTH ≥ 1.8V VTH(MIN) > VDD > 1V, ISINK = 0.5mA VDD > VTH(MAX) , ISOURCE = 800μA, VTH ≥ 3V RESET Output Voltage High VOH VDD > VTH(MAX) , ISOURCE = 500μA, VTH ≥ 1.8V VDD > VTH(MAX) , ISOURCE = 200μA, VTH ≥ 1.1V VDD > VTH(MAX) ,ISINK = 3.5mA, VTH ≥ 3V RESET Output Voltage Low VOL VDD > VTH(MAX) ,ISINK = 1.2mA, VTH ≥ 1.8V VDD > VTH(MAX) ,ISINK = 0.5mA, VTH ≥ 1.2V 1.1V < VDD < VTH(MIN) , ISOURCE = 200μA RESET Output Voltage High VOH 1.8V < VDD < VTH(MIN) , ISOURCE = 500μA 3V < VDD < VTH(MIN) , ISOURCE = 800μA Min Typ Max -- -- 0.4 -- -- 0.3 -- -- 0.3 VDD −1.5 -- -- 0.8 VDD -- -- 0.8 VDD -- -- -- -- 0.4 -- -- 0.3 -- -- 0.3 0.8 VDD -- -- 0.8 VDD -- -- VDD −1.5 -- -- Unit V V V V 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 single-layer and four-layer test board of JEDEC 51. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 is a registered trademark of Richtek Technology Corporation. DS9819-08 July 2013 RT9819 Typical Operating Characteristics Nch Driver Output Current vs. VDS Nch Driver Output Current vs. VDS 2.4 60 RT9819A-12 VDD = 1.1V VDD = 2.8V 50 Output Current (mA) Output Current (mA) 2 RT9819C-30 1.6 1.2 VDD = 1V 0.8 0.4 VDD = 2.5V 40 30 VDD = 2V 20 VDD = 1.5V 10 0 0 0 0.3 0.6 0.9 1.2 1.5 0 0.5 1 1.5 VDS (V) RT9819A-45 Output Voltage (V) Output Current (mA) 3.5 RT9819A 6 80 VDD = 4.4V = 4V = 3.5V = 3V = 2.5V = 2V = 1.5V 60 40 20 5 4 5V 3 2 3V 2.9V 1 0 0 0 1 2 3 4 5 0 1 VDS (V) RT9819A-12 Supply Current IDD (uA) 80°C 4 25°C 3 2 3 4 5 6 Supply Current vs. Input Voltage 4 5 2 Input Voltage (V) Supply Current vs. Input Voltage Supply Current (uA) 3 Output Voltage vs. Input Voltage 7 100 6 2.5 VDS (V) Nch Driver Output Current vs. VDS 120 2 -30°C 1 0 RT9819C-30 80°C 3 25°C 2 -30°C 1 0 0 1 2 3 4 5 Input Voltage (V) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9819-08 July 2013 6 0 1 2 3 4 5 6 Input Voltage (V) is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9819 Supply Current vs. Input Voltage 4 Power-Down Reset Delay vs. Temperature 15 Power-Down Reset Delay (us) RT9819A-45 Supply Current (uA) 80°C 3 25°C -30°C 2 1 0 RT9819A-12 12 9 VDROP = 200mV VDROP = 150mV 6 VDROP = 250mV 3 0 0 1 2 3 4 5 6 -50 -25 0 Power-Down Reset Delay vs. Temperature Power-Down Reset Delay (us) Power-Down Reset Delay (us) RT9819C-30 35 30 VDROP = 200mV 20 VDROP = 150mV 15 VDROP = 250mV 10 5 0 125 RT9819A-45 40 35 30 VDROP = 200mV 25 VDROP = 150mV 20 15 VDROP = 250mV 10 5 -25 0 25 50 75 100 125 -50 -25 0 Temperature (°C) 50 75 100 125 Nch Driver Sink Current vs. Input Voltage 50 RT9819C-30, VDS = 0.5V RT9819A-45, VDS = 0.5V -30°C Sink Current I SINK (mA) -30°C 30 25°C 20 25 Temperature (°C) Nch Driver Sink Current vs. Input Voltage Sink Current I SINK (mA) 100 0 -50 40 75 Power-Down Reset Delay vs. Temperature 45 40 25 50 Temperature (°C) Input Voltage (V) 45 25 80°C 10 40 25°C 30 80°C 20 10 0 0 0 0.5 1 1.5 2 2.5 3 Input Voltage (V) Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 3.5 0 1 2 3 4 5 Input Voltage (V) is a registered trademark of Richtek Technology Corporation. DS9819-08 July 2013 RT9819 Reset Threshold Deviation vs. Temperature Pch Driver Output Current vs. Input Voltage 25 RT9819 RT9819C-30 VDS = 2.1V 5V 5.00 20 4.5V Output Current (mA) Reset Threshold Deviation (V) 6.00 4.2V 4.00 3.00 2.2V 2.00 VDS = 1.5V 15 VDS = 1V 10 VDS = 0.5V 5 1.2V 1.00 0 -50 -25 0 25 50 75 100 0 125 1 2 Temperature (°C) (μs) Power-Up Reset Time-Out (ms) Power-Up Reset Time-Out (ms) 400 VTH = 2.9V VTH = 3V 200 100 -50 RT9819A 75 VTH = 5V 50 VTH = 4.5V 25 -25 0 25 50 75 100 -50 125 -25 160 Nch Driver Output Current (mA) RT9819 100 10 VTH = 3.0V 1 VTH = 2.9V VTH = 5.0V 0.01 0.0001 25 50 75 100 125 Nch Driver Output Current vs. VDS Output Delay Time vs. Load Capacitance 0.1 0 Temperature (°C) Temperature (°C) Output Delay Time (ms) 6 0 0 1000 5 Power-Up Reset Time-Out vs. Temperature 100 RT9819C 300 4 Input Voltage (V) Power-Up Reset Time-Out vs. Temperature 500 3 RT9819G-31 140 120 100 VDD = 6V = 5.5V = 5V = 4.5V = 4V = 3.5V 80 60 40 20 0 0.0010 0.0100 0.1000 Load Capacitance (uF) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9819-08 July 2013 1.0000 0 1 2 3 4 5 6 VDS (V) is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9819 Nch Driver Output Current vs. Input Voltage RT9819G-31 VDS = 0.5V -30°C 50 25°C 40 80°C 30 Power Down Reset Time-Out vs. Temperature Power Down Reset Time-Out (ms) Nch Driver Output Current (mA)1 60 20 10 RT9819G-31 400 300 200 100 0 0 7 1 2 3 4 5 -50 6 -25 0 25 50 75 100 125 Input Voltage (V) Temperature (°C) Output Voltage vs. Input Voltage Power-Down Reset Time-Out vs. Temperature Power-Down Reset Time-Out (us) 0 RT9819G-31 6 Output Voltage (V) 500 5 4 3 2 1 30 RT9819G-31 25 20 VDROP = 200mV VDROP = 150mV 15 10 VDROP = 250mV 5 0 0 0 1 2 3 4 5 Input Voltage (V) Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 6 -50 -25 0 25 50 75 100 125 Temperature (°C) is a registered trademark of Richtek Technology Corporation. DS9819-08 July 2013 RT9819 Application Information Benefits of Highly Accurate Reset Threshold Most μP supervisor ICs have reset threshold voltages between 1% and 1.5% below the value of nominal supply voltages. This ensures a reset will not occur within 1% of the nominal supply, but will occur when the supply is 1.5% below nominal. Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9819-08 July 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9819 Outline Dimension H D L C B e A A1 b Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.800 1.100 0.031 0.044 A1 0.000 0.100 0.000 0.004 B 1.150 1.350 0.045 0.054 b 0.150 0.400 0.006 0.016 C 1.800 2.450 0.071 0.096 D 1.800 2.250 0.071 0.089 e 1.300 0.051 H 0.080 0.260 0.003 0.010 L 0.210 0.460 0.008 0.018 SC-70-3 Surface Mount Package Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 is a registered trademark of Richtek Technology Corporation. DS9819-08 July 2013 RT9819 D e H L B C b1 b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.800 1.100 0.031 0.043 A1 0.000 0.100 0.000 0.004 B 1.150 1.350 0.045 0.053 b 0.150 0.400 0.006 0.016 b1 0.350 0.500 0.014 0.020 C 1.800 2.450 0.071 0.096 D 1.800 2.200 0.071 0.087 e 1.300 0.051 H 0.080 0.260 0.003 0.010 L 0.200 0.460 0.008 0.018 SC-82 Surface Mount Package Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9819-08 July 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT9819 H D L C B e A A1 b Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.889 1.295 0.035 0.051 A1 0.000 0.152 0.000 0.006 B 1.397 1.803 0.055 0.071 b 0.356 0.508 0.014 0.020 C 2.591 2.997 0.102 0.118 D 2.692 3.099 0.106 0.122 e 1.803 2.007 0.071 0.079 H 0.080 0.254 0.003 0.010 L 0.300 0.610 0.012 0.024 SOT-23-3 Surface Mount Package Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 is a registered trademark of Richtek Technology Corporation. DS9819-08 July 2013 RT9819 2 1 2 1 DETAIL A Pin #1 ID and Tie Bar Mark Options Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.700 0.800 0.028 0.031 A1 0.000 0.050 0.000 0.002 A3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 D 1.550 1.650 0.061 0.065 D2 0.950 1.050 0.037 0.041 E 1.550 1.650 0.061 0.065 E2 0.550 0.650 0.022 0.026 e L 0.500 0.190 0.020 0.290 0.007 0.011 W-Type 6L DFN 1.6x1.6 Package Richtek Technology Corporation 5F, No. 20, Taiyuen 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. DS9819-08 July 2013 www.richtek.com 13