RT9819E-50GVL

RT9819 Micro-Power Voltage Detectors General Description 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 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. RT9819 is provided in SC-70-3, SC-82 and SOT-23-3 packages. Features Internally Fixed Threshold 1.2V to 5V in 0.1V Step High Accuracy ±1.5% Low Supply Current 3μA No External Components Required Quick Reset within 20μs 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 and SOT-23-3 Packages RoHS Compliant and 100% Lead (Pb)-Free Applications Computers Controllers Intelligent Instruments Critical μP and μC Power Monitoring Portable/Battery-Powered Equipment Ordering Information RT9819 Package Type U3 : SC-70-3 V : SOT-23-3 VL : SOT-23-3 (L-Type) Y : SC-82 YR : SC-82 (R-Type) Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) 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) Note : RichTek Pb-free and Green 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. 100%matte tin (Sn) plating. DS9819-05 August 2007 Marking Information For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail. Typical Application Circuit RT9819 VDD up RESET/ RESET RESET/ RESET GND VDD www.richtek.com 1 RT9819 Pin Configurations (TOP VIEW) VDD 3 1 GND 2 RESET/ RESET GND 4 1 RESET/ RESET NC 3 2 VDD RESET/ RESET 4 1 VDD NC 3 2 GND 1 GND VDD 3 2 RESET/ RESET VDD 3 1 RESET/ RESET 2 GND SC-70-3 SC-82 SC-82 (R-Type) SOT-23-3 SOT-23-3 (L-Type) Note : There is no pin1 indicator on top mark for SC-82 type, and pin 1 will be lower left pin when reading top mark from left to right. Pin2 of SC-82 is wider than other pins. Functional Pin Description Pin Name GND RESET RESET VDD Pin Function Ground Active Low Push-Pull Reset Output Active High Push-Pull Reset Output Power Pin Function Block Diagram VDD VDD P MOS VSET Threshold Voltage Setting POR Power On Reset CMP Timer N MOS RESET/ RESET www.richtek.com 2 DS9819-05 August 2007 RT9819 Absolute Maximum Ratings (Note 1) Terminal Voltage (with Respect to GND) VDD ------------------------------------------------------------------------------------------------------------------------ −0.3V to 6.0V All Other Inputs -------------------------------------------------------------------------------------------------------- −0.3V to VDD+0.3V Input Current, IVDD ----------------------------------------------------------------------------------------------------- 20mA Power Dissipation, PD @ TA = 25°C SC-70-3/SC-82 --------------------------------------------------------------------------------------------------------- 0.25W SOT-23-3 ---------------------------------------------------------------------------------------------------------------- 0.4W Package Thermal Resistance (Note 4) SC-70-3/SC-82, θJA --------------------------------------------------------------------------------------------------- 400°C /W SOT-23-3, θJA ----------------------------------------------------------------------------------------------------------- 250°C /W Lead Temperature (Soldering, 10sec.) ---------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 125°C ESD Susceptibility (Note 2) HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V Recommended Operating Conditions (Note 3) Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range ---------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VDD = 3V, TA = 25°C, unless otherwise specified) Parameter O perating V DD (VOUT) Range S upply Current R eset Threshold Threshold Voltage Accuracy Threshold Voltage Hysteresis V DD Drop to Reset Delay RT9819A/E Reset Active Time Out Period RT9819B/F RT9819C/G RT9819D/H Symbol V DD IDD V TH ΔVTH V HYS tRD Test Conditions RT9819A/B/C/D RT9819E/F/G/H VT H = 3V , V DD = 4.5V Min 0.9 1.1 --− 1.5 -- Typ --3 1.2 to 5.0 -0.01 VTH 20 0 55 220 450 ---- Max 6 6 8 -+1.5 ---75 297 608 0.4 0.3 0.3 Units V μA V % V μs ms ms ms ms Drop = VTH − 125mV --- tRP VDD ≥ 1 .02 × VTH 35 143 292 VDD < VTH(MIN) ,ISINK = 3 .5mA, VTH ≥ 3V RESET Output Voltage Low V OL VDD < VTH(MIN) ,ISINK = 1 .2mA, VTH ≥ 1.8V VTH(MIN) > VDD > 1V, ISINK = 0.5mA ---- V To be continued DS9819-05 August 2007 www.richtek.com 3 RT9819 Parameter Symbol Test Conditions VDD > VTH(MAX) , ISOURCE = 800 μA, V TH ≥ 3 V RESET Output Voltage High VOH VDD > VTH(MAX) , ISOURCE = 500 μA, V TH ≥ 1 .8V VDD > VTH(MAX) , ISOURCE = 200 μA, V TH ≥ 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 < V DD < VTH(MIN) , ISOURCE = 200 μA RESET Output Voltage High VOH 1.8V < V DD < VTH(MIN) , ISOURCE = 500 μA 3V < V DD < V TH(MIN) , ISOURCE = 800 μA Min V DD −1.5 0.8 V DD 0.8 V DD ---0.8 V DD 0.8 V DD V DD −1.5 Typ ---------Max ---0.4 0.3 0.3 ---V V V Units 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. Devices are ESD sensitive. Handling precaution recommended. Note 3. The device is not guaranteed to function outside its operating conditions. Note 4. θJA i s measured in the natural convection at T A = 25 °C on a low effective thermal conductivity test board of JEDEC 51-3 thermal measurement standard. www.richtek.com 4 DS9819-05 August 2007 RT9819 Typical Operating Characteristics Nch Driver Output Current vs. VDS 2.4 2 Nch Driver Output Current vs. VDS 60 RT9819A-12 VDD = 1.1V RT9819C-30 VDD = 2.8V VDD = 2.5V 50 Output Current (mA) 1.6 1.2 Output Current (mA) 40 30 VDD = 2.0V 20 10 0 VDD = 1.0V 0.8 0.4 0 0 0.3 0.6 0.9 1.2 1.5 VDD = 1.5V 0 0.5 1 1.5 2 2.5 3 3.5 VDS (V) VDS (V) Nch Driver Output Current vs. VDS 120 100 Output Voltage vs. Input Voltage 7 6 RT9819A-45 RT9819A Output Current (mA) Output Voltage (V) 80 60 40 20 0 0 1 2 3 4 5 5 4 VDD = 4.4V = 4.0V = 3.5V = 3.0V = 2.5V = 2.0V = 1.5V 5.0V 3 2 1 0 0 1 2 3 4 5 6 2.9V 3.0V VDS (V) Input Voltage (V) Supply Current vs. Input Voltage 6 5 Supply Current vs. Input Voltage 4 RT9819A-12 RT9819C-30 80°C 25°C Supply Current IDD (uA) Supply Current (uA) 80°C 3 4 25°C 3 2 1 0 0 1 2 3 4 5 6 2 -30°C 1 -30°C 0 0 1 2 3 4 5 6 Input Voltage (V) Input Voltage (V) DS9819-05 August 2007 www.richtek.com 5 RT9819 Supply Current vs. Input Voltage 4 Power-Down Reset Delay vs. Temperature 15 RT9819A-45 80°C RT9819A-12 Power-Down Reset Delay (us) Supply Current (uA) 3 12 25°C -30°C 9 2 VDROP = 200mV VDROP = 150mV 6 1 VDROP = 250mV 3 0 0 1 2 3 4 5 6 0 -50 -25 0 25 50 75 100 125 Input Voltage (V) Temperature (°C) Power-Down Reset Delay vs. Temperature 45 Power-Down Reset Delay vs. Temperature 45 RT9819C-30 RT9819A-45 Power-Down Reset Delay (us) 35 30 25 20 15 10 5 0 -50 -25 0 25 50 75 100 125 Power-Down Reset Delay (us) 40 40 35 30 25 20 15 VDROP = 200mV VDROP = 150mV VDROP = 200mV VDROP = 150mV VDROP = 250mV VDROP = 250mV 10 5 0 -50 -25 0 25 50 75 100 125 Temperature (°C) Temperature (°C) Nch Driver Sink Current vs. Input Voltage 40 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) Sink Current I SINK (mA) -30°C 30 40 25°C 25°C 30 20 80°C 80°C 20 10 10 0 0 0.5 1 1.5 2 2.5 3 3.5 0 0 1 2 3 4 5 Input Voltage (V) Input Voltage (V) www.richtek.com 6 DS9819-05 August 2007 RT9819 Reset Threshold Deviation vs. Temperature 6.00 Pch Driver Output Current vs. Input Voltage 25 RT9819 5.0V RT9819C-30 VDS = 2.1V Reset Threshold Deviation (V) 5.00 20 Output Current (mA) 4.5V 4.00 4.2V VDS = 1.5V 15 VDS = 1.0V 10 3.00 2.2V 2.00 5 VDS = 0.5V 1.2V 1.00 -50 -25 0 25 50 75 100 125 0 0 1 2 3 4 5 6 Temperature (°C) Input Voltage (V) Power-Up Reset Time-Out vs. Temperature 500 Power-Up Reset Time-Out vs. Temperature 100 RT9819C RT9819A Power-Up Reset Time-Out (ms) 400 ( μs) Power-Up Reset Time-Out (ms) 75 300 VTH = 2.9V 50 VTH = 5.0V VTH = 4.5V 200 VTH = 3.0V 25 100 0 -50 -25 0 25 50 75 100 125 0 -50 -25 0 25 50 75 100 125 Temperature (°C) Temperature (°C) Output Delay Time vs. Load Capacitance 1000 Nch Driver Output Current vs. VDS 160 RT9819 RT9819G-31 Nch Driver Output Current (mA) 140 120 100 80 60 40 20 0 Output Delay Time (ms) 100 10 VTH = 3.0V 1 VDD = 6.0V = 5.5V = 5.0V = 4.5V = 4.0V = 3.5V 0.1 VTH = 2.9V VTH = 5.0V 0.01 0.0001 0.0010 0.0100 0.1000 1.0000 0 1 2 3 4 5 6 Load Capacitance (uF) VDS (V) DS9819-05 August 2007 www.richtek.com 7 RT9819 Nch Driver Output Current vs. Input Voltage Nch Driver Output Current (mA)1 RT9819G-31 VDS = 0.5V Power Down Reset Time-Out vs. Temperature Power Down Reset Time-Out (ms) 500 60 50 40 30 20 10 0 RT9819G-31 400 -30°C 25°C 300 80°C 200 100 0 0 1 2 3 4 5 6 -50 -25 0 25 50 75 100 125 Input Voltage (V) Temperature (°C) Output Voltage vs. Input Voltage RT9819G-31 Power-Down Reset Time-Out vs. Temperature Power-Down Reset Time-Out (us) 30 25 20 7 6 RT9819G-31 Output Voltage (V) 5 4 3 2 1 0 0 1 2 3 4 5 6 VDROP = 200mV 15 10 5 0 -50 -25 0 25 50 75 100 125 VDROP = 150mV VDROP = 250mV Input Voltage (V) Temperature (°C) www.richtek.com 8 DS9819-05 August 2007 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. DS9819-05 August 2007 www.richtek.com 9 RT9819 Outline Dimension D H L C B e A A1 b Symbol A A1 B b C D e H L Dimensions In Millimeters Min 0.800 0.000 1.150 0.150 1.800 1.800 1.300 0.080 0.210 0.260 0.460 Max 1.100 0.100 1.350 0.400 2.450 2.250 Dimensions In Inches Min 0.031 0.000 0.045 0.006 0.071 0.071 0.051 0.003 0.008 0.010 0.018 Max 0.044 0.004 0.054 0.016 0.096 0.089 SC-70-3 Surface Mount Package www.richtek.com 10 DS9819-05 August 2007 RT9819 D e H L C B b b1 A e A1 Symbol A A1 B b b1 C D e H L Dimensions In Millimeters Min 0.800 0.000 1.150 0.150 0.350 1.800 1.800 1.300 0.080 0.200 0.260 0.460 Max 1.100 0.100 1.350 0.400 0.500 2.450 2.200 Dimensions In Inches Min 0.031 0.000 0.045 0.006 0.014 0.071 0.071 0.051 0.003 0.008 0.010 0.018 Max 0.043 0.004 0.053 0.016 0.020 0.096 0.087 SC-82 Surface Mount Package DS9819-05 August 2007 www.richtek.com 11 RT9819 D H L C B e A A1 b Symbol A A1 B b C D e H L Dimensions In Millimeters Min 0.889 0.000 1.397 0.356 2.591 2.692 1.803 0.080 0.300 Max 1.295 0.152 1.803 0.508 2.997 3.099 2.007 0.254 0.610 Dimensions In Inches Min 0.035 0.000 0.055 0.014 0.102 0.106 0.071 0.003 0.012 Max 0.051 0.006 0.071 0.020 0.118 0.122 0.079 0.010 0.024 SOT-23-3 Surface Mount Package Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Richtek Technology Corporation Taipei Office (Marketing) 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com www.richtek.com 12 DS9819-05 August 2007