RT9817C-12PH

RT9817 Micro-Power Voltage Detectors with Manual Reset General Description The RT9817 is a micro-power voltage detector with deglitched manual reset input 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 RT9817 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. To pull reset signal low manually, just pull the manual reset input (MR) below the specified VIL level. RT9817 is provided in SC-82 and SOT-143 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 800ns Glitch Immunity of Manual Reset Input Low Functional Supply Voltage 0.9V CMOS Push-Pull Output Small SC-82 and SOT-143 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 RT9817 Package Type H : SOT-143 Y : SC-82 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) Pin Configurations (TOP VIEW) VDD 4 1 GND MR 3 2 RESET/ RESET VDD 4 1 GND MR 3 2 RESET/ RESET SOT-143 SC-82 Note : There is no pin1 indicator on top mark for SC-82 and SOT-143 types, and pin 1 will be lower left pin when reading top mark from left to right. Pin2 of SC-82 and Pin1 of SOT143 is wider than other pins in each package. 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. DS9817-07 August 2007 www.richtek.com 1 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. RT9817 Typical Application Circuit VDD up RESET/ RESET RT9817 GND RESET/ RESET VDD MR Functional Pin Description Pin Name GND RESET RESET MR Pin Function Ground Pin Active Low Push-Pull Reset Output Active High Push-Pull Reset Output Manual Reset Power Pin VDD Function Block Diagram VDD MR VDD P MOS VSET Threshold Voltage Setting POR Power On Reset CMP Timer N MOS RESET/ RESET www.richtek.com 2 DS9817-07 August 2007 RT9817 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-82 -------------------------------------------------------------------------------------------------------------------- 0.25W SOT-143 ----------------------------------------------------------------------------------------------------------------- 0.285W Package Thermal Resistance (Note 4) SC-82, θJA --------------------------------------------------------------------------------------------------------------- 400°C SOT-143, θJA ------------------------------------------------------------------------------------------------------------ 350°C 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 RT9817A/E Reset Active Time Out Period RT9817B/F RT9817C/G RT9817D/H Symbol V DD IDD V TH ΔV TH V HYS tRD Test Conditions RT9817A/B/C/D RT9817E/F/G/H V TH = 3 V , VDD = 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 = V TH −125mV --- tRP VDD ≥ 1.02 × V TH 35 143 292 V DD < V TH(MIN) ,ISINK = 3.5mA, V TH ≥ 3V RESET Output Voltage Low V OL V DD < V TH(MIN) ,ISINK = 1.2mA, V TH ≥ 1.8V V TH(MIN) > V DD > 1 V, ISINK = 0 .5mA ---- V To be continued DS9817-07 August 2007 www.richtek.com 3 RT9817 Parameter Symbol Test Conditions V DD > VTH(MAX) , IS OURCE = 800 μA, VTH ≥ 3 V RESET Output Voltage High V OH V DD > VTH(MAX) , IS OURCE = 500 μA, VTH ≥ 1 .8V V DD > VTH(MAX) , IS OURCE = 200 μA, VTH ≥ 1 .1V V DD > VTH(MAX) ,ISINK = 3.5mA, V TH ≥ 3V RESET Output Voltage Low V OL V DD > VTH(MAX) ,ISINK = 1.2mA, V TH ≥ 1.8V V DD > VTH(MAX) ,ISINK = 0.5mA, V TH ≥ 1.2V 1 .1V < V DD < VTH(MIN) , IS OURCE = 200 μA RESET Output Voltage High V OH 1 .8V < V DD < VTH(MIN) , IS OURCE = 500 μA 3 V < VDD < V TH(MIN) , IS OURCE = 800 μA Min VDD − 1.5 0.8 VDD 0.8 VDD ---0.8 VDD 0.8 VDD VDD − 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 DS9817-07 August 2007 RT9817 Typical Operating Characteristics Nch Driver Output Current vs. VDS 2.4 2 Nch Driver Output Current vs. VDS 60 RT9817A-12 VDD = 1.1V RT9817C-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 RT9817A-45 RT9817A 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 RT9817A-12 RT9817C-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) DS9817-07 August 2007 www.richtek.com 5 RT9817 Supply Current vs. Input Voltage 4 Power-Down Reset Delay vs. Temperature 15 RT9817A-45 80°C RT9817A-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 RT9817C-30 RT9817A-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 RT9817C-30, VDS = 0.5V RT9817A-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 DS9817-07 August 2007 RT9817 Reset Threshold Deviation vs. Temperature 6.00 Pch Driver Output Current vs. Input Voltage 25 RT9817 5.0V RT9817C-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 RT9817C RT9817A Power-Up Reset Time-Out (ms) 400 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 RT9817G-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) DS9817-07 August 2007 www.richtek.com 7 RT9817 Nch Driver Output Current vs. Input Voltage Nch Driver Output Current (mA)1 RT9817G-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 RT9817G-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 RT9817G-31 Power-Down Reset Time-Out vs. Temperature Power-Down Reset Time-Out (us) 30 25 20 7 6 RT9817G-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 DS9817-07 August 2007 RT9817 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. DS9817-07 August 2007 www.richtek.com 9 RT9817 Outline Dimension D e H L C B b1 b A e A1 Symbol A A1 B b b1 C D e H L Dimensions In Millimeters Min 0.800 0.050 1.200 0.300 0.760 2.100 2.800 1.900 0.080 0.210 0.150 0.410 Max 1.200 0.150 1.400 0.520 0.920 2.640 3.040 Dimensions In Inches Min 0.031 0.002 0.047 0.012 0.030 0.083 0.110 0.075 0.003 0.008 0.006 0.016 Max 0.047 0.006 0.055 0.020 0.036 0.104 0.120 SOT-143 Surface Mount Package www.richtek.com 10 DS9817-07 August 2007 RT9817 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 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 DS9817-07 August 2007 www.richtek.com 11