RT9816 Micro-Power Voltage Detectors with Manual Reset General Description Features The RT9816 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 1.0V to 5V, which covers most digital applications. It features low supply current of 3μA. The RT9816 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a z 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. RT9816 is provided in SC-82 package. z z z z z z z z z z RT9816 - z z z Package Type Y : SC-82 No External Components Required μs Quick Reset within 20μ Built-in Recovery Delay Include 0ms, 55ms, 220ms, 450ms Options 800ns Glitch Immunity of Manual Reset Input Low Functional Supply Voltage 0.9V N-Channel Open-Drain Output Small SC-82 Package RoHS Compliant and 100% Lead (Pb)-Free Applications z Ordering Information Internally Fixed Threshold 1.0V to 5V in 0.1V Step High Accuracy ±1.5% Low Supply Current 3μ μA z Computers Controllers Intelligent Instruments Critical μP and μC Power Monitoring Portable/Battery-Powered Equipment Lead Plating System Marking Information P : Pb Free G : Green (Halogen Free and Pb Free) For marking information, contact our sales representative directly or through a RichTek distributor located in your Threshold Voltage 12 : 1.2V area, otherwise visit our website for detail. 13 : 1.3V : Pin Configurations 49 : 4.9V 50 : 5.0V (TOP VIEW) Reset Active Timeout Period VDD MR A = 0ms (RESET) 4 3 B = 55ms (RESET) C = 220ms (RESET) 2 D = 450ms (RESET) GND RESET/ E = 0ms (RESET) RESET F = 55ms (RESET) G = 220ms (RESET) SC-82 H = 450ms (RESET) Note : 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. DS9816-05 April 2011 www.richtek.com 1 RT9816 Typical Application Circuit 100k Pull Up VDD up RT9816 GND RESET/ RESET RESET/ RESET VDD MR Functional Pin Description Pin Name Pin Function GND Ground Pin RESET Active Low Open-Drain Reset Output RESET Active High Open-Drain Reset Output MR Manual Reset VDD Power Pin Function Block Diagram MR VDD RESET/ RESET VSET CMP Timer N MOS GND Threshold Voltage Setting POR Power On Reset www.richtek.com 2 DS9816-05 April 2011 RT9816 Absolute Maximum Ratings z z z z z z z z (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 Package Thermal Resistance (Note 2) SC-82, θJA --------------------------------------------------------------------------------------------------------------- 400°C Lead Temperature (Soldering, 10sec.) ---------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 125°C ESD Susceptibility (Note 3) HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V Recommended Operating Conditions z z (Note 4) Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range ---------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VDD = 3V, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 0.9 -- 6 V Operating V DD (VOUT) Range VDD Supply Current IDD VTH = 3V , VDD = 4.5V T A = 27°C -- 3 8 μA Reset Threshold VTH T A = 27°C -- 1.2 to 5.0 -- V VIL T A = 27°C, VTH > 1.2V -- -- 0.25V DD VIH T A = 27°C, VTH > 1.2V 0.7V DD -- -- -- 800 -- ns −1.5 -- 1.5 % -- 20 -- μs -- 0 -- 35 55 75 143 220 297 292 450 608 -- -- 0.4 V -- 0.01VTH -- V MR Input Threshold MR Glitch Rejection Threshold Voltage Accuracy ΔVTH TA = 27°C V DD Drop to Reset Delay tRD Drop = V TH -125mV RT9816A/E Reset Active Time Out Period RT9816B/F RT9816C/G tRP VDD ≥ 1.02×VTH RT9816D/H RESET Output Voltage Low VOL Hysteresis Width VHYS DS9816-05 April 2011 3 = VDD < V TH ISINK >3.5mA V ms www.richtek.com 3 RT9816 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 the natural convection at T A = 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. www.richtek.com 4 DS9816-05 April 2011 RT9816 Typical Operating Characteristics Nch Driver Output Current vs. VDS Nch Driver Output Current vs. VDS 60 RT9816A-12 VDD = 1.1V 2 1.6 1.2 VDD = 1.0V 0.8 RT9816C-30 VDD = 2.8V 50 Output Current (mA) Output Current (mA) 2.4 0.4 VDD = 2.5V 40 30 VDD = 2.0V 20 VDD = 1.5V 10 0 0 0 0.3 0.6 0.9 1.2 1.5 0 0.5 1 1.5 7 3.5 RT9816 RT9816A-45 6 Output Volgate (V) 100 Output Current (mA) 3 Output Voltage vs. Input Voltage Nch Driver Output Current vs. VDS 80 60 VDD = 4.4V = 4.0V = 3.5V = 3.0V = 2.5V = 2.0V = 1.5V 40 20 5 4 3 4.5V 2 1 0 1.2V 0 0 1 2 3 4 5 0 1 VDS (V) 2 3 4 5 6 Input Volgate (V) Supply Current vs. Input Voltage 6 Supply Current vs. Input Voltage 4 RT9816A-12 RT9816C-30 3.5 5 80°C Supply Current (uA) Supply Current (uA) 2.5 VDS (V) VDS (V) 120 2 4 25°C 3 2 -30°C 1 80°C 3 2.5 25°C 2 -30°C 1.5 1 0.5 0 0 0 1 2 3 4 Input Voltage (V) DS9816-05 April 2011 5 6 0 1 2 3 4 5 6 Input Voltage (V) www.richtek.com 5 RT9816 Power-Down Reset Delay vs. Temperature Supply Current vs. Input Voltage 4 14 Power-Down Reset Delay (us) RT9816A-45 3.5 Supply Current (uA) 80°C 3 25°C 2.5 -30°C 2 1.5 1 0.5 0 RT9816A-12 12 10 VDROP = 200mV 8 VDROP = 150mV 6 VDROP = 250mV 4 2 0 0 1 2 3 4 5 6 -50 -25 0 Input Voltage (V) Power-Down Reset Delay (us) Power-Down Reset Delay (us) RT9816C-30 35 30 VDROP = 200mV 20 VDROP = 150mV 15 VDROP = 250mV 10 5 0 125 RT9816A-45 40 35 30 25 VDROP = 200mV 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 40 RT9816 5.0V RT9816C-30, VDS = 0.5V 35 Sink Current ISINK (mA) 5 4.5V 4 25 Temperature (°C) Reset Threshold Deviation vs. Temperature Reset Threshold (V) 100 0 -50 6 75 Power-Down Reset Delay vs. Temperature 45 40 25 50 Temperature (°C) Power-Down Reset Delay vs. Temperature 45 25 4.2V 3 2.2V 2 -30°C 30 25°C 25 20 80°C 15 10 5 1.2V 0 1 -50 -25 0 25 50 75 Temperature (°C) www.richtek.com 6 100 125 0 0.5 1 1.5 2 2.5 3 3.5 Input Voltage(V) DS9816-05 April 2011 RT9816 Power-Up Reset Time-Out vs. Temperature Nch Driver Sink Current vs. Input Voltage 50 500 -30°C Sink Current ISINK (mA) RT9816C Power-Up Reset Time-Out (ms) RT9816A-45, VDS = 0.5V 40 25°C 30 80°C 20 10 400 VTH = 2.9V 300 VTH = 3.0V 200 100 0 0 0 1 2 3 4 5 -50 -25 0 25 Input Voltage(V) 100 125 Output Delay Time vs. Load Capacitance Power-Up Reset Time-Out vs. Temperature 1000 RT9816A Output Delay Time (ms) Power-Up Reset Time-Out (us) 75 Temperature (°C) 100 80 60 VTH = 5.0V 40 VTH = 4.5V 20 100 10 VTH = 1.2V 1 0.1 VTH = 4.5V 0 -50 -25 0 25 50 75 100 125 0.01 0.0001 0.0010 60 Nch Driver Output Current (mA)1 RT9816G-31 140 120 100 VDD = 6.0V = 5.5V = 5.0V = 4.5V = 4.0V = 3.5V 80 60 40 0.1000 1.0000 Nch Driver Output Current vs. Input Voltage Nch Driver Output Current vs. VDS 160 0.0100 Load Capacitance (uF) Temperature (°C) Nch Driver Output Current (mA)1 50 20 RT9816G-31 VDS = 0.5V -30°C 50 25°C 40 80°C 30 20 10 0 0 0 1 2 3 VDS (V) DS9816-05 April 2011 4 5 6 0 1 2 3 4 5 6 Input Voltage (V) www.richtek.com 7 RT9816 Output Voltage vs. Input Voltage 7 RT9816G-31 RT9816G-31 6 400 Output Voltage (V) Power Down Reset Time-Out (ms) Power Down Reset Time-Out vs. Temperature 500 300 200 5 4 3 2 100 1 0 0 -50 -25 0 25 50 75 100 125 Temperature (°C) 0 1 2 3 4 5 6 Input Voltage (V) Power-Down Reset Time-Out (us) Power-Down Reset Time-Out vs. Temperature 30 RT9816G-31 25 20 VDROP = 200mV VDROP = 150mV 15 10 VDROP = 250mV 5 0 -50 -25 0 25 50 75 100 125 Temperature (°C) www.richtek.com 8 DS9816-05 April 2011 RT9816 Application Information Multiple Supplies Mainly, the pull-up connected to the RT9816 will connect to the supply voltage that is being monitored at the IC’ s VCC pin. However, some systems may use the open-drain output to level-shift from the monitored supply to reset circuitry powered by some other supply. 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. DS9816-05 April 2011 www.richtek.com 9 RT9816 Outline Dimension 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 Richtek Technology Corporation Richtek Technology Corporation Headquarter Taipei Office (Marketing) 5F, No. 20, Taiyuen Street, Chupei City 5F, No. 95, Minchiuan Road, Hsintien City Hsinchu, Taiwan, R.O.C. Taipei County, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Tel: (8862)86672399 Fax: (8862)86672377 Email: [email protected] Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek. www.richtek.com 10 DS9816-05 April 2011