® 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 1.2V 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 preset z 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 z RT9816 - 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 1.2V 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 Pin Configurations P : Pb Free G : Green (Halogen Free and Pb Free) (TOP VIEW) Threshold Voltage VDD MR 12 : 1.2V 4 3 13 : 1.3V : 2 49 : 4.9V GND RESET/ 50 : 5.0V RESET Reset Active Timeout Period SC-82 A = 0ms (RESET) B = 55ms (RESET) C = 220ms (RESET) Marking Information D = 450ms (RESET) For marking information, contact our sales representative E = 0ms (RESET) F = 55ms (RESET) directly or through a Richtek distributor located in your G = 220ms (RESET) area. H = 450ms (RESET) 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. DS9816-06 March 2013 is a registered trademark of Richtek Technology Corporation. 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. RESET Active Low Open-Drain Reset Output. RESET Active High Open-Drain Reset Output. MR Manual Reset. VDD Supply Voltage Input. Function Block Diagram MR VDD RESET/ RESET VSET Threshold Voltage Setting CMP Timer N MOS GND POR Power On Reset Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9816-06 March 2013 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 Model) ------------------------------------------------------------------------------------------ 2kV 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 3 = VDD < V TH ISINK >3.5mA Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9816-06 March 2013 V ms is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9816 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 low effective thermal conductivity single-layer test board per JEDEC 51-3. 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. DS9816-06 March 2013 RT9816 Typical Operating Characteristics Nch Driver Output Current vs. VDS Nch Driver Output Current vs. VDS 2.4 60 RT9816A-12 VDD = 1.1V 1.6 1.2 VDD = 1.0V 0.8 VDD = 2.8V 50 Output Current (mA) Output Current (mA) 2.0 RT9816C-30 VDD = 2.5V 40 30 VDD = 2.0V 20 VDD = 1.5V 10 0.4 0 0.0 0 0.3 0.6 0.9 1.2 0 1.5 0.5 1 1.5 VDS (V) 3.5 RT9816 RT9816A-45 6 Output Voltage (V) Output Current (mA) 3 Output Voltage vs. Input Voltage 7 100 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 1.2V 0 0 0 1 2 3 4 0 5 1 Supply Current vs. Input Voltage 6 RT9816A-12 4 5 6 RT9816C-30 3.5 Supply Current (μA) 80°C 4 25°C 3 2 3 Supply Current vs. Input Voltage 4.0 5 2 Input Voltage (V) VDS (V) Supply Current (μA) 2.5 VDS (V) Nch Driver Output Current vs. VDS 120 2 -30°C 1 80°C 3.0 2.5 25°C 2.0 -30°C 1.5 1.0 0.5 0 0.0 0 1 2 3 4 5 Input Voltage (V) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9816-06 March 2013 6 0 1 2 3 4 5 6 Input Voltage (V) is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9816 Power Down Reset Delay vs. Temperature Supply Current vs. Input Voltage 4.0 14 Supply Current (μA) Power Down Reset Delay (µs) RT9816A-45 3.5 80°C 3.0 25°C 2.5 -30°C 2.0 1.5 1.0 0.5 0.0 RT9816A-12 12 10 8 VDROP = 200mV VDROP = 250mV 4 2 0 0 1 2 3 4 5 6 -50 -25 0 Input Voltage (V) Power Down Reset Delay (µs) 1 Power Down Reset Delay (µs) RT9816C-30 35 30 VDROP = 200mV 20 VDROP = 150mV 15 VDROP = 250mV 10 5 -50 100 125 RT9816A-45 40 35 30 25 VDROP = 200mV VDROP = 150mV 20 15 VDROP = 250mV 10 5 -25 0 25 50 75 100 -50 125 -25 0 Reset Threshold Deviation vs. Temperature RT9816 5.0V 75 100 125 RT9816C-30, VDS = 0.5V Sink Current ISINK (mA) 35 4.5V 4 50 Nch Driver Sink Current vs. Input Voltage 40 5 25 Temperature (°C) Temperature (°C) Reset Threshold (V) 75 0 0 6 50 Power Down Reset Delay vs. Temperature 45 40 25 25 Temperature (°C) Power Down Reset Delay vs. Temperature 45 VDROP = 150mV 6 4.2V 3 2.2V 2 -30°C 30 25°C 25 20 80°C 15 10 5 1.2V 1 0 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 125 0 0.5 1 1.5 2 2.5 3 3.5 Input Voltage (V) is a registered trademark of Richtek Technology Corporation. DS9816-06 March 2013 RT9816 Nch Driver Sink Current vs. Input Voltage Power Up Reset Time-Out vs. Temperature 50 500 Power Up Reset Time-Out (ms) RT9816A-45, VDS = 0.5V Sink Current ISINK (mA) -30°C 40 25°C 30 80°C 20 10 RT9816C 400 VTH = 2.9V 300 200 VTH = 3.0V 100 0 0 0 1 2 3 4 -50 5 -25 0 Power Up Reset Time-Out vs. Temperature 100 125 Output Delay Time vs. Load Capacitance RT9816A Output Delay Time (ms) Power Up Reset Time-Out (µs) 75 1000 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 0.1000 1.0000 Nch Driver Output Current vs. Input Voltage Nch Driver Output Current vs. VDS 160 0.0100 Load Capacitance (µF) Temperature (°C) 60 RT9816G-31 Nch Driver Output Current (mA)1 Nch Driver Output Current (mA)1 50 Temperature (°C) Input Voltage (V) 100 25 140 120 100 VDD = 6.0V = 5.5V = 5.0V = 4.5V = 4.0V = 3.5V 80 60 40 20 50 RT9816G-31 VDS = 0.5V -30°C 25°C 40 80°C 30 20 10 0 0 0 1 2 3 4 5 VDS (V) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9816-06 March 2013 6 0 1 2 3 4 5 6 Input Voltage (V) is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9816 Output Voltage vs. Input Voltage 500 7 RT9816G-31 RT9816G-31 6 400 Output Voltage (V) Power Down Reset Time-Out (ms) Power Down Reset Time-Out vs. Temperature 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 (µs) Power Down Reset Time-Out vs. Temperature 30 RT9816G-31 25 20 VDROP = 200mV 15 10 VDROP = 150mV VDROP = 250mV 5 0 -50 -25 0 25 50 75 100 125 Temperature (°C) Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 is a registered trademark of Richtek Technology Corporation. DS9816-06 March 2013 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. Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9816-06 March 2013 is a registered trademark of Richtek Technology Corporation. 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 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. www.richtek.com 10 DS9816-06 March 2013