RT9816

RT9816 RICHTEK | Alldatasheet

Document overview

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Technical content

Features

zzzzz Internally Fixed Threshold 1.0V to 5V in 0.1V Step zzzzz High Accuracy ±±±±±1.5% zzzzz Low Supply Current 3μμμμμA zzzzz No External Components Required zzzzz Quick Reset within 20μμμμμs zzzzz Built-in Recovery Delay Include 0ms, 55ms, 220ms, 450ms Options zzzzz 800ns Glitch Immunity of Manual Reset Input zzzzz Low Functional Supply Voltage 0.9V zzzzz N-Channel Open-Drain Output, zzzzz Small SC-82 Package zzzzz RoHS Compliant and 100% Lead (Pb)-Free Pin Configurations

Applications

z Critical μP and μC Power Monitoring z Portable/Battery-Powered Equipment Micro-Power Voltage Detectors with Manual Reset

Ordering Information

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 V DD voltage falls below a preset threshold level. This reset signal will last the whole period before V DD recovering. Once V DD 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 V IL level. RT9816 is provided in SC-82 package. (TOP VIEW) SC-82 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. Note : RichTek Pb-free and Green products are : \RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. \Suitable for use in SnPb or Pb-free soldering processes. \`100%matte tin (Sn) plating. 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) RT9816 Package Type Y : SC-82 Operating Temperature Range C : Commercial Standard P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) Threshold Voltage 12 : 1.2V 13 : 1.3V 49 : 4.9V 50 : 5.0V VDD MR GND RESET/ RESET 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.

DS9816-03 March 2007www.richtek.com Function Block Diagram Typical Application Circuit 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 RT9816 VDDGND MRRESET/ RESET 100k Pull UpVDD up RESET/ RESET TimerVSET Threshold Voltage Setting POR Power On Reset CMP N MOS GND VDD MR RESET/ RESET

DS9816-03 March 2007 www.richtek.com Absolute Maximum Ratings (Note 1) z Terminal Voltage (with Respect to GND) z Power Dissipation, PD @ TA = 25°C z Package Thermal Resistance (Note 4) z ESD Susceptibility (Note 2)

Electrical Characteristics

(VDD = 3V, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Operating V DD (VOUT) Range V DD 0.9 -- 6 V Supply Current I DD V TH = 3V , VDD = 4.5V TA = 27°C -- 3 8 μA Res et Threshold V TH T A = 27°C -- 1.2 to 5.0 -- V MR Input Threshold VIL T A = 27°C, VTH > 1.2V -- -- 0.25V DD V VIH T A = 27°C, VTH > 1.2V 0.7V DD -- -- MR Glitch Rejection -- 800 -- ns Threshold Voltage Accuracy ΔVTH T A = 27°C −1.5 -- +1.5 % VDD Drop to Reset Delay t RD Drop = V TH -125mV -- 20 -- μs Reset Active Time Out Period RT9816A/E tRP V DD ≥ 1.02×VTH -- 0 -- ms RT9816B/F 35 55 75 ms RT9816C/G 143 220 297 ms RT9816D/H 292 450 608 ms RESET Output Voltage Low V OL 3 = V DD < VTH ISI NK >3.5mA -- -- 0.4 V Hysteresis Width V HYS -- 0.01V TH -- V Recommended Operating Conditions (Note 3)

DS9816-03 March 2007www.richtek.com 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. θ JA 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.

DS9816-03 March 2007 www.richtek.com Typical Operating Characteristics Supply Current vs. Input Voltage 0.5 1.5 2.5 3.5 0123456 Input Voltage (V) Supply Current (uA) RT9816C-30 80°C 25°C -30°C Supply Current vs. Input Voltage 0123456 Input Voltage (V) Supply Current (uA) RT9816A-12 80°C 25°C -30°C Output Voltage vs. Input Voltage 0123456 Input Volgate (V) Output Volgate (V) 4.5V 1.2V RT9816 Nch Driver Output Current vs. VDS 100 120 012345 VDS (V) Output Current (mA) RT9816A-45 VDD = 4.4V = 4.0V = 3.5V = 3.0V = 2.5V = 2.0V = 1.5V Nch Driver Output Current vs. VDS 0 0.5 1 1.5 2 2.5 3 3.5 VDS (V) Output Current (mA) VDD = 2.0V VDD = 1.5V RT9816C-30 VDD = 2.8V VDD = 2.5V Nch Driver Output Current vs. VDS 0.4 0.8 1.2 1.6 2.4 VDS (V) Output Current (mA) VDD = 1.0V VDD = 1.1V RT9816A-12

DS9816-03 March 2007www.richtek.com Nch Driver Sink Current vs. Input Voltage 00 . 511 . 522 . 533 . 5 Input Voltage(V) Sink Current ISINK (mA) RT9816C-30, VDS = 0.5V 80°C 25°C -30°C Reset Threshold Deviation vs. Temperature -50 -25 0 25 50 75 100 125 Temperature Reset Threshold (V) 5.0V 1.2V 4.2V 2.2V (°C) 4.5V RT9816 Power-Down Reset Delay vs. Temperature -50 -25 0 25 50 75 100 125 Temperature Power-Down Reset Delay (us) RT9816A-45 VDROP = 200mV VDROP = 150mV VDROP = 250mV (°C) Power-Down Reset Delay vs. Temperature -50 -25 0 25 50 75 100 125 Temperature Power-Down Reset Delay (us) RT9816C-30 VDROP = 200mV VDROP = 150mV VDROP = 250mV (°C) Supply Current vs. Input Voltage 0.5 1.5 2.5 3.5 0123456 Input Voltage (V) Supply Current (uA) RT9816A-45 80°C 25°C -30°C Power-Down Reset Delay vs. Temperature -50 -25 0 25 50 75 100 125 Temperature Power-Down Reset Delay (us) RT9816A-12 VDROP = 200mV VDROP = 150mV VDROP = 250mV (°C)

DS9816-03 March 2007 www.richtek.com Output Delay Time vs. Load Capacitance 0.01 0.1 100 1000 Load Capacitance (uF) Output Delay Time (ms ) VTH = 1.2V VTH = 4.5V Power-Up Reset Time-Out vs. Temperature 100 -50 -25 0 25 50 75 100 125 Temperature Power-Up Reset Time-Out (us ) VTH = 5.0V VTH = 4.5V RT9816A (°C) Power-Up Reset Time-Out vs. Temperature 100 200 300 400 500 -50 -25 0 25 50 75 100 125 Temperature Power-Up Reset Time-Out (ms) VTH = 2.9V VTH = 3.0V RT9816C (°C) Nch Driver Output Current vs. VDS 100 120 140 160 0123456 VDS (V) Nch Driver Output Current (mA) 1 VDD = 6.0V = 5.5V = 5.0V = 4.5V = 4.0V = 3.5V RT9816G-31 Nch Driver Output Current vs. Input Voltage 0123456 Input Voltage (V) Nch Driver Output Current (mA) 1 RT9816G-31 VDS = 0.5V 80°C 25°C -30°C Nch Driver Sink Current vs. Input Voltage 012345 Input Voltage(V) Sink Current ISINK (mA) RT9816A-45, VDS = 0.5V 80°C 25°C -30°C

DS9816-03 March 2007www.richtek.com Power-Down Reset Time-Out vs. Temperature -50 -25 0 25 50 75 100 125 Temperature Power-Down Reset Time-Out (us ) VDROP = 200mV VDROP = 150mV VDROP = 250mV (°C) RT9816G-31 Power Down Reset Time-Out vs. Temperature 100 200 300 400 500 -50 -25 0 25 50 75 100 125 Temperature Power Down Reset Time-Out (ms ) RT9816G-31 (°C) Output Voltage vs. Input Voltage 0123456 Input Voltage (V) Output Voltage (V) RT9816G-31

DS9816-03 March 2007 www.richtek.com

Application Information

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.

DS9816-03 March 2007www.richtek.com 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 Outline Dimension Dimensions In Millimeters Dimensions In Inches Symbol 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 e D A C b L B H e