RT9807-30GB Richtek

RT9807 Micro-Power Voltage Detector with Manual Reset General Description Features zz z zz Monitor System Voltages from 0.9V to 5.5V The RT9807 is a micro-power voltage detector with zz z zz Capacitor-Adjustable Reset Timeout Period deglitched manual reset input which supervises the power zz z zz Manual Reset Input supply voltage level for microprocessors (P) or digital zz z zz Low Quiescent Current systems. It provides internally fixed threshold levels zz z zz High Accuracy 1.5% ranging from 1.2V to 3.3V with 0.1V per step, which covers zz z zz Low Functional Supply Voltage 0.9V most digital applications. It features low supply current of zz z zz N-Channel Open-Drain Output 3A. zz z zz Small SOT-23-5 Package The RT9807 performs supervisory function by sending out zz z zz RoHS Compliant and Halogen Free a reset signal whenever the VDD voltage falls below a preset threshold level. The timeout period of this reset Applications signal can be adjusted via an external capacitor. Once z Computers VDD recovers above the threshold level, the reset signal z Controllers will be released after a certain delay time. To manually z Intelligent Instruments pull reset signal low, just pull the manual reset input (MR) z Critical uP and uC Power Monitoring below the specified logic-low level. z Portable/Battery-Powered Equipment The RT9807 is available in an SOT-23-5 package. Pin Configurations Ordering Information (TOP VIEW) RT9807- VDD CT Package Type 5 4 B : SOT-23-5 Lead Plating System 23 G : Green (Halogen Free and Pb Free) RST GND MR Output Voltage SOT-23-5 12 : 1.2V 13 : 1.3V : Typical Application Circuit 32 : 3.2V R 33 : 3.3V Note : 470k Richtek products are : RT9807 51 VDD RST Reset V DD RoHS compliant and compatible with the current require- C IN 1uF ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 3 4 CT MR GND C CT 2 10nF Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. DS9807-01 April 2011 www.richtek.com 1RT9807 Functional Pin Description Pin No. Pin Name Pin Function RST 1 Reset Output Pin. (Open drain) 2 Ground Pin. GND MR 3 Manual Reset Pin. 4 Connect an external capacitor for setting reset timeout period. CT 5 Supply Voltage Input Pin. VDD Function Block Diagram N-MOSFET RST VDD - Timeout Setting + GND Comparator V REF Manual Reset MR CT Absolute Maximum Ratings (Note 1) z Supply Input Voltage, V ----------------------------------------------------------------------------------------------- 0.3V to 6V DD z Reset Output Voltage, RST --------------------------------------------------------------------------------------------- 0.3V to 6V z Other Pins------------------------------------------------------------------------------------------------------------------- 0.3V to 6V z Power Dissipation, P T = 25C D A SOT-23-5 -------------------------------------------------------------------------------------------------------------------- 0.4W z Package Thermal Resistance (Note 2) SOT-23-5, --------------------------------------------------------------------------------------------------------------- 250C/W JA z Junction Temperature Range-------------------------------------------------------------------------------------------- 150C z Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260C z Storage Temperature Range -------------------------------------------------------------------------------------------- 65C to 150C z ESD Susceptibility (Note 3) HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V Recommended Operating Conditions (Note 4) z Junction Temperature Range-------------------------------------------------------------------------------------------- 40C to 125C z Ambient Temperature Range-------------------------------------------------------------------------------------------- 40C to 85C www.richtek.com DS9807-01 April 2011 2