Preliminary Datasheet LP3808 High-precision Low Voltage Detector General Description LP3808 is a series of high precision voltage detector with ultra low current consumption(500nA typ. at Vdd=3.0V). It can work at very low voltage, which makes it perfect for system reset. LP3808 is composed of high precision voltage reference, comparator, output driver and resistor array. Internally preset detect voltage has a low temperature drift and requires no external trimming. Two type of output, CMOS and N-channel open-drain are available.LP3808 is available in SOT-89-3,SOT-23-3, SOT23-5 packages which is Pb free. □ □ □ □ □ □ High-precision detection Voltage 2% Detection Voltage 0.9V~6.0V (in 0.1V steps) Precise hysteresis 4% typ. Operating Voltage range 0.7V~10V Ultra-low current consumption 500nA typ. (at VDD 3.0V) Two Output forms CMOS and N-channel open-drain Application Ordering Information LP3808 - Feature Power monitor for portable equipment such as PDA,DSC,Mobile phone,Notebook,MP3 CPU and Logic Circuit Reset Battery Checker Battery Back-up Circuit Power Failure Detector F: Pb-Free Package Type B3: SOT23-3 B5: SOT23-5 X3: SOT89-3 Output Type C: CMOS Output N: Nch Open Drain Detector Voltage 09: 0.9V 10: 1.0V . . . 50: 5.0V 60: 6.0V Pin Assignment Pin Description SOT89 1 2 3 Marketing information Pin Number SOT23 SOT25 1 1 3 2 2 3 4,5 Pin Name Vout VDD VSS NC Function Voltage Detection output Pin Voltage input pin GND pin No Connection Please see website. LP3808 – 00 Ver. 1.0 Datasheet Dec.-2006 Page 1 of 5 Preliminary Datasheet LP3808 Block diagram Nch Output Open Drain CMOS Output Type Absolute Maximum Ratings Input Voltage range ----------------------------------------------------------------------------------- -0.3V~12V Output Voltage range --------------------------------------------------------------------------------- -0.3V~12V Maximum Output current----------------------------------------------------------------------------- 70mA Maximum power dissipation------------------------------------------------------------------------- 150mW Ambient temperature---------------------------------------------------------------------------------- -40~+70 C Storage temperature ---------------------------------------------------------------------------------- -40~125 C Lead temperature and time-------------------------------------------------------------------------- 260 C,10S Electrical Characteristics (LP3808-27B3F,T=25°C, Unless otherwise specified.) Symbol Parameter Conditions -VDET VHYS ISS VDDH VDDL IOUT TPLH Detector Threshold Detector Threshold Hysteresis Current consumption Maximum operating voltage Minimum Operating voltage Output current Output Delay Time LP3808 – 00 Ver. 1.0 Datasheet Min. 2.646 0.054 Nch VDS=0.05V VDD=0.70V Pch VDS=-2.1V VDD=4.50V Reference data Typ. 2.7 0.108 0.5 Unit Max. 2.754 0.162 1 10 0.5 V 0.01 0.05 mA 1.0 2.0 mA 20 Dec.-2006 V V uA V Page 2 of 5 uS Preliminary Datasheet LP3808 Package information LP3808 – 00 Ver. 1.0 Datasheet Dec.-2006 Page 3 of 5 Preliminary Datasheet LP3808 – 00 Ver. 1.0 Datasheet Dec.-2006 LP3808 Page 4 of 5 Preliminary Datasheet LP3808 – 00 Ver. 1.0 Datasheet Dec.-2006 LP3808 Page 5 of 5