BL8506B Voltage Detectors, BL8506B Series General Description Features BL8506B Series are a set of three-terminal Highly accuracy： ±2% low power voltage detectors implemented in NMOS Low power consumption：TYP 1.8uA (Vin=3V) technology. Each voltage detector in the series Detect voltage range：2.0V~7.0V in 0.1V increments detects a particular fixed voltage ranging from 2.0V Operating voltage range：1.5V~18V Detect voltage temperature characteristics： to 7.0V. The voltage detectors consist of a high precision and low power consumption standard TYP±0.9mV/℃ voltage source, a comparator, hysteresis circuit, and an output driver. NMOS technology ensures low power consumption. Selection Guide X Output configuration： NMOS Package： SOT-23-3，SOT-23-5，SOT-89-3 Typical Application Selection Guide BL8506B-XX XX Package Type： Battery checkers Level selectors Power failure detectors Microcomputer reset Battery backup of Memories Store non-volatile RAM signal protectors RM： SOT-23-3 RN： SOT-23-5 SM： SOT-89-3 （Default、Pb Free） Typical Application Circuit Output Type： N：Nch Open-drain Detector Voltage： 20……2.0V 30……3.0V …… 70……7.0V 60……6.0V http://www.belling.com.cn - 1- Total 6 Pages BL8506B Pin Configuration Pin Assignment SOT-23-3 2 1 3 Pin Number SOT-23-5 3 1 2 4 5 Pin Name SOT-89-3 3 1 2 GND VOUT VIN NC NC Functions Ground Output Voltage Input Voltage No Connection No Connection Product Classification Product Name BL8506B-XXNRM BL8506B-XXNRN BL8506B-XXNSM Detector Voltage XX V XX V XX V Output Type Nch Open-Drain Nch Open-Drain Nch Open-Drain Package SOT-23-3 SOT-23-5 SOT-89-3 Block Diagram http://www.belling.com.cn - 2- Total 6 Pages BL8506B Absolute Maximum Ratings PARAMETER SYMBAL RATINGS UNITS VIN Input Voltage VIN 18 V Output Current IOUT 50 mA VOUT GND-0.3~ VIN +0.3 V Output Voltage NMOS Continuous Total Power Dissipation SOT23-3/5 300 PD SOT89-3 mW 500 Operating Ambient Temperature TOpr 0~+70 ℃ Storage Temperature Tstg -50~+125 ℃ Soldering temperature and time Tsolder 260℃, 10s Electrical Characteristics (VDET =2.0V to 7.0V ,TA=25℃ ,unless otherwise noted) Parameter Symbol Conditions Min. Typ. Max. Units VDET Detect Voltage VDET×0.99 VDET VDET×1.01 V VHYS Hysteresis Width VDET×0.02 VDET×0.05 VDET×0.1 V Operating Current IIN Operating Voltage VIN Output Sink Current IOL ∆VDET/∆TA Temperature characteristics VDET=2.0V~ 2.8V VIN =3.0V - 1.8 3 VDET =2.8V~ 3.6V VIN =4.0V - 1.8 4 VDET =3.6V ~ 4.7V VIN =5.0V - 2.1 4 VDET =4.7V~ 7.0V VIN =8.0V - 2.5 4 VDET =2.0V to 7.0V 0.7 VDET=2.0V~ 2.8V VIN =-VDET(S) -0.2 V , VOUT=0.2V 0.5 VDET =2.8V~ 3.6V VIN =-VDET(S) -0.5 V , VOUT=0.3V 0.5 VDET =3.6V ~ 4.7V VIN =-VDET(S) -0.5 V , VOUT=0.3V 1.2 VDET =4.7V~ 7.0V VIN =-VDET(S) -0.5 V , VOUT=0.3V 2.5 0℃≤Topr≤70℃ - 18 ±0.9 mV/℃ 2、VDF ：Actual Detection Voltage value 3、Release Voltage：VDR=VDF+VHYS - 3- V mA Note: 1、VDF(S) ：Specified Detection Voltage value http://www.belling.com.cn μA Total 6 Pages BL8506B Functional Description The BL8506B series is a set of voltage detectors equipped with a high stability voltage reference which is connected to the negative input of a comparator — denoted as VREF in the following figure (Fig. 1).When the voltage drop to the positive input of the comparator (i,e,VB) is higher than VREF, VOUT goes high, M1 turns off, and VB is ex-pressed as VBH=VIN×(RB+RC)/(RA+RB+RC).If VIN is decreased so that VB falls to a value that is less than VREF, the comparator output inverts (from high to low), VOUT goes low, VC is high, M1 turns on, RC is bypassed, and VB becomes: VBL=VIN×RB/(RA+RB), which is less than VBH. By so doing the comparator out-put will stay low to prevent the circuit from oscillating when VB ≈ VREF. If VIN falls bellow the minimum operating voltage, the output becomes undefined. When VIN goes from low to VIN×RB/(RA+RB) >VREF, the comparator output goes high and VOUT goes high again. The detection voltage is as defined: VDET(–)=( RA+RB+RC)×VREF/( RB+RC) The release voltage is as defined: VDET(+)=(RA+RB)×VREF / RB The hysteresis width is: VHYS=VDET(+)–VDET(–) Fig.1 demonstrates the NMOS output type with positive output polarity (VOUT is normally high, active low). Fig.1 NMOS output voltage detector (BL8506B) http://www.belling.com.cn - 4- Total 6 Pages BL8506B Timing Chart Package Information ● SOT89-3 http://www.belling.com.cn - 5- Total 6 Pages BL8506B ● SOT23-3 ● SOT23-5 http://www.belling.com.cn - 6- Total 6 Pages