BL8518CB3TR293DC

BL8518 Low Voltage Detector With Built-in Delay Circuit DESCRIPTION FEATURES BL8518 is a series of high precision voltage detector with ultra-low current consumption (4.5uA typ. at Vin=3.0V) and a built-in delay circuit. It can work at very low voltage, which makes it perfect for system reset.      BL8518 is composed of high precision voltage reference, comparator, delay circuit, output driver and resistor array. Internally preset detect voltage has a low temperature drift and requires no external trimming.  High-Precision Detection Voltage: 3% Detection Voltage: 2.63V and 2.93V (customized other voltages) Built-in Power on Reset Delay time circuit: Refer to Selection Guide Operating Voltage Range: 1.2V~6V Ultra-low current consumption: 4.5uA typ. (at Vin=3.0V) Two Output Forms: CMOS (Active Low) and N-channel open-drain (Active Low) APPLICATIONS Two type of output, CMOS and N-channel opendrain are available.  BL8518 is available in small size SOT-23 package which is Pb free.     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 ELECTRICAL CHARACTERISTICS TYPICAL APPLICATION Detector threshold=2.93V 6 VDD BL8518 LC9018 Supply current(uA) VIN 5 VOUT VSS 4 3 2 -40℃ 1 25℃ 70℃ 0 0 www.belling.com.cn 1 1 2 3 4 Input Voltage(V) 5 6 BL8518 ORDERING INFORMATION PIN CONFIGURATION Product Classification BL8518 □ 1□ 2□ 3□ 4□ 5□ 6 Code Marking XXX: Detector Voltage XXXDC/ D:Delay time XXXDN D:200mS C:CMOS N:Nch Description Temperature&Rohs: C:-40~85C ,Pb Free Rohs Std. Package type: B3:SOT-23(A) B3B:SOT-23(B) Packing type: TR:Tape&Reel (Standard) Detector Voltage: e.g. 263=2.63V 293=2.93V Delay time: D:200mS Output forms: C:CMOS N:Nch □1 □2 □3 □4 □5 □6 BL8518CB3TR□□□ Product Classification BL8518CB3BTR□□□ Marking XXX: Detector Voltage XXXDC/ D:Delay time XXXDN D:200mS C:CMOS N:Nch Vss VDD Vout Ground Pin Supply Voltage Input Voltage detection output pin ABSOLUTE MAXIMUM RATING Parameter Value Input Voltage Output Voltage range Maximum Output current Ambient Temperature(Ta) Power Dissipation SOT-23 Storage Temperature(Ts) Lead Temperature & Time -0.3V-8V -0.3V- 8V 70mA -40C -85C 250mW -40C -150C 260C,10S Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. RECOMMENDED WORK CONDITIONS Item Input Voltage Range Ambient Temperature www.belling.com.cn Min Recommended Max. Unit 25 6 85 V C 1.2 -40 2 BL8518 ELECTRICAL CHARACTERISTICS BL8518CXXTR263DC/N(2.63V) (Topt＝25℃,Unless otherwise specified.) Symbol -VDET ISS VDDH VDDL Parameter Conditions Detector Threshold Current consumption Maximum operating voltage Minimum Operating voltage IOUT 2.551 0.5 2.0 mA Reference data Min. Typ. Max. Unit 1.0 2.63 4.5 2.709 10 10 Unit V uA V V VDD=4.63V Pch VDS=-2.1V，VDD=4.5V Output current Reference data Min. Typ. Max. BL8518CXXTR293DC/N(2.93V) (Topt＝25℃,Unless otherwise specified.) Symbol Parameter Conditions -VDET ISS VDDH VDDL Detector Threshold Current consumption Maximum operating voltage Minimum Operating voltage IOUT Output current 2.842 VDD=4.93V Pch VDS=-2.1V，VDD=4.5V 1.0 2.93 4.5 3.018 10 10 0.5 V uA V V 2.0 mA ELECTRICAL CHARACTERISTICS BY OUTPUT DELAY TIME Part Number Test Condition BL8518CXXTRXXXDC/N VDD=1.0V to Vdet+1.0V www.belling.com.cn 3 Output Delay Time Min. Typ. Max. Unit 140 ms 200 300 BL8518 BLOCK DIAGRAM VDD Vout _ Delay Time circuit + Vref Vss N Channel Open Drain VDD _ Vref Delay Time circuit + Vout Vss CMOS Output FUNCTION DESCRIPTION VDD Ra + _ Vref Delay Vout Rb Vss High precision low temperature co-efficiency reference voltage is applied to the negative input of a comparator. Input voltage, divided by resistor array of Ra and Rb, is applied to the positive input of the comparator. Output of the comparator passes a delay circuit and a series of buffer to drive the output CMOS pair. VDET =VREF*(1+Ra/Rb) www.belling.com.cn 4 BL8518 Ⅰ Ⅱ Ⅳ Ⅲ B Supply A Voltage VDD Ⅴ Detector Treshold(Vdet) Release Voltage Minimum Operating Voltage Vss Output Voltage (Vout) Tdelay Vss No. I II III IV V Operation status Output status VDD>Vdet VDD drops below Vdet VDD drops further below VDDL VDD rises above VDDL VDD rises above Vdet Output voltage is equal to the supply voltage Output voltage equals to GND level Output voltage is undefined Output voltage equals to GND level Output voltage equals to supply voltage after Tdelay TEST CIRCUITS (1) Supply current test circuit (2) Detector threshold test circuit VDD VIN BL8518 LC9018 BL8518 VOUT VOUT VSS (3) NCH Drive Output Current Test Circuit (4) PCH Drive Output Current Test Circuit VDS VDD VIN LC9018 BL8518 VSS www.belling.com.cn VDD VOUT IOUT VIN VDS LC9018 BL8518 VSS 5 VOUT IOUT VDD - VDS BL8518 TYPICAL PERFORMANCE CHARACTERISTICS 1) Supply current VS. Input voltage 2) Detector Threshold VS. Temperature Detector threshold=2.93V 3.1 5 3.0 Detector threshold(V) Supply current(uA) Detector threshold=2.93V 6 4 3 2 -40℃ 1 2.9 2.8 2.7 2.6 25℃ 70℃ 2.5 0 0 1 2 3 4 Input Voltage(V) 5 -40 -30 -20 -10 0 6 3) Nch Driver Output Current VS. VDS 4) NCH Driver Output Current vs. Input Voltage Detector threshold=2.93V Detector threshold=2.93V 20 25 -40℃ 25℃ 70℃ 18 20 Output Current(mA) Output Current(mA) 16 14 12 10 8 6 4 15 10 5 VDD=2V VDD=1V 2 0 0.0 0.5 1.0 1.5 VDS(V) 2.0 2.5 0 3.0 0 5) PCH Driver Output Current vs. Input Current Detector threshold=2.93V 40 Vds=0.5V Vds=1.0V Vds=1.5V Vds=2.0V 35 30 Output Current(mA) 10 20 30 40 50 60 70 80 90 Temperature(℃) 25 20 15 10 5 0 0 1 2 3 4 5 Input Voltage Vin(V) www.belling.com.cn 6 7 6 1 2 Input Voltage Vin(V) 3 4 BL8518 PACKAGE LINE Package SOT-23 Devices per reel Package dimension： www.belling.com.cn 7 3000Pcs Unit mm