AZ7025Z

Preliminary Datasheet VOLTAGE DETECTOR General Description The AZ70XX series ICs are under voltage detectors with a built in voltage threshold and low power consumption. The AZ70XX are specifically designed to accurately monitor power supplies. The AZ70XX use a precision on-chip voltage reference and a comparator to measure the input operating voltage. These ICs can accurately reset the system after detecting voltage at the time of switching power on and instantaneous power off in various CPU systems and other logic systems. The detect voltage thresholds are 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor AZ7023/25/27/29/31/33/42/45 respectively. Built in hysteresis helps to prevent erratic operation in the presence of noise. The AZ70XX series are available in 2 standard packages: TO-92 (bulk or ammo packing) and SOT-89-3. AZ70XX Features · Low Current Consumption: ICCL=300µA Typical ICCH=30µA Typical Low Minimum Operating Voltage for Output Resetting: 0.8V Typical Built in Hysteresis Voltage: 50mV Typical Open Collector Output Extended Temperature Range: -40 to 85oC · · · · Applications · · · · · Low Battery Voltage Detector Power Fail Indicator Processor Reset Generator Battery Backup Control Home Electric Appliances TO-92 TO-92 Ammo Packing SOT-89-3 Figure 1. Package Types of AZ70XX Mar. 2007 Rev. 1. 5 1 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Pin Configuration Z Package (TO-92) Z Package (TO-92 Ammo Packing) R Package (SOT-89-3) AZ70XX 3 2 1 OUT GND VCC 3 2 1 OUT GND VCC VCC GND OUT 1 2 3 Figure 2. Pin Configuration of AZ70XX (Top View) Functional Block Diagram VCC OUT + - GND Figure 3. Functional Block Diagram of AZ70XX Mar. 2007 Rev. 1. 5 2 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Ordering Information AZ70 Circuit Type Detect Voltage 23: 2.3V 31: 3.1V 25: 2.5V 33: 3.3V 27: 2.7V 42: 4.2V 29: 2.9V 45: 4.5V Part Number Tin Lead AZ7023Z AZ7023ZTR AZ7025Z AZ7025ZTR AZ7027Z AZ7027ZTR AZ7029Z AZ7029ZTR AZ7031Z AZ7031ZTR AZ7033Z AZ7033ZTR AZ7042Z AZ7042ZTR AZ7045Z AZ7045ZTR AZ7023RTR AZ7025RTR AZ7027RTR AZ7029RTR AZ7031RTR AZ7033RTR AZ7042RTR AZ7045RTR Lead Free AZ7023Z-E1 AZ7023ZTR-E1 AZ7025Z-E1 AZ7025ZTR-E1 AZ7027Z-E1 AZ7027ZTR-E1 AZ7029Z-E1 AZ7029ZTR-E1 AZ7031Z-E1 AZ7031ZTR-E1 AZ7033Z-E1 AZ7033ZTR-E1 AZ7042Z-E1 AZ7042ZTR-E1 AZ7045Z-E1 AZ7045ZTR-E1 AZ7023RTR-E1 AZ7025RTR-E1 AZ7027RTR-E1 AZ7029RTR-E1 AZ7031RTR-E1 AZ7033RTR-E1 AZ7042RTR-E1 AZ7045RTR-E1 AZ70XX E1: Lead Free Blank: Tin Lead TR: Tape and Reel or Ammo Blank: Bulk Package Z: TO-92 R: SOT-89-3 Marking ID Tin Lead AZ7023Z AZ7023Z AZ7025Z AZ7025Z AZ7027Z AZ7027Z AZ7029Z AZ7029Z AZ7031Z AZ7031Z AZ7033Z AZ7033Z AZ7042Z AZ7042Z AZ7045Z AZ7045Z 7023R 7025R 7027R 7029R 7031R 7033R 7042R 7045R Lead Free AZ7023Z-E1 AZ7023Z-E1 AZ7025Z-E1 AZ7025Z-E1 AZ7027Z-E1 AZ7027Z-E1 AZ7029Z-E1 AZ7029Z-E1 AZ7031Z-E1 AZ7031Z-E1 AZ7033Z-E1 AZ7033Z-E1 AZ7042Z-E1 AZ7042Z-E1 AZ7045Z-E1 AZ7045Z-E1 E723 E725 E727 E729 E731 E733 E742 E745 Package Temperature Range Detect Voltage 2.3V Packing Type Bulk Ammo Bulk Ammo Bulk Ammo Bulk Ammo Bulk Ammo Bulk Ammo Bulk Ammo Bulk Ammo Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel Tape & Reel 2.5V 2.7V 2.9V TO-92 -40 to 85oC 3.1V 3.3V 4.2V 4.5V 2.3V 2.5V 2.7V SOT-89-3 -40 to 85oC 2.9V 3.1V 3.3V 4.2V 4.5V BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Mar. 2007 Rev. 1. 5 3 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Absolute Maximum Ratings (Note 1) Parameter Supply Voltage Power Dissipation (Package Limitations, TA=25oC) Operating Junction Temperature Storage Temperature Range Symbol VCC PD SOT-89-3 Package: 500 TJ TSTG 150 -65 to 150 o AZ70XX Value -0.3 to 20 TO-92 Package: 400 Unit V mW C oC Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under"Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Supply Voltage Operating Temperature Range Symbol VCC TA -40 Min Max 18 85 Unit V oC Mar. 2007 Rev. 1. 5 4 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Electrical Characteristics TA=25oC, unless otherwise specified. Parameter Symbol Conditions AZ7023R/Z AZ7025R/Z RL=200Ω (Note 2) VOL ≤ 0.4V AZ7027R/Z AZ7029R/Z AZ7031R/Z AZ7033R/Z AZ7042R/Z AZ7045R/Z Low-level Output Voltage Output Leakage Current Hysteresis Voltage Detect Voltage Temperature Coefficient Circuit Current at On Time Circuit Current at Off Time Minimum Operating Voltage VOL IOH VHYS ∆VDET/(VDET × ∆T) ICCL ICCH VOPR VCC=VDET(min)-0.05V RL=200Ω (Note 2) VCC=15V RL=200Ω (Note 2) RL=200Ω (Note 2) VCC=VDET(min)-0.05V VCC=5.25V RL=200Ω (Note 2) VOL ≤ 0.4V VCC changed from 5.25V to VDET(min)-0.05V, RL=1.0KΩ, CL=100p (Note 3) VCC changed from VDET(min)0.05V to 5.25V, RL=1.0KΩ, CL=100p (Note 3) VCC=VDET(min)-0.05V TA=25oC (Note 4) VCC=VDET(min)-0.05V TA=-40 to 85 oC (Note 4) 20 mA IOL Ⅱ 16 30 50 ±0.01 300 30 0.8 500 50 Min 2.15 2.35 2.55 2.75 2.95 3.15 4.05 4.35 Typ 2.3 2.5 2.7 2.9 3.1 3.3 4.2 4.5 Max 2.45 2.65 2.85 3.05 3.25 3.45 4.35 4.65 0.4 0.1 100 V µA mV % / oC µA µA V V Unit AZ70XX Detect Voltage VDET “L”Transmission Delay Time tpHL 10 µs “H”Transmission Delay Time tpLH 15 µs IOL Ⅰ Output Current at On Time Note 2: See test circuit 1 and Figure 12. Note 3: See test circuit 2 and Figure 12. Note 4: See test circuit 3. Adjusting the regulative power source until the reading value of voltage meter V is 0.4V, the reading value of current meter A is defined as "Output Current at On Time". Mar. 2007 Rev. 1. 5 5 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Electrical Characteristics (Continued) AZ70XX A1 A2 1 VCC V1 AZ7029 GND 2 OUT 3 + 10µF RL V2 Figure 4. Test Circuit 1 1 VCC Input Pulse RL 3 10µF + +5V AZ7029 GND 2 OUT CL Figure 5. Test Circuit 2 1 VDET(min)-0.05V + V CC 10µ F AZ7029 GND 2 OUT 3 A V Figure 6. Test Circuit 3 Mar. 2007 Rev. 1. 5 6 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Typical Performance Characteristics AZ70XX 2.95 1200 1100 Minimum Operating Voltage (mV) AZ7029 2.90 1000 900 800 700 600 500 400 -40 Detect Voltage (V) VDET+ (VCC Rising) 2.85 AZ7029 VDET- (VCC Falling) 2.80 2.75 -40 -20 0 20 O 40 60 80 -20 0 20 O 40 60 80 Temperature ( C) Temperature ( C) Figure 7. Detect Voltage vs. Temperature Figure 8. Minimum Operating Voltage vs. Temperature 70 100 Output Current at On Time (mA) 60 Low-level Output Voltage (mV) 75 50 AZ7029 50 40 AZ7029 30 25 20 10 -40 -20 0 20 O 40 60 80 0 -40 -20 0 20 40 O 60 80 Temperature ( C) Temperature ( C) Figure 9. Output Current at On Time vs. Temperature Figure 10. Low-level Output Voltage vs. Temperature Mar. 2007 Rev. 1. 5 7 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Typical Performance Characteristics (Continued) AZ70XX Time (s) Figure 11. Output Voltage Dynamic Response when VCC Increases and Decreases Operating Diagram VCC VDET+ VDETVOPR GND VOUT tpHL tpLH tpHL tpLH VHYS Figure 12. AZ70XX Timing Waveform (Note 5) Note 5: Detect voltage: VDETHysteresis voltage (VHYS): VDET+-VDET- Release voltage: VDET+ Minimum operating voltage: VOPR Mar. 2007 Rev. 1. 5 8 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VOLTAGE DETECTOR Operating Diagram (Continued) Figure 12 is a typical timing waveform for AZ70XX. In normal steady-state operation when VCC>VDET-, the output will be in a logic high state and VOUT is dependent upon the voltage that the pull-up resistor connected to. Here is some explanations for AZ70XX's operation. 1. When the input voltage VCC falls below VDET-, the output will pull down to logic low after a delay time of tpHL. In general, at rated output current and VCC, VOUT can be pulled down to a voltage as low as within 0.4V from GND. (See the Electrical Characteristics section). The voltage level VDET- means the detect voltage. 2. The output, VOUT, will stay valid until VCC falls below the minimum operating voltage, VOPR (0.8V typical). Below minimum operating voltage, the output is undefined. 3. During power-up, VOUT will remain undefined until VCC rises above VOPR, at which time the output will become valid. VOUT will be in its active low state while VOPR