Micropower Undervoltage Sensing Circuits

www.DataSheet4U.com MC33465 Micropower Undervoltage Sensing Circuits with Programmable Output Delay The MC33465 series are micropower undervoltage sensing circuits that are specifically designed for use with battery powered microprocessor based systems, where extended battery life is required. A choice of several threshold voltages from 0.9 V to 4.5 V are available. This device features a very low quiescent bias current of 1.0 µA typical. The MC33465 series features a highly accurate voltage reference, a comparator with precise thresholds and built–in hysteresis to prevent erratic reset operation, a choice of output configurations between open drain or complementary, a time delayed output, which can be programmed by the system designer, and guaranteed operation below 1.0 V with extremely low standby current. This device is available in a SOT–23 5–pin surface mount package. Applications include direct monitoring of the MPU/logic power supply used in appliance, automotive, industrial and portable equipment. Features: http://onsemi.com 5 1 SOT–23–5 N SUFFIX CASE 1212 PIN CONNECTIONS Reset Input 1 2 4 N/C (Top View) 5 CD • • • • • • Extremely Low Standby Current of 1.0 µA at Vin = 3.5 V Wide Input Voltage Range (0.7 V to 10 V) Monitors Power Supply Voltages from 1.1 V to 5.0 V High Accuracy Detector Threshold (±2.5%) Two Reset Output Types (Open Drain or Complementary Drive) Programmable Output Delay by External Capacitor (100 ms typ. with 0.15 µF) • Surface Mount Package (SOT–23 5–Pin) • Convenient Tape and Reel (3000 per Reel) Ground 3 ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. Representative Block Diagrams MC33465N–YYATR Open Drain Output Configuration 2 Input 1 Reset 2 MC33465N–YYCTR Complementary Output Configuration Input RD RD 1 Reset Vref Vref 3 Gnd 5 CD YY Denotes Threshold Voltage 3 Gnd 5 CD This device contains 28 active transistors. © Semiconductor Components Industries, LLC, 1999 1 October, 1999 – Rev. 3 Publication Order Number: MC33465/D MC33465 MAXIMUM RATINGS ÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁ Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ Power Input Supply Voltage Reset Output Voltage Vin 0 to 12 V V VO IO –0.3 to 12 70 Reset Output Current (Source or Sink) mA Power Dissipation and Thermal Characteristics Maximum Power Dissipation at TA = 25°C Case 1212 (SOT–23) N Suffix Thermal Resistance, Junction–to–Ambient Operating Junction Temperature Operating Ambient Temperature Storage Temperature Range PD 150 667 mW RθJA TJ TA °C/W °C °C °C +125 –40 to +85 Tstg –40 to +125 260°C, 10 s Lead Temperature (Soldering) Tsolder Rating Symbol Value Unit http://onsemi.com 2 MC33465 ELECTRICAL CHARACTERISTICS (For all values TA = 25°C (Note 1), unless otherwise noted.) Characteristic SENSE COMPARATOR Symbol Min Typ Max Unit ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á Threshold Voltage High to Low State Output (Vin Decreasing) 09 Suffix 20 Suffix 22 Suffix 27 Suffix 28 Suffix 30 Suffix 32 Suffix 34 Suffix 38 Suffix 43 Suffix 44 Suffix 45 Suffix 46 Suffix 47 Suffix Threshold Hysteresis (Vin Increasing) 09 Suffix 20 Suffix 22 Suffix 27 Suffix 28 Suffix 30 Suffix 32 Suffix 34 Suffix 38 Suffix 43 Suffix 44 Suffix 45 Suffix 46 Suffix 47 Suffix V VIL 0.878 1.950 2.145 2.633 2.730 2.925 3.120 3.315 3.705 4.193 4.290 4.387 4.485 4.583 0.027 0.060 0.066 0.081 0.084 0.090 0.096 0.102 0.114 0.129 0.132 0.135 0.138 0.141 – 0.9 2.0 2.2 2.7 2.8 3.0 3.2 3.4 3.8 4.3 4.4 4.5 4.6 4.7 0.922 2.050 2.255 2.767 2.870 3.075 3.280 3.485 3.895 4.407 4.510 4.612 4.715 4.817 0.063 0.140 0.154 0.189 0.196 0.210 0.224 0.238 0.266 0.301 0.308 0.315 0.322 0.329 – VH 0.045 0.100 0.110 0.135 0.140 0.150 0.160 0.170 0.190 0.215 0.220 0.225 0.230 0.235 ±100 V ÁÁÁ Á Á Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ Á Á Á Á ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁ Á Á Á Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ Á Threshold Voltage Temperature Coefficient TC PPM/°C RESET OUTPUT Output Voltage High State (Complementary Output: Isource = 1.0 mA) Low State (Complementary or Open Drain Output: Isink = 1.0 mA) Output Sink Current (Vin = 1.5 V, VOL = 0.5 V) V VOH VOL IOL Vin – 2.1 – 1.0 1.0 Vin – 1.0 0.25 2.0 2.0 Vin 0.5 – – mA mA Output Source Current (Vin = 4.5 V, VOH = 2.4 V) IOH DELAY OUTPUT Output Sink Current (Vin = 1.5 V, VOL = 0.5 V) Delay Resistance IOL RD 0.2 0.5 0.8 1.0 – mA 2.0 MΩ TOTAL DEVICE Operating Input Voltage Range Quiescent Input Current Vin = 4.34 V Vin = 6.50 V Vin Iin 0.8 to 10 – – – – V µA 5.5 1.3 11 3.9 NOTE: 1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. http://onsemi.com 3 MC33465 Figure 1. Reset Low State Sink Current versus Output Voltage 16 I O , OUTPUT SINK CURRENT (mA) 14 12 10 8.0 2.0 V 6.0 4.0 2.0 0 0 0.5 1.0 1.5 V Vin = 2.5 V MC33465N–45ATR TA = 20°C VO , OUTPUT VOLTAGE (V) 7.0 6.0 5.0 30°C 4.0 3.0 2.0 1.0 0 1.5 2.0 2.5 3.0 0 1.0 2.0 3.0 4.0 5.0 6.0 VOL, LOW STATE OUTPUT VOLTAGE (V) Vin, INPUT VOLTAGE (V) TA = –30°C TA = 25°C TA = 80°C 80°C, 20°C Figure 2. Output Voltage versus Input Voltage MC33465N–45ATR 470 kΩ Pull–up Figure 3. Input Current versus Input Voltage 8.0 7.0 I in , SUPPLY CURRENT ( µ A) 6.0 5.0 4.0 3.0 2.0 1.0 0 0 2.0 TA = –30°C –30°C 4.0 6.0 8.0 10 Vin, INPUT VOLTAGE (V) 80°C 25°C TA = 25°C MC33465N–45ATR TA = 80°C V in , INPUT THRESHOLD VOLTAGE (V) 3.0 2.9 2.85 2.8 Figure 4. Comparator Input Threshold Voltage versus Temperature VIL + VH VH 2.75 2.7 2.65 2.6 –40 MC33465N–27ATR –20 0 20 40 60 80 TA, AMBIENT TEMPERATURE (°C) VIL Figure 5. Reset Output Sink Current versus Input Voltage 12 I O, OUTPUT SINK CURRENT (mA) 10 8.0 80°C 6.0 4.0 2.0 0 MC33465N–27ATR VOL = 0.5 V 4.0 TA = –30°C 25°C IO , OUTPUT CURRENT (mA) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0 Figure 6. Reset Output Source Current versus Input Voltage MC33465N–27CTR Vin – VO = 2.1 V Vin – VO = 1.5 V Vin – VO = 1.0 V Vin – VO = 0.5 V 2.0 4.0 6.0 8.0 10 12 Vin, INPUT VOLTAGE (V) Vin, INPUT VOLTAGE (V) http://onsemi.com 4 MC33465 12 Figure 7. CD Sink Current versus Input Voltage TA = –30°C I sink , SINK CURRENT (mA) 25°C 16 14 12 10 8.0 6.0 4.0 2.0 Figure 8. CD Sink Current versus CD Voltage MC33465N–27ATR 10 VOL = 0.5 V CD , SINK CURRENT (mA) 8.0 Vin = 2.5 V 80°C 6.0 4.0 2.0 0 Vin = 2.0 V Vin = 1.5 V 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 Vin, INPUT VOLTAGE (V) VCD, VOLTAGE (V) 1.8 R D, DELAY RESISTANCE (M Ω) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 –40 –20 0 20 40 60 80 Vth(D), DETECTOR THRESHOLD VOLTAGE (V) Figure 9. Delay Resistance versus Temperature Figure 10. Detector Threshold versus Temperature 1.9 1.8 1.7 1.6 Vin = 2.97 V 1.5 1.4 1.3 MC33465N–27ATR 1.2 –40 –20 0 20 40 60 80 TA, AMBIENT TEMPERATURE (°C) TA, AMBIENT TEMPERATURE (°C) Figure 11. Output Delay Time versus Delay Capacitance 1000 t p, OUTPUT DELAY TIME (ms) 100 tD: Output Switch Low to High 10 1.0 0.1 0.01 0.0001 tPHL: Output Switch High to Low 0.001 0.01 0.1 1 CD, DELAY CAPACITANCE (µF) http://onsemi.com 5 MC33465 Figure 12. Typical Open Drain Application VDD 2 5 CD CD Input 1 Reset R VDD Reset Gnd CPU MC33465 Series 3 Gnd Figure 13. Typical Complementary Output Application VDD 2 5 CD CD Input 1 Reset VDD Reset Gnd CPU MC33465 Series 3 Gnd APPLICATION CIRCUIT INFORMATION The MC33465 series are micropower undervoltage sensing circuits which offer a programmable time delayed output with the choice of either complementary output drive or open drain output configurations. Figure 14 shows the timing relationships between the input voltage and the resulting circuit waveforms. When the input voltage (Vin) exceeds the sense comparator thre