CAT8801 200 nA Microprocessor Power Supply Supervisors Description The CAT8801 is a supervisory circuit that monitors power supplies in digital systems and provides a reset signal whenever the system’s input voltage is below a prescribed minimum level. The CAT8801 replaces popular voltage supervisors such as MAX809 in applications where operating current is a primary consideration. CAT8801 generates a reset signal, which is asserted while the power supply voltage is below a preset threshold level and remains asserted for at least 140 ms after the power supply level has risen above that level. Nine industry standard threshold levels are offered to support +5.0 V, +3.3 V, +3.0 V, +2.5 V and +1.8 V systems. ON Semiconductor’s floating gate technology, used in programming the trigger thresholds, makes it possible to quickly offer any custom reset threshold value should the 9 standard voltage thresholds not meet a system’s needs. The CAT8801 features a Push−Pull CMOS RESET output (active LOW) and is fully specified over the industrial temperature range of −40°C to 85°C. CAT8801 is available in compact 3−pin SOT23 and SC−70 packages. • Precision Voltage Monitoring of +1.8 V, +2.5 V, +3.0 V, +3.3 V and +5.0 V Power Supplies Ultra Low 200 nA Supply Current ±1.2% Voltage Threshold Accuracy 270 ms Power−On Reset Timeout Reset Signal Valid Down to VCC = 1 V No External Components Necessary High Immunity to Power−Supply Transients Industrial Temperature Range: −40°C to +85°C Available in RoHS−compliant SOT−23 and SC−70 Packages Applications • • • • • • • • Computers Servers Laptops Cable Modems Wireless Communications Embedded Control Systems Power Meters PDAs and Handheld Equipment © Semiconductor Components Industries, LLC, 2010 May, 2010 − Rev. 4 SOT−23 TB SUFFIX CASE 527AG SC−70 SD SUFFIX CASE 419AB PIN CONNECTIONS 1 GND CAT8801 3 VCC 2 Features • • • • • • • • http://onsemi.com RESET 3−Lead SOT−23 3−Lead SC−70 (Top View) THRESHOLD SUFFIX SELECTOR Threshold Suffix Nominal Threshold L 4.625 M 4.380 T 3.075 S 2.925 R 2.630 Z 2.320 Y 2.190 W 1.670 V 1.580 ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. 1 Publication Order Number: CAT8801/D CAT8801 Table 1. PIN DESCRIPTION Pin # Name 1 GND 2 RESET 3 VCC Description Ground Active LOW reset. RESET is asserted if VCC falls below the reset threshold and remains low for at least 140 ms after VCC rises above the reset threshold. Power supply voltage that is monitored. Block Diagram VCC VCC VCC TOLERANCE BIAS + DIGITAL DELAY – RESET VOLTAGE REFERENCE CAT8801 GND Table 2. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units −0.3 to +6.0 V 20 mA Output Current, RESET 20 mA Rate of Rise, VCC 100 V/ms Any pin with respect to ground Input Current, VCC Continuous Power Dissipation mW Derate 2.2 mW/°C above 70°C (SC−70) 175 Derate 4 mW/°C above 70°C (SOT−23) 320 Operating Temperature Range −40 to +85 °C Storage Temperature Range −65 to +150 °C 300 °C Lead Soldering Temperature (10 seconds) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. http://onsemi.com 2 CAT8801 Table 3. ELECTRICAL CHARACTERISTICS (Note 1) (VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C.) Parameter Symbol VCC Range ICC VTH Test Conditions Min TA = 0°C to +70°C TA = −40°C to +85°C Supply Current Reset Threshold Voltage (Note 2) L M T S R Z Y W V VTH_HYS Typ Max Units 1.0 5.5 V 1.2 5.5 VTH < VCC < 5.5 V 200 400 VTH < VCC < 3.6 V 175 350 4.625 4.681 TA = +25°C 4.570 TA = −40°C to +85°C 4.500 TA = +25°C 4.327 TA = −40°C to +85°C 4.262 TA = +25°C 3.038 TA = −40°C to +85°C 3.000 TA = +25°C 2.890 TA = −40°C to +85°C 2.850 TA = +25°C 2.598 TA = −40°C to +85°C 2.559 TA = +25°C 2.292 TA = −40°C to +85°C 2.257 TA = +25°C 2.164 TA = −40°C to +85°C 2.131 TA = +25°C 1.650 TA = −40°C to +85°C 1.625 TA = +25°C 1.561 TA = −40°C to +85°C 1.537 Threshold Hysteresis 4.380 4.433 4.498 3.075 3.112 3.150 2.925 2.960 3.000 2.630 2.662 2.701 2.320 2.348 2.383 2.190 2.216 2.249 1.670 1.690 1.715 1.580 1.599 1.623 2 VCC = VTH to (VTH – 100 mV) Reset Active Timeout Period TA = −40°C to +85°C VOL RESET Output Voltage Low ISINK = 2 mA VOH RESET Output Voltage High ISOURCE = 0.5 mA 1. Production testing done at TA = +25°C; limits over temperature guaranteed by design. 2. Measured on falling edge of VCC. http://onsemi.com 3 140 0.8 x VCC V 4.750 Reset Threshold Temperature Coefficient VCC to Reset Delay nA % 0.1 mV/°C 20 50 ms 270 460 ms 0.4 V V CAT8801 TYPICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C.) 350 220 VCC = 5.5 V VCC = 5.5 V 200 180 ISB (nA) tRST (ms) 300 250 VCC = 1.8 V 160 140 VCC = 1.8 V 120 200 −50 −25 0 25 50 75 100 −50 100 0 25 50 75 TEMPERATURE (°C) TEMPERATURE (°C) Figure 1. Power−Up Reset Timeout Figure 2. Supply Current vs. Temperature 100 1.003 NORMALIZED THRESHOLD 5.0 POWER−DOWN RESET DELAY (ms) −25 4.5 4.0 3.5 3.0 2.5 −50 −25 0 25 50 75 1.002 1.001 1.000 0.999 0.998 0.997 0.996 −50 100 −25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) Figure 3. Power−Down Reset Delay vs. Temperature Figure 4. Normalized Reset Threshold vs. Temperature 150 Description Reset Timing The reset signal is asserted LOW for the CAT8801 when the power supply voltage falls below the threshold trip voltage and remains asserted for at least 140 ms after the power supply voltage has risen above the threshold. Power Supply Voltage RESET Threshold Voltage 5V 0V Reset Timeout Period 140ms minimum 5V 0V Figure 5. Reset Timing Diagram http://onsemi.com 4 CAT8801 PACKAGE DIMENSIONS SC−70, 3 Lead, 1.25x2 CASE 419AB−01 ISSUE O D SYMBOL MIN A 0.80 E1 E A1 0.00 A2 0.80 b 0.15 0.10 0.90 1.00 0.30 0.08 1.80 2.00 2.20 E 1.80 2.10 2.40 E1 1.15 1.25 1.35 0.22 0.65 BSC 0.26 L1 0.36 0.46 0.42 REF 0.15 BSC L2 TOP VIEW 1.10 c L e MAX D e e NOM θ 0º 8º θ1 4º 10º q1 A2 A q q1 b L L1 A1 SIDE VIEW c END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-203. http://onsemi.com 5 L2 CAT8801 PACKAGE DIMENSIONS SOT−23, 3 Lead CASE 527AG−01 ISSUE O D SYMBOL MIN A 0.89 1.12 A1 0.013 0.10 b 0.37 0.50 c 0.085 0.18 D 2.80 3.04 E 2.10 2.64 E1 1.20 1.40 3 E1 1 E 2 e MAX e 0.95 BSC e1 1.90 BSC L 0.40 REF e1 L1 TOP VIEW θ A NOM 0.54 REF 0º 8º q b L1 A1 SIDE VIEW L END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC TO-236. http://onsemi.com 6 c CAT8801 Example of Ordering Information (Note 3) Prefix Device # Suffix CAT 8801 L Company ID (Optional) Product Number 8801 Trip Level L: 4.625 V M: 4.380 V T: 3.075 V S: 2.925 V R: 2.630 V Z: 2.320 V Y: 2.190 V W: 1.670 V V: 1.580 V TB −G T10 Package Lead Finish G: NiPdAu Tape & Reel (Note 6) T: Tape & Reel 3: 3,000 / Reel TB: SOT−23 Green SD: SC70 Green ORDERING INFORMATION 3. 4. 5. 6. Parts and Threshold Voltage SOT−23 Green NiPdAu Lead Finish (Note 5) SC−70 Green NiPdAu Lead Finish CAT8801L 4.625 CAT8801LTB−GT3 CAT8801LSD−GT3 CAT8801M 4.380 CAT8801MTB−GT3 CAT8801MSD−GT3 CAT8801T 3.075 CAT8801TTB−GT3 CAT8801TSD−GT3 CAT8801S 2.925 CAT8801STB−GT3 CAT8801SSD−GT3 CAT8801R 2.630 CAT8801RTB−GT3 CAT8801RSD−GT3 CAT8801Z 2.320 CAT8801ZTB−GT3 CAT8801ZSD−GT3 CAT8801Y 2.190 CAT8801YTB−GT3 CAT8801YSD−GT3 CAT8801W 1.670 CAT8801WTB−GT3 CAT8801WSD−GT3 CAT8801V 1.580 CAT8801VTB−GT3 CAT8801VSD−GT3 All packages are RoHS−compliant (Lead−free, Halogen−free). The device used in the above example is a CAT8801LTB−GT3 (4.625 V, SOT−23, NiPdAu, Tape & Reel, 3,000/Reel). For availability of the various voltage, package and temperature options, please contact your nearest ON Semiconductor sales office. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 7 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative CAT8801/D