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LTC2938IDE Datasheet(PDF) 3 Page - Linear Technology |
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LTC2938IDE Datasheet(HTML) 3 Page - Linear Technology |
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3 / 20 page  LTC2938/LTC2939 3 293839ff ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Minimum Internal Operating Voltage RST in Correct Logic State l 1V VCCMINP Minimum Required for Configuration VCC Rising l 2.6 V VRT50 5V, 5% Reset Threshold V1 Input Threshold l 4.600 4.675 4.750 V VRT33 3.3V, 5% Reset Threshold V1, V2 Input Threshold l 3.036 3.086 3.135 V VRT25 2.5V, 5% Reset Threshold V2, V3 Input Threshold l 2.300 2.338 2.375 V VRT18 1.8V, 5% Reset Threshold V2, V3, V4 Input Threshold l 1.656 1.683 1.710 V VRT15 1.5V, 5% Reset Threshold V2, V3, V4 Input Threshold l 1.380 1.403 1.425 V VRT12 1.2V, 5% Reset Threshold V2, V3, V4 Input Threshold l 1.104 1.122 1.140 V VRTA ADJ Reset Threshold V3, V4, V5, V6 Input Threshold l 492.5 500 507.5 mV VRTAN –ADJ Reset Threshold V4 Input Threshold l –18 0 18 mV VREF Reference Voltage VCC > 2.3V, IVREF = ±1mA, CREF < 1000pF l 1.192 1.210 1.228 V VPG Configuration Voltage Range VCC > VCCMINP l 0VREF V IVPG VPG Input Current VPG = VREF l ±20 nA IV1 V1 Input Current V1 = 5V, IVREF = 12μA, (Note 4) l 80 125 μA IV2 V2 Input Current V2 = 3.3V l 0.8 2 μA IV3 V3 Input Current V3 = 2.5V V3 = 0.55V (ADJ Mode) l l 0.52 1.2 ±15 μA nA IV4 V4 Input Current V4 = 1.8V V4 = 0.55V (ADJ Mode) V4 = -0.02V (–ADJ Mode) l l l 0.34 0.8 ±15 ±15 μA nA nA IV5, IV6 V5, V6 Input Current (LTC2939) V5, V6 = 0.55V l ±15 nA ICRT(UP) CRT Pull-Up Current VCRT = GND l –1.4 –2 –2.6 μA ICRT(DN) CRT Pull-Down Current VCRT = 1.3V l 10 20 30 μA tRST Reset Timeout Period CRT = 1500pF l 234 ms tUV Vn Undervoltage Detect to RST Vn Less Than Reset Threshold VRTX by More Than 1% 150 μs VOL Voltage Output Low RST ISINK = 2.5mA; VCC = 3V l 0.15 0.4 V ISINK = 100μA; VCC = 1V l 0.05 0.3 V VOL Voltage Output Low WDO ISINK = 2.5mA; VCC = 3.3V l 0.15 0.4 V VOH Voltage Output High RST, WDO (Note 5) ISOURCE = –1μA; V2 = 3.3V l V2 – 1 V ICWT(UP) CWT Pull-Up Current VCWT = GND l –1.4 –2 –2.6 μA ICWT(DN) CWT Pull-Down Current VCWT = 1.3V l 10 20 30 μA tWD Watchdog Timeout Period CWT = 1500pF l 20 30 40 ms VWDI WDI Input Threshold (VCC = 3.3V to 5.5V) Logic Low Open Logic High l l l 0.7 1.4 0.9 0.4 1.1 V V V The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VCC = 5V unless otherwise specified. (Note 3) |
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