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LTC2931 Datasheet(PDF) 3 Page - Linear Technology |
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LTC2931 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page LTC2931 3 2931fb SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VREF Reference Voltage VCC ≥ 2.3V, IVREF = ±1mA, CREF ≤ 1000pF ● 1.192 1.210 1.228 V VPG Mode Selection Voltage Range VCC ≥ VCCMINP ● 0VREF V IVPG VPG Input Current VPG = VREF ● ±20 nA IV1 V1 Input Current V1 = 5V, IVREF = 12μA (Note 4) ● 52 75 μA IV2 V2 Input Current V2 = 3.3V ● 0.8 2 μA IV3 V3 Input Current V3 = 2.5V V3 = 0.55V (ADJ Mode) ● ● –15 0.52 1.2 15 μA nA IV4 V4 Input Current V4 = 1.8V V4 = 0.55V (ADJ Mode) V4 = –0.02V (–ADJ Mode) ● ● ● –15 –15 0.34 0.8 15 15 μA nA nA IV5, IV6 V5, V6 Input Current V5, V6 = 0.55V ● –15 15 nA ICRT(UP) CRT Pull-Up Current VCRT = GND ● –1.4 –2 –2.6 μA ICRT(DN) CRT Pull-Down Current VCRT = 1.3V ● 10 20 30 μA tRST Reset Timeout Period CRT = 1500pF ● 234 ms tUV Vn Undervoltage Detect to RST or COMPn Vn Less Than Reset Threshold by More than 1% 150 μs VOL Voltage Output Low RST, COMPn ISINK = 3mA, VCC = 3V ISINK = 100μA, VCC = 1V ● ● 0.15 0.05 0.4 0.3 V V ICOMPn COMPn Pull-Up Current VCOMPn = GND ● –2 –6 –12 μA VOL Voltage Output Low WDO ISINK = 3mA ● 0.15 0.4 V VOH Voltage Output High RST, WDO, COMPn (Note 5) ISOURCE = –1μA ● V2-1 V ICWT(UP) CWT Pull-Up Current VCWT = GND ● –1.4 –2 –2.6 μA ICWT(DN) CWT Pull-Down Current VCWT = 1.3V ● 10 20 30 μA tWD Watchdog Timeout Period CWT = 1500pF ● 20 30 40 ms VIH WDI Input Threshold High VCC = 3.3V to 5.5V ● 1.6 V VIL WDI Input Threshold Low VCC = 3.3V to 5.5V ● 0.4 V tWP WDI Input Pulse Width VCC = 3.3V ● 150 ns IWDI WDI Pull-Up Current VWDI = 1V ● –4 –10 –16 μA Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All currents into pins are positive, all voltages are referenced to GND unless otherwise noted. Note 3: The greater of V1, V2 is the internal supply voltage (VCC). Note 4: Under static no-fault conditions, V1 will necessarily supply quiescent current. If at any time V2 is larger than V1, V2 must be capable of supplying the quiescent current, programming (transient) current and reference load current. Note 5: The output pins RST, WDO, and COMPn have diode protected internal pull-ups to V2 of typically 6μA. However, external pull-up resistors may be used when faster rise times are required or for VOH voltages greater than V2. ELECTRICAL CHARACTERISTICS The ● 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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