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LTC4012CUFTRPBF Datasheet(PDF) 4 Page - Linear Technology |
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LTC4012CUFTRPBF Datasheet(HTML) 4 Page - Linear Technology |
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4 / 28 page  LTC4012/ LTC4012-1/LTC4012-2 4 4012f ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. DCIN = 20V, BAT = 12V, GND = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ILEAK-CSP CSP Leakage Current SHDN = 0V or DCIN = 0V, 0V ≤ CSP = CSN = BAT ≤ 20V l –1 0 1 μA ILEAK-SW SW Leakage Current SHDN = 0V or DCIN = 0V, 0V ≤ SW ≤ 20V l –1 0 2 μA INTVDD Regulator INTVDD Output Voltage No Load l 4.85 5 5.15 V ΔVDD Load Regulation IDD = 20mA –0.4 –1 % IDD Short-Circuit Current (Note 5) INTVDD = 0V 50 85 130 mA Switching Regulator IITH ITH Current ITH = 1.4V –40/+90 μA fTYP Typical Switching Frequency 467 550 633 kHz fMIN Minimum Switching Frequency CLOAD = 3.3nF 20 25 kHz DCMAX Maximum Duty Cycle CLOAD = 3.3nF 98 99 % tR-TG TGATE Rise Time CLOAD = 3.3nF, 10% – 90% 60 110 ns tF-TG TGATE Fall Time CLOAD = 3.3nF, 90% – 10% 50 110 ns tR-BG BGATE Rise Time CLOAD = 3.3nF, 10% – 90% 60 110 ns tF-BG BGATE Fall Time CLOAD = 3.3nF, 90% – 10% 60 110 ns tNO TGATE, BGATE Non-Overlap Time CLOAD = 3.3nF, 10% – 10% 110 ns PowerPath Control IDCIN DCIN Input Current 0V ≤ DCIN ≤ CLP l –10 60 μA VFTO Forward Turn-on Voltage (DCIN Detection Threshold) DCIN-CLP, DCIN rising l 15 60 mV VFR Forward Regulation Voltage DCIN-CLP l 15 25 35 mV VRTO Reverse Turn-Off Voltage DCIN-CLP, DCIN falling l –45 –25 –15 mV VOL(INFET) INFET Output Low Voltage, Relative to CLP DCIN-CLP = 0.1V, IINFET =1μA –6.5 –5 V VOH(INFET) INFET Output High Voltage, Relative to CLP DCIN-CLP = –0.1V, IINFET =–5μA –250 250 mV tIF(ON) INFET Turn-On Time To CLP-INFET > 3V, CINFET = 1nF 85 180 μs tIF(OFF) INFET Turn-Off Time To CLP-INFET < 1.5V, CINFET = 1nF 2.5 6 μs Float Voltage Select Inputs (LTC4012-1/LTC4012-2 Only) VIL Input Voltage Low 0.5 V VIH Input Voltage High 3.5 V IIN Input Current 0V ≤ VIN ≤ 5V –10 10 μA Indicator Outputs VOL Output Voltage Low ILOAD = 100μA, PROG = 1.2V 500 mV 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: The LTC4012 is guaranteed to meet performance specifications over the 0°C to 85°C operating temperature range. Note 3: Operating junction temperature TJ (in °C) is calculated from the ambient temperature TA and the total continuous package power dissipation PD (in watts) by the formula TJ = TA + (θJA • PD). Refer to the Applications Information section for details. Note 4: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to GND, unless otherwise specified. Note 5: Output current may be limited by internal power dissipation. Refer to the Applications Information section for details. |
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