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LT3743 Datasheet(PDF) 3 Page - Linear Technology |
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LT3743 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 28 page  LT3743 3 3743f ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VEN/UVLO = 5V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Range (Note 2) 6 36 V VIN Pin Quiescent Current (Note 3) Non-Switching Operation Shutdown Mode VPWM = VCTRL_SEL = 0V, Not Switching VEN/UVLO = 0V l 1.8 0.1 2.5 1 mA μA EN/UVLO Pin Falling Threshold 1.49 1.55 1.61 V EN/UVLO Hysteresis 130 mV EN/UVLO Pin Current VIN = 6V, EN/UVLO = 1.45V 5.5 μA PWM Pin Threshold 1.0 V CTRL_SEL Threshold 1.0 V SYNC Pin Threshold 1.0 V CTRL_H and CTRL_L Pin Control Range 0 1.5 V CTRL_H and CTRL_L Pin Current 100 nA Reference Reference Voltage (VREF Pin) With a 67kΩ Resistor from VREF to GND l 1.96 2 2.04 V Inductor Current Sensing Full Range SENSE+ to SENSE– VCTRL_H or VCTRL_L = 1.5V l 48 51 54 mV SENSE+ Pin Current 50 nA SENSE– Pin Current With VOUT ~ 4V 10 μA Internal VCC Regulator (VCC_INT Pin) Regulation Voltage l 4.7 5 5.2 V NMOS FET Driver (Note 2) Non-Overlap time HG to LG 100 ns Non-Overlap time LG to HG 60 ns Minimum On-Time LG (Note 4) 50 ns Minimum On-Time HG (Note 4) 200 ns Minimum Off-Time LG (Note 4) 60 ns High Side Driver Switch On-Resistance Gate Pull Up Gate Pull Down VCBOOT – VSW = 5V 2.3 1.3 Ω Ω Low Side Driver Switch On-Resistance Gate Pull Up Gate Pull Down VCC_INT = 5V 2.5 1.3 Ω Ω Switching Frequency fSW RT = 40kΩ RT = 200kΩ l 930 200 1000 218 1070 233 kHz kHz Soft-Start Charging Current 5.5 μA Voltage Regulation Amplifier Input Bias Current 1nA gm 200 μA/V Feedback Regulation Voltage l 0.945 0.99 1.025 V |
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