Datasheet LT3791-1 (Analog Devices) - 3

LT3791-1
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VEN/UVLO = 12V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Logic Inputs
EN/UVLO Falling Threshold l 1.16 1.2 1.24 V EN/UVLO Rising Hysteresis 15 mV EN/UVLO Input Low Voltage IVIN Drops Below 1µA 0.3 V EN/UVLO Pin Bias Current Low VEN/UVLO = 1V 2 3 4 µA EN/UVLO Pin Bias Current High VEN/UVLO = 1.6V 10 100 nA CCM Threshold Voltage 0.3 1.5 V CTRL Input Bias Current VCTRL = 1V 20 50 nA CTRL Latch-Off Threshold 175 mV OVLO Rising Shutdown Voltage l 2.85 3 3.15 V OVLO Falling Hysteresis 75 mV
Regulation
VREF Voltage l 1.96 2.00 2.04 V VREF Line Regulation 4.7V < VIN < 60V 0.002 0.04 %/V V(ISP-ISN) Threshold VCTRL = 2V 97.5 100 102.5 mV l 94 100 106 mV VCTRL = 1100mV 87 90 93 mV l 84 90 96 mV VCTRL = 700mV 47.5 50 52.5 mV l 46 50 54 mV VCTRL = 300mV 6.5 10 13.5 mV l 5 10 15 mV ISP Bias Current 110 µA ISN Bias Current 20 µA Output Current Sense Common Mode Range 0 60 V Output Current Sense Amplifier gm 890 µS ISMON Monitor Voltage V(ISP-ISN) = 100mV l 0.96 1 1.04 V Input Current Sense Threshold V(IVINP-IVINN) 3V ≤ VIVINP ≤ 60V l 46.5 50 54 mV IVINP Bias Current 90 µA IVINN Bias Current 20 µA Input Current Sense Common Mode Range 3 60 V Input Current Sense Amplifier gm 2.12 mS IVINMON Monitor Voltage V(IVINP-IVINN) = 50mV l 0.96 1 1.04 V FB Regulation Voltage 1.194 1.2 1.206 V l 1.176 1.2 1.220 V FB Line Regulation 4.7V < VIN < 60V 0.002 0.025 %/V FB Amplifier gm 565 µS FB Pin Input Bias Current FB in Regulation 100 200 nA VC Standby Input Bias Current PWM = 0V –20 20 nA VSENSE(MAX) (VSNSP-SNSN) Boost l 42 51 60 mV Buck l –56 –47.5 –39 mV
Fault
SS Pull-Up Current VSS = 0V 14 µA SS Discharge Current 1.4 µA 37911fb For more information www.linear.com/LT3791-1 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts