Datasheet LT8210 (Analog Devices) - 5

LT8210
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VINP = 12V, VEN/UVLO = 3.3V, VEXTVCC = 0V PARAMETER CONDITIONS MIN TYP MAX UNITS
FB2 Regulation Voltage Regulation Voltage Pass-Thru Mode Buck Loop l 0.985 1.00 1.015 V FB1, FB2 Input Bias Current l 0.001 0.04 µA FB1, FB2 Line Regulation VINP = 3V to 100V l 0.001 0.007 %/V FB1, FB2 Error Amplifier Transconductance 450 µA/V VC1, VC2 Output Impedance 5 MΩ VC1, VC2 Maximum Sourcing Current VFB1 = VFB2 = 0V 35 µA VC1, VC2 Maximum Sinking Current VFB1 = VFB2 = 2V –35 µA Soft-Start Charging Current VSS = 0.5V l 4 5 6 µA Soft-Start Pull-Down Resistance l 140 250 Ω
Average Current Monitoring and Regulation
SNSP2, SNSN2 Operating Voltage Range l 0 100 V SNSP2, SNSN2 Pin Bias Current VSNSP2 = VSNSN2 = 100V l 1 3 µA VSNSP2 = VSNSN2 = 0V l –3 0 µA IMON Output Current VSNSP2 – VSNSN2 = 150mV l 87.3 90 92.7 µA Common Mode Voltage = 12V VSNSP2 – VSNSN2 = 50mV l 28.6 30 31.4 µA VSNSP2 – VSNSN2 = 10mV l 5.1 6 6.6 µA IMON Output Current VSNSP2 – VSNSN2 = 150mV l 85 90.5 95 µA Common Mode Voltage = 0V VSNSP2 – VSNSN2 = 50mV l 27 30 33 µA VSNSP2 – VSNSN2 = 10mV l 4 6 8.5 µA Common Mode Switchover Voltage VSNSP2 = VSNSN2 1.8 V IMON DC CMRR VSNSP2 – VSNSN2 = 150mV, VSNSP2 = 3V to 100V 120 dB IMON Error Amplifier Transconductance 200 µA/V IMON Regulation Voltage (VIMON) l 0.98 1.01 1.03 V Sense Regulation Voltage (VSNSP2 – VSNSN2) RIMON = 33.2k l 48 50.5 53 mV Over-Current Warning Threshold (VIMON) l 1.15 1.2 1.24 V Over-Current Warning Hysteresis 45 mV IMON Disable Threshold (VIMON) Rising l 2.3 2.5 2.8 V IMON Disable Hysteresis 400 mV
Cycle-by-Cycle Inductor Current Limiting
Maximum Current Sense Threshold Buck Regulation (VINP = 24V, VOUT = 0V) l 45 53 60 mV (VSNSP1 – VSNSN1) Buck Regulation (VINP = 24V, VOUT = 12V) l 55 62 69 mV Boost Regulation (VINP = 6V, VOUT = 12V) l 45 51 58 mV Buck Regulation (VINP = 100V, VOUT = 48V) l 73 85 96 mV Boost Regulation (VINP = 24V, VOUT = 48V) l 36 45 54 mV Maximum Non-Switching Current Sense VOUT = VINP, FB1 = 1.2V, FB2 = 0.8V l 57 63 70 mV Threshold in Pass-Thru (VSNSP1 – VSNSN1) MODE1 = MODE2 = 3.3V Reverse Current Sense Threshold DCM/Pass-Thru/Burst Mode Operation 3 mV (VSNSP1 – VSNSN1) Pass-Thru Buck-Boost Regions –6 mV Negative Current Sense Threshold CCM Operating Mode (MODE1 = MODE2 = 0V) –55 mV (VSNSP1 – VSNSN1)
MOSFET Gate Drivers
TG1, TG2 Gate Driver Pull-Up Resistance 3 Ω TG1, TG2 Gate Driver Pull-Down Resistance 1 Ω BG1, BG2 Gate Driver Pull-Up Resistance 2.6 Ω Rev. A For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Revision History Typical Application Related Parts