Datasheet LT3597 (Analog Devices) - 5

LT3597
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. VIN Quiescent Current VBIAS Quiescent Current Shutdown Current
3.0 3.0 2.00 VBIAS = 5V VIN = 24V V 125°C IN = 55V 1.75 VBIAS = 25V 2.5 125°C 2.5 25°C 2.0 1.50 –40°C 2.0 –40°C 1.25 1.5 1.5 25°C 1.00 CURRENT (mA) CURRENT (mA) 1.0 CURRENT (µA) 0.75 V IN 1.0 V BIAS 0.5 0.50 IVIN 0.5 0 0.25 IBIAS 0 –0.5 0 0 10 20 30 40 50 60 0 5 10 15 20 25 –50 –25 0 25 50 75 100 125 VIN VOLTAGE (V) VBIAS VOLTAGE (V) TEMPERATURE (°C) 3597 G01 3597 G02 3597 G03
UVLO Threshold Voltage (Falling) EN/UVLO Pin Bias Current VREF Voltage
1.8 6 2.04 VREF LOAD = 0µA 1.7 2.03 5 EN/UVLO = 1.4V 1.6 2.02 4 1.5 2.01 VIN = 55V VIN = 24V 1.4 3 2.00 VOLTAGE (V) VIN = 6V 1.3 CURRENT (µA) 1.99 UVLO VOLTAGE (V) 2 V REF 1.2 1.98 1 1.1 1.97 EN/UVLO = 1.6V 1.0 0 1.96 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3597 G04 3597 G05 3597 G06
Switching Frequency Current Limit Switch Voltage Drop
1.2 600 600 VBIAS = 5V RT = 33.2k SWITCH 1.0 500 500 125°C 25°C 0.8 400 400 –40°C 0.6 300 DA 300 CURRENT (mA) FREQUENCY (MHz) 0.4 200 200 RT = 220k 0.2 100 SWITCH VOLTAGE DROP (mV) 100 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 50 100 150 200 250 TEMPERATURE (°C) TEMPERATURE (°C) SWITCH CURRENT (mA) 3597 G07 3597 G08 3597 G09 3597fa 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts