LT3587 ELECTRICAL CHARACTERISTICSThe l denotes the specifi cations which apply over the full operatingtemperature range, otherwise specifi cations are at TA = 25°C. VVIN = 3.6V, VEN/SS1 = VEN/SS3 = VVIN unless otherwise noted (Note 2, 3).PARAMETERCONDITIONSMINTYPMAXUNITSBoost1 CAP1 Bias Current VCAP1 = 15V, VOUT1 = Open 60 150 μA FB1 Reference Voltage l 1.19 1.22 1.25 V VOUT1 Output Voltage RFB1 = 1MΩ l 14.25 15 15.75 V SW1 Current Limit 800 990 mA SW1 VCESAT ISW1 = 400mA 200 mV SW1 Leakage Current VSW1 = 15V 0.1 5 μA EN/SS1 for Full Inductor Current VFB1 = 1.1V, VFB2 = 0.1V 2.5 V EN/SS1 Shutdown Voltage Threshold l 0.2 V EN/SS1 Pin Bias Current VEN/SS1 = 0V –0.5 –1 –1.5 μA VOUT1 Current Limit VCAP1 = 15V 100 155 mA CAP1 to VOUT1 On-Resistance (RDISC1) VCAP1 = 15V, IVOUT1= 50mA 5 8 Ω VOUT1 Disconnect Leakage VVIN = VCAP1 = 6V, VVOUT1 = 0V 0.1 1 μA Inverter FB2 Reference Voltage l –10 5 20 mV Output Voltage RFB2 = 1MΩ l –7.5 –8 –8.5 V SW2 Current Limit 900 1090 mA SW2 VCESAT ISW2 = 600mA 250 mV SW2 Leakage Current VSW2 = 15V 0.1 5 μA FB1 Threshold to Start Negative Channel Percent of Final Regulation Value 87 90 % Boost3 CAP3 Bias Current VCAP3 = 15V, VOUT3 = Open 70 150 μA Boost3 Programmed Current RIFB3 = 8.06kΩ l 18 20 22 mA VFB3 Reference Voltage RVFB3 = 1MΩ, IVOUT3 = 20mA l 0.77 0.8 0.83 V VOUT3 Output Voltage RVFB3 = 1MΩ, IVOUT3 = 20mA l 14 15 16 V SW3 Current Limit 400 480 mA SW3 VCESAT ISW3 = 200mA 250 mV SW3 Leakage Current VSW3 = 15V 0.1 5 μA EN/SS3 for Full Inductor Current VVFB3 = VIFB3 = 0.6V 2 V EN/SS3 Shutdown Voltage Threshold l 0.2 V EN/SS3 Pin Bias Current VEN/SS3 = 0V –0.5 –1 –1.5 μA VOUT3 Current Limit VCAP3 = 15V, VIFB3 = 0V 70 110 mA CAP3 to VOUT3 On Resistance (RDISC3) VCAP3 = 15V, IVOUT3 = 20mA 10 15 Ω VOUT3 Disconnect Leakage VVIN = VCAP3 = 6V, VVOUT3 = 0V 0.1 1 μA CAP3 Pin Overvoltage Clamp 27 29 31 V Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 2: All currents into pins are positive; all voltages are referenced to may cause permanent damage to the device. Exposure to any Absolute GND unless otherwise noted. Maximum Rating condition for extended periods may affect device Note 3: The LT3587 is guaranteed to meet specifi ed performance from reliability and lifetime. 0°C to 125°C. Specifi cations over the –40°C to 125°C operating range are assured by design, characterization and correlation with statistical process controls. 3587fc 3
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