LT1618 WWWUABSOLUTE AXI URATI GS (Note 1) VIN, SHDN Voltage ... 18V Junction Temperature ... 125°C SW Voltage .. 36V Operating Temperature Range (Note 2) .. – 40°C to 85°C ISP, ISN Voltage .. 36V Storage Temperature Range IADJ Voltage ... 6V MSOP ... – 65°C to 150°C FB Voltage .. 1.5V DFN ... – 65°C to 125°C VC Voltage .. 1.5V Lead Temperature (Soldering, 10 sec) (MSOP) .. 300°C UWUPACKAGE/ORDER I FOR ATIO TOP VIEW ORDER PART ORDER PART NUMBER NUMBER FB 1 10 TOP VIEW VC ISN 2 9 SHDN FB 1 10 VC ISP 3 11 8 V LT1618EDD ISN 2 9 SHDN LT1618EMS IN ISP 3 8 VIN I 4 7 SW ADJ I 4 ADJ 7 SW GND 5 6 NC GND 5 6 SW DD PART MS PART MS PACKAGE DD PACKAGE MARKING 10-LEAD PLASTIC MSOP MARKING 10-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W EXPOSED PAD (PIN 11) IS GND AND LAFQ LTNH MUST BE SOLDERED TO PCB Consult LTC marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25 ° C. VIN = 1.6V, VSHDN = 1.6V, unless otherwise noted.PARAMETERCONDITIONSMINTYPMAXUNITS Input Voltage 1.6 18 V Quiescent Current VSHDN = 1.6V, Not Switching 1.8 2.7 mA VSHDN = 0V 0.1 1 µA Reference Voltage Measured at FB Pin 1.250 1.263 1.276 V ● 1.243 1.263 1.283 V Reference Voltage Line Regulation 1.6V < VIN < 18V 0.01 0.03 %/V FB Pin Bias Current VFB = 1.263V, VIN = 1.8V ● ±2 ±12 nA Error Amplifier Voltage Gain 180 V/V Error Amplifier Transconductance ∆IC = ± 5µA 160 µmho Error Amplifier Sink Current VFB = 1.35V, VC = 1V 15 µA Error Amplifier Source Current VFB = 1.10V, VC = 1V 30 µA Current Sense Voltage (ISP, ISN) VFB = 0V, VIADJ = 0V ● 47.5 50 52.5 mV ISP, ISN Pin Bias Currents (Note 3) V ISP = 1.85V, VISN = 1.80V, VIADJ = 0V 50 80 µA (ISP, ISN) Common Mode Minimum Voltage 1.8 V Switching Frequency VFB = 1V 1.25 1.4 1.6 MHz VFB = 0V 550 kHz Maximum Switch Duty Cycle ● 88 92 % Switch Current Limit (Note 4) 1.5 2.1 2.8 A sn1618 1618fas 2
