Datasheet LT1618 (Analog Devices) - 3

LT1618
ELECTRICAL CHARACTERISTICS The
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denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 1.6V, VSHDN = 1.6V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch VCESAT ISW = 1A (Note 4) 200 260 mV Switch Leakage Current Switch Off, VSW = 5V 0.01 5 µA SHDN Pin Current VSHDN = 1.6V 5 20 µA Shutdown Threshold (SHDN Pin) 0.3 V Start-Up Threshold (SHDN Pin) 1 V
Note 1:
Absolute Maximum Ratings are those values beyond which the life temperature range are assured by design, characterization, and correlation of a device may be impaired. with statistical process controls.
Note 2:
The LT1618 is guaranteed to meet performance specifications
Note 3:
Bias currents flow into the ISP and ISN pins. from 0°C to 70°C. Specifications over the – 40°C to 85°C operating
Note 4:
Switch current limit and switch VCESAT for the DD package is guaranteed by design and/or correlation to static test.
W U TYPICAL PERFOR A CE CHARACTERISTICS Switch Saturation Voltage (VCE, SAT) FB Pin Voltage and Bias Current Switch Current Limit
500 1.270 4 2.5 FB PIN BIAS CURRENT (nA) 400 2.0 1.265 2 TJ = 125°C VOLTAGE 300 1.5 TJ = 25°C 1.260 0 CURRENT 1.0 200 PEAK CURRENT (A) T FEEDBACK VOLTAGE (V) J = –50°C 1.255 – 2 SATURATION VOLTAGE (mV) 0.5 100 0 1.250 – 4 0 0 0.5 1.0 1.5 2.0 – 50 – 25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 1618 G02 1618 G01 1618 G03
Current Sense Voltage Current Sense Voltage (IADJ Pin = 0V) (VISP, ISN) Quiescent Current
52 60 2.5 50 2.0 VIN = 18V 51 V 40 IN = 1.6V 1.5 50 30 1.0 20 49 QUIESCENT CURRENT (mA) 0.5 CURRENT SENSE VOLTAGE (mV) CURRENT SENSE VOLTAGE (mV) 10 48 0 0 – 50 – 25 0 25 50 75 100 125 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 – 50 – 25 0 25 50 75 100 125 TEMPERATURE (°C) IADJ PIN VOLTAGE (V) TEMPERATURE (°C) 1618 G04 1618 G05 1618 G06 sn1618 1618fas 3