Datasheet LT8337 (Analog Devices) - 3

LT8337/LT8337-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, EN/UVLO = 2V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operation Voltage l 2.7 28 V VIN Quiescent Current in Shutdown EN/UVLO = 0.15V 0.3 1 µA EN/UVLO = 0.15V l 0.3 10 µA LT8337 VIN Quiescent Current SYNC/MODE = 0V, Not Switching 4 8 µA SYNC/MODE = Open, Not Switching 0.9 1.5 mA VIN = 10.1V, VOUT = 10V, FB = 1.05V (In PassThru Mode) 15 25 µA LT8337-1 VIN Quiescent Current SYNC/MODE = 0V, Not Switching 23 35 µA SYNC/MODE = Open, Not Switching 0.9 1.5 mA VIN = 10.1V, VOUT = 10V, FB = 1.05V (In PassThru Mode) 30 60 µA FB Regulation Voltage 0.994 1.000 1.006 V E-Grade l 0.983 1.000 1.010 V J-Grade l 0.980 1.000 1.012 V FB Line Regulation 2.7V < VIN < 28V l 0.005 0.03 %/V FB Pin Input Current FB = 1.0V –20 20 nA Switching Frequency RT = 357kΩ 270 300 330 kHz RT = 102kΩ 0.93 1 1.07 MHz RT = 47.5kΩ l 1.85 2 2.15 MHz RT = 30.1kΩ 2.7 3 3.3 MHz Spread Spectrum Modulation Frequency 0.45 % as Percentage of fSW Spread Spectrum Modulation Frequency 20 % Range as Percentage of fSW Synchronizable Frequency SYNC/MODE = External Clock l 0.3 3 MHz SYNC/MODE Pin Input Logic Level for SYNC Logic Low l 0.4 V Frequency Synchronization SYNC Logic High l 1.7 V Soft-Start Time RT = 47.5kΩ 1.4 ms EN/UVLO Threshold Voltage Falling l 0.94 1.0 1.06 V Hysteresis 90 mV EN/UVLO Input Bias Current EN/UVLO = 2V –40 40 nA LT8337 PG Upper Threshold Offset from FB Falling l 5 8 12 % Regulated FB Hysteresis 1 % LT8337 PG Lower Threshold Offset from FB Rising l –12 –8 –5 % Regulated FB Hysteresis 1 % LT8337 PG Leakage Current PG = 3.5V –40 40 nA LT8337 PG Pull-Down Resistance PG = 0.1V 700 2000 Ω LT8337-1 Error Amp Transconductance VC = 1.25V 0.4 mS LT8337-1 Error Amp Gain 400 V/V LT8337-1 VC Source Current FB = 0.8V, VC = 1.25V –75 μA LT8337-1 VC Sink Current FB = 1.2V, VC = 1.25V 70 μA LT8337-1 VC Pin to Switch Current Gain 6.0 A/V Rev. A For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts