LTM8071 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the specified operatingtemperature range, otherwise specifications are at TJ = 25°C. VIN = 12V, RUN = 2V, unless otherwise noted. PARAMETERCONDITIONSMINTYPMAXUNITS Minimum Input Voltage VIN Rising l 3.6 V Output DC Voltage RFB Open 0.97 V RFB = 17.2kΩ 15 V Peak Output DC Current VOUT = 3.3V, fSW = 1MHz 7.25 A Quiescent Current Into VIN RUN = 0V 3 µA BIAS = 0V, No Load, SYNC = 0V, Not Switching 300 µA Quiescent Current Into BIAS BIAS = 5V, RUN = 0V 1 µA BIAS = 5V, No Load, SYNC = 0V, Not Switching 275 µA BIAS = 5V, VOUT = 3.3V, IOUT = 3.5A, fSW = 1MHz 25 mA Line Regulation 5.5V < VIN < 36V, IOUT = 1A 0.5 % Load Regulation 0.1A < IOUT < 3.5A 0.5 % Output Voltage Ripple IOUT = 3.5A 10 mV Switching Frequency RT = 232kΩ 200 kHz RT = 41.2kΩ 1 MHz RT = 15.8kΩ 2.2 MHz Voltage at FB l 955 970 985 mV Minimum BIAS Voltage (Note 5) 3.2 V RUN Threshold Voltage Run Rising 0.9 1.06 V Run Leakage Current 1 µA TR/SS Current TR/SS = 0V 2 µA TR/SS Pull-Down TR/SS = 0.1V 200 Ω PG Threshold Voltage at FB (Upper) FB Falling (Note 6) 1.05 V PG Threshold Voltage at FB (Lower) FB Rising (Note 6) 0.89 V PG Leakage Current PG = 42V 1 µA PG Sink Current PG = 0.1V 150 µA SYNC Threshold Voltage Synchronization 0.4 1.5 V SYNC Voltage To Enable Spread Spectrum 2.9 4.2 V SYNC Current SYNC = 0V 35 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings conjunction with board layout, the rated package thermal resistance and may cause permanent damage to the device. Exposure to any Absolute other environmental factors. Maximum Rating condition for extended periods may affect device Note 4: The LTM8071 contains overtemperature protection that is reliability and lifetime. intended to protect the device during momentary overload conditions. The Note 2: Unless otherwise noted, the absolute minimum voltage is zero. internal temperature exceeds the maximum operating junction temperature Note 3: The LTM8071E is guaranteed to meet performance specifications when the overtemperature protection is active. Continuous operation from 0°C to 125°C internal. Specifications over the full –40°C to above the specified maximum operating junction temperature may impair 125°C internal operating temperature range are assured by design, device reliability. characterization and correlation with statistical process controls. The N ote 5. Below this specified voltage, internal circuitry will draw power LTM8071I is guaranteed to meet specifications over the full –40°C to from VIN. 125°C internal operating temperature range. Note that the maximum Note 6. PG transitions from low to high. internal temperature is determined by specific operating conditions in Rev 0 For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Package Photos Package Description Typical Application Related Parts
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