Datasheet LTM8051 (Analog Devices) - 3

link to page 2 LTM8051
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating internal temperature range, otherwise specifications are at TA = 25°C. VIN1n = 12V, RUNn = 2V unless otherwise noted (Note 2). PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum VIN1 Input Voltage l 3.0 V Minimum VIN23 Input Voltage l 3.0 V Minimum VIN4 Input Voltage VIN1 = 3V l 2.0 V Output DC Voltage FBn open 0.8 V FBn = 27.4kΩ 8 V Maximum Output DC Current (Note 3) 2.5 A Quiescent Current into VINn RUNn = 0 2 4 μA BIASn = 5V, SYNCn = 0V, No load 60 µA BIASn = 5V, SYNCn = 3.3V, No load 10 mA Current into BIASn RUNn = 0, BIASn = 5V 1 μA BIASn = 5V, SYNCn = 3.3V, No load 7 mA Line Regulation 5V < VINn < 40V 0.1 % Load Regulation 12VINn, 0.1A < IOUTn <2A 0.2 % Output RMS Ripple 3.3VOUTn 10 mV FBn Voltage 792 800 808 mV l 784 800 816 mV Current out of FBn VOUTn = 1V, FBn = 0V 4 μA Minimum BIASn for Proper Operation 3.2 V Switching Frequency RTn = 113KΩ 300 KHz RTn = 30.9KΩ 1 MHz RTn = 7.15KΩ 3 MHz RUNn Threshold 0.74 V RUNn Input Current RUNn = 0V 1 μA PGn Threshold at FBn FBn Rising 740 mV FBn Falling 860 mV PGn Output Sink Current PGn = 0.1V 100 μA CLKOUTn VOL 0 V CLKOUTn VOH 3.3 V SYNCn Input High Threshold 1.5 V SYNCn Input Low Threshold 0.8 V SYNCn Threshold to Enable Spread Spectrum 2.8 4 V SYNCn Current SYNCn = 6V 65 μA TRSSn Source Current TRSSn = 0V 2 μA TRSSn Pull-Down Resistance Fault Condition, TRSSn = 0.1V 230 Ω
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings The LTM8051I is guaranteed to meet specifications over the full –40°C may cause permanent damage to the device. Exposure to any Absolute to 125°C internal operating temperature range. Note that the maximum Maximum Rating condition for extended periods may affect device internal temperature is determined by specific operating conditions in reliability and lifetime. conjunction with board layout, the rated package thermal resistance and
Note 2:
The LTM8051E is guaranteed to meet performance specifications other environmental factors. from 0°C to 125°C internal. Specifications over the full –40°C to
Note 3:
The maximum current out of either channel may be limited by the 125°C internal operating temperature range are assured by design, internal temperature of the LTM8051. See output current derating curves characterization and correlation with statistical process controls. for different VIN, VOUT, and TA. Rev. 0 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 Package Photo Design Resources Related Parts