Datasheet LTM8002 (Analog Devices) - 3

LTM8002
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TJ = 25°C. VIN = 12V, RUN = 2V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage VIN Rising l 3.4 V Output DC Voltage LTM8002, RFB Open 0.97 V LTM8002, RFB = 5.62kΩ, VIN = 40V 18 V LTM8002-3.3 3.3 Peak Output DC Current VOUT = 3.3V, fSW = 1MHz 3.5 A Quiescent Current into VIN RUN = 0V 3 µA BIAS = 0V, No Load, SYNC = 0V, Not Switching 8 µA Quiescent Current into BIAS BIAS = 5V, RUN = 0V 1 µA BIAS = 5V, No Load, SYNC = 0V, Not Switching 5 µA BIAS = 5V, VOUT = 3.3V, IOUT = 2.5A, fSW = 1MHz 12 mA Line Regulation 5.5V < VIN < 36V, IOUT = 1A 0.5 % Load Regulation 0.1A < IOUT < 2.5A 0.5 % Output Voltage Ripple IOUT = 2.5A 10 mV Switching Frequency RT = 232kΩ 200 kHz RT = 41.2kΩ 1 MHz RT = 10.7kΩ 3 MHz Voltage at FB LTM8002 l 950 970 980 mV Minimum BIAS Voltage (Note 5) 3.2 V RUN Threshold Voltage 0.9 1.06 V RUN 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, LTM8002) 1.05 V PG Threshold Voltage at FB (Lower) FB Rising (Note 6, LTM8002) 0.89 V PG Threshold Voltage at VOUT (Upper) VOUT Falling (Note 6, LTM8002-3.3) 3.57 V PG Threshold Voltage at VOUT (Lower) VOUT Rising (Note 6, LTM8002-3.3) 3.03 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
Note 4:
The LTM8002 contains overtemperature protection that is may cause permanent damage to the device. Exposure to any Absolute intended to protect the device during momentary overload conditions. The Maximum Rating condition for extended periods may affect device internal temperature exceeds the maximum operating junction temperature reliability and lifetime. when the overtemperature protection is active. Continuous operation
Note 2:
Unless otherwise noted, the absolute minimum voltage is zero. above the specified maximum operating junction temperature may impair
Note 3:
The LTM8002I is guaranteed to meet specifications over the full device reliability. –40°C to 125°C internal operating temperature range. The LTM8002H
Note 5:
Below this specified voltage, internal circuitry will draw power is guaranteed to meet specifications over the full –40°C to 150°C from VIN. internal operating temperature range. Note that the maximum internal
Note 6:
PG transitions from low to high. temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C. Rev 0 For more information www.analog.com 3 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE PHOTO PACKAGE DESCRIPTION PACKAGE DESCRIPTION TYPICAL APPLICATION DESIGN RESOURCES RELATED PARTS