Datasheet LTC3534 (Analog Devices) - 3

LTC3534
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT = 5V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Start-Up Voltage l 2.2 2.4 V Input Operating Range l 2.4 7 V Output Voltage Adjust Range l 1.8 7 V Feedback Voltage (Note 4) l 0.975 1 1.015 V Feedback Input Current VFB = Measured Feedback Voltage (Note 4) 1 50 nA VIN Quiescent Current – Burst Mode VFB = 1.2V, VPWM = 0V (Note 5) 25 50 µA Operation VIN Quiescent Current – Shutdown VRUN/SS = 0V, Not Including Switch Leakage, VOUT = 0V 0.1 1 µA VIN Quiescent Current – Active VFB = 1.2V, VPWM = 5V (Note 5) 420 700 µA Input Current Limit VPWM = 5V l 1 1.8 A Reverse Current Limit VPWM = 5V 500 mA Burst Current Limit VPWM = 0V 400 mA NMOS Switches Leakage Switches B and C 0.1 7 µA PMOS Switches Leakage Switches A and D 0.1 10 µA PMOS Switches On-Resistance Switches A and D 260 mΩ NMOS B Switch On-Resistance Switch B 275 mΩ NMOS C Switch On-Resistance Switch C 215 mΩ Maximum Duty Cycle Boost (% Switch C On) l 75 85 % Buck (% Switch A On) l 100 % Minimum Duty Cycle l 0 % Frequency l 0.80 1 1.15 MHz Error Amp AVOL (Note 4) 74 dB Error Amp Source Current –15 µA Error Amp Sink Current 225 µA RUN/SS Threshold l 0.4 1 1.4 V RUN/SS Input Current – Shutdown VRUN/SS = 400mV; IC is Shut Down 0.02 1 µA RUN/SS Input Current – Active VRUN/SS = 5V; IC is Enabled 0.28 1 µA PWM Threshold Measured at PWM Pin; Voltage at which Burst Mode Operation is 0.4 1 1.4 V Disabled (PWMing Enabled) PWM Input Current VPWM = 5V 1.25 2.5 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
This IC includes overtemperature protection that is intended may cause permanent damage to the device. Exposure to any Absolute to protect the device during momentary overload conditions. Junction Maximum Rating condition for extended periods may affect device temperature will exceed 125°C when overtemperature protection is active. reliability and lifetime. Continuous operation above the specified maximum operating junction
Note 2:
The LTC3534E is guaranteed to meet performance specifications temperature may result in device degradation or failure. from 0°C to 85°C. Specifications over the –40°C to 85°C operating
Note 4:
The IC is tested in a feedback loop to make this measurement. temperature range are assured by design, characterization and correlation
Note 5:
Current Measurements are performed when the outputs are not with statistical process controls. switching. 3534fb For more information www.linear.com/LTC3534 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts