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LTC3402 Datasheet(PDF) 3 Page - Linear Technology |
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LTC3402 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 16 page  3 LTC3402 3402fb The ● denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25 °C. VIN = 1.2V, VOUT = 3.3V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS PGOOD Low Voltage IPGOOD = 1mA 0.1 0.2 V VOUT = 1V, IPGOOD = 20μA 0.1 0.4 V PGOOD Leakage VPGOOD = 5.5V 0.01 1 μA SHDN Input High VIN = VSHDN 1V SHDN Input Low 0.4 V SHDN Input Current VSHDN = 5.5V 0.01 1 μA ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.. Note 2: The LTC3402E is guaranteed to meet performance specifications from 0 °C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Current is measured into the VOUT pin since the supply current is bootstrapped to the output pin and in the application will reflect to the input supply by (VOUT/VIN) • I/Efficiency. The outputs are not switching. Note 4: Once the output is started, the IC is not dependent upon the VIN supply. TYPICAL PERFOR A CE CHARACTERISTICS Switching Waveform on SW Pin SW Pin and Inductor Current (IC) in Discontinuous Mode. Ringing Control Circuitry Eliminates High Frequency Ringing Transient Response 5mA to 50mA SW 1V/DIV 50ns/DIV 3402 G01 SW 1V/DIV 200ns/DIV 3402 G02 0V 0A IL 50mA/DIV IOUT COUT = 22μF 200 μs/DIV 3402 G03 L = 3.3 μH fOSC = 1MHz VOUT 100mV/DIV 50mA 5mA (TA = 25°C unless otherwise noted) Transient Response 50mA to 500mA Burst Mode Operation Burst Mode Operation VOUT 200mV/DIV 550mA 50mA COUT = 22μF 200 μs/DIV 3402 G04 L = 3.3 μH fOSC = 1MHz VOUT AC 100mV/DIV VIN = 1.2V 5ms/DIV 3402 G05 VOUT = 3.3V COUT = 100μF IOUT = 250μA MODE/SYNC PIN = HIGH SW 1V/DIV VOUT AC 100mV/DIV VIN = 1.2V 200 μs/DIV 3402 G06 VOUT = 3.3V COUT = 100μF IOUT = 20mA MODE/SYNC PIN = HIGH SW 1V/DIV |
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