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LTC3555IUFD-TRPBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC3555IUFD-TRPBF Datasheet(HTML) 6 Page - Linear Technology |
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6 / 32 page  LTC3555/LTC3555-X 6 3555fd ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VBUS = 5V, BAT = 3.8V, DVCC = 3.3V, RPROG = 1k, RCLPROG = 3k, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VFBHIGH2 Maximum Servo Voltage Full Scale (1, 1, 1, 1) (Note 8) l 0.78 0.80 0.82 V VFBLOW2 Minimum Servo Voltage Zero Scale (0, 0, 0, 0) (Note 8) 0.405 0.425 0.445 V VLSB2 VFB2 Servo Voltage Step Size 25 mV RP2 PMOS RDS(ON) 0.6 Ω RN2 NMOS RDS(ON) 0.7 Ω RLDO_CL2 LDO Mode Closed-Loop ROUT 0.25 Ω RLDO_OL2 LDO Mode Open-Loop ROUT (Note 9) 2.5 Ω General Purpose Switching Regulator 3 IVIN3 Pulse Skip Mode Input Current Burst Mode Input Current Forced Burst Mode Input Current LDO Mode Input Current Shutdown Input Current IOUT3 = 0μA (Note 6) IOUT3 = 0μA (Note 6) IOUT3 = 0μA (Note 6) IOUT3 = 0μA (Note 6) IOUT3 = 0μA, FB3 = 0V 225 35 20 20 60 35 35 1 μA μA μA μA μA ILIMSW3 PMOS Switch Current Limit Pulse Skip/Burst Mode Operation 1500 2000 2800 mA IOUT3 Available Output Current Pulse Skip/Burst Mode Operation (Note 7) Forced Burst Mode Operation (Note 7) LDO Mode (Note 7) 1000 150 50 mA mA mA VFBHIGH3 Maximum Servo Voltage Full Scale (1, 1, 1, 1) (Note 8) l 0.78 0.80 0.82 V VFBLOW3 Minimum Servo Voltage Zero Scale (0, 0, 0, 0) (Note 8) 0.405 0.425 0.445 V VLSB3 VFB Servo Voltage Step Size 25 mV RP3 PMOS RDS(ON) 0.18 Ω RN3 NMOS RDS(ON) 0.30 Ω RLDOCL3 LDO Mode Closed Loop ROUT 0.25 Ω RLDOOL3 LDO Mode Open Loop ROUT (Note 9) 2.5 Ω tRST3 Power On Reset Time for Switching Regulator VFB3 Within 92% of Final Value to RST3 Hi-Z 230 ms 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 LTC3555E/LTC3555E-X are guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the – 40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3555I/LTC3555I-X are guaranteed to meet performance specifications over the full –40°C to 85°C operating temperature range. Note 3: The LTC3555/LTC3555-X include overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Note 4: Total input current is the sum of quiescent current, IVBUSQ, and measured current given by: VCLPROG/RCLPROG • (hCLPROG +1) Note 5: hC/10 is expressed as a fraction of measured full charge current with indicated PROG resistor. Note 6: FBx above regulation such that regulator is in sleep. Specification does not include resistive divider current reflected back to VINx. Note 7: Guaranteed by design but not explicitly tested. Note 8: Applies to pulse skip, Burst Mode operation and forced Burst Mode operation only. Note 9: Inductor series resistance adds to open-loop ROUT. |
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Similar Description - LTC3555IUFD-TRPBF |
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