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LTC3883-1 Datasheet(PDF) 9 Page - Linear Technology |
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LTC3883-1 Datasheet(HTML) 9 Page - Linear Technology |
9 / 112 page LTC3883/LTC3883-1 9 3883fb For more information www.linear.com/LTC3883 Typical perFormance characTerisTics Load Step (Burst Mode Operation) Load Step (Forced Continuous Mode) Load Step (Pulse-Skipping Mode) Efficiency vs Load Current, VOUT = 1.8V (LTC3883) Efficiency vs Load Current, VOUT = 3.3V (LTC3883) Efficiency and Power Loss vs Input Voltage (LTC3883) Inductor Current at Light Load Start-Up into a Pre-Biased Load Soft-Start Ramp LOAD CURRENT (A) 30 90 100 20 10 80 50 70 60 40 0.01 1 10 100 3883 G01 0 0.1 CCM DCM BM VIN = 12V VOUT = 1.8V fSW = 350kHz L = 0.56µH DCR = 1.8m VIN (V) 5 80 82 84 86 88 90 92 1.0 1.5 2.0 2.5 3.0 3.5 4.0 10 15 20 3883 G03 25 RUN 2V/DIV VOUT 1V/DIV 5ms/DIV tRISE = 10ms tDELAY = 5ms VOUT = 2V 3883 G08 FORCED CONTINUOUS MODE 2A/DIV Burst Mode OPERATION 2A/DIV PULSE-SKIPPING MODE 2A/DIV 1µs/DIV VIN = 12V VOUT = 1.8V ILOAD = 100µA 3883 G07 RUN 2V/DIV VOUT 1V/DIV 5ms/DIV tRISE = 10ms tDELAY = 5ms 3883 G09 LOAD CURRENT (A) 30 90 100 20 10 80 50 70 60 40 0.01 1 10 100 3883 G02 0 0.1 CCM DCM BM VIN = 12V VOUT = 3.3V fSW = 350kHz L = 0.56µH DCR = 1.8m ILOAD 5A/DIV INDUCTOR CURRENT 5A/DIV VOUT 100mV/DIV AC-COUPLED 50µs/DIV VIN = 12V VOUT = 1.8V 0.3A TO 5A STEP 3883 G04 ILOAD 5A/DIV INDUCTOR CURRENT 5A/DIV VOUT 100mV/DIV AC-COUPLED 50µs/DIV VIN = 12V VOUT = 1.8V 0.3A TO 5A STEP 3883 G05 ILOAD 5A/DIV INDUCTOR CURRENT 5A/DIV VOUT 100mV/DIV AC-COUPLED 50µs/DIV VIN = 12V VOUT = 1.8V 0.3A TO 5A STEP 3883 G06 elecTrical characTerisTics less than the minimum endurance specification. The RESTORE_USER_ALL command (NVM read) is valid over the entire operating temperature range. Note 14: The LTC3883-1 quiescent current (IQ) equals the IQ of VIN plus the IQ of EXTVCC. Note 15: The LTC3883 includes 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. |
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Similar Description - LTC3883-1_15 |
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