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LTC3883 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3883 Datasheet(HTML) 5 Page - Linear Technology |
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5 / 112 page  LTC3883/LTC3883-1 5 3883fb For more information www.linear.com/LTC3883 elecTrical characTerisTics The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN = 12V, VRUN = 3.3V, fSYNC = 500kHz (externally driven) unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage VIN Input Voltage Range (Note 12) l 4.5 24 V IQ Input Voltage Supply Current Normal Operation (Note 14) VRUN = 3.3V, No Caps on TG and BG VRUN = 0V 30 20 mA mA VUVLO Undervoltage Lockout Threshold when VIN > 4.2V VINTVCC/VEXTVCC Falling VINTVCC/VEXTVCC Rising 3.7 3.95 V V TINT Initialization Time from VIN Applied Until the TON_DELAY Timer Starts 145 ms Control Loop VOUTR0 Full-Scale Voltage Range 0 Set Point Accuracy (0.6V to 5V) Resolution LSB Step Size VOUT_COMMAND = 5.500V (Note 9) l l 5.422 –0.5 12 1.375 5.576 0.5 V % Bits mV VOUTR1 Full-Scale Voltage Range 1 Set Point Accuracy (0.6V to 2.5V) Resolution LSB Step Size VOUT_COMMAND = 2.75V (Note 9) l l 2.711 –0.5 12 0.6875 2.788 0.5 V % Bits mV VLINEREG Line Regulation 6V < VIN < 24V l ±0.02 %/V VLOADREG Load Regulation ∆VITH = 1.35V – 0.7V ∆VITH = 1.35V – 2.0V l l 0.01 –0.01 0.1 –0.1 % % gm Error Amplifier gm ITH =1.22V 3 mmho IISENSE Input Current VISENSE = 5.5V l ±1 ±2 µA VSENSERIN VSENSE Input Resistance to Ground 0V ≤ VPIN ≤ 5.5V 47 kΩ VIlLIMIT Resolution 3 bits VILIMMAX Hi Range Lo Range l l 68 44 75 50 82 56 mV mV VILIMMIN Hi Range Lo Range 37.5 25 mV mV Gate Driver TG tr tf TG Transition Time: Rise Time Fall Time (Note 4) CLOAD = 3300pF CLOAD = 3300pF 30 30 ns ns BG tr tf BG Transition Time: Rise Time Fall Time (Note 4) CLOAD = 3300pF CLOAD = 3300pF 20 20 ns ns TG/BG t1D Top Gate Off to Bottom Gate On Delay Time (Note 4) CLOAD = 3300pF 10 ns BG/TG t2D Bottom Gate Off to Top Gate On Delay Time (Note 4) CLOAD = 3300pF 30 ns tON(MIN) Minimum On-Time 90 ns OV/UV Output Voltage Supervisor N Resolution 8 bits VRANGE0 Voltage Range Range Value = 0 1 5.5 V VRANGE1 Voltage Range Range Value = 1 0.4 2.7 V VOUSTP0 Step Size Range Value = 0 22 mV VOUSTP1 Step Size Range Value = 1 11 mV VTHACC0 Threshold Accuracy 2V < VOUT < 5V Range Value = 0 l ±2 % VTHACC1 Threshold Accuracy 0.9V < VOUT < 2.5V Range Value = 1 l ±2 % tPROPOV1 OV Comparator to GPIO Low Time VOD = 10% of Threshold 35 µs tPROPUV1 UV Comparator to GPIO Low Time VOD = 10% of Threshold 35 µs |
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