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LTC4231 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4231 Datasheet(HTML) 3 Page - Linear Technology |
3 / 20 page LTC4231 3 4231f For more information www.linear.com/LTC4231 elecTrical characTerisTics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. IN = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IN VIN Input Supply Voltage Range l 2.7 36 V VIN(UVL) Input Supply Undervoltage Lockout IN Rising l 2 2.3 2.6 V ∆VIN(HYST) Input Supply Undervoltage Lockout Hysteresis 200 mV ICC Supply Current (Average) Normal On, Voltage or Current Fault Start-Up or Overcurrent Shutdown Reverse Input (Note 5) IGATE ≤ –0.1µA, CGATE-SOURCE = 1nF SHDN Low, GATE Pulled to GND IN, SENSE = –40V l l l l 4 300 0.3 –2.5 10 600 1 –5 µA µA µA mA SENSE ∆VSENSE(CB) Circuit Breaker Threshold (VIN – VSENSE) l 47 50 53 mV ∆VSENSE(ACL) Analog Current Limit During Output Short-Circuit l 65 80 90 mV ISENSE SENSE Input Current SHDN = High, SENSE = 12V l 0.3 1 µA GATE, SOURCE ∆VGATE External N-Channel Gate Drive (VGATE – VSOURCE) VIN < 7V, IGATE = 0, –0.1µA VIN ≥ 7V, IGATE = 0, –0.1µA l l 4.5 10 6.2 11.4 10 18 V V ∆VGATE(H) ∆VGATE (VGATE – VSOURCE) Threshold That Deactivates the Charge Pump VIN < 7V VIN ≥ 7V l l 5.5 11 6.5 11.7 10 18 V V VGATE(L) GATE Low Threshold To Enter Shutdown or Voltage Fault l 0.5 1.2 1.8 V IGATE(UP) GATE Pull-Up Current GATE On, GATE = 1V l –8 –10 –12 µA IGATE(FAST) GATE Fast Pull-Down Current ∆VSENSE = 0.5V, ∆VGATE = 5V l 70 130 mA IGATE(SLOW) GATE Slow Pull-Down Current SHDN = 0V, ∆VGATE = 5V l 0.6 1 mA tD(ON) Turn-On Debounce Delay UVL = UVH = 2V, OV = 0V, SHDN = Step 0V to 5V l 26 40 54 ms tRETRY Auto-Retry Delay LTC4231-2 l 0.325 0.5 0.675 s tPHL(ILIM) Overcurrent to GATE Low Propagation Delay ∆VSENSE = Step 0mV to 300mV, CGATE = 1nF, ∆VGATE Crosses 1V l 0.5 1 µs UVL, UVH, OV, GNDSW VUV UVL, UVH Threshold l 0.776 0.795 0.814 V VOV OV Threshold OV Rising l 0.776 0.795 0.814 V VOV(HYST) OV Hysteresis l 3 15 30 mV IUVOV(LEAK) UVL, UVH and OV Leakage Current V = 0.9V V = 12V l l 0 0 ±10 ±100 nA nA RON(GNDSW) Switch Resistance l 80 200 Ω IGNDSW(LEAK) GNDSW Leakage Current GNDSW =12V l 0 ±100 nA tPERIOD Sampling Period l 6.5 10 13.5 ms tSAMPLE Sampling Width l 130 200 270 µs |
Similar Part No. - LTC4231_15 |
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Similar Description - LTC4231_15 |
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