| SYMBOL | PARAMETER | CONDITIONS | MIN TYP MAX | UNITS |
| VSTBYMD KA | Keep-Alive Power On-Threshold | VSTBYMD Ramping Up, RUNSSl,2 = OV | | 1.5 2 | V |
| DFMAX | Maximum Duty Factor | In Dropout | | 98 99.4 | % |
| IFLTCPL | VFLTCPL Input Current LTC1628 0nly | 0.5V > VFLTCPL INTVcc - 0.5V < VFLTCPL < INTVcc | | -3 3 | c |
| VFLTCPL | Fault Coupling Threshold; LTC1628 0nly | For FCB Signal and Individual Overcurrent Faults to Affect Both Controllers | | 2 | V |
| lRUNSS1 2 | Soft-Start Charge Current | VRUW/SSl, 2 = 1.9V | | 0.5 1.2 | |
| VRUN/SSl, 2 0N | RUN/SS Pin ON Threshold | VRUN/SSl,VRUN/SS2 Rising | | 1.0 1.5 1.9 | V |
| VRUN/SSl,2 LT | RUN/SS Pin Latchoff Arming Threshold | VRUNiSSl,VRUWlSS2 Rising from 3V | | 4.1 4.5 | V |
| ISCLl,2 | RUN/SS Discharge Current | Soft Short Condition VOSENSEl, 2 = 0.5V; VRUN/SSl, 2 = 4.5V | | 0.5 2 4 | |
| lSDLH0 | Shutdown Latch Disable Current | VOSENSEl, 2 = 0.5V | | 1.6 5 | ccA |
| VSENSE(MAX) | Maximum Current Sense Threshold | VOSENSEl, 2 = 0.7V,VSENSEl-, 2- = 5V VOSENSEl, 2 = 0.7V,VSENSEl-, 2- = 5V, LTC1628 0nly | q | 62 75 88 65 75 85 | mV mV |
| TGl, 2 tr TGl, 2 tf | TG Transition Time: Rise Time Fall Time | (Note 5) CLOAD = 3300pF CLOAD = 3300pF | | 50 90 50 90 | ns ns |
| BGl, 2 tr BGl, 2 tf | BG Transition Time: Rise Time Fall Time | (Note 5) CLOAD = 3300pF CLOAD = 3300pF | | 40 90 40 80 | ns ns |
| TG/BG tlD | Top Gate Off to Bottom Gate On Delay Synchronous Switch-On Delay Time | CLOAD = 3300pF Each Driver | | 90 | ns |
| BG/TG t2D | Bottom Gate Off to Top Gate On Delay Top Switch-On Delay Time | CLOAD = 3300pF Each Driver | | 90 | ns |
| LON^lN1 | Minimum On-Time | Tested with a Square Wave (Note 6) | | 180 | ns |
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