| Parameter | Symbol | Condition | Min | Typ. | Max | Unit |
| UVLO SECTION |
| Start threshold voltage | VSTART | | 14 | 15 | 16 | V |
| Stop threshold voltage | VSTOP | After turn on | 9 | 10 | 11 | V |
| OSCILLATOR SECTION |
| Initial accuracy | FOSC | Ta=25IC | 18 | 20 | 22 | kHz |
| Frequency change with temperature (2) | | | _25IC" Ta"+85IC | | +5 | +10 | % |
| Maximum duty cycle | Dmax | | 92 | 95 | 98 | % |
| FEEDBACK SECTION |
| Feedback source current | IFB | Ta=25IC, Vfb=GND | 0.7 | 0.9 | 1.1 | mA |
| Shutdown Feedback voltage | VSD | | 6.9 | 7.5 | 8.1 | V |
| Shutdown delay current | ldelay | Ta=25IC, 5V"Vfb"VSD | 1.4 | 1.8 | 2.2 | o |
| SYNC. & SOFT START SECTION |
| Soft start voltage | VSS | VFB=2V | 4.7 | 5.0 | 5.3 | V |
| Soft start current | ISS | Sync & S/S=GND | 0.8 | 1.0 | 1.2 | mA |
| Sync threshold voltage (3) | VSYTH | Vfb=5V | 6.0 | 6.4 | 6.8 | V |
| REFERENCE SECTION |
| Output voltage (i) | Vref | Ta=25IC | 4.80 | 5.00 | 5.20 | V |
| Temperature Stability (i)(2) | Vref/Cir | -25IC" Ta" +85IC | | 0.3 | 0.6 | mV/IC |
| CURRENT LIMIT (SELF-PROTECTION) SECTION |
| Peak Current Limit | lOVER | Max. inductor current | 4.40 | 5.00 | 5.60 | A |
| PROTECTION SECTION |
| Thermal shutdown temperature (Tj) (i) | TSD | | 140 | 160 | | IC |
| Over voltage protection voltage | VOVP | | 23 | 25 | 28 | V |
| TOTAL DEVICE SECTION |
| Start Up current | ISTART | VCC=14V | 0.1 | 0.3 | 0.55 | mA |
| Operating supply current (control part only) | IOP | Ta=25IC | 6 | 12 | 18 | mA |
| VCC zener voltage | VZ | ICC=20mA | 30 | 32.5 | 35 | V |
| | | | | | |
Setting a Lower VTRIP Voltage In order to set VTRIP to a lower voltage than the present value, then VTRIP must first be "reset" accord- ing to the procedure described below. Once VTRIP has been "reset", then VTRIP can be set to the desired volt- age using the procedure described in "Setting a Higher VTRIP Voltage".
TMS4C1025D1 on stock| lPARAMETER | SYMBOL | MIN | MAX | UNITS |
| Forward Current | IF | 50 | 200 | mA |
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