| VOLTAGE REFERENCE |
| VFB |
Feedback voltage |
COMP = FB, TA = 25°C |
689 |
696 |
702 |
mV |
| 4.5 < VDD < 52 |
TA = 25°C |
686 |
696 |
703 |
| –40°C < TA < 85°C |
679 |
696 |
708 |
| –40°C < TA < 125°C |
679 |
696 |
710 |
| GATE DRIVER |
| Isrc |
Gate driver pull-up current |
|
125 |
300 |
|
mA |
| Isnk |
Gate driver pull-down current |
|
200 |
300 |
|
mA |
| VGATE |
Gate driver output voltage |
VGATE = (VDD – VGDRV), for 12 < VDD < 52 |
6 |
8 |
10 |
V |
| QUIESCENT CURRENT |
|
| Iqq |
Device quiescent current |
fOSC = 300 kHz, Driver not switching, 4.5 < VDD < 52 |
|
1.5 |
3.0 |
mA |
| UNDERVOLTAGE LOCKOUT (UVLO) |
| VUVLO(on) |
Turn-on threshold |
–40°C < TA < 125°C |
3.8 |
4.25 |
4.5 |
V |
| VUVLO(off) |
Turn-off threshold |
|
|
4.05 |
|
| VUVLO(HYST) |
Hysteresis |
|
|
110 |
200 |
275 |
mV |
| SOFT-START |
| RSS(chg) |
Internal soft-start pull-up resistance |
|
65 |
105 |
170 |
kΩ |
| RSS(dchg) |
Internal soft-start pull-down resistance |
|
190 |
305 |
485 |
| VSSRST |
Soft-start reset threshold |
|
|
100 |
150 |
200 |
mV |
| OVERCURRENT PROTECTION |
| VILIM |
Overcurrent threshold |
4.5 < VDD < 52 |
0°C < TA < 125°C |
65 |
100 |
140 |
mV |
| –40°C < TA < 125°C |
55 |
100 |
140 |
| OCDF |
Overcurrent duty cycle(1) |
|
|
|
2% |
|
| VILIM(rst) |
Overcurrent reset threshold |
|
|
100 |
150 |
200 |
mV |
| OSCILLATOR |
|
| fOSC |
Oscillator frequency range(1) |
|
35 |
|
500 |
kHz |
| Oscillator frequency |
RRC = 200 kΩ, CRC = 470 pF |
85 |
100 |
115 |
| RRC = 68.1 kΩ, CRC = 470 pF |
255 |
300 |
345 |
|
Frequency line regulation |
12 V < VDD < 52 V |
-9% |
|
0% |
|
| 4.5 V < VDD < 12 V |
–20% |
|
0% |
| VRMP |
Ramp amplitude |
4.5 V < VDD < 52 V |
|
VDD÷10 |
|
V |
| PULSE WIDTH MODULATOR |
|
| tMIN |
Minimum controllable pulse width(2) |
VDD = 12 V |
|
200 |
400 |
ns |
| VDD = 30 V |
|
100 |
200 |
| DMAX |
Maximum duty cycle |
fosc = 100 kHz, CL = 470 pF |
93% |
95% |
|
|
| fosc = 300 kHz, CL = 470 pF |
90% |
93% |
|
| KPWM |
Modulator and power stage DC gain |
|
8 |
10 |
12 |
V/V |
| ERROR AMPLIFIER |
|
| IIB |
Input bias current |
|
|
100 |
250 |
nA |
| AOL |
Open loop gain(1) |
|
60 |
80 |
|
dB |
| GBWP |
Unity gain bandwidth(1) |
|
1.5 |
3 |
|
MHz |
| ICOMP(src) |
Output source current |
VFB = 0.6 V, COMP = 1 V |
100 |
250 |
|
μA |
| ICOMP(snk) |
Output sink current |
VFB = 1.2 V, COMP = 1 V |
1.0 |
2.5 |
|
mA |