SYSTEM PARAMETERS |
ENABLE CONTROL |
VEN |
EN threshold |
VEN rising |
|
|
1.274 |
|
V |
over the junction temperature (TJ) range of –40°C to +125°C |
1.096 |
|
1.452 |
IEN-HYS |
EN hysteresis source current |
VEN > 1.274 V |
|
13 |
|
µA |
SOFT-START |
ISS |
SS source current |
VSS = 0V |
|
|
50 |
|
µA |
over the junction temperature (TJ) range of –40°C to +125°C |
40 |
|
60 |
tSS |
Internal soft-start interval |
|
|
1.6 |
|
ms |
CURRENT LIMIT |
ICL |
Current limit threshold |
DC average |
12.5 |
|
|
A |
INTERNAL SWITCHING OSCILLATOR |
fosc |
Free-running oscillator frequency |
|
314 |
359 |
404 |
kHz |
REGULATION AND OVERVOLTAGE COMPARATOR |
VFB |
In-regulation feedback voltage |
VSS >+ 0.8 V IO = 10 A |
|
|
0.795 |
|
V |
over the junction temperature (TJ) range of –40°C to +125°C |
0.775 |
|
0.815 |
VFB-OV |
Feedback overvoltage protection threshold |
|
|
0.86 |
|
V |
IFB |
Feedback input bias current |
|
|
5 |
|
nA |
IQ |
Non-switching quiescent current |
|
|
3 |
|
mA |
ISD |
Shutdown quiescent current |
VEN = 0 V |
|
32 |
|
μA |
Dmax |
Maximum duty factor |
|
|
85% |
|
|
THERMAL CHARACTERISTICS |
TSD |
Thermal shutdown |
Rising |
|
165 |
|
°C |
TSD-HYST |
Thermal shutdown hysteresis |
Falling |
|
15 |
|
°C |
PERFORMANCE PARAMETERS(4) |
ΔVO |
Output voltage ripple |
BW at 20 MHz |
|
24 |
|
mVPP |
ΔVO/ΔVIN |
Line regulation |
VIN = 12 V to 20 V, IOUT= 10 A |
|
±0.2% |
|
|
ΔVO/ΔIOUT |
Load regulation |
VIN = 12 V, IOUT= 0.001 A to 10 A |
|
1 |
|
mV/A |
η |
Peak efficiency |
VIN = 12 V VOUT = 3.3 V, IOUT = 5 A |
|
89.5% |
|
|
η |
Full load efficiency |
VIN = 12 V, VOUT = 3.3 V, IOUT = 10 A |
|
87.5% |
|
|