START-UP REGULATOR |
VCCReg |
VCC Regulation |
Open ckt |
TJ = 25°C |
|
7.7 |
|
V |
full operating junction temperature range |
7.4 |
|
8.0 |
|
VCC Current limit |
See Figure 2 |
TJ = 25°C |
|
17 |
|
mA |
full operating junction temperature range |
10 |
|
|
I-VIN |
Start-up regulator leakage (external VCC supply) |
VIN = 90 V |
TJ = 25°C |
|
150 |
|
µA |
full operating junction temperature range |
|
|
500 |
IIN |
Shutdown current |
SS = 0 V, VCC = open |
TJ = 25°C |
|
250 |
|
µA |
full operating junction temperature range |
|
|
350 |
VCC SUPPLY |
|
VCC Undervoltage lockout voltage |
TJ = 25°C |
|
VCCReg – 100 mV |
|
V |
full operating junction temperature range |
VCCReg – 300 mV |
|
|
|
Undervoltage hysteresis |
TJ = 25°C |
|
1.6 |
|
V |
full operating junction temperature range |
1.2 |
|
2.1 |
ICC |
Supply current |
Cload = 0 |
TJ = 25°C |
|
2 |
|
mA |
full operating junction temperature range |
|
|
3 |
ERROR AMPLIFIER |
GBW |
Gain bandwidth |
|
|
4 |
|
MHz |
|
DC gain |
|
|
75 |
|
dB |
|
Input voltage |
VFB = COMP |
TJ = 25°C |
|
1.245 |
|
V |
full operating junction temperature range |
1.220 |
|
1.270 |
|
COMP sink capability |
VFB = 1.5 V COMP = 1 V |
TJ = 25°C |
|
13 |
|
mA |
full operating junction temperature range |
5 |
|
|
CURRENT LIMIT |
CS1 |
Cycle-by-cyble CS threshold voltage |
TJ = 25°C |
|
0.5 |
|
V |
full operating junction temperature range |
0.45 |
|
0.55 |
CS2 |
Restart CS threshold voltage |
Resets SS capacitor; auto restart |
TJ = 25°C |
|
0.625 |
|
V |
full operating junction temperature range |
0.575 |
|
0.675 |
|
ILIM delay to output |
CS step from 0-V to 0.6-V time-to-onset of OUT transition (90%) Cload = 0 |
|
30 |
|
ns |
|
CS sink current (clocked) |
CS = 0.3 V |
TJ = 25°C |
|
6 |
|
mA |
full operating junction temperature range |
3 |
|
|
SOFT START AND SHUTDOWN |
|
Softstart current source |
TJ = 25°C |
|
10 |
|
µA |
full operating junction temperature range |
7 |
|
13 |
|
Softstart to COMP offset |
TJ = 25°C |
|
0.5 |
|
V |
full operating junction temperature range |
0.25 |
|
0.75 |
|
Shutdown threshold |
TJ = 25°C |
|
0.45 |
|
V |
full operating junction temperature range |
0.2 |
|
0.7 |
OSCILLATOR |
|
Frequency1 (RT = 26.7K) |
TJ = 25°C |
|
200 |
|
kHz |
full operating junction temperature range |
175 |
|
225 |
|
Frequency2 (RT = 8.2K) |
TJ = 25°C |
|
600 |
|
kHz |
full operating junction temperature range |
510 |
|
690 |
|
Sync threshold |
TJ = 25°C |
|
3.2 |
|
V |
full operating junction temperature range |
|
|
3.8 |
PWM COMPARATOR |
|
Delay to output |
COMP set to 2-V CS stepped 0 to 0.4 V, time-to-onset of OUT transition low |
|
30 |
|
ns |
|
Max duty cycle |
Inferred from deadtime |
TJ = 25°C |
|
49% |
|
|
full operating junction temperature range |
47.5% |
|
50% |
|
Min duty cycle |
COMP = 0 V |
full operating junction temperature range |
|
|
0% |
|
|
COMP to PWM comparator gain |
|
|
0.34 |
|
V / V |
|
COMP open circuit voltage |
VFB = 0 V |
TJ = 25°C |
|
5.2 |
|
V |
full operating junction temperature range |
4.3 |
|
6.1 |
|
COMP short circuit current |
VFB = 0 V, COMP = 0 V |
TJ = 25°C |
|
1.1 |
|
mA |
full operating junction temperature range |
0.6 |
|
1.5 |
SLOPE COMPENSATION |
|
Slope comp amplitude |
Delta increase at PWM Comparator to CS |
TJ = 25°C |
|
105 |
|
mV |
full operating junction temperature range |
80 |
|
130 |
OUTPUT SECTION |
|
Deadtime |
Cload = 0, 10% to 10% |
TJ = 25°C |
|
135 |
|
ns |
full operating junction temperature range |
85 |
|
185 |
|
Output high saturation |
Iout = 50 mA, VCC – VOUT |
TJ = 25°C |
|
0.25 |
|
V |
full operating junction temperature range |
|
|
0.75 |
|
Output low saturation |
IOUT = 100 mA |
TJ = 25°C |
|
0.25 |
|
V |
full operating junction temperature range |
|
|
0.75 |
|
Rise time |
Cload = 1 nF |
|
16 |
|
ns |
|
Fall time |
Cload = 1 nF |
|
16 |
|
ns |
THERMAL SHUTDOWN |
Tsd |
Thermal shutdown temperature |
|
|
165 |
|
°C |
|
Thermal shutdown hysteresis |
|
|
15 |
|
°C |