SUPPLY SECTION |
|
Supply current, OFF |
VDD = 4.2 V |
|
300 |
500 |
µA |
|
Supply current, ON |
Outputs not switching, CLK = low |
1.6 |
|
3 |
mA |
LOW VOLTAGE UNDERVOLTAGE LOCKOUT |
|
VDD UVLO ON |
|
4.25 |
4.5 |
4.75 |
V |
|
VDD UVLO OFF |
|
4.05 |
4.25 |
4.45 |
V |
|
VDD UVLO hysteresis |
|
150 |
250 |
350 |
mV |
REFERENCE / EXTERNAL BIAS SUPPLY |
|
3V3 initial set point |
TA = 25°C, ILOAD = 0 |
3.267 |
3.3 |
3.333 |
V |
|
3V3 set point over temperature |
|
3.234 |
3.3 |
3.366 |
V |
|
3V3 load regulation |
ILOAD = 1 mA to 10 mA, VDD = 5 V |
|
1 |
6.6 |
mV |
|
3V3 line regulation |
VDD = 4.75 V to 12 V, ILOAD = 10 mA |
|
1 |
6.6 |
mV |
|
Short circuit current |
VDD = 4.75 to 12 V |
9 |
20 |
35 |
mA |
|
3V3 OK threshold, ON |
3.3 V rising |
2.9 |
3.0 |
3.1 |
V |
|
3V3 OK threshold, OFF |
3.3 V falling |
2.7 |
2.8 |
2.9 |
V |
CLOCK INPUT (CLK) |
VIT+ |
HIGH, positive-going input threshold voltage |
|
1.65 |
|
2.08 |
V |
VIT– |
LOW negative-going input threshold voltage |
|
1.16 |
|
1.5 |
V |
(VIT+) – (VIT–) |
Input voltage hysteresis |
|
0.6 |
|
0.8 |
V |
|
Frequency |
OUTx = 1 MHz |
|
|
2 |
MHz |
SLOPE COMPENSATION (ISET) |
|
ISET Voltage |
VISET , 3V3 = 3.3 V, ±2% |
1.78 |
1.84 |
1.90 |
V |
m |
VSLOPE (I-Mode) |
RISET = 6.19 kΩ to AGND, CS = 0.25 V, CTRL = 2.5 V |
1.48 |
2.12 |
2.76 |
V/µs |
RISET = 100 kΩ to AGND, CS = 0.25 V, CTRL = 2.5 V |
0.099 |
0.142 |
0.185 |
RISET = 499 kΩ to AGND, CS = 0.25 V, CTRL = 2.5 V |
0.019 |
0.028 |
0.037 |
m |
VSLOPE (V-Mode) |
RISET = 4.99 kΩ to 3V3, CTRL = 2.5 V |
1.44 |
2.06 |
2.68 |
V/µs |
RISET = 100 kΩ to 3V3, CTRL = 2.5 V |
0.068 |
0.114 |
0.148 |
RISET = 402 kΩ to 3v3, CTRL = 2.5 V |
0.016 |
0.027 |
0.035 |
|
ISET resistor range |
Current mode control; RISET connected to AGND |
6.19 |
|
499 |
kΩ |
|
ISET resistor range |
Voltage mode control; RISET connected to 3V3 |
4.99 |
|
402 |
kΩ |
|
ISET current range |
Voltage mode control with Feed-Forward; RISET connected to VIN |
3.7 |
|
300 |
μA |
PWM |
|
PWM offset at CTRL input |
3V3 = 3.3 V ±2% |
0.45 |
0.51 |
0.6 |
V |
|
CTRL buffer gain(1) |
Gain from CTRL to PWM comparator input |
|
0.5 |
|
V/V |
CURRENT LIMIT (ILIM) |
|
ILIM internal current limit threshold |
ILIM = OPEN |
0.466 |
0.5 |
0.536 |
V |
|
ILIM maximum current limit threshold |
ILIM = 3.3 V |
0.975 |
1.025 |
1.075 |
V |
|
ILIM current limit threshold |
ILIM = 0.75 V |
0.700 |
0.725 |
0.750 |
V |
|
ILIM minimum current limit threshold |
ILIM = 0.25 V |
0.2 |
0.23 |
0.25 |
V |
|
CLF output high level |
CS > ILIM , ILOAD = –7 mA |
2.64 |
|
|
V |
|
CLF output low level |
CS ≤ ILIM, ILOAD = 7 mA |
|
|
0.66 |
V |
CURRENT SENSE COMPARATOR |
|
Bias voltage |
Includes CS comp offset |
5 |
25 |
50 |
mV |
|
Input bias current |
|
|
–1 |
|
μA |
CURRENT SENSE DISCHARGE TRANSISTOR |
|
Discharge resistance |
CLK = low, resistance from CS to AGND |
10 |
35 |
75 |
Ω |
OUTPUT DRIVERS |
|
Source current(1) |
VDD = 12 V, CLK = high, OUTx = 5 V |
|
4 |
|
A |
|
Sink current(1) |
VDD = 12 V, CLK = low, OUTx = 5 V |
|
4 |
|
A |
|
Source current(1) |
VDD = 4.75 V, CLK = high, OUTx = 0 |
|
2 |
|
A |
|
Sink current(1) |
VDD = 4.75 V, CLK = low, OUTx = 4.75 V |
|
3 |
|
A |
|
Output with VDD < UVLO |
VDD = 1.0 V, ISINK = 10 mA |
|
0.8 |
1.2 |
V |