UCD7100
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SLUS651C –MARCH 2005–REVISED MAY 2010
RECOMMENDED OPERATING CONDITIONS
PARAMETER
MIN
4.25
1
TYP
MAX UNIT
Supply Voltage, VDD
12
14.5
V
Supply bypass capacitance
µF
°C
Reference bypass capacitance
Operating junction temperature
0.22
-40
105
ELECTRICAL CHARACTERISTICS
VDD = 12 V, 4.7-µF capacitor from VDD to GND, TA = TJ = -40°C to 105°C, (unless otherwise noted).
PARAMETER
SUPPLY SECTION
TEST CONDITIONS
MIN
TYP
MAX UNIT
Supply current, OFF
Supply current
VDD = 4.2 V
Outputs not switching IN = LOW
200
1.5
400
2.5
µA
mA
LOW VOLTAGE UNDER-VOLTAGE LOCKOUT
VDD UVLO ON
4.25
4.05
150
4.5
4.25
250
4.75
4.45
350
V
VDD UVLO OFF
VDD UVLO hysteresis
mV
REFERENCE / EXTERNAL BIAS SUPPLY
3V3 initial set point
3V3 over temperature
3V3 load regulation
3V3 line regulation
Short circuit current
3V3 OK threshold, ON
3V3 OK threshold, OFF
INPUT SIGNAL
TA = 25°C
3.267
3.234
3.3
3.3
1
3.333
3.366
6.6
V
ILOAD = 1 mA to 10 mA, VDD = 5 V
VDD = 4.75 V to 12 V, ILOAD = 10 mA
VDD = 4.75 to 12 V
mV
mA
V
1
6.6
11
2.9
2.7
20
3.0
2.8
35
3.3 V rising
3.1
3.3 V falling
2.9
HIGH, positive-going input threshold
voltage (VIT+)
1.65
1.16
0.6
2.08
1.5
LOW negative-going input threshold
voltage (VIT-)
V
Input voltage hysteresis, (VIT+ -
VIT-)
0.8
2
Frequency
MHz
CURRENT LIMIT (ILIM)
ILIM internal current limit threshold
ILIM = OPEN
0.466
0.975
0.700
0.21
0.50
1.025
0.725
0.23
0.536
1.075
0.750
0.25
V
V
ILIM maximum current limit threshold ILIM = 3.3 V
ILIM current limit threshold ILIM = 0.75 V
ILIM minimum current limit threshold ILIM = 0.25 V
mV
V
CLF output high level
CS > ILIM , ILOAD = -7 mA
2.64
CLF output low level
CS ≤ ILIM, ILOAD = 7 mA
0.66
20
Propagation delay from IN to CLF
IN rising to CLF falling after a current limit event
10
ns
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