UCC28019
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SLUS755–APRIL 2007
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, VCC = 15 VDC, 0.1 µF from VCC to GND, -40°C ≤ TJ = TA ≤ 125°C. All voltages are with respect to
GND. Currents are positive into and negative out of the specified terminal.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VCC Bias Supply
IVCC(start)
Pre-start current
Standby current
Operating current
VCC = VCCON– 0.1 V
25
100
200
µA
IVCC(stby)
VSENSE = 0.5 V
1.0
4
2.1
7
2.9
10
mA
IVCC(on_load)
VSENSE = 4.5 V, CGATE = 4.7 nF
Under Voltage Lockout (UVLO)
VCCON
VCCOFF
UVLO
Turn on threshold
10.0
9
10.5
9.5
11.0
10
Turn off threshold
Hysteresis
V
0.8
1.0
1.2
Oscillator
TA = 25°C
61.7
59
65.0
65
68.3
71
fSW
Switching frequency,
kHz
– 40°C ≤ TA ≤ 125°C
PWM
VCOMP = 0 V, VSENSE = 5 V,
ICOMP = 6.4 V
DMIN
Minimum duty cycle
0%
DMAX
Maximum duty cycle
Minimum off time
VSENSE = 4.95 V
94%
100
97%
250
99.3%
600
tOFF(min)
VSENSE = 3 V, ICOMP = 1 V
ns
System Protection
ISENSE threshold, soft over current
(SOC) ,
VSOC
VPCL
VOLP
-0.66
-1.00
0.77
-0.73
-1.08
0.82
100
-0.79
-1.15
0.86
250
ISENSE threshold, peak current Limit
(PCL) ,
V
VSENSE threshold, open loop
protection (OLP),
ICOMP = 1 V, ISENSE = 0 V,
VCOMP = 1 V
Open loop protection (OLP) internal
pull-down current
VSENSE = 0.5 V
nA
VSENSE threshold, output
under-voltage detection (UVD),
VUVD
4.63
5.12
0.76
1.4
4.75
5.25
0.82
4.87
5.38
0.88
VSENSE threshold, output
over-voltage protection (OVP),
VOVP
ISENSE = -0.2 V
V
Input brown-out detection (IBOP)
high-to-low threshold
VINSBROWNOUT_th
Input brown-out Detection (IBOP)
low-to-high threshold
VINSENABLE_th
IVINS_0 V
1.5
0
1.6
VINS bias current
VINS = 0 V
±0.1
µA
V
ICOMP threshold, external overload
protection
0.6
3
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