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Wide-Input, High-Frequency, Triple-Output Supplies
with Voltage Monitor and Power-On Reset
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V LX = V SUP2 = 12V, V PVL = V BST - V LX = V DRV3P = 5V, V SUP3N = 3.3V, V DRV3N = -5V, C VL = 4.7μF, C REF = 0.22μF, R FREQ =
15.0k ? , T A = -40°C to +125°C (Note 2), unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
OUT1 (BUCK CONVERTER)
Output Voltage Range
FB1 Regulation Threshold
Error-Amplifier Open-Loop
Voltage Gain
FB1 Input Bias Current
DH Output-Resistance High
DH Output-Resistance Low
DL Output-Resistance High
DL Output-Resistance Low
Current-Limit Threshold
(Positive)
V OUT1
V FB1
A VOL
I FB1_BIAS
R DH_HIGH
R DH_LOW
R DL_HIGH
R DL_LOW
V CS
(Note 1)
V FB1 = 1.3V
V ILIM = 2.00V, V CSN = 0 to 5.5V
V ILIM = 0.50V, V CSN = 0 to 5.5V
1.25
1.225
65
-200
243
49
5.50
1.265
+200
2.55
2.1
5
1.3
303
83
V
V
dB
nA
?
?
?
?
mV
V ILIM = V VL , V CSN = 0 to 5.5V
147
190
Current-Limit Threshold
(Negative)
V CS
V ILIM = 2.00V, V CSN = 0 to 5.5V
V ILIM = 0.50V, V CSN = 0 to 5.5V
-333
-90
-199
-42
mV
V ILIM = V VL , V CSN = 0 to 5.5V
-210
-122
CSP and CSN Bias Current
ILIM Bias Current
SS Soft-Start Charge Current
Soft-Start Discharge Resistance
V CSP = V CSN = 0 to 5.5V
V ILIM = 1.25V
V SS = 0.6V
-120
-5.7
15
+135
-4.3
35
200
μA
μA
μA
?
LX, BST, PVL Leakage Current
FB1 Power-On Reset Threshold
V LX = V IN = 28V, V BST = 33V, V PVL = 5V,
V SYNC/EN = 0
1.08
20
1.20
μA
V
OUT2 (POSITIVE LDO)
SUP2 Operating Range
DRV2 Clamp Voltage
V SUP2
V DRV2
(Note 1)
V FB2 = 0.75V
4.5
7.75
28.0
9.00
V
V
SUP2 Supply Current
300
μA
SUP2 Shutdown Supply Current
V SYNC/EN = 0
10
μA
FB2 Regulation Voltage
FB2 Input Bias Current
DRV2 Output Current Limit
V FB2
I FB2_BIAS
V FB2 = 0.75V
V IN = 5V, V DRV2 = 5V, V FB2 = 0.77V
0.775
12
0.816
150
V
nA
mA
DRV2 Output Current Limit
During Soft-Start
FB2 Power-On Reset Threshold
V IN = 6V, V DRV2 = 5V, V FB2 = 0.70V
8
0.690
12
0.742
mA
V
FB2 to DRV2 Transconductance
G C2
I DRV2 = +250μA, -250μA
0.11
0.41
S
6
_______________________________________________________________________________________
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