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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 = 0°C to +85°C , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUT3N (NEGATIVE NPN LDO CONTROLLER) (MAX8514 ONLY)
SUP3N Operating Range
DRV3N Operating Range
SUP3N Supply Current
(Note 1)
(Note 1)
V DRV3N = 1.5V, V SUP3N = 3.5V,
I DRV3N = -1mA (source)
1.5
V SUP3N
- 21V
1.1
5.5
V SUP3N
- 1.5V
2
V
V
mA
FB3N Regulation Voltage
V DRV3N = 1.5V, V SUP3N = 3.5V,
I DRV3N = -1mA (source)
-20
-5
+10
mV
FB3N to DRV3N Large-Signal
Transconductance
Feedback Input Bias Current
Driver Source Current
FB3N POR Threshold
G C3N
V DRV3N = 0, I DRV3N = -0.5mA to -5mA
(source)
V FB3N = -100mV
V FB3N = 200mV, V DRV3N = 0,
V SUP3N = 3.5V
0.225
13
450
0.36
60
25
500
0.550
1000
550
S
nA
mA
mV
FB3N Soft-Start Period
REFERENCE
2048
Clock
Cycles
REF Output Voltage
V REF
-2μA < I REF < +50μA
1.231
1.25
1.269
V
OSCILLATOR
R FREQ = 10.7k ? ±1% from FREQ to GND
1300
1390
1460
Frequency
f S
R FREQ = 15.0k ? ±1% from FREQ to GND
933
985
1040
kHz
FREQ Resistance-Frequency
Product
R FREQ = 50.0k ? ±1% from FREQ to GND
260
290
15.0
324
MHz
× k ?
Maximum Duty Cycle
(Measured at DH Pin)
Minimum On-Time
(Measured at DH Pin)
SYNC/EN Pulse Width
R FREQ = 10.7k ? ±1% from FREQ to GND
R FREQ = 15.0k ? ±1% from FREQ to GND
R FREQ = 50.0k ? ±1% from FREQ to GND
R FREQ = 10.7k ? ±1% from FREQ to GND
Low or high (Note 1)
77
80
93
200
83
87
96
20
91
95
99
62
%
ns
ns
SYNC/EN input frequency needs to be
SYNC/EN Frequency Range
within ±30% of the value set at the FREQ
200
1850
kHz
pin (Note 1)
SYNC/EN Input Voltage, High
SYNC/EN Input Voltage, Low
2.4
0.8
V
V
SYNC/EN Input Current
V SYNC/EN = 0 to 5.5V
-1
+1
μA
4
_______________________________________________________________________________________
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