Rainbow Electronics MAX8514 - Manual (Page 4)

MAX8513/MAX8514
Wide-Input, High-Frequency, Triple-Output Supplies
with Voltage Monitor and Power-On Reset
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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 =
15.0kΩ, 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 (Note 1) 1.5 5.5 V
DRV3N Operating Range (Note 1)
V SUP3N
- 21V
V SUP3N
- 1.5V
V
SUP3N Supply Current
V DRV3N = 1.5V, V SUP3N = 3.5V,
I DRV3N = -1mA (source)
1.1 2 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
G C3N
V DRV3N = 0, I DRV3N = -0.5mA to -5mA
(source)
0.225 0.36 0.550 S
Feedback Input Bias Current V FB3N = -100mV 60 1000 nA
Driver Source Current
V FB3N = 200mV, V DRV3N = 0,
V SUP3N = 3.5V
13 25 mA
FB3N POR Threshold 450 500 550 mV
FB3N Soft-Start Period 2048
Clock
Cycles
REFERENCE
REF Output Voltage V REF -2µA < I REF < +50µA 1.231 1.25 1.269 V
OSCILLATOR
R FREQ = 10.7k
Ω
±1% from FREQ to GND 1300 1390 1460
R FREQ = 15.0k
Ω
±1% from FREQ to GND 933 985 1040 Frequency f S
R FREQ = 50.0k
Ω
±1% from FREQ to GND 260 290 324
kHz
FREQ Resistance-Frequency
Product
15.0
MHz
× k Ω
R FREQ = 10.7k
Ω
±1% from FREQ to GND 77 83 91
R
FREQ
= 15.0k Ω ±1% from FREQ to GND 80 87 95
Maximum Duty Cycle
(Measured at DH Pin)
R FREQ = 50.0k Ω ±1% from FREQ to GND 93 96 99
%
Minimum On-Time
(Measured at DH Pin)
R FREQ = 10.7k
Ω
±1% from FREQ to GND 20 62 ns
SYNC/EN Pulse Width Low or high (Note 1) 200 ns
SYNC/EN Frequency Range
SYNC/EN input frequency needs to be
within ±30% of the value set at the FREQ
pin (Note 1)
200 1850 kHz
SYNC/EN Input Voltage, High 2.4 V
SYNC/EN Input Voltage, Low 0.8 V
SYNC/EN Input Current V
SYNC/EN
= 0 to 5.5V -1 +1 µA