Rainbow Electronics MAX8514 - Manual (Page 7)

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 = -40°C to +125°C (Note 2), unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN MAX UNITS
OUT3P (POSITIVE PNP LDO) (MAX8513 ONLY)
DRV3P Operating Range V DRV3P 1 28 V
FB3P Regulation Voltage V DRV3P = 5V, I DRV3P = 1mA 0.780 0.820 V
FB3P to DRV3P Large-Signal
Transconductance
G C3P V DRV3P = 5V, I DRV3P = 0.5mA to 5mA 0.3 1.4 S
Feedback Input Bias Current V FB3P = 0.75V 100 nA
Driver Sink Current V FB3P = 0.75V DRV3P = 2.5V 15 mA
FB3P POR Threshold 0.690 0.742 V
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)
2 mA
FB3N Regulation Voltage
V DRV3N = 1.5V, V SUP3N = 3.5V,
I DRV3N = -1mA (source)
-20 +10 mV
FB3N to DRV3N Large-Signal
Transconductance
G C3N
V DRV3N = 0, I DRV3N = -0.5mA to -5mA
(source)
0.225 0.550 S
Feedback Input Bias Current V FB3N = -100mV 1500 nA
Driver Source Current
V FB3N = 200mV, V DRV3N = 0,
V
SUP3N
= 3.5V
13 mA
FB3N POR Threshold 450 550 mV
REFERENCE
REF Output Voltage V REF -2µA < I REF < +50µA 1.22 1.27 V
OSCILLATOR
R FREQ = 10.7k
Ω
±1% from FREQ to GND 1300 1500
R
FREQ
= 15.0k Ω ±1% from FREQ to GND 917 1070 Frequency f S
R FREQ = 50.0k
Ω
±1% from FREQ to GND 250 335
kHz
R FREQ = 10.7k
Ω
±1% from FREQ to GND 77 91
R FREQ = 15.0k Ω ±1% from FREQ to GND 80 95
Maximum Duty Cycle
(Measured at DH Pin)
R FREQ = 50.0k Ω ±1% from FREQ to GND 93 99
%
Minimum On-Time
(Measured at DH Pin)
R FREQ = 10.7k
Ω
±1% from FREQ to GND 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