LGA C Series Data Sheet
aꢆꢆꢁꢅꢈꢇꢄꢅon eqꢂꢇꢄꢅons
Setting Output Voltage
Default output voltage: 0.591 V
Setting Margin Control
To margin the output up, pull the margin control pin high. To
margin down, pull the margin control pin low. If the pin is left
floating, the feature is disabled. The maximum margining range is
33% of the oputput default voltage setting, with maximum
output at 5.5 V
The outut voltage may be adjusted with a resistor placed
between the "Trim" and "-Sense" pin.
The formula for calcuating the value of this resistor is:
R
R
+ ꢀk
trim
margin
V
= 0.118ꢀ
*
margin_up
*
R
+
R
R
(kΩ) =
1.18ꢀ
- 0.591
ofs
trim
trim
V
out
R
R
+ ꢀk
trim
R
trim
margin
V
= 0.118ꢀ
margin_down
*
*
R
-
See Technical Reference Note for other trimming methods.
ofs
Setting Under Voltage Lock Out
– 3, 6, 10 A Models
Setting Under Voltage Lock Out
– 20 A Models
Default Turn-on voltage: 4.3 V (300 mV Hysteresis)
Default Turn-on voltage: ꢀ.9 V (300 mV Hysteresis)
The Turn-on voltage may be adjusted with a resistor placed
between the “Enable” and “Ground” pins.
The Turn-on voltage may be adjusted with a resistor placed
between the “Enable” and “Ground” pins.
The formula for calculating the value of this resistor is:
The formula for calculating the value of this resistor is:
R
(kΩ) =
30.1 4.ꢀꢀ
*
R
(kΩ) =
14.81 6.81
*
uvlo
uvlo
(8.577
V
) - 34.3ꢀ
(6.81
V
) - 18.16
Turn_on
*
Turn_on
*
*ONLY USE WITH OPEN COLLECTOR DEVICE
*DO NOT DRIVE PIN WITH A VOLTAGE
*ONLY USE WITH OPEN COLLECTOR DEVICE
*DO NOT DRIVE PIN WITH A VOLTAGE
Notes:
1. Measured as per recommended minimum system capacitance.
2. di/dt = 10 A/ µs,12 Vin = Norm, Tc = 25 °C, load change = 50% lo 100% Imax.
3. Internal input capacitance is rated 16 Vdc maximum.
R
R
ofs+
ofs-
R
margin
Margin Control
Enable On/Off
Power Good
23
21
12
13 22
V
out
1-4
15
LGA C Series
+Sense
R
uvlo
R
V
in
L
C
9-10
5-8
out
O
A
D
14
24
C
R
in
trim
-Sense
GND
GND
External input fusing is recommended.