FAN5038 Datasheet, PDF (5/15 Pages) Fairchild Semiconductor – Dual Voltage Controller for DSP Power

FAN5038
PRODUCT SPECIFICATION
Electrical Characteristics—Linear Regulator
(VCCA = 5V, VCCL = 12V, TA = 25°C using circuit in Figure 1, unless otherwise noted)
The • denotes specifications which apply over the full ambient operating temperature range.
Parameter
Output Voltage, VOL¹
Setpoint Accuracy²
Conditions
Set by external resistors
IL=0.5A, using 0.1% resistors
Min
• 1.5
-1.5
Output Temperature Drift
•
Line Regulation
VCCL = 11.4V to 12.6V, IL = 0.5A
Load Regulation
IL = 0 to 5A
Output Noise
0.1 to 20KHz
Cumulative DC Accuracy³
•
Crosstalk⁴
ISW = 4A
Short Circuit Comparator
Threshold
•
40
Op-amp Output Current
Open Loop
50
Typ
40
0.1
±0.7
1
±1.7
35
50
70
Max
3.6
+1.5
0.15
±1
±3
60
Units
V
%
ppm
%Vo
%Vo
mV
%
mVpp
mV
mA
Notes:
1. When the LIN_EN pin is LOW, the linear regulator output is set with external resistors. When the LIN_EN pin is HIGH, the
linear regulator is disabled and will exhibit no output voltage. Please refer to the Application Section for output voltage
selection information.
2. Setpoint accuracy is the initial output voltage variability under the specified conditions. The matching of the external resistors
will have a major influence on this parameter.
3. Cumulative DC accuracy includes setpoint accuracy, temperature drift, line and load regulation.
4. Crosstalk is defined as the amount of switching noise from the switch-mode regulator that appears on the output of the linear
regulator when both outputs are in a static load condition.
Electrical Characteristics—Common
(VCCA = 5V, VCCL = 12V, TA = 25°C using circuit of Figure 1, unless otherwise noted)
The • denotes specifications which apply over the full ambient operating temperature range.
Parameter
Reference Voltage, VREF
VREF PSRR
VCCA Supply Current
VCCP Supply Current
VCCL Supply Current
Conditions
Independent of load
ISW = 4A
IL = 2A
Min
Typ
Max Units
1.485
1.5
1.515
V
60
dB
•
5
15
mA
•
20
25
mA
•
5
mA
5
REV. 1.0.2 7/6/00