Datasheet

10
LT1763 Series
1763fa
TYPICAL PERFORMANCE CHARACTERISTICS
UW
LT1763-5
Transient Response
C
BYP
= 0
LT1763-5
Transient Response
C
BYP
= 0.01µF
TIME (µs)
0.4
0.2
0
–0.2
–0.4
OUTPUT VOLTAGE
DEVIATION (V)
600
400
200
0
LOAD CURRENT
(mA)
1763 G48
0 200
400
600 800 1000
V
IN
= 6V
C
IN
= 10µF
C
OUT
= 10µF
TIME (µs)
0.10
0.05
0
–0.05
–0.10
OUTPUT VOLTAGE
DEVIATION (V)
600
400
200
0
LOAD CURRENT
(mA)
1763 G49
0203050709010
40
60 80 100
V
IN
= 6V
C
IN
= 10µF
C
OUT
= 10µF
1ms/DIV
C
OUT
= 10µF
I
L
= 500mA 1763 G44
1ms/DIV
C
OUT
= 10µF
I
L
= 500mA 1763 G47
LT1763-5
10Hz to 100kHz Output Noise
C
BYP
= 0
V
OUT
100µV/DIV
LT1763-5
10Hz to 100kHz Output Noise
C
BYP
= 100pF
V
OUT
100µV/DIV
1ms/DIV
C
OUT
= 10µF
I
L
= 500mA 1763 G45
LT1763-5
10Hz to 100kHz Output Noise
C
BYP
= 1000pF
V
OUT
100µV/DIV
1ms/DIV
C
OUT
= 10µF
I
L
= 500mA 1763 G46
LT1763-5
10Hz to 100kHz Output Noise
C
BYP
= 0.01µF
V
OUT
100µV/DIV
voltage drops are caused by the resistance (R
P
) of PC
traces between the regulator and the load. These may be
eliminated by connecting the SENSE pin to the output at
the load as shown in Figure 1 (Kelvin Sense Connection).
OUT (Pin 1): Output. The output supplies power to the
load. A minimum output capacitor of 3.3µF is required to
prevent oscillations. Larger output capacitors will be
required for applications with large transient loads to limit
peak voltage transients. See the Applications Information
section for more information on output capacitance and
reverse output characteristics.
SENSE (Pin 2): Output Sense. For fixed voltage versions
of the LT1763 (LT1763-1.5/LT1763-1.8/LT1763-2.5/
LT1763-3/LT1763-3.3/LT1763-5), the SENSE pin is the
input to the error amplifier. Optimum regulation will be
obtained at the point where the SENSE pin is connected to
the OUT pin of the regulator. In critical applications, small
PIN FUNCTIONS
UUU
Figure 1. Kelvin Sense Connection
IN
SHDN
1763 F01
R
P
OUT
V
IN
SENSE
GND
LT1763
R
P
3
2
1
5
8
+
+
LOAD