LT1763(1999) Ver la hoja de datos (PDF) - Linear Technology
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LT1763 Datasheet PDF : 16 Pages
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LT1763 Series
TYPICAL PERFORMANCE CHARACTERISTICS
LT1763-5
10Hz to 100kHz Output Noise
CBYP = 0
LT1763-5
10Hz to 100kHz Output Noise
CBYP = 100pF
LT1763-5
10Hz to 100kHz Output Noise
CBYP = 1000pF
VOUT
100µV/DIV
VOUT
100µV/DIV
VOUT
100µV/DIV
COUT = 10µF
IL = 500mA
1ms/DIV
1763 G46
LT1763-5
10Hz to 100kHz Output Noise
CBYP = 0.01µF
VOUT
100µV/DIV
COUT = 10µF
IL = 500mA
1ms/DIV
1763 G45
COUT = 10µF
IL = 500mA
1ms/DIV
LT1763-5
Transient Response
CBYP = 0
0.4
VIN = 6V
CIN = 10µF
0.2 COUT = 10µF
0
–0.2
–0.4
1763 G47
COUT = 10µF
IL = 500mA
1ms/DIV
LT1763-5
Transient Response
CBYP = 0.01µF
0.10
0.05
0
–0.05
–0.10
VIN = 6V
CIN = 10µF
COUT = 10µF
1763 G44
600
400
200
0
0
200 400 600 800 1000
TIME (µs)
1763 G48
600
400
200
0
0 10 20 30 40 50 60 70 80 90 100
TIME (µs)
1763 G49
PIN FUNCTIONS
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
10
voltage drops are caused by the resistance (RP) 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).
+
VIN
8
IN
1 RP
OUT
LT1763
5
2
+
SHDN SENSE
GND
3
RP
LOAD
1763 F01
Figure 1. Kelvin Sense Connection
1763fa
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