LT1964 Ver la hoja de datos (PDF) - Linear Technology
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LT1964 Datasheet PDF : 12 Pages
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LT1964
TYPICAL PERFOR A CE CHARACTERISTICS
LT1964-5, 10Hz to 100kHz Output
Noise, CBYP = 1000pF
LT1964-5, 10Hz to 100kHz Output
Noise, CBYP = 0.01µF
COUT = 10µF
ILOAD = – 200mA
1ms/DIV
1964 G28.tif
LT1964-5, Transient Response,
CBYP = 0
0.2
VIN = –6V
CIN = 10µF
0.1
COUT = 10µF
0
–0.1
–0.2
0
–100
–200
0
400 800 1200 1600 2000
TIME (µs)
1964 G30
COUT = 10µF
ILOAD = – 200mA
1ms/DIV
1964 G29.tif
LT1964-5, Transient Response,
CBYP = 0.01µF
0.04
0.02
0
–0.02
–0.04
VIN = –6V
CIN = 10µF
COUT = 10µF
0
–100
–200
0 20 40 60 80 100 120 140 160 180 200
TIME (µs)
1964 G31
PI FU CTIO S
GND (Pin 1): Ground.
IN (Pin 2): Power is Supplied to the Device Through the
Input Pin. A bypass capacitor is required on this pin if the
device is more than six inches away from the main input
filter capacitor. In general, the output impedance of a
battery rises with frequency, so it is advisable to include a
bypass capacitor in battery-powered circuits. A bypass
capacitor in the range of 1µF to 10µF is sufficient.
BYP (Pin 3, Fixed/–BYP devices): The BYP Pin is used to
Bypass the Reference of the LT1964 to Achieve Low Noise
Performance from the Regulator. A small capacitor from
the output to this pin will bypass the reference to lower the
output voltage noise. A maximum value of 0.01µF can be
used for reducing output voltage noise to a typical 30µVRMS
over a 10Hz to 100kHz bandwidth. If not used, this pin
must be left unconnected.
SHDN (Pin 3/4, –SHDN/Fixed Devices): The SHDN Pin is
used to put the LT1964 into a Low Power Shutdown State.
The SHDN pin is referenced to the GND pin for regulator
control, allowing the LT1964 to be driven by either positive
or negative logic. The output of the LT1964 will be off when
the SHDN pin is pulled within ±0.8V of GND. Pulling the
SHDN pin more than –1.9V or +1.6V will turn the LT1964
on. The SHDN pin can be driven by 5V logic or open
1964f
7
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