Datasheet
LT3014B
6
3014bfa
TYPICAL PERFORMANCE CHARACTERISTICS
1ms/DIV
V
OUT
200μV/DIV
3014B G22
C
OUT
= 0.47μF
I
L
= 20mA
V
OUT
= 1.22V
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (V)
LOAD CURRENT (mA)
–0.02
0.02
800
3014B G23
4
–0.04
0
0.04
6
2
0
200
400
600
1000
V
IN
= 7V
V
OUT
= 5V
C
IN
= C
OUT
= 0.47μF CERAMIC
$I
LOAD
= 1mA TO 5mA
10Hz to 100kHz Output Noise Transient Response
PIN FUNCTIONS
IN (Pin 1/Pin 8): Input. Power is supplied to the device
through the IN pin. A bypass capacitor is required on this
pin if the device is more than six inches away from the main
input fi lter 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 0.1μF to 10μF is suffi cient. The
LT3014B is designed to withstand reverse voltages on
the IN pin with respect to ground and the OUT pin. In the
case of a reversed input, which can happen if a battery is
plugged in backwards, the LT3014B will act as if there is
a diode in series with its input. There will be no reverse
current fl ow into the LT3014B and no reverse voltage will
appear at the load. The device will protect both itself and
the load.
GND (Pin 2/Pins 4, 9): Ground.
ADJ (Pin 4/Pin 2): Adjust. This is the input to the error
amplifi er. This pin is internally clamped to ±7V. It has a
bias current of 4nA which fl ows into the pin (see curve
of ADJ Pin Bias Current vs Temperature in the Typical
Performance Characteristics). The ADJ pin voltage is
1.22V referenced to ground, and the output voltage range
is 1.22V to 60V.
OUT (Pin 5/Pin 1): Output. The output supplies power to
the load. A minimum output capacitor of 0.47μF 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.
NC (Pin 3/Pins 3, 5, 6, 7): No Connect. No Connect pins
may be fl oated, tied to IN or tied to GND.
(SOT-23 Package/DD Package)