3012B View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
3012B Datasheet PDF : 16 Pages
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LT3012B
PI FU CTIO S (DFN Package)/(TSSOP Package)
OUT (Pins 2, 3)/(Pins 3, 4): 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 ca-
pacitance and reverse output characteristics.
ADJ (Pin 4)/(Pin 5): Adjust. This is the input to the error
amplifier. This pin is internally clamped to ±7V. It has a
bias current of 30nA which flows into the pin (see curve of
ADJ Pin Bias Current vs Temperature in the Typical Perfor-
mance Characteristics). The ADJ pin voltage is 1.24V
referenced to ground, and the output voltage range is
1.24V to 60V.
GND (Pins 5, 13)/(Pins 1, 6, 8, 9, 16, 17): Ground. The
exposed backside of the package is an electrical connec-
tion for GND. As such, to ensure optimum device opera-
tion and thermal performance, the exposed pad must be
connected directly to pin 5/pin 6 on the PC board.
IN (Pins 10, 11)/(Pins 13,14): 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 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. The LT3012B 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 LT3012B
will act as if there is a diode in series with its input. There
will be no reverse current flow into the LT3012B and no
reverse voltage will appear at the load. The device will
protect both itself and the load.
NC (Pins 1, 6-9, 12)/(Pins 2, 7, 10-12, 15): No Connect.
No Connect pins may be floated, tied to IN or tied to GND.
3012bf
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