ADPL42010ABRCZ datasheet(10/28 Pages) AD

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Data Sheet

ADPL42010A

analog.com

Rev. 0

10 of 28

NAME

DESCRIPTION

3-Lead

SOT-223

8-Lead

of the regulator. The SENSE pin bias current is 600µA at the

nominal rated output voltage. The SENSE pin can be pulled

below ground (as in a dual supply system where the regulator

load is returned to a negative supply) and still allow the device

to start and operate.

Adjust Pin. For the adjustable ADPL42010A, the ADJ pin is the

input to the error amplifier. This pin is internally clamped to

±7V. It has a bias current of 3µA which flows into the pin. The

ADJ pin voltage is 1.21V referenced to ground and the output

voltage range is 1.21V to 20V.

Figure 4. Kelvin Sense Connection

3, 6, 7

GND

Regulator Ground Pin. To ensure proper elecrical and thermal

performance, connect all GND pins of the package to the

ground.

No Connect. Not connected internally.

SHDN

Shutdown Pin. The SHDN pin is used to put the ADPL42010A

regulators into a low-power shutdown state. The output is off

when the SHDN pin is pulled low. The SHDN pin can be driven

either by 5V logic or open-collector logic with a pull-up resistor.

The pull-up resistor is required to supply the pull-up current of

the opencollector gate, normally several microamperes, and

the SHDN pin current, typically 3µA. If unused, the SHDN pin

must be connected to VIN. The device is in the low-power

shutdown state if the SHDN pin is not connected.

Regulator Supply Input Pin. Power is supplied to the device

through the IN pin. A bypass capacitor is required on this pin if

the device is more than 6inches 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 ADPL42010A regulators are

designed to withstand reverse voltages on the IN pin with

respect to ground and the OUT pin. In the case of a reverse

input, which can happen if a battery is plugged in backwards,

the device acts as if there is a diode in series with its input.

There is no reverse current flow into the regulator and no

SHDN

OUT

VIN

SENSE

GND

ADPL42010A

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