Data Sheet

ADPL42001

analog.com

Rev. 0

7 of 17

FUNCTIONAL DIAGRAM

THERMAL

PROTECTION

CONTROL

LOGIC

BANDGAP

FET DRIVER WITH

CURRENT LIMIT

REF = 0.6V

GND

PGOOD

FB

OUT

IN

EN

ADPL42001

Figure 1. Block Diagram

THEORY OF OPERATION

The ADPL42001 ultra-low quiescent current, high-voltage linear regulator is ideal for use in industrial and battery-

operated systems. The device operates from a 4V to 20V input voltage, delivers up to 100mA of load current and

consumes only 8μA of quiescent current at no load. The device consumes only 0.9μA current when in shutdown.

Output voltage is adjustable from 0.6V to 18V voltage range. Feedback voltage accuracy is ±2% over temperature.

An open-drain PGOOD pin provides a power-good signal to the system upon achieving successful regulation of the

output voltage. The device also incorporates an enable pin (EN) that allows the user to turn the part on or off. The

device has a thermal shutdown feature that shuts down the part when the die temperature exceeds 165°C. The

ADPL42001 operates over the -40°C to +125°C industrial temperature range and is available in a compact, 6-lead

TSOT and a 6-pin (3mm x 3mm) TDFN packages.

EN Input

EN is an active-high, logic-level enable input that turns the device on or off. Drive EN high to turn the device on. While

in shutdown, the device consumes only 0.9μA (typ). EN withstands voltages up to VIN + 0.3V, allowing it to be driven

by high input-level voltages, or be connected to IN for always-on operation.