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STMicroelectronics LDK220PU-R — Power Management (PMIC / Gate Driver)

LDK220PU-R – STMicroelectronics 200mA Adjustable LDO, 6-DFN

MPNLDK220PU-R
End of Life

STMicroelectronics LDK220PU-R, adjustable positive LDO, 200 mA output, 6-XFDFN (1.2x1.3) package, 90 µA quiescent current, 0.35 V dropout at full load.

$0.97Ref. price · indicative, final on quote
STMicroelectronics LDK220PU-R datasheet (PDF)
Packaging6-XFDFN
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LDK220PU-R specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input13.2V
Voltage dropout0.35V @ 200mA
Output current200mA
Current - supply100 µA
Current - quiescent90 µA
Operating temperature-40°C ~ 125°C
PSRR60dB ~ 45dB (120Hz ~ 10kHz)
PackageTape & Reel (TR); Cut Tape (CT)
Case6-XFDFN
Control featuresEnable
Protection featuresOver Current, Over Temperature
Number of regulators1
Output configurationPositive

Product details

Regulator fit for sensor supply rails

The LDK220PU-R is an adjustable positive LDO from STMicroelectronics delivering 200 mA continuous output. Its PSRR of 60 dB at 120 Hz dropping to 45 dB at 10 kHz makes it a candidate for cleaning up a sensor's analog supply from a switching pre-regulator — the 60 dB floor at line frequency knocks down 120 Hz ripple from a flyback before it reaches the ADC reference. Maximum dropout is 350 mV at the full 200 mA load, so the input rail must sit at least 350 mV above the target output voltage at the worst-case current. Quiescent current is 90 µA typical, rising to a 100 µA maximum — low enough that a battery-powered sensor node can leave the LDO enabled during a brief measurement burst without draining the cell.

Package and board-level integration

Housed in a 6-XFDFN (1.2 x 1.3 mm) package, the LDK220PU-R occupies a footprint roughly the size of a 0402 resistor. Surface-mount only, available on Tape & Reel or Cut Tape. The enable pin lets the system designer gate the output — pull it low to put the regulator into shutdown, cutting the supply current to near zero for the sleep phase of a duty-cycled sensor.

Frequently asked questions

Can LDK220PU-R be used to replace a fixed-output LDO like LDK220PU30R?

The LDK220PU-R is the adjustable-output variant of the LDK220 family. It can replace a fixed-output member (e.g. LDK220PU30R) only if you add the external resistor divider to set the output voltage. The pinout and enable logic are identical, but the fixed-output parts have the divider integrated — swapping requires a board change to add the feedback resistors.

What is the typical application for this LDO?

The LDK220PU-R is suited for powering sensor analog front-ends, MCU core or I/O rails in portable instrumentation, and low-power wireless modules where the combination of 90 µA quiescent current, 200 mA output, and 60 dB PSRR at 120 Hz keeps noise off the supply line.