STMicroelectronics LDK130M22RY

Overview

LDK130M22RY from STMicroelectronics is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator in SOT23-5L package, delivering 300 mA output current with 100 mV typical dropout at 100 mA, 30 µA typical quiescent current, ±2.0% output voltage accuracy at 25 °C, and 51 µV_RMS output noise (10 Hz–100 kHz) - deployed in ADAS power rails and automotive point-of-load systems.

For engineers reviewing the LDK130M22RY datasheet, LDK130M22RY pinout, LDK130M22RY application, or LDK130M22RY equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and noise performance, and real-world substitution guidance for battery-powered and safety-critical embedded power designs.

Technical Context

The LDK130M22RY implements a PMOS pass transistor architecture enabling ultra-low dropout and stable operation with 1 µF ceramic output capacitance. Its internal bandgap reference and error amplifier maintain tight regulation across –40 °C to +125 °C junction temperature range while supporting logic-controlled shutdown via dedicated EN pin.

It integrates thermal shutdown (160 °C trip, 20 °C hysteresis) and short-circuit current limiting (~450 mA), with supply voltage rejection of 55 dB (120 Hz–10 kHz) and line/load regulation of 0.05 %/V and 0.006 %/mA respectively - optimized for noise-sensitive analog and RF subsystems in automotive electronics.

Key Specifications

Pinout & Package

SOT23-5L package: 5-pin surface-mount with exposed thermal pad (pin 5 N/C, recommended tied to GND), 1.3 mm × 2.9 mm body, 0.95 mm height, JEDEC MO-178 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with XC6210B22MR-G and RT9013-22GB, the LDK130M22RY uniquely combines AEC-Q100 Grade 1 certification, 125 °C junction rating, and 51 µV_RMS noise - making it the sole option qualified for ADAS camera and radar power domains requiring simultaneous low noise, high temperature resilience, and automotive reliability.

Availability

LDK130M22RY is available at Aetrix Electronics and suitable for automotive ADAS camera modules, telematics control units, and body control module sensor interfaces requiring stable component supply across extended temperature and long product lifecycles.

Supply support for LDK130M22RY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, and automotive-grade analog devices since 1987.

The LDK130 series belongs to ST's automotive-qualified LDO portfolio, engineered specifically for low-noise, low-IQ point-of-load regulation in ADAS, infotainment, and body electronics - emphasizing AEC-Q100 compliance, thermal robustness, and ceramic-capacitor stability.

FAQ

What is the exact output voltage of LDK130M22RY?

The LDK130M22RY is a fixed-output variant delivering 2.2 V nominal output voltage, with ±2.0% tolerance at 25 °C and ±3.0% over the full –40 °C to +125 °C operating junction temperature range, as specified in Table 4 of DS9465 Rev 10.

Can LDK130M22RY operate with a 1.9 V input and still regulate 2.2 V output?

No - the minimum input voltage required to sustain 2.2 V output is VIN ≥ VOUT + VDROP. With a typical dropout of 100 mV at 100 mA, the absolute minimum input is 2.3 V; at 300 mA, dropout rises to 200–400 mV, requiring ≥2.4 V input. Operation below 2.3 V results in unregulated output.

Is an external bypass capacitor required on the BYP/ADJ pin for LDK130M22RY?

No - the BYP/ADJ pin on the fixed-output LDK130M22RY serves solely as a noise-reduction bypass node. A 10 nF ceramic capacitor between BYP/ADJ and GND is optional and improves PSRR/noise; if omitted, the pin must remain unconnected and un-routed on the PCB per Table 1 and Figure 3 of the datasheet.

Does LDK130M22RY support reverse polarity or reverse current protection?

No - the LDK130M22RY does not integrate reverse-voltage or reverse-current protection. It relies on external circuitry (e.g., series Schottky diode or ideal diode controller) if reverse input polarity or backfeed from the output rail is possible in the target application.