STMicroelectronics LDK130M11RY

Overview

LDK130M11RY from STMicroelectronics is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator 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 operation from 1.9 V to 5.5 V input. It serves as a precision power supply for ADAS sensor modules requiring ultra-low noise and stable bias under battery-voltage variation.

For engineers reviewing the LDK130M11RY datasheet, LDK130M11RY pinout, LDK130M11RY application, or LDK130M11RY equivalent, this page delivers verified technical context, validated SOT23-5L pin mapping, confirmed automotive-grade thermal performance (−40 °C to 125 °C), and real-world substitution guidance for PoL designs in safety-critical vehicle systems.

Technical Context

The LDK130M11RY implements a PMOS pass transistor architecture enabling ultra-low dropout and minimal load-dependent regulation shift. Its internal bandgap reference and error amplifier maintain output stability across temperature and line/load transients, with integrated thermal shutdown (160 °C) and short-circuit current limiting (450 mA typical).

It features logic-controlled enable (EN) with guaranteed low-level threshold ≤0.4 V and high-level threshold ≥1.2 V across −40 °C to 125 °C, supporting robust microcontroller-driven power sequencing. The device achieves 55 dB supply voltage rejection from 120 Hz to 10 kHz and 51 µV_RMS output noise (10 Hz–100 kHz) with 10 nF bypass capacitor.

Key Specifications

Pinout & Package

LDK130M11RY is packaged in SOT23-5L - a 5-pin, surface-mount, lead-free, RoHS-compliant package with 1.3 mm × 2.8 mm footprint and 1.0 mm max height, optimized for high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B332MR-G and ADP7102ARDZ-3.3-R7, the LDK130M11RY uniquely combines AEC-Q100 Grade 1, 125 °C operation, 100 mV dropout, and 51 µV_RMS noise - making it the sole choice for thermally constrained, safety-rated ADAS power nodes.

Availability

LDK130M11RY is available at Aetrix Electronics and suitable for automotive ADAS camera modules, body control units, and electric power steering systems requiring stable component supply with full AEC-Q100 documentation and lot traceability.

Supply support for LDK130M11RY 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-optimized LDO portfolio, engineered specifically for power integrity in ADAS, body electronics, and chassis control systems where low noise, high temperature resilience, and functional safety compliance are mandatory.

FAQ

What is the fixed output voltage of LDK130M11RY?

The "M11RY" suffix denotes a fixed 3.3 V output version, confirmed by STMicroelectronics' official order code table (DS9465 Rev 10, Table 11). Output voltage tolerance is ±2.0% at 25 °C and ±3.0% across −40 °C to +125 °C operating range, with no external resistors required.

Can LDK130M11RY operate with a 1 µF ceramic output capacitor?

Yes - the datasheet explicitly states compatibility with 1 µF ceramic capacitors (COUT), and Figure 24 confirms stable operation within the recommended 1–22 µF range with ESR <10 Ω. No additional ESR network or damping components are needed, simplifying layout and reducing BOM count.

Is the BYP/ADJ pin required to be connected for the fixed-output LDK130M11RY?

No - for fixed-output variants like M11RY, the BYP/ADJ pin is optional. If used, a 10 nF ceramic capacitor improves noise performance; if omitted, the pin must remain unconnected and un-routed on the PCB, per Table 1 and Section 3 of DS9465 Rev 10.

Does LDK130M11RY support reverse polarity protection?

No - the device lacks integrated reverse-voltage protection. Absolute maximum rating specifies VIN down to −0.3 V, meaning sustained reverse input will damage the IC. External protection (e.g., series Schottky diode or ideal diode controller) is required in battery-reversal-prone automotive environments.