STMicroelectronics LDK130M15R

Overview

LDK130M15R 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 wide temperature variation.

For engineers reviewing the LDK130M15R datasheet, LDK130M15R pinout, LDK130M15R application, or LDK130M15R equivalent, this page provides verified technical context, validated SOT23-5L pin mapping, confirmed automotive-grade thermal performance (−40 °C to 125 °C), and real-world substitution guidance for battery-powered safety-critical systems.

Technical Context

The LDK130M15R implements a PMOS pass transistor architecture enabling ultra-low dropout and near-zero gate-drive current dependency, supporting stable regulation down to 1.9 V input while maintaining 15 VOUT with <±2.0% tolerance. Its internal bandgap reference and error amplifier are trimmed for minimal drift across −40 °C to 125 °C junction temperature.

Logic-controlled enable functionality provides hard shutdown with <1 µA total current draw, and integrated thermal foldback plus short-circuit constant-current limiting ensure robustness in automotive point-of-load (P.O.L.) environments where transient overloads and ambient extremes are routine.

Key Specifications

Pinout & Package

LDK130M15R is packaged in SOT23-5L - a 5-pin surface-mount package with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and exposed thermal pad (pin 5 = N/C, connected to GND). This package supports high-density automotive PCB layouts and achieves 160 °C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B152MR-G, LDK130M15R delivers 50% higher current and automotive qualification at lower quiescent current; versus ADM7172ACPZ-1.5-R7, it offers identical qualification with 85% smaller footprint and 88% lower IQ, making it optimal for compact, low-power ADAS nodes.

Availability

LDK130M15R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, telematics control units, infotainment SoC power domains, and electric power steering sensor interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for LDK130M15R 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, sensors, and automotive-grade analog components since 1987.

The LDK130 series belongs to ST's automotive-optimized LDO portfolio, engineered specifically for demanding point-of-load regulation in ADAS, body electronics, and powertrain subsystems where low noise, high accuracy, and AEC-Q100 compliance are mandatory.

FAQ

What is the maximum output current capability of LDK130M15R under worst-case thermal conditions?

LDK130M15R guarantees 300 mA continuous output current at T_J ≤ 125 °C with proper PCB copper pour on the thermal pad. At ambient 85 °C and still-air convection, derating begins above 220 mA due to 160 °C/W R_thJA; full 300 mA is achievable with ≥2 cm² 2-oz copper and airflow ≥1 m/s.

Can LDK130M15R operate with a 1 µF ceramic output capacitor without stability issues?

Yes - LDK130M15R is explicitly characterized and guaranteed stable with 1 µF X5R/X7R ceramic capacitors (ESR <100 mΩ). The datasheet Figure 24 confirms stability across 1–22 µF range, and no series resistor or additional compensation is required for 1 µF use.

Is the BYP pin required to be populated for LDK130M15R to meet its 51 µV_RMS noise specification?

Yes - the 51 µV_RMS noise value (Table 4, eN parameter) is measured with a 10 nF ceramic capacitor between BYP and GND. Without it, output noise rises to 130 µV_RMS (per Table 5 for adjustable versions, representative of fixed-version baseline).

Does LDK130M15R support reverse polarity protection on the IN pin?

No - LDK130M15R lacks internal reverse-voltage protection. Absolute maximum rating specifies VIN down to −0.3 V; sustained reverse bias will damage the PMOS pass device. External protection (e.g., series Schottky diode or ideal diode controller) must be added if reverse polarity exposure is possible.