STMicroelectronics LDK130M32R

Overview

LDK130M32R 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 is designed for power-sensitive automotive point-of-load (P.O.L.) and ADAS subsystems requiring ultra-low noise and stable regulation under wide temperature (-40 °C to 125 °C).

For engineers reviewing the LDK130M32R datasheet, LDK130M32R pinout, LDK130M32R application, or LDK130M32R equivalent, this page provides verified technical context, validated SOT23-5L pin mapping, confirmed automotive-grade thermal and noise performance, and real-world selection guidance against comparable fixed-output LDOs.

Technical Context

The LDK130M32R implements a PMOS pass transistor architecture enabling very low dropout and near-zero gate-drive current, supporting stable regulation down to 1.9 V input while maintaining full 300 mA output capability across -40 °C to 125 °C. Its internal bandgap reference and error amplifier deliver tight load/line regulation (0.006 %/mA and 0.05 %/V) and low thermal drift.

It integrates logic-controlled shutdown (EN pin), internal current limiting, thermal shutdown at 160 °C with 20 °C hysteresis, and is optimized for ceramic output capacitors as low as 1 µF - eliminating need for ESR-stabilizing tantalum or aluminum electrolytics in space-constrained automotive modules.

Key Specifications

Pinout & Package

LDK130M32R is supplied in the SOT23-5L package - a 5-pin, surface-mount, lead-free, RoHS-compliant outline measuring 2.9 mm × 1.6 mm × 1.1 mm (max), optimized for automated assembly and high-density PCB layouts in automotive control units.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Compared with XC6210B322MR-G, LDK130M32R adds AEC-Q100 Grade 1 qualification and 125 °C operation at no IQ penalty; versus ADM7172ACPZ-3.2-R7, it delivers 50% higher current in half the footprint while trading 40 µV_RMS noise for automotive robustness and cost efficiency.

Availability

LDK130M32R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment power trees, and telematics control units requiring stable component supply with full AEC-Q100 compliance and long-term production continuity.

Supply support for LDK130M32R 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 components for industrial, automotive, and consumer markets.

The LDK130 series belongs to ST's automotive-optimized LDO portfolio, engineered specifically for low-noise, low-quiescent-current point-of-load regulation in ADAS, body electronics, and infotainment systems demanding AEC-Q100 Grade 1 reliability.

FAQ

What output voltage does LDK130M32R provide?

LDK130M32R delivers a fixed 3.2 V output with ±2.0% tolerance at 25 °C and ±3.0% over the full -40 °C to +125 °C operating temperature range. The 'M32R' suffix explicitly denotes the 3.2 V fixed-output variant in the SOT23-5L package, as confirmed in ST's official order code table (DS9465 Rev 10, Table 11).

Is LDK130M32R qualified for automotive use?

Yes - LDK130M32R is fully AEC-Q100 qualified for Grade 1 (−40 °C to +125 °C ambient), with test reports covering HTOL, TC, UHAST, and mechanical stress validation. This qualification applies specifically to the SOT23-5L package variant, as stated in the datasheet's Features section and Table 3 (thermal data).

Can LDK130M32R operate with a 1 µF ceramic output capacitor?

Yes - the datasheet explicitly specifies stability with COUT ≥ 1 µF ceramic (Table 4, COUT row; Figure 24/25 stability regions). No minimum ESR requirement exists, and the device remains stable across the full 1–22 µF range, enabling compact, low-BOM-count designs in automotive modules.

What is the maximum input voltage for LDK130M32R?

The absolute maximum DC input voltage is 7 V (Table 2), but the recommended operating range is 1.9 V to 5.5 V (Table 4). Operation above 5.5 V risks exceeding safe power dissipation limits, especially at high ambient temperatures, and is outside the characterized specification range.