STMicroelectronics LDK130C08R

Overview

LDK130C08R 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, ±2.0% output voltage accuracy at 25 °C, and 30 µA typical quiescent current - designed for power-sensitive automotive point-of-load (PoL) and ADAS subsystems.

For engineers reviewing the LDK130C08R datasheet, LDK130C08R pinout, LDK130C08R application, or LDK130C08R equivalent, this page provides verified technical context, validated SOT23-5L pin mapping, confirmed noise performance (51 µV_RMS, 10 Hz–100 kHz), and real-world PoL/ADAS implementation guidance - all derived from ST's production-grade DS9465 Rev 10 documentation.

Technical Context

The LDK130C08R implements a CMOS-based LDO architecture with internal PMOS pass transistor, enabling ultra-low dropout and sub-1 µA shutdown current. Its feedback loop is optimized for stability with 1 µF ceramic output capacitors and includes integrated bypass filtering for fixed-output variants.

It features logic-controlled enable (EN) with guaranteed 0.4 V low threshold and 1.2 V high threshold across –40 °C to 125 °C, thermal shutdown at 160 °C with 20 °C hysteresis, and short-circuit current limiting at 450 mA - all operating within its 1.9–5.5 V input range and 0.8 V fixed output.

Key Specifications

Pinout & Package

LDK130C08R is packaged in SOT23-5L - a 5-pin, surface-mount, lead-free, RoHS-compliant package with 1.3 mm × 2.8 mm footprint and 1.45 mm height, optimized for high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, automotive-grade LDO applications.

Compared with XC6210B082MR-G, LDK130C08R delivers 50% higher current and automotive qualification; versus ADM7172ACPZ-R7, it offers plug-and-play 0.8 V regulation with no external components while maintaining competitive noise and qualification - making it optimal for space-constrained, high-reliability PoL nodes.

Availability

LDK130C08R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC core rails, and body control unit (BCU) power management requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.

Supply support for LDK130C08R 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and rigorous automotive qualification programs.

LDK130C08R belongs to ST's LDK130 family of ultra-low-noise, AEC-Q100-qualified LDOs - engineered specifically for demanding automotive point-of-load applications where low dropout, low IQ, and high PSRR are essential.

FAQ

What is the minimum input voltage required for LDK130C08R to maintain 0.8 V output at 300 mA?

The minimum input voltage is determined by dropout: at 300 mA and 125 °C, max dropout is 400 mV (per Table 4). Thus, VIN(min) = 0.8 V + 0.4 V = 1.2 V - but the absolute minimum specified operating VIN is 1.9 V per datasheet Section 4, ensuring margin for line regulation and thermal stability.

Can LDK130C08R operate with a 0.47 µF output capacitor?

No - the datasheet specifies 1 µF minimum C_OUT for stability (Section 5, Table 4), and Figure 24 shows instability region below 1 µF for fixed versions. Using 0.47 µF risks oscillation and output overshoot during load transients, violating design requirements.

Is the BYP pin required to be connected for LDK130C08R?

No - the BYP pin is optional for noise reduction. If unused, it must be left floating with no PCB routing (Table 1). Adding a 10 nF capacitor between BYP and GND improves PSRR above 10 kHz but is not required for basic regulation functionality.

Does LDK130C08R support reverse polarity protection on the IN pin?

No - the device has no built-in reverse-polarity protection. Absolute maximum rating for V_IN is –0.3 V (Table 2); applying reverse voltage will damage the IC. External protection (e.g., series Schottky diode or ideal diode controller) is required in systems prone to battery reversal.