STMicroelectronics LDK130M08R

Overview

LDK130M08R 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 post-regulator in battery-powered ADAS domain controllers requiring ultra-low noise and stable 0.8 V rail generation.

For engineers reviewing the LDK130M08R datasheet, LDK130M08R pinout, LDK130M08R application, or LDK130M08R equivalent, this page provides verified package mapping (SOT23-5L), validated thermal performance up to 125 °C junction, confirmed ceramic capacitor compatibility (1 µF COUT), and real-world load/line transient behavior per Figure 27–29 of DS9465 Rev 10.

Technical Context

The LDK130M08R implements a PMOS pass transistor architecture enabling ultra-low dropout and near-zero gate-drive current dependency, resulting in stable regulation even under fast load transients (Figure 28–29). Its internal bandgap reference and error amplifier deliver ±2.0% initial output tolerance and <0.006 %/mA static load regulation across –40 °C to 125 °C.

Logic-controlled enable (EN) pin supports active-high operation with 1.2 V min high threshold and <0.4 V max low threshold, allowing direct interfacing with 1.8 V/3.3 V microcontrollers. Integrated thermal shutdown (160 °C) and short-circuit current limiting (450 mA typ.) provide autonomous fault protection without external circuitry.

Key Specifications

Pinout & Package

LDK130M08R is packaged in SOT23-5L - a 5-pin, surface-mount, lead-free, RoHS-compliant package with 1.3 mm × 2.9 mm footprint and 1.45 mm height (mechanical data per DS9465 Rev 10, Table 6 & Figure 35–36). Thermal resistance R_thJA = 160 °C/W enables 300 mA operation at ≤65 °C ambient with standard PCB copper.

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 and ADP7182ACPZN-R7, LDK130M08R uniquely delivers 300 mA output at 125 °C junction while maintaining AEC-Q100 Grade 1 compliance and sub-1 µA shutdown - making it the only drop-in solution for high-temperature ADAS core rails.

Availability

LDK130M08R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment processors, and body control units requiring stable component supply with full AEC-Q100 traceability and extended temperature support.

Supply support for LDK130M08R 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 devices.

The LDK130 series belongs to ST's automotive-optimized LDO portfolio, engineered specifically for low-noise, low-I_Q power delivery in ADAS, telematics, and body electronics - with emphasis on AEC-Q100 compliance and ceramic-capacitor stability.

FAQ

What is the minimum input voltage required for LDK130M08R to regulate 0.8 V output at 300 mA?

The minimum input voltage is determined by dropout: at 300 mA and 125 °C, maximum dropout is 400 mV (Table 4). Therefore, VIN(min) = 0.8 V + 0.4 V = 1.2 V. However, the absolute minimum specified VIN is 1.9 V per Table 2 - so 1.9 V is the guaranteed operational floor, providing 1.1 V headroom for stability and transient margin.

Can LDK130M08R be used with a 2.2 µF X5R ceramic output capacitor?

Yes. The stability region (Figure 24) confirms stable operation with COUT from 1 µF to 22 µF and ESR <10 Ω at 100 kHz. A 2.2 µF X5R capacitor (typical ESR ≈ 30 mΩ) falls well within this zone and improves load transient response versus the minimum 1 µF value.

Does the BYP pin require a capacitor for basic functionality?

No. The BYP pin is optional for noise reduction: leaving it floating maintains full regulation capability. Adding a 10 nF capacitor reduces integrated output noise from 51 µV_RMS to ~15 µV_RMS (Figure 20–21), but is unnecessary for non-RF applications like MCU core supplies.

How does thermal shutdown behave during sustained overload?

Thermal shutdown activates at 160 °C junction temperature (Table 4) with 20 °C hysteresis. Once triggered, the device shuts down output and draws <1 µA until junction cools to ~140 °C, then automatically resumes regulation - no external reset or latch is needed.