STMicroelectronics LDK130C15R

Overview

LDK130C15R from STMicroelectronics is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator in SOT23-5L package, delivering 300 mA output current with 100 mV typical dropout at 100 mA, ±2.0% output voltage tolerance at 25 °C, and 30 µA typical quiescent current. It powers safety-critical ADAS domain controllers and automotive point-of-load (P.O.L.) rails where ultra-low noise and thermal robustness are essential.

For engineers reviewing the LDK130C15R datasheet, LDK130C15R pinout, LDK130C15R application, or LDK130C15R equivalent, this page provides verified technical context for automotive power rail design, including validated thermal derating curves, ceramic capacitor stability boundaries, enable logic thresholds across temperature, and real-world transient response under load and line steps.

Technical Context

The LDK130C15R implements a PMOS pass transistor architecture enabling ultra-low dropout and near-zero gate-drive current, supporting operation down to 1.9 V input while maintaining regulation across -40 °C to 125 °C junction temperature. Its internal bandgap reference and error amplifier deliver ±2.0% output accuracy at 25 °C and ±3.0% over full temperature range.

It integrates logic-controlled shutdown (EN pin), internal current limiting (~450 mA short-circuit current), and thermal shutdown at 160 °C with 20 °C hysteresis. The device is stabilized with ≥1 µF ceramic output capacitance and supports optional 10 nF bypass capacitor on fixed versions for sub-51 µV_RMS noise performance (10 Hz–100 kHz).

Key Specifications

Pinout & Package

SOT23-5L package: 5-pin surface-mount, 2.9 mm × 1.6 mm × 1.1 mm body, 0.95 mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant and ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6215D152MR-G, LDK130C15R delivers double the output current and automotive qualification at similar footprint; versus ADM7172ACPZ-1.5-R7, it reduces quiescent current by 85% and cuts solution cost by 40% while meeting ADAS thermal and noise requirements.

Availability

LDK130C15R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC core rails, and telematics control units requiring stable component supply with full AEC-Q100 traceability and PPAP support.

Supply support for LDK130C15R 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

The LDK130 series belongs to ST's automotive-grade power management portfolio, engineered specifically for demanding point-of-load regulation in ADAS, body electronics, and infotainment systems where low noise, high reliability, and extended temperature operation are mandatory.

FAQ

What is the exact output voltage of LDK130C15R?

The 'C15R' suffix denotes a fixed 1.5 V output voltage with ±2.0% tolerance at 25 °C and ±3.0% over -40 °C to +125 °C operating junction temperature. This is confirmed in Table 4 of DS9465 Rev 10, where V_OUT accuracy is specified for fixed versions under defined test conditions.

Can LDK130C15R operate with only a 1 µF output capacitor?

Yes - the datasheet explicitly states compatibility with 1 µF ceramic capacitors (C_OUT = 1 µF minimum), and Figure 24 confirms stability across 1–22 µF for fixed versions. No ESR requirement applies, simplifying layout and reducing bill-of-materials cost.

Is the EN pin internally pulled down?

No - the EN pin has no internal pull-down. It is a high-impedance CMOS input with leakage <100 nA. External pull-down is required if default-off behavior is needed; however, most automotive systems drive EN actively from MCU GPIO or power sequencer.

Does LDK130C15R require a bypass capacitor on the BYP pin?

No - the BYP pin is optional for fixed-output versions like LDK130C15R. If used, a 10 nF ceramic capacitor reduces output noise to 51 µV_RMS; if omitted, the pin must be left floating with no PCB routing, as stated in Table 1 Pin Description.