STMicroelectronics LDK130C10R

Overview

LDK130C10R 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 supports fixed 1.0 V output in SOT23-5L package and targets power-sensitive automotive point-of-load (P.O.L.) and ADAS subsystems.

For engineers reviewing the LDK130C10R datasheet, LDK130C10R pinout, LDK130C10R application, or LDK130C10R equivalent, key selection criteria include its ultra-low noise (51 µV_RMS), logic-controlled shutdown (<1 µA OFF current), ceramic capacitor compatibility (C_OUT = 1 µF), thermal/short-circuit protection, and -40 °C to 125 °C operating range.

Technical Context

The LDK130C10R implements a PMOS pass transistor architecture enabling very low dropout and stable regulation across wide load and temperature ranges. Its internal bandgap reference and error amplifier maintain tight output accuracy while supporting fast transient response during load steps up to 300 mA.

It integrates enable logic with defined high/low thresholds (V_EN(H) ≥ 1.2 V, V_EN(L) ≤ 0.4 V), thermal shutdown at 160 °C with 20 °C hysteresis, and short-circuit current limiting at 450 mA. The device is optimized for use with low-ESR ceramic capacitors and requires no external compensation.

Key Specifications

Pinout & Package

LDK130C10R is packaged in SOT23-5L, a surface-mount 5-pin plastic package with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and exposed thermal pad (not electrically connected). It supports reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B102MR-G and RT9013-10GB, the LDK130C10R uniquely combines AEC-Q100 Grade 1 compliance, 30 µA IQ, and 51 µV_RMS noise - making it the only viable choice for safety-relevant automotive P.O.L. applications demanding both ultra-low power and ultra-low noise.

Availability

LDK130C10R is available at Aetrix Electronics and suitable for automotive ADAS modules, body control units, and telematics systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for LDK130C10R 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 designing and manufacturing microcontrollers, power management ICs, and automotive-grade analog components with vertical fabrication capabilities.

The LDK130 series belongs to ST's automotive-optimized LDO portfolio, engineered specifically for low-noise, low-power point-of-load regulation in ADAS, infotainment, and body electronics where AEC-Q100 compliance and thermal robustness are mandatory.

FAQ

What is the minimum input voltage required for LDK130C10R to regulate 1.0 V output?

The LDK130C10R requires a minimum input voltage of 1.9 V to maintain regulation at 1.0 V output. At 100 mA load, its 100 mV typical dropout means it can sustain regulation down to VIN = 1.1 V in theory, but the absolute minimum specified VIN is 1.9 V due to internal circuitry and AEC-Q100 validation constraints across temperature and process corners.

Can LDK130C10R be used with a 2.2 µF ceramic output capacitor?

Yes - the LDK130C10R is stable with ceramic output capacitors ranging from 1 µF to 22 µF, including 2.2 µF X5R/X7R types. Its internal compensation is designed for low-ESR ceramics, and Figure 24 in the datasheet confirms stability across this capacitance range with ESR < 1 Ω, making 2.2 µF a valid and commonly used value for improved transient response.

Does LDK130C10R require a bypass capacitor on the BYP pin?

No - the BYP pin on the LDK130C10R (fixed 1.0 V version) is optional. If used, a 10 nF ceramic capacitor reduces output noise; if omitted, the pin must be left floating with no PCB routing. Unlike adjustable versions, the fixed variant does not require BYP for basic regulation, and noise performance remains within spec (51 µV_RMS) even without it.

How does thermal shutdown behave during sustained overload?

LDK130C10R activates thermal shutdown at 160 °C junction temperature with 20 °C hysteresis, meaning it resumes regulation only after cooling to ~140 °C. During continuous short-circuit, the device cycles between regulation and shutdown, limiting average power dissipation and preventing permanent damage - a behavior verified across -40 °C to 125 °C ambient per AEC-Q100 stress testing.