STMicroelectronics LDK130PU12R

Overview

LDK130PU12R 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, 30 µA typical quiescent current, ±2.0% output voltage accuracy at 25 °C, and operation across -40 °C to 125 °C ambient. It powers critical power rails in ADAS domain controllers and automotive point-of-load systems where ultra-low noise and shutdown current <1 µA are required.

For engineers reviewing the LDK130PU12R datasheet, LDK130PU12R pinout, LDK130PU12R application, or LDK130PU12R equivalent, this page provides verified pin functions, real-world thermal and transient performance data, fixed 1.2 V output configuration details, ceramic capacitor stability guidance (1 µF COUT), and validated automotive-grade alternatives for functional replacement in safety-critical designs.

Technical Context

The LDK130PU12R implements a PMOS pass transistor architecture enabling very low dropout and near-zero gate-drive current, supporting stable regulation down to VIN = VOUT + 100 mV. Its internal bandgap reference and error amplifier deliver tight DC accuracy (±2.0% at 25 °C) and low temperature drift (±3.0% over -40 °C to 125 °C).

It integrates logic-controlled enable (EN) with defined thresholds (VIL ≤ 0.4 V, VIH ≥ 1.2 V), thermal shutdown at 160 °C with 20 °C hysteresis, and short-circuit current limiting (~450 mA). Noise performance is optimized via internal bypass path-51 µVRMS (10 Hz–100 kHz) with 10 nF external bypass capacitor on fixed versions.

Key Specifications

Pinout & Package

SOT23-5L package: 2.9 mm × 1.6 mm × 1.1 mm body, 0.95 mm pitch, thermally enhanced exposed pad (pin 5 N/C tied to GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B122MR-G and RT9013-12GB, the LDK130PU12R uniquely combines AEC-Q100 Grade 1 certification, 300 mA capability, 30 µA quiescent current, and 51 µVRMS noise-making it the sole choice for regulated 1.2 V core rails in ISO 26262 ASIL-B compliant domains.

Availability

LDK130PU12R is available at Aetrix Electronics and suitable for automotive ADAS camera modules, telematics control units, and body control modules requiring stable component supply with full AEC-Q100 traceability and extended temperature support.

Supply support for LDK130PU12R 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 analog, MCU, power, and automotive-grade ICs for industrial, automotive, and consumer markets.

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

FAQ

What is the exact output voltage tolerance of LDK130PU12R across temperature?

The LDK130PU12R has ±2.0% output voltage tolerance at 25 °C and ±3.0% over the full operating junction temperature range of -40 °C to 125 °C, as specified in Table 4 of DS9465 Rev 10. This applies to the fixed 1.2 V version with 1 mA load current and nominal input conditions.

Can LDK130PU12R operate with only a 1 µF output capacitor?

Yes-LDK130PU12R is explicitly characterized and stabilized with a 1 µF ceramic output capacitor (X5R/X7R), as confirmed in Section 6 "Typical performance characteristics" and Figure 24 of the datasheet. No minimum ESR requirement exists, simplifying layout and reducing BOM count.

Is the BYP pin required to be connected for LDK130PU12R?

No-the BYP pin (pin 4) on LDK130PU12R is optional. When used, a 10 nF ceramic capacitor between BYP and GND reduces output noise to 51 µVRMS; if omitted, the pin must remain unconnected and un-routed on the PCB, per Table 1 and Figure 3 of DS9465 Rev 10.

Does LDK130PU12R support input voltages below 2.0 V?

Yes-LDK130PU12R operates with input voltages as low as 1.9 V (absolute minimum), enabling use with partially discharged Li-ion cells or low-voltage supercapacitor backup supplies. Dropout remains functional down to VIN = VOUT + 100 mV, so 1.3 V input still regulates 1.2 V output at light loads.