STMicroelectronics LDL112PV12R

Overview

LDL112PV12R from STMicroelectronics is a 1.2 A low-dropout linear regulator with fixed 1.2 V output, 300 mV typical dropout at 1 A, ±2.0% output voltage accuracy at 25 °C, reverse current protection, and logic-controlled shutdown. It operates from 1.6–5.5 V input and supports ceramic output capacitors as low as 1 µF-ideal for USB-powered devices and battery-powered point-of-load regulation.

For engineers reviewing the LDL112PV12R datasheet, LDL112PV12R pinout, LDL112PV12R application, or LDL112PV12R equivalent, key selection criteria include dropout performance under 1.2 A load, thermal behavior in DFN6 (3x3) package, enable threshold stability across –40 to 125 °C, and reverse current blocking during off-state or back-powering events.

Technical Context

The LDL112PV12R uses a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse current blocking without external components. Its bandgap reference and error amplifier maintain tight output regulation across temperature and load, with internal current limiting set at ~1.4–2 A and thermal shutdown triggered at 165 °C with 20 °C hysteresis.

Logic-level enable control (V_EN low = shutdown, <0.35 V; high = active, >1.4 V) reduces quiescent current to ≤1 µA in off mode. The fixed 1.2 V version eliminates external feedback resistors, while its stability with 1 µF ceramic C_OUT simplifies layout in space-constrained portable designs.

Key Specifications

Pinout & Package

LDL112PV12R is packaged in DFN6 (3×3) mm with exposed thermal pad, optimized for compact PCB layouts and efficient heat dissipation (R_thJA = 55 °C/W). The exposed pad must be soldered to GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with XC6210B122MR-G and BD33IC0WEFJ-C, LDL112PV12R uniquely combines 1.2 A capability, true reverse current blocking, and sub-1 µA shutdown-making it the only choice for compact, battery-critical, or back-power-resilient 1.2 V point-of-load designs.

Availability

LDL112PV12R is available at Aetrix Electronics and suitable for USB-powered devices, battery-powered IoT sensors, and low-voltage point-of-load applications requiring stable component supply, extended temperature support, and high-reliability packaging.

Supply support for LDL112PV12R 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 specializing in power management, microcontrollers, and analog ICs, with manufacturing aligned to ISO/TS 16949 and environmental standards including ECOPACK®.

The LDL112 series is part of ST's high-efficiency LDO portfolio designed specifically for space-constrained, battery-sensitive applications demanding ultra-low IQ, reverse current blocking, and ceramic-capacitor stability.

FAQ

What is the minimum input voltage required to maintain 1.2 V output at 1.2 A load?

The minimum input voltage equals the output voltage plus the worst-case dropout. At 1.2 A and –40 to 125 °C, dropout is up to 600 mV per Table 4. Thus, minimum VIN = 1.2 V + 0.6 V = 1.8 V. Below this, regulation is lost and VOUT drops linearly with VIN.

Can LDL112PV12R be used with a 10 µF aluminum electrolytic output capacitor?

No-stability is guaranteed only with ceramic capacitors (1–10 µF, ESR < 10 mΩ). Aluminum electrolytics have higher ESR and ESL, risking oscillation or poor transient response. The datasheet explicitly specifies ceramic COUT; substituting aluminum types voids stability assurance.

Does the exposed pad on the DFN6 (3x3) package require a dedicated thermal via array?

Yes-the exposed pad must be soldered to a solid GND plane, and ST recommends ≥4 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) connecting it to inner/ground layers. This achieves the specified R_thJA = 55 °C/W; omitting vias raises junction temperature by >25 °C at full load.

Is output discharge functionality included in the LDL112PV12R variant?

No-output discharge is optional and only available on versions marked "LDL112PVR" (adjustable) or specific suffixes denoting that feature. The LDL112PV12R is a fixed-output variant without integrated discharge FET; external circuitry is required if rapid VOUT discharge is needed after shutdown.