STMicroelectronics LDL112PV18R

Overview

LDL112PV18R from STMicroelectronics is a fixed-output 1.8 V, 1.2 A low-dropout linear regulator with 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 V to 5.5 V input and supports ceramic output capacitors as low as 1 µF - deployed in USB-powered portable devices requiring stable low-voltage rail generation.

For engineers reviewing the LDL112PV18R datasheet, LDL112PV18R pinout, LDL112PV18R application, or LDL112PV18R equivalent, key selection criteria include dropout performance under 1.2 A load, sub-1 µA shutdown current, thermal/overcurrent protection behavior, and compatibility with compact DFN6 (2x2) or DFN6 (3x3) PCB footprints.

Technical Context

The LDL112PV18R uses a PMOS pass transistor architecture enabling true reverse current blocking across all enable states, with internal bandgap reference (800 mV) and error amplifier driving the gate. Its feedback loop is internally configured for fixed 1.8 V output, eliminating external resistor networks.

Thermal shutdown activates at 165 °C junction temperature with 20 °C hysteresis; current limiting engages at ~1.4–2 A short-circuit threshold. The EN pin accepts TTL/CMOS-compatible logic levels (V_IL ≤ 0.35 V, V_IH ≥ 1.4 V) and must not be left floating.

Key Specifications

Pinout & Package

LDL112PV18R is available in DFN6 (2x2) mm, DFN6 (3x3) mm, SO8-batwing, and PPAK packages. The exposed pad must be connected to GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B182MR-G and BD3572EFJ-ME2, LDL112PV18R uniquely combines 1.2 A capability, sub-300 mV dropout, and intrinsic reverse current blocking - eliminating external components and simplifying layout in space-constrained, battery-critical designs.

Availability

LDL112PV18R is available at Aetrix Electronics and suitable for USB-powered devices, battery-powered wearables, and low-voltage point-of-load applications requiring stable component supply, consistent parametric performance, and long-lifecycle availability.

Supply support for LDL112PV18R 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 LDL112 series belongs to ST's precision low-quiescent-current LDO portfolio, engineered specifically for energy-constrained portable and always-on systems where efficiency, reliability, and reverse-current safety are non-negotiable.

FAQ

What is the minimum input voltage required for stable 1.8 V output at 1.2 A?

The LDL112PV18R requires VIN ≥ VOUT + VDROP to maintain regulation. With 600 mV maximum dropout at 1.2 A and 125 °C, minimum input is 1.8 V + 0.6 V = 2.4 V. At room temperature, 2.1 V input suffices due to 350 mV typical dropout.

Can LDL112PV18R be used with a 10 µF ceramic output capacitor?

Yes - the device is stable with 1–10 µF ceramic capacitors (ESR < 10 mΩ). Larger values improve transient response but do not degrade stability; Figure 25 in DS10321 confirms stability across this range for all package variants.

Does the exposed thermal pad require solder mask opening?

Yes - the exposed pad must be fully soldered to a GND plane with ≥4 thermal vias (0.3 mm diameter) connecting to inner/ground layers. Omitting the solder mask opening risks poor thermal conduction and derated current capability per R_thJC specs.

Is output discharge functionality included in LDL112PV18R?

No - output discharge is optional and only available on specific part variants (e.g., LDL112PVR with ADJ pin). The fixed-output LDL112PV18R does not integrate active VOUT discharge; external circuitry is required if rapid output decay is needed after shutdown.