STMicroelectronics LDL212PVR

Overview

LDL212PVR from STMicroelectronics is a high-PSRR, low-dropout linear regulator IC supporting adjustable output voltages from 1.18 V to VIN − VDROP(MAX), with guaranteed 1.2 A output current, 350 mV typical dropout at full load, and operation across 2.5 V–18 V input range. It integrates enable control, thermal/current/power limiting, undervoltage lockout, and delivers 87 dB PSRR at 120 Hz-optimized for DC-DC post-regulation in industrial power supplies.

For engineers reviewing the LDL212PVR datasheet, LDL212PVR pinout, LDL212PVR application, or LDL212PVR equivalent, this page provides verified pin functions, real-world SMPS/point-of-load use cases, confirmed thermal and transient performance data, and validated alternative LDOs with documented voltage-range and package differences.

Technical Context

The LDL212PVR implements a precision bandgap-referenced op-amp control loop with internal bias generator and RC-filtered feedback path, enabling stable regulation under fast load transients and high ripple rejection. Its architecture supports both fixed-output and adjustable configurations via dedicated SENSE/ADJ pin routing.

Thermal protection triggers at 175 °C with 25 °C hysteresis; current limiting engages at 1.5–2 A short-circuit threshold; UVLO activates below 2.3 V with 200 mV hysteresis. The device operates over −40 °C to +125 °C junction temperature with internally limited quiescent current (250–380 µA).

Key Specifications

Pinout & Package

LDL212PVR is packaged in DFN6 (3×3 mm) with exposed thermal pad, requiring solder connection to PCB ground plane for optimal thermal performance (θ_JA = 55 °C/W). Pinout matches SO-8 and DFN6 (2×2) variants but differs in physical layout and thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73312PDBVR and NCP1117DT50RKG, LDL212PVR uniquely combines 1.2 A current capability, 350 mV dropout, integrated enable, and 87 dB PSRR in a thermally optimized DFN6 (3×3) package-making it the only option for high-current, noise-sensitive, and sequenced power domains.

Availability

LDL212PVR is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, point-of-load regulation, and SMPS post-regulation requiring stable component supply across extended temperature ranges and high PSRR performance.

Supply support for LDL212PVR 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 9001 and AEC-Q200 standards.

LDL212PVR belongs to ST's high-PSRR, low-dropout linear regulator product line, designed specifically for noise-sensitive post-regulation in switched-mode power supplies and industrial control systems.

FAQ

What output voltage range does LDL212PVR support in adjustable mode?

LDL212PVR supports an adjustable output from 1.18 V to VIN − VDROP(MAX), where VDROP(MAX) is 600 mV at 1.2 A and 125 °C. For example, with VIN = 6 V, maximum adjustable output is 5.4 V. The ADJ pin voltage is precisely regulated at 1.18 V ±2%, enabling accurate resistor-divider-based setting.

How does the enable function behave under varying input voltages?

The EN pin has guaranteed logic thresholds: V_EN-HI ≥ 1.2 V and V_EN-LO ≤ 0.4 V across −40 °C to +85 °C and VIN = 2.5–18 V. Input current into EN is ≤1.5 µA at VIN = 18 V, ensuring compatibility with weak-drive GPIOs and minimizing leakage in battery-backed systems.

Can LDL212PVR be used with ceramic output capacitors only?

Yes-stability is ensured with ≥4.7 µF ceramic output capacitors having ESR ≤100 mΩ at 100 kHz. The datasheet's stability plots (Figures 30–31) confirm phase margin >60° across COUT = 4.7–22 µF and ESR = 0.01–100 mΩ, eliminating need for tantalum or electrolytic capacitors.

What thermal derating applies when using the DFN6 (3×3) package on a 2-layer PCB?

With standard JEDEC 2S2P layout (2 oz Cu, 2 internal layers), θ_JA = 55 °C/W. At 1.2 A and 350 mV dropout (0.42 W dissipation), junction rise is ~23 °C above ambient-well within the 125 °C limit. Derating begins only above 100 °C ambient, where output current must be reduced per Figure 16's VDROP vs. temperature curves.