STMicroelectronics LD56020M120R

Overview

LD56020M120R from STMicroelectronics is a high-accuracy, ultra-low-noise 200 mA low-dropout (LDO) voltage regulator with fixed 1.2 V output, designed for power-sensitive analog and RF circuits. It operates from 1.1 V to 5.5 V input, delivers ≤190 mV dropout at 200 mA, achieves ±2% output tolerance over temperature, and features 8.8 µVRMS noise (10 Hz–100 kHz), logic-controlled shutdown, and active output discharge - ideal for image sensor biasing in compact mobile modules.

For engineers reviewing the LD56020M120R datasheet, LD56020M120R pinout, LD56020M120R application, or LD56020M120R equivalent, key selection criteria include ultra-low noise performance, thermal foldback protection, dual-package availability (SOT23-5L and Flip-chip4), enable-controlled quiescent current <1 µA, and compatibility with 0.7–1 µF ceramic capacitors for space-constrained battery-powered designs.

Technical Context

The LD56020M120R implements a PMOS pass transistor architecture enabling ultra-low dropout and near-zero reverse current during shutdown. Its internal bandgap reference and error amplifier deliver tight load/line regulation (≤5 mV static load regulation, ≤0.1 %/V line regulation) across –40 °C to 125 °C junction temperature.

It integrates thermal shutdown (160 °C trip, 20 °C hysteresis), short-circuit foldback limiting (100–300 mA depending on condition), and an internally pulled-down EN pin (1 MΩ) supporting logic-level control. The exposed pad must be connected to GND for thermal and electrical integrity in both SOT23-5L and Flip-chip4 packages.

Key Specifications

Pinout & Package

LD56020M120R is available in two compact packages: SOT23-5L (2.92 mm × 2.80 mm × 1.10 mm) and Flip-chip4 (0.69 mm × 0.69 mm × 0.25 mm), both requiring the exposed thermal pad to be soldered to a GND plane for optimal thermal performance and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B122MR-G and RT9080-12PU5, LD56020M120R uniquely combines ultra-low noise (8.8 µVRMS), dual-package flexibility (including 0.65 mm² Flip-chip4), active discharge, and integrated thermal/short-circuit protection - making it optimal for high-fidelity RF and imaging power rails where size, noise, and reliability are co-prioritized.

Availability

LD56020M120R is available at Aetrix Electronics and suitable for smartphone image sensor biasing, VCO power supply, tablet camera modules, and low-power IoT sensor nodes requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for LD56020M120R 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 sensor solutions for automotive, industrial, and consumer markets.

LD56020 belongs to ST's ultra-low-noise LDO portfolio targeting battery-powered portable electronics - engineered specifically for noise-sensitive analog/RF subsystems where traditional LDOs introduce unacceptable jitter or ripple.

FAQ

What is the minimum input voltage required for LD56020M120R to maintain regulation at 200 mA load?

The LD56020M120R requires VIN ≥ VOUT + VDROP to remain in regulation. With VOUT = 1.2 V and max dropout of 190 mV at 200 mA, the minimum functional input is 1.39 V. However, per datasheet Table 4, guaranteed operation starts at VIN = 1.1 V - meaning it can regulate down to ~1.29 V under typical conditions, but 1.39 V ensures margin across temperature and process variation.

Can LD56020M120R be used with ceramic capacitors smaller than 0.7 µF?

No. The datasheet specifies CIN and COUT ≥0.7 µF (typical 1 µF) with ESR between 5 mΩ and 500 mΩ for guaranteed stability. Using smaller capacitors risks oscillation or poor transient response, especially under load steps. ST validates performance only within this capacitor range - deviations require full loop analysis and bench validation.

Is the NC pin on LD56020M120R electrically isolated or should it be grounded?

The NC pin is not internally connected and has no electrical function. Per Table 1, it may be left floating or connected to GND - neither choice affects regulation, noise, or thermal performance. Grounding it poses no risk and may improve mechanical anchoring during reflow, but it provides no electrical benefit.

Does LD56020M120R support adjustable output voltage via external resistors?

No. LD56020M120R is a fixed-output variant (1.2 V). Adjustable versions (e.g., LD56020MxxxA) exist but require different order codes and use a feedback resistor divider. This part lacks FB or ADJ pins - its internal reference and error amplifier are trimmed for 1.2 V only, and no external adjustment is possible.