STMicroelectronics LD29150V80

Overview

LD29150V80 from STMicroelectronics is a 1.5 A, fixed-output (0.8 V) low-dropout linear regulator in PPAK package, designed for high-current post-regulation and battery-powered systems requiring ultra-low dropout (0.4 V typ. at 1.5 A) and tight output accuracy (±1% at 25 °C). It integrates thermal shutdown, current limiting, and logic-controlled electronic shutdown.

For engineers reviewing the LD29150V80 datasheet, LD29150V80 pinout, LD29150V80 application, or LD29150V80 equivalent, this page delivers verified electrical specs, real-world use cases in power supply post-regulation and portable electronics, and validated alternative options with documented functional differences.

Technical Context

The LD29150V80 operates as a single-output, fixed-voltage LDO with internal reference (1.23 V), adjustable via external resistor divider only in ADJ variants - the V80 variant uses factory-trimmed internal feedback for 0.8 V output. Its control loop maintains regulation across input voltages from 2.5 V to 30 V, with automatic shutdown above 14 V.

It employs a PMOS pass transistor architecture enabling near-zero ground current at light loads and stable operation with 10 µF ceramic output capacitance. The inhibit (INH) pin supports TTL/CMOS-compatible enable control, allowing system-level power sequencing and standby mode management.

Key Specifications

Pinout & Package

LD29150V80 is housed in a thermally enhanced PPAK (Power Package) surface-mount package with exposed thermal pad, optimized for high-power density PCB layouts and efficient heat transfer to copper planes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSM1080 and TPS7A8300RGRT, LD29150V80 uniquely balances 1.5 A capability, integrated enable, and PPAK thermal performance in a compact footprint-making it optimal for space-constrained, battery-sensitive designs needing both precision and controllability.

Availability

LD29150V80 is available at Aetrix Electronics and suitable for power supply post-regulation, portable computing, FPGA core supply, and industrial controller standby power requiring stable component supply and long-term manufacturability.

Supply support for LD29150V80 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, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

The LD29150 series belongs to ST's high-current LDO portfolio, engineered specifically for post-regulation in mixed-signal systems where ultra-low dropout, low noise, and robust protection are mandatory.

FAQ

What is the minimum input voltage required for LD29150V80 to regulate at 0.8 V?

The LD29150V80 requires a minimum input voltage of 2.5 V to maintain regulation, per its absolute maximum ratings table and electrical characteristics for the ADJ variant (which shares the same internal architecture). At 1.5 A load, the practical minimum is 1.2 V + 0.4 V = 1.6 V, but 2.5 V ensures full specification compliance across temperature and line/load conditions.

Does LD29150V80 require an external capacitor on the INH pin?

No external capacitor is required on the INH pin. The INH input is a CMOS-compatible digital control terminal with leakage current ≤10 µA and logic thresholds defined at 0.8 V (low) and 2 V (high); it functions reliably with direct connection to MCU GPIO or open-drain drivers without filtering.

Can LD29150V80 be used with ceramic output capacitors?

Yes - the LD29150V80 is explicitly characterized and stabilized with 10 µF ceramic output capacitors (X5R/X7R), as confirmed in Figure 18 (Stability vs. CO) and typical application circuits. ESR independence eliminates need for tantalum or aluminum electrolytic types.

Is the exposed thermal pad on the PPAK package electrically connected?

Yes, the exposed thermal pad on the LD29150V80 PPAK package is internally connected to GND. ST's package drawings and assembly guidelines require soldering the pad directly to a PCB ground plane for both thermal performance and electrical safety - floating the pad violates thermal design rules and risks overheating.