STMicroelectronics LD29300P2MTR

Overview

LD29300P2MTR from STMicroelectronics is an adjustable 3 A low-dropout linear voltage regulator in P²PAK package, featuring 400 mV typical dropout at full load, ±1% output voltage accuracy at 25°C, and logic-controlled electronic shutdown. It delivers stable regulation for post-switching power supplies and battery-powered systems requiring minimal headroom and low ground current.

For engineers reviewing the LD29300P2MTR datasheet, LD29300P2MTR pinout, LD29300P2MTR application, or LD29300P2MTR equivalent, key selection criteria include dropout voltage at 3 A, thermal resistance (R_thJC = 3 °C/W), adjustable output configuration, and shutdown control interface compatibility with 0.8 V/2 V logic thresholds.

Technical Context

The LD29300 operates as a high-current, adjustable LDO with internal current and thermal limiting. Its reference voltage (1.23 V) sets output via external resistor divider, enabling programmable VO = 1.23 V × (1 + R1/R2). Dropout remains ≤400 mV across –40°C to 125°C junction temperature and full 3 A load range.

It integrates a dedicated shutdown control pin (VINH) with 0.8 V logic-low threshold and 2 V logic-high threshold, drawing only 5–10 μA control current. Quiescent current stays below 100 mA at 3 A load and 13 V input, supporting efficient operation in thermally constrained environments.

Key Specifications

Pinout & Package

P²PAK package: surface-mount, thermally enhanced 5-lead power package with exposed drain pad for low thermal resistance (R_thJC = 3 °C/W) and high-current capability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A8300RGRT and ADM7172ACPZ-R7, the LD29300P2MTR offers superior thermal performance (R_thJC = 3 °C/W) and robust 3 A capability at moderate cost, making it optimal for thermally demanding, high-current industrial and consumer power rails.

Availability

LD29300P2MTR is available at Aetrix Electronics and suitable for post-regulation in SMPS, portable battery systems, monitor power supplies, and TV series regulators requiring stable component supply and long-term manufacturability.

Supply support for LD29300P2MTR 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 microcontrollers, power management ICs, sensors, and automotive-grade components.

The LD29300 belongs to ST's high-current LDO family, engineered for industrial and consumer power systems where thermal efficiency, reliability under overload, and adjustable output flexibility are critical design requirements.

FAQ

What is the minimum input voltage required for LD29300P2MTR to regulate a 3.3 V output?

The minimum input voltage is determined by dropout: VI(min) = VO + V_DO. With 3.3 V output and 400 mV typical dropout at 3 A, VI must be ≥3.7 V. At worst-case 500 mV dropout (per design margin), 3.8 V input ensures regulation across temperature and load extremes.

Can LD29300P2MTR be used without an external resistor divider?

No - the LD29300P2MTR is an adjustable regulator requiring external R1/R2 to set output voltage per VO = 1.23 V × (1 + R1/R2). There is no fixed-output variant in this order code; the "ADJ" in device summary confirms its adjustable nature.

How does the VINH pin behave during power-up sequencing?

VINH is an active-high enable pin. The regulator remains in shutdown until VINH exceeds 2 V. During slow-ramp power-up, it activates only after VINH crosses the 2 V threshold, preventing output glitches. Input hysteresis is not specified, so clean logic-level drive is recommended.

Is the P²PAK package RoHS-compliant and lead-free?

Yes - STMicroelectronics states ECOPACK® compliance for this device. The P²PAK package meets RoHS Directive 2011/65/EU and is lead-free, with termination finish specified as matte tin (Sn) per manufacturer documentation.