onsemi L88M05T-TL-E

Overview

L88M05T-TL-E from onsemi is a monolithic linear low-dropout (LDO) voltage regulator IC delivering a fixed 5 V output at up to 500 mA, with a typical dropout voltage of 0.4 V at full load and thermal shutdown/short-circuit protection - optimized for compact audio-visual and office automation power supplies.

For engineers reviewing the L88M05T-TL-E datasheet, pinout, applications, or equivalent options, key selection criteria include its TP3H package thermal performance, 5.8–17 V input range, ±0.5 mV/°C output voltage temperature coefficient, and Pb-free tape-and-reel packaging (700 pcs/reel).

Technical Context

The L88M05T-TL-E integrates an error amplifier, reference voltage source, start-up circuit, thermal protector, and short-circuit protector in a single monolithic structure. Its internal architecture enables stable regulation under varying load (0–500 mA) and input conditions (5.8–17 V), with ripple rejection of 65 dB at 120 Hz and 17 V input.

Designed for surface-mount use on PCBs with copper-clad areas ≥36 mm², it achieves up to 6.25 W allowable power dissipation when mounted with an infinite heat sink, while maintaining 125 °C/W junction-to-ambient thermal resistance in free-air conditions.

Key Specifications

Pinout & Package

Package: TP3H (IPAK variant, case 369AF), surface-mount, Pb-free, thermally enhanced plastic package with exposed collector tab for improved heat transfer.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC78L05ACDR2G and NCP1117ST50T3G, the L88M05T-TL-E uniquely balances 500 mA delivery, 0.4 V dropout, TP3H thermal efficiency, and integrated protection - making it optimal for space-constrained 5 V systems where input headroom and reliability are critical.

Availability

L88M05T-TL-E is available at Aetrix Electronics and suitable for home audio amplifiers, office printers & scanners, and digital set-top boxes requiring stable component supply, Pb-free compliance, and tape-and-reel logistics support.

Supply support for L88M05T-TL-E 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The L88M05T-TL-E belongs to the L88M00T Series of monolithic linear LDO regulators, designed specifically for compact, high-reliability power supplies in audio-visual and office automation equipment.

FAQ

What is the maximum input voltage rating for the L88M05T-TL-E?

The L88M05T-TL-E has an absolute maximum input voltage rating of 18 V. However, its recommended operating input voltage range is 5.8 V to 17 V. Exceeding 18 V may cause permanent damage. The device is optimized for use with unregulated 12 V supplies, and its 0.4 V dropout enables efficient operation even near the lower end of this range. Always observe derating guidelines per the datasheet's thermal curves when operating near maximum ratings.

Does the L88M05T-TL-E require external capacitors, and what values are recommended?

Yes, the L88M05T-TL-E requires both input and output capacitors for stability. A minimum 1 μF ceramic capacitor is required at VIN, placed as close as possible to the input pin. For VOUT, ≥100 μF low-temperature-coefficient capacitor (e.g., tantalum) is mandatory to prevent oscillation at low temperatures. These values are specified in the official test circuit and validated across the full operating temperature range. Using smaller or inappropriate dielectric types risks instability or regulation failure.

Is the L88M05T-TL-E pin-compatible with other regulators in the L88M00T series?

Yes, all variants in the L88M00T series - including L88M05T-TL-E, L88M00T, and L88M12T - share identical TP3H package pinout (VIN, GND, VOUT) and footprint. Output voltage is the sole functional difference between members; no PCB redesign is needed when substituting within the series for different voltage requirements. This simplifies design reuse and inventory consolidation across product families.

What thermal performance can be expected from the L88M05T-TL-E on a standard PCB?

On a glass-epoxy PCB with 740 mm² copper-clad area (18 μm thickness), the L88M05T-TL-E supports ~2.5 W allowable power dissipation at 25 °C ambient. With 2000 mm² copper, dissipation rises to ~4.5 W. In free air (no heatsink), it is rated for 1.0 W. These values assume proper soldering per onsemi's SOLDERING RM/D manual. Thermal performance is directly tied to copper area and board stack-up - not just package type.

How does the L88M05T-TL-E handle reverse polarity on the input?

The L88M05T-TL-E lacks reverse-voltage protection. If VIN is connected negative relative to GND (i.e., reversed polarity), excessive current will flow through internal junctions, potentially causing immediate failure. External protection - such as a series Schottky diode or P-channel MOSFET reverse-polarity circuit - must be added in systems where incorrect input connection is possible. This limitation is explicitly noted in the datasheet's safety warnings.