XL78L05A – LDO Regulator – Xinluda

The Xinluda XL78L05A is a fixed +5V, 100mA three-terminal positive linear voltage regulator (78L05A family) in a compact SOT-89 surface-mount package, featuring internal thermal-overload and short-circuit protection.

The XL78L05A from Xinluda is a fixed +5V, three-terminal positive linear voltage regulator belonging to the industry-standard 78L05A family. The “A” grade denotes the tighter ±5% output-voltage tolerance variant. Designed to deliver a stable, regulated 5.0V output at currents up to 100 mA, the XL78L05A requires no external components in most applications and integrates internal current limiting and thermal-overload protection, making it a rugged, cost-effective choice for local on-board regulation.

Housed in a small-footprint SOT-89 surface-mount package (also offered in through-hole TO-92), the XL78L05A is well suited to space-constrained designs that need a simple, drop-in 5V rail derived from a higher unregulated supply.

Key Features

• Fixed positive output voltage: +5.0V (4.8V–5.2V at 25°C; 4.75V–5.25V over full range, ±5% “A” grade)
• Output current up to 100 mA
• Three-terminal design — minimal external components required
• Typical dropout voltage: 1.7V
• Quiescent (bias) current: typically 3 mA (5 mA max)
• Internal short-circuit current limiting
• Internal thermal-overload protection
• Available in SOT-89 surface-mount and TO-92 through-hole packages

Applications

• Local on-card 5V regulation for logic and microcontrollers
• Sensor and analog front-end supply rails
• Consumer and industrial electronics
• Reference and bias supplies for low-power subsystems
• Legacy board redesigns and 78L05 second-source replacements

Why Source XL78L05A from Pacific Component Xchange

The XL78L05A is a Xinluda-branded part with little to no authorized-distributor stock, making it difficult to source through mainstream channels. Pacific Component Xchange specializes in hard-to-find and obsolete power-management ICs and can locate the XL78L05A and equivalent 78L05A regulators for your build. Every order is backed by our authenticity and inspection process, with global shipping available to keep your production line moving. Submit an RFQ today for current availability, lead time, and pricing on the XL78L05A — our sourcing team will respond promptly with verified stock options.