Voltage Regulators & LDOs

Q: What is the difference between a linear voltage regulator and an LDO voltage regulator?

A linear voltage regulator reduces an input voltage to a lower, stable output by dissipating excess energy as heat. A Low-Dropout (LDO) regulator is a refined type of linear regulator that can maintain regulation even when the difference (dropout) between input and output voltage is very small — often as low as 100–300 mV. This makes LDOs ideal for battery-powered and low-headroom applications where a standard linear regulator would drop out of regulation.

Q: Which package types are available in this collection — SOT-89, SOT-223, or others?

Our voltage regulator and LDO IC collection covers a broad range of industry-standard SMD packages, including SOT-89, SOT-223, SSOP-24, SOP-16, and SOT-23. Whether you need a small footprint for a compact PCB or a larger package for better thermal dissipation, you'll find suitable options across our product listings.

Q: Are bulk reels available for high-volume PCB production?

Yes! We offer 1,000-piece SMD reels for popular regulator families such as the AMS1117 SOT-89 and the 78L Series SOT-89, making them perfect for automated pick-and-place assembly and reducing per-unit component costs in production runs.

Q: What output voltages are covered by the voltage regulators in this collection?

Our collection spans a wide range of fixed and adjustable output voltages, including 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5 V, 8 V, 9 V, and more. Multi-voltage packs and adjustable LDOs like the TLV1117LV series give engineers the flexibility to cover multiple design requirements from a single order.

Whether you're designing a precision power supply, stabilizing a microcontroller rail, or prototyping a battery-powered device, voltage regulators and Low-Dropout (LDO) regulators are the backbone of reliable power management. Our curated collection of linear voltage regulator ICs spans a wide range of output voltages, current ratings, and industry-standard packages — including SOT-89, SOT-223, SSOP, and SOP — so you can find exactly the right component for your PCB design. From convenient 10-piece developer packs to cost-efficient 1,000-piece production reels, we stock the quantities you need at every stage of your project.

Why Choose a Linear LDO Regulator?

LDO regulators provide clean, stable output voltage with minimal noise — making them ideal for analog circuits, RF modules, sensors, and any application where a switching regulator's EMI would be a problem. With low dropout voltages and fast transient response, modern LDOs keep your system running efficiently even when the input voltage barely exceeds the target output. Browse our best-selling ICs below to get started:

1000PCS AMS1117 LDO Voltage Regulator IC SOT-89 SMD Multi-Voltage — a production-ready reel of the industry-favourite AMS1117 in multiple voltage options.
10-Pack TLV1117LV SOT-223 LDO Voltage Regulators 1.2V–3.3V — Texas Instruments-compatible LDOs in the robust SOT-223 footprint, perfect for higher-current rails.
10-Pack LD59030DTPU33R 3.3V 300mA Linear Voltage Regulator IC — a compact 3.3 V regulator well-suited for MCU and IoT applications.
10-Pack NCV1117 NCV303 NCV4294 Voltage Regulator IC Components — ON Semiconductor-compatible regulators for versatile power-management designs.
1000pcs 78L Series SMD Voltage Regulator SOT-89 Reel — a full production reel of the classic 78L series for high-volume manufacturing runs.

Our Voltage Regulator Categories at a Glance

Fixed-Output LDOs: 3.3 V, 5 V, 8 V, 9 V, and more — in both through-hole-friendly and SMD packages.
Adjustable LDOs: Dial in the exact output voltage your circuit demands with adjustable-output devices like the TLV1117LV series.
Multi-Voltage Packs: Save on BOM cost with mixed-voltage assortment packs ideal for R&D labs and educational use.
Bulk Reels: 1,000-piece SMD reels for seamless pick-and-place assembly in production environments.

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What is the difference between a linear voltage regulator and an LDO voltage regulator?

A: A linear voltage regulator reduces an input voltage to a lower, stable output by dissipating excess energy as heat. A Low-Dropout (LDO) regulator is a refined type of linear regulator that can maintain regulation even when the difference (dropout) between input and output voltage is very small — often as low as 100–300 mV. This makes LDOs ideal for battery-powered and low-headroom applications where a standard linear regulator would drop out of regulation.

Q: Which package types are available in this collection — SOT-89, SOT-223, or others?

A: Our voltage regulator and LDO IC collection covers a broad range of industry-standard SMD packages, including SOT-89, SOT-223, SSOP-24, SOP-16, and SOT-23. Whether you need a small footprint for a compact PCB or a larger package for better thermal dissipation, you'll find suitable options across our product listings.

Q: Are bulk reels available for high-volume PCB production?

A: Yes! We offer 1,000-piece SMD reels for popular regulator families such as the AMS1117 SOT-89 and the 78L Series SOT-89, making them perfect for automated pick-and-place assembly and reducing per-unit component costs in production runs.

Q: What output voltages are covered by the voltage regulators in this collection?

A: Our collection spans a wide range of fixed and adjustable output voltages, including 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5 V, 8 V, 9 V, and more. Multi-voltage packs and adjustable LDOs like the TLV1117LV series give engineers the flexibility to cover multiple design requirements from a single order.