Microchip MIC5216-0YM5-TR 5V Low-Dropout (LDO) Voltage Regulator: Datasheet, Application Circuit, and Specifications
In the world of electronic design, stable and clean power is non-negotiable. The Microchip MIC5216-0YM5-TR is a robust 5V low-dropout voltage regulator (LDO) engineered to deliver precisely that. This component is a cornerstone for powering sensitive circuitry, microcontrollers, and sensors where voltage ripple and noise must be minimized. This article delves into its key specifications, a typical application circuit, and highlights from its datasheet.
Key Specifications and Features
The MIC5216 is a high-performance LDO capable of supplying a steady 150mA of continuous output current. Its most critical feature is its extremely low dropout voltage—typically 175mV at 100mA load—which allows it to maintain regulation even when the input voltage dips very close to the 5V output level. This maximizes efficiency and is invaluable in battery-powered applications where every millivolt counts.
Furthermore, the regulator boasts exceptional line and load regulation, ensuring a stable 5V output despite fluctuations in input voltage or current demand. A paramount feature for noise-sensitive applications like audio and RF circuits is its very low output noise performance. The device also incorporates crucial protection mechanisms, including current limiting and thermal shutdown, safeguarding both the regulator and the load it powers from damage under fault conditions.
The "-0YM5-TR" suffix denotes the specific variant: a 5.0V output in a compact, surface-mount SOT-23-5 package supplied on tape and reel for high-volume assembly.
Typical Application Circuit
Implementing the MIC5216-0YM5-TR is remarkably straightforward, requiring only a few external components for most applications. A standard circuit is outlined below:
1. Input Capacitor (C_IN): A 1µF ceramic capacitor placed close to the input pin (IN) is recommended to improve transient response and stability. For inputs from a noisy supply, a larger capacitor value may be beneficial.
2. Output Capacitor (C_OUT): The regulator is stable with a small, low-ESR 1µF ceramic capacitor on the output (OUT). This capacitor is essential for ensuring stability and managing transient load responses.
3. Enable Pin (EN): This pin allows for logic-level control of the regulator's output. Driving it high (>1.5V) enables the output; pulling it low (<0.3V) places the device in a low-quiescent current shutdown mode. If this feature is not required, the EN pin can be directly tied to the input voltage (VIN).
The bypass capacitor (C_BYP) pin, unique to the SOT-23-5 package, is used to further reduce output noise. Connecting a 0.01µF capacitor from this pin to ground significantly lowers the output noise figure.
Datasheet Insights
The manufacturer's datasheet is the ultimate source of truth. Key details to extract include:
Absolute Maximum Ratings: Never exceed the input voltage of 20V or the specified operating temperature range.
Electrical Characteristics: Detailed tables provide precise values for dropout voltage, quiescent current, line/load regulation, and output noise under various conditions.
Thermal Information: The junction-to-ambient thermal resistance (θJA) is critical for calculating the maximum power dissipation (P_D = (V_IN - V_OUT) I_OUT) and ensuring the die temperature does not exceed its limit, triggering thermal shutdown.
The Microchip MIC5216-0YM5-TR is an exceptional choice for designers seeking a reliable, low-noise, and easy-to-use 5V LDO. Its very low dropout voltage extends battery life in portable devices, while its minimal external component count and built-in protections make it a robust and simple solution for a vast array of applications, from consumer electronics to industrial control systems.
Keywords:
Low-Dropout (LDO) Voltage Regulator
5V Output
Low Noise
Low Dropout Voltage
SOT-23-5 Package
