Microchip Technology MIC5201-3.0BS

Overview

MIC5201-3.0BS from Microchip Technology is a 3.0 V fixed-output, 100 mA low-dropout (LDO) linear regulator in SOT-23-5 package with thermal shutdown and current limit protection; operates from 2.5 V to 16 V input, delivers 100 mA output current, and maintains ±2% output voltage accuracy over line, load, and temperature.

For engineers reviewing the MIC5201-3.0BS datasheet, MIC5201-3.0BS pinout, MIC5201-3.0BS application, or MIC5201-3.0BS equivalent, key selection factors include dropout voltage at full load, ground pin current vs. load, thermal performance in SOT-23-5, and compatibility with ceramic output capacitors ≥1.0 µF.

Technical Context

The MIC5201-3.0BS uses a PNP pass transistor architecture enabling ultra-low dropout (typically 170 mV at 100 mA), stable operation with small ceramic output capacitors, and fast transient response. It integrates internal current limiting and thermal foldback to prevent damage during overload or high ambient temperature conditions.

Unlike NPN-based LDOs, its PNP topology allows operation with VIN as low as 2.5 V while maintaining regulation at VOUT = 3.0 V, and eliminates need for external compensation components due to inherent stability with 1.0 µF–10 µF ceramic capacitors.

Key Specifications

Pinout & Package

SOT-23-5 surface-mount package with exposed thermal pad (EP); 1.6 mm × 2.9 mm footprint, 1.1 mm height, JEDEC MO-178 compliant; thermal resistance θ_JA = 220°C/W (standard PCB), θ_JC = 120°C/W (with EP soldered).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3002E/TO and TPS76330DBVR, the MIC5201-3.0BS uniquely balances ultra-low dropout, enable control, and SOT-23-5 footprint-making it optimal for space-constrained, battery-sensitive, and power-sequenced applications where VIN may dip close to VOUT.

Availability

MIC5201-3.0BS is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, and automotive body control modules requiring stable component supply across production lifecycles.

Supply support for MIC5201-3.0BS 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

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog, and mixed-signal ICs for embedded control applications.

The MIC5201 series targets space- and power-constrained systems needing precision, low-noise, and low-dropout regulation-especially in battery-powered and thermally limited environments.

FAQ

What is the minimum input voltage required for MIC5201-3.0BS to maintain regulation?

The MIC5201-3.0BS maintains regulation down to VIN = VOUT + V_DO, with typical dropout of 170 mV at 100 mA. Therefore, minimum input voltage is 3.17 V under full load. At lighter loads, dropout decreases - e.g., 55 mV at 10 mA - allowing stable 3.0 V output from as low as 3.055 V input. Always verify against worst-case dropout in the datasheet for design margin.

Can MIC5201-3.0BS operate with a 1 µF ceramic output capacitor?

Yes, the MIC5201-3.0BS is specifically designed for stability with ceramic output capacitors ranging from 1.0 µF to 10 µF. A 1 µF X5R or X7R ceramic capacitor with ESR < 100 mΩ meets the stability criteria and is recommended for space-constrained layouts. Larger values improve transient response but are not required.

Does MIC5201-3.0BS include thermal protection?

Yes, the MIC5201-3.0BS integrates thermal foldback protection. When junction temperature exceeds ~160°C, the device reduces output current to limit power dissipation and prevent permanent damage. This feature activates automatically and recovers once temperature falls below the hysteresis threshold (~140°C). No external components are needed.

What is the quiescent current of MIC5201-3.0BS in shutdown mode?

In shutdown mode (EN pin pulled low), the MIC5201-3.0BS draws ≤1 µA typical quiescent current. This ultra-low shutdown current enables long-term battery storage in always-on systems such as security sensors or asset trackers. The EN pin has CMOS-compatible thresholds and can be driven directly from a microcontroller GPIO.

Is MIC5201-3.0BS compatible with lead-free reflow soldering profiles?

Yes, the MIC5201-3.0BS in SOT-23-5 package is rated for standard lead-free reflow per JEDEC J-STD-020. Peak temperature tolerance is 260°C for 20–40 seconds. The device is RoHS-compliant and halogen-free, meeting IPC Class 3 reliability requirements for industrial and automotive applications.