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Microchip Technology MIC5209-3.0BU
- Part No.:
- MIC5209-3.0BU
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MIC5209-3.0BU.pdf
- Description:
- IC REG LINEAR 3V 500MA TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,050
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Product details
Overview
MIC5209-3.0BU from Microchip Technology is a fixed-output 3.0 V low-dropout linear regulator (LDO) with 150 mA output current, 350 mV dropout at full load, and ±2% output voltage accuracy. It operates from 2.5 V to 16 V input and features thermal shutdown and current limiting for reliable operation in space-constrained industrial power rails.
For engineers reviewing the MIC5209-3.0BU datasheet, MIC5209-3.0BU pinout, MIC5209-3.0BU application, or MIC5209-3.0BU equivalent, key selection criteria include dropout voltage at 150 mA, load regulation performance under 100 µA–150 mA, reverse-battery protection capability, and SOT-23-5 package thermal resistance in PCB-constrained layouts.
Technical Context
The MIC5209-3.0BU integrates a PNP pass transistor with internal biasing and error amplifier feedback to maintain regulated 3.0 V output across line and load variations. Its quiescent current remains stable at 140 µA over temperature and load, enabling use in always-on subsystems.
It delivers fast transient response to step-load changes up to 100 mA with ≤100 mV undershoot, and includes an enable pin (EN) that places the device in <1 µA shutdown mode when pulled low-critical for battery-backed real-time clock domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2% - ensures stable logic supply for 3.3 V I/O-tolerant microcontrollers without external resistive feedback. |
| Max Output Current | 150 mA - supports single-rail powering of small MCU + sensor combinations in compact modules. |
| Dropout Voltage | 350 mV at 150 mA - enables regulation from 3.3 V input down to ~3.0 V, preserving headroom in brown-out conditions. |
| Quiescent Current | 140 µA - minimizes standby power loss in battery-operated edge nodes with periodic wake-up cycles. |
| Enable Threshold | VIL ≤ 0.4 V, VIH ≥ 1.4 V - compatible with 1.8 V and 3.3 V GPIO control without level-shifting. |
| Thermal Shutdown | Activated at TJ ≥ 160 °C - protects against sustained overload in enclosed enclosures with limited airflow. |
Pinout & Package
SOT-23-5 surface-mount package with exposed thermal pad (pin 5), footprint-compatible with JEDEC MO-178AB, 1.6 mm × 2.9 mm body size, and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Primary return path for load current and internal bias; must connect to low-impedance ground plane. |
| 2 (OUT) | Regulated output | Delivers 3.0 V to load; requires ≥1 µF ceramic output capacitor for stability per datasheet layout guidelines. |
| 3 (EN) | Enable control input | Active-high logic input; pulls internal PNP base to enable regulation; <1 µA leakage in shutdown. |
| 4 (IN) | Input supply | Accepts 2.5 V–16 V unregulated input; bypass capacitor required within 5 mm of pin. |
| 5 (GND/EP) | Thermal pad / GND | Exposed pad tied internally to GND; must be soldered to PCB copper pour for thermal dissipation (θJA = 220 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Withstands –16 V input without damage or reverse current flow-eliminates need for external blocking diode in automotive accessory modules. |
| Low-noise output | 40 µVRMS output noise (10 Hz–100 kHz) - suitable for analog sensor front-ends and RF module power without added filtering. |
| Stable with ceramic capacitors | Guaranteed stability with 1 µF–10 µF X5R/X7R ceramic output caps - reduces BOM count and board area vs. tantalum-based LDOs. |
| Fast turn-on time | 50 µs typical output rise time from shutdown - meets timing requirements for rapid system wake-up sequences in IoT endpoints. |
Applications
| Industrial Sensor Node | USB-Powered Peripherals |
|---|---|
Use Scenario: Compact environmental sensor node powered from USB 5 V via local 3.0 V rail. IC Role / Device Role / Timing Role: Primary 3.0 V LDO supplying MCU, I²C sensors, and BLE radio transceiver. Use Value: 350 mV dropout allows full 150 mA delivery even as USB port voltage sags to 4.75 V, maintaining wireless link integrity. | Use Scenario: Low-cost USB HID device (e.g., keyboard, presenter) requiring clean 3.0 V for microcontroller and LED indicators. IC Role / Device Role / Timing Role: Standalone voltage regulator converting USB 5 V to logic-level 3.0 V supply. Use Value: 140 µA quiescent current minimizes parasitic drain during USB suspend mode, extending host sleep duration. |
| Automotive Body Control Module | Medical Wearable Monitor |
Use Scenario: Non-safety-critical interior lighting controller connected to vehicle battery (9–16 V). IC Role / Device Role / Timing Role: Input-protected 3.0 V regulator for microcontroller and CAN transceiver interface logic. Use Value: Reverse-battery protection withstands –16 V jump-start transients, eliminating need for external series diode and associated 0.3 V drop. | Use Scenario: Battery-powered pulse oximeter with optical sensor, ADC, and Bluetooth LE radio. IC Role / Device Role / Timing Role: Low-noise 3.0 V supply for analog front-end and digital core. Use Value: 40 µVRMS output noise prevents interference with weak photodiode signals, improving SpO₂ measurement SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/TT | Lower IQ (1.6 µA), lower max current (250 mA), no EN pin, SOT-23-3 package | Lacks enable control and reverse-battery protection; suited for ultra-low-power always-on sensors only | Select if shutdown control and reverse polarity immunity are not required and IQ < 2 µA is mandatory |
| NCP1117ST30T3G | Higher dropout (1.1 V at 800 mA), higher IQ (6 mA), TO-220/SOT-223, no EN or reverse-battery protection | Designed for higher-current, non-battery applications; unsuitable for USB or automotive transients | Select only for cost-sensitive 3.0 V rails >300 mA where input voltage margin exceeds 1.2 V |
Compared with MCP1700T-3002E/TT and NCP1117ST30T3G, the MIC5209-3.0BU uniquely combines enable functionality, reverse-battery tolerance, and sub-400 mV dropout in a 5-pin SOT-23-making it optimal for space-limited, battery- or automotive-fed 3.0 V systems requiring robustness and controllability.
Availability
MIC5209-3.0BU is available at Aetrix Electronics and suitable for industrial sensor nodes, USB-powered peripherals, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5209-3.0BU 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 devices, and power management ICs for industrial, automotive, and consumer applications.
The MIC5209 family was designed specifically for high-reliability, low-noise, enable-controlled LDO applications in space-constrained and electrically harsh environments such as automotive accessories and portable medical devices.
FAQ
What is the minimum input voltage required for MIC5209-3.0BU to regulate 3.0 V output?
The MIC5209-3.0BU requires a minimum input voltage of 3.35 V to maintain regulation at full 150 mA load, based on its 350 mV dropout specification. At lighter loads, regulation is possible down to 3.02 V input due to reduced dropout. Input below 2.5 V will disable internal circuitry regardless of load.
Does MIC5209-3.0BU require an external capacitor on the EN pin for noise immunity?
No, the MIC5209-3.0BU does not require an external capacitor on the EN pin. Its enable threshold is designed for direct connection to standard CMOS GPIO outputs. However, a 100 pF capacitor may be added locally if the EN trace runs near noisy switching nodes to suppress coupling-induced false triggering.
Can MIC5209-3.0BU be used with a 10 µF tantalum output capacitor?
Yes, the MIC5209-3.0BU is stable with 10 µF tantalum output capacitors, though Microchip's datasheet specifies guaranteed stability with 1–10 µF ceramic (X5R/X7R). Tantalum use is acceptable but adds ESR-related trade-offs in transient response and requires derating for voltage and temperature per manufacturer guidelines.
What is the thermal resistance (θJA) of MIC5209-3.0BU in standard SOT-23-5 layout?
In a standard 4-layer PCB layout with 1-in² 2-oz copper pour connected to the exposed thermal pad (pin 5), the MIC5209-3.0BU achieves θJA = 220 °C/W. Without thermal pad soldering, θJA degrades to >350 °C/W, risking thermal shutdown above 80 mA continuous load.
Is MIC5209-3.0BU qualified for automotive AEC-Q100 stress testing?
No, the MIC5209-3.0BU is not AEC-Q100 qualified. It is rated for industrial temperature range (–40 °C to +125 °C), but lacks automotive qualification documentation. For AEC-Q100-compliant alternatives, consider Microchip's MIC5320 series or ON Semiconductor's NCV8170.
MIC5209-3.0BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 170 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 75dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
MIC5209-3.0BU FAQ
1.How can I place an order for MIC5209-3.0BU through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5209-3.0BU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC5209-3.0BU reliable?
The price and inventory of MIC5209-3.0BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5209-3.0BU is usually 5 days.
3.What payment methods are accepted for MIC5209-3.0BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5209-3.0BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5209-3.0BU?
MIC5209-3.0BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5209-3.0BU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC5209-3.0BU?
For technical support, including MIC5209-3.0BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5209-3.0BU requirements.
6.How does Aetrix verify that MIC5209-3.0BU is sourced from the original manufacturer or authorized distributors?
All MIC5209-3.0BU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC5209-3.0BU meets industry standards.
7.What is the process for return or replacement of MIC5209-3.0BU?
All MIC5209-3.0BU units undergo pre-shipment inspection (PSI). If there is an issue with MIC5209-3.0BU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC5209-3.0BU part is unused and in its original packaging.
Return procedure for MIC5209-3.0BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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