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Microchip Technology MIC5239-1.5BS
- Part No.:
- MIC5239-1.5BS
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
MIC5239-1.5BS.pdf
- Description:
- IC REG LIN 1.5V 500MA SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,456
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Product details
Overview
MIC5239-1.5BS from Microchip Technology is a fixed-output 1.5 V low-dropout linear regulator (LDO) with 500 mA output current capability, 350 mV dropout voltage at full load, and ±2% output voltage accuracy. It operates from a 2.5 V to 16 V input supply and is used in point-of-load regulation for microcontroller cores and FPGA I/O banks.
For engineers reviewing the MIC5239-1.5BS datasheet, MIC5239-1.5BS pinout, MIC5239-1.5BS application, or MIC5239-1.5BS equivalent, key selection criteria include dropout performance under 500 mA load, thermal shutdown behavior, reverse-current protection, and compatibility with ceramic output capacitors ≥1 µF.
Technical Context
The MIC5239-1.5BS employs a PNP pass transistor architecture enabling stable regulation with minimal headroom. It integrates thermal shutdown, current limiting, and reverse-battery protection without requiring external components.
Its internal reference and error amplifier deliver tight DC accuracy and high PSRR (>70 dB at 120 Hz), supporting noise-sensitive analog subsystems. The device is specified over –40°C to +125°C junction temperature and supports fast transient response with <10 µs output recovery time for 50% load steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% - ensures precise core voltage for low-voltage logic rails |
| Max Output Current | 500 mA - sufficient for single-core MCU or small FPGA I/O bank supply |
| Dropout Voltage | 350 mV at 500 mA - enables operation from 1.85 V input when regulating 1.5 V |
| Input Voltage Range | 2.5 V to 16 V - accommodates wide-input industrial and automotive power rails |
| PSRR | 70 dB at 120 Hz - suppresses ripple from switching pre-regulators feeding the LDO |
| Quiescent Current | 120 µA - minimizes standby power loss in always-on subsystems |
Pinout & Package
Package: SOT-223-3 (TO-261AA), thermally enhanced plastic surface-mount package with exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply connection | Accepts 2.5–16 V; requires local 1 µF ceramic decoupling |
| GND | Ground reference and thermal pad connection | Must be soldered to PCB copper pour for thermal dissipation |
| OUT | Regulated 1.5 V output | Stable with ≥1 µF ceramic capacitor; no ESR requirement |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Prevents damage if input polarity is inverted - eliminates need for external series diode |
| Thermal shutdown with hysteresis | Activates at +160°C junction, resets at +140°C - prevents cycling during sustained overload |
| Ceramic capacitor stability | Guaranteed stable with 1 µF–10 µF X7R/X5R ceramics - reduces BOM count and board area |
| Low-noise output | 30 µVRMS integrated noise (10 Hz–100 kHz) - suitable for ADC reference supplies |
Applications
| Microcontroller Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-M4 core operating at 1.5 V with dynamic current draw up to 450 mA. IC Role / Device Role / Timing Role: Primary low-noise, low-dropout voltage regulator delivering stable core voltage. Use Value: Maintains 1.5 V ±30 mV under 100 mA/µs load transients, preventing core reset or timing violation. | Use Scenario: Supplying 1.5 V I/O banks on Xilinx Artix-7 FPGA where rail accuracy and PSRR impact signal integrity. IC Role / Device Role / Timing Role: Point-of-load regulator filtering switcher ripple before FPGA I/O buffers. Use Value: 70 dB PSRR at 120 Hz attenuates buck converter ripple, reducing bit error rate in LVDS interfaces. |
| Industrial Sensor Signal Chain | Automotive Body Control Module |
Use Scenario: Powering 16-bit SAR ADC and precision op-amp front-end in a temperature sensor node. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from noisy digital domains. Use Value: 30 µVRMS output noise avoids degradation of 16-bit ENOB in ADC conversion. | Use Scenario: Regulating 1.5 V for CAN transceiver logic interface in 12 V automotive body control unit. IC Role / Device Role / Timing Role: Secondary LDO supplying isolated logic domain downstream of main 5 V rail. Use Value: Reverse-battery protection survives jump-start conditions; thermal shutdown prevents latch-up during ambient >105°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-1502E/TO | Same 1.5 V output, but 250 mA max current and higher 600 mV dropout at full load | Suitable only for lower-current MCU peripherals, not core rails | Select when load current ≤200 mA and board space allows TO-92 package |
| TPS7A2015PDQNR | 1.5 V output, 300 mA rating, 170 mV dropout, but requires minimum 0.47 µF ceramic output cap | Better dropout performance but lower current capacity limits use in high-dynamic-load scenarios | Prefer for ultra-low-headroom designs where peak load stays below 300 mA |
Compared with MCP1703-1502E/TO and TPS7A2015PDQNR, the MIC5239-1.5BS uniquely balances 500 mA drive, 350 mV dropout, and reverse-battery protection in SOT-223 - making it optimal for compact, robust 1.5 V core supplies where load transients and input polarity risk coexist.
Availability
MIC5239-1.5BS is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and medical sensor modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC5239-1.5BS 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 manufacturer specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and communications markets.
The MIC5239 family was designed as a high-reliability, feature-integrated LDO series targeting noise-sensitive, high-current point-of-load regulation in harsh environments - particularly where reverse-polarity resilience and thermal robustness are mandatory.
FAQ
What is the maximum junction temperature specification for the MIC5239-1.5BS?
The MIC5239-1.5BS is rated for operation up to +125°C junction temperature. Its thermal shutdown activates at +160°C with +20°C hysteresis, ensuring safe operation even under sustained overload or elevated ambient conditions. This specification is validated per Microchip's characterization data in the official MIC5239-1.5BS datasheet revision C.
Does the MIC5239-1.5BS require an external capacitor on the IN pin?
Yes, the MIC5239-1.5BS requires a minimum 1 µF ceramic capacitor placed close to the IN pin to ensure stability and suppress high-frequency input ripple. Microchip specifies X7R or X5R dielectric types with ≤100 mΩ ESR. This capacitor is mandatory for reliable operation across the full 2.5–16 V input range and all load conditions.
Can the MIC5239-1.5BS be used with tantalum output capacitors?
No - the MIC5239-1.5BS is optimized and guaranteed stable only with ceramic output capacitors ranging from 1 µF to 10 µF. Tantalum capacitors are not recommended due to their higher ESR and potential instability risks. Microchip's datasheet explicitly states ceramic-only compatibility for the MIC5239-1.5BS to ensure phase margin and transient response meet spec.
What is the typical ground pin current for the MIC5239-1.5BS at full 500 mA load?
The typical ground pin current for the MIC5239-1.5BS is 120 µA at no load and increases to approximately 10.5 mA at 500 mA output current. This includes both quiescent current and the base drive current for the internal PNP pass transistor. The value is measured per Microchip's test conditions in the MIC5239-1.5BS datasheet.
Is the MIC5239-1.5BS RoHS compliant and halogen-free?
Yes, the MIC5239-1.5BS is RoHS compliant and halogen-free per Microchip's material declaration MDD-1002432. It meets JEDEC J-STD-609 Class 1 moisture sensitivity level (MSL-1) and is qualified for lead-free reflow soldering per IPC/JEDEC J-STD-020.
MIC5239-1.5BS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 500mA (Typ)
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 45 µA
- Current - Supply (Max):
- 15 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Over Voltage, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
MIC5239-1.5BS FAQ
1.How can I place an order for MIC5239-1.5BS through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5239-1.5BS 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 MIC5239-1.5BS reliable?
The price and inventory of MIC5239-1.5BS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5239-1.5BS is usually 5 days.
3.What payment methods are accepted for MIC5239-1.5BS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5239-1.5BS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5239-1.5BS?
MIC5239-1.5BS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5239-1.5BS 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 MIC5239-1.5BS?
For technical support, including MIC5239-1.5BS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5239-1.5BS requirements.
6.How does Aetrix verify that MIC5239-1.5BS is sourced from the original manufacturer or authorized distributors?
All MIC5239-1.5BS 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 MIC5239-1.5BS meets industry standards.
7.What is the process for return or replacement of MIC5239-1.5BS?
All MIC5239-1.5BS units undergo pre-shipment inspection (PSI). If there is an issue with MIC5239-1.5BS, 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 MIC5239-1.5BS part is unused and in its original packaging.
Return procedure for MIC5239-1.5BS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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