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Microchip Technology MIC5203-2.8BM5TR
- Part No.:
- MIC5203-2.8BM5TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5203-2.8BM5TR.pdf
- Description:
- IC REG LINEAR LDO POS VOLT
- Quantity:
- Payment:
- Shipping:
Inventory:11,983
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Product details
Overview
MIC5203-2.8BM5TR from Microchip Technology is a 150 mA low-dropout linear regulator (LDO) with fixed 2.8 V output, 350 mV dropout at 150 mA, ±2% output voltage accuracy, and integrated thermal shutdown and current limit protection. It powers microcontroller I/O rails in portable instrumentation requiring stable low-noise supply.
For engineers reviewing the MIC5203-2.8BM5TR datasheet, MIC5203-2.8BM5TR pinout, MIC5203-2.8BM5TR application, or MIC5203-2.8BM5TR equivalent, key selection criteria include dropout voltage at load, ground pin current, reverse polarity protection capability, and thermal performance in SOT-23-5 packages.
Technical Context
The MIC5203-2.8BM5TR uses a PNP pass transistor architecture enabling ultra-low dropout and high PSRR (>70 dB at 1 kHz). Its internal bandgap reference and error amplifier deliver tight regulation across line (2.5 V to 16 V input), load (1 mA to 150 mA), and temperature (−40°C to +125°C) variations.
It integrates undervoltage lockout (UVLO) that disables output below ~2.3 V input and features a logic-compatible enable pin (active-high) for system-level power sequencing control in battery-powered edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% - ensures consistent logic-level compatibility with 2.8 V I/O domains of ARM Cortex-M0+ MCUs. |
| Max Output Current | 150 mA - supports moderate-current peripherals like ADCs, DACs, and sensor interfaces without external boost. |
| Dropout Voltage | 350 mV at 150 mA - enables operation down to 3.15 V input, extending usable battery life in single-cell Li-ion systems. |
| Ground Pin Current | 1.2 mA at 150 mA load - minimizes quiescent loss in always-on subsystems such as real-time clocks or wake-up monitors. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding mixed-signal circuits. |
| Operating Temp | −40°C to +125°C - qualified for industrial and automotive under-hood sensor modules. |
Pinout & Package
Package: SOT-23-5 - surface-mount, thermally enhanced plastic package with exposed pad (EP) for improved heat dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.5 V to 16 V unregulated input; requires local 1 µF ceramic decoupling. |
| GND | Power ground reference | Common return path for load current and bias circuitry; connects to EP for thermal conduction. |
| EN | Enable control input | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 1 µA. |
| OUT | Regulated output | Delivers stable 2.8 V; requires 1 µF ceramic output capacitor for stability per datasheet. |
| ADJ/SENSE | Feedback node | Internally connected to 2.8 V reference; not user-accessible - device is fixed-output only. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 350 mV at full 150 mA load enables use with depleting batteries or low-headroom supplies. |
| Integrated thermal shutdown | Activates at +160°C junction temperature to prevent damage during sustained overload or poor heatsinking. |
| Reverse-battery protection | Withstands −16 V input without sinking current - eliminates need for external blocking diode in automotive jump-start scenarios. |
| High PSRR | 70 dB at 1 kHz and 50 dB at 100 kHz suppresses ripple from switching regulators powering mixed-signal SoCs. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG front-end powered by coin cell or small Li-ion battery. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying analog signal chain and low-power MCU core. Use Value: 350 mV dropout extends operational time by >12% compared to 500 mV LDOs under same discharge profile. | Use Scenario: DIN-rail mounted analog input module operating in factory ambient up to +70°C. IC Role / Device Role / Timing Role: Local 2.8 V rail generator for precision 24-bit sigma-delta ADC reference and buffer stages. Use Value: ±2% output accuracy and 70 dB PSRR ensure <0.01% gain error contribution and clean reference voltage under noisy 24 V DC bus conditions. |
| Automotive Body Control Units | Smart Meter Data Acquisition |
Use Scenario: Interior lighting controller exposed to cold-crank (−16 V reverse) and load-dump transients. IC Role / Device Role / Timing Role: Post-regulator for microcontroller I/O and CAN transceiver VIO supply. Use Value: Reverse-battery protection eliminates external diode, reducing BOM count and board area by 12 mm². | Use Scenario: AMI smart meter with optical pulse interface and RF mesh communication. IC Role / Device Role / Timing Role: Low-noise 2.8 V supply for metrology ADC and isolated UART level-shifting circuitry. Use Value: 1.2 mA ground current at full load reduces standby power by 18 µW vs. legacy 3.3 V LDOs, improving battery backup duration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-2802E/MB | Same 2.8 V output, but 600 mV dropout at 250 mA; no reverse-battery protection. | Higher dropout limits use in low-input-voltage battery systems; lacks reverse protection for automotive. | Select when higher output current (250 mA) is required and reverse voltage exposure is absent. |
| TSS721AIDR | 2.85 V output, 400 mV dropout at 150 mA, integrated watchdog timer and reset generator. | Includes supervisory functions unsuitable for pure regulation-only roles; larger SOIC-8 footprint. | Choose when system-level reset and watchdog functionality are co-required with regulation. |
Compared with MCP1703-2802E/MB and TSS721AIDR, the MIC5203-2.8BM5TR delivers lower dropout and reverse-battery tolerance in a smaller SOT-23-5 package, making it optimal for space-constrained, battery- or automotive-fed 2.8 V rails where regulation purity and fault resilience are prioritized over supervisory features or higher current.
Availability
MIC5203-2.8BM5TR is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply with guaranteed long-term availability.
Supply support for MIC5203-2.8BM5TR 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 consumer applications.
The MIC5203 family is designed for high-reliability, low-noise LDO regulation in space- and power-constrained embedded systems where input voltage headroom is limited and fault resilience is critical.
FAQ
What is the maximum input voltage rating for the MIC5203-2.8BM5TR?
The MIC5203-2.8BM5TR supports an absolute maximum input voltage of 16 V. Exceeding this value risks permanent damage to the internal PNP pass transistor and bandgap reference circuitry. The device operates continuously from 2.5 V to 16 V input, with regulation maintained across this range as long as dropout conditions are met. Always observe derating guidelines in the official Microchip datasheet for sustained high-temperature operation.
Does the MIC5203-2.8BM5TR require an external output capacitor for stability?
Yes, the MIC5203-2.8BM5TR requires a minimum 1 µF ceramic output capacitor placed as close as possible to the OUT and GND pins. This capacitor ensures phase margin and prevents oscillation under all load and temperature conditions. Microchip specifies X5R or X7R dielectrics with ≤100 mΩ ESR; tantalum or aluminum electrolytic capacitors are not recommended due to ESR and aging effects that may compromise stability.
Can the MIC5203-2.8BM5TR be used in automotive applications with reverse battery connection?
Yes, the MIC5203-2.8BM5TR is rated for −16 V reverse input voltage and will not conduct or sustain damage under reverse-battery conditions. This feature eliminates the need for an external series diode in automotive body control modules and infotainment systems subject to jump-start errors. The device remains non-functional (output disabled) during reverse polarity but resumes normal operation immediately upon correct polarity restoration.
What is the quiescent current of the MIC5203-2.8BM5TR in shutdown mode?
In shutdown mode (EN pin pulled low), the MIC5203-2.8BM5TR draws only 1 µA typical quiescent current. This ultra-low shutdown current preserves battery energy in always-connected IoT endpoints and portable diagnostics tools. The EN pin threshold is 0.4 V (max) for disable and 1.4 V (min) for enable, supporting direct interfacing with 1.8 V and 3.3 V GPIOs without level-shifting.
Is thermal derating required for the MIC5203-2.8BM5TR in SOT-23-5 package at 150 mA load?
Yes, thermal derating is required. With 150 mA output at 2.8 V and 12 V input, power dissipation reaches ~1.38 W. In still-air conditions, the SOT-23-5 package (θJA = 220°C/W) would exceed 125°C junction temperature without PCB copper thermal relief. Microchip recommends ≥1 in² of 2-oz copper connected to the exposed pad and GND plane to achieve θJA ≤ 90°C/W and maintain safe operation at full load across the industrial temperature range.
MIC5203-2.8BM5TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 750 µA
- Current - Supply (Max):
- 3 mA
- PSRR:
- -
- 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:
- SOT-23-5
MIC5203-2.8BM5TR FAQ
1.How can I place an order for MIC5203-2.8BM5TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5203-2.8BM5TR 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 MIC5203-2.8BM5TR reliable?
The price and inventory of MIC5203-2.8BM5TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5203-2.8BM5TR is usually 5 days.
3.What payment methods are accepted for MIC5203-2.8BM5TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5203-2.8BM5TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5203-2.8BM5TR?
MIC5203-2.8BM5TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5203-2.8BM5TR 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 MIC5203-2.8BM5TR?
For technical support, including MIC5203-2.8BM5TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5203-2.8BM5TR requirements.
6.How does Aetrix verify that MIC5203-2.8BM5TR is sourced from the original manufacturer or authorized distributors?
All MIC5203-2.8BM5TR 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 MIC5203-2.8BM5TR meets industry standards.
7.What is the process for return or replacement of MIC5203-2.8BM5TR?
All MIC5203-2.8BM5TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5203-2.8BM5TR, 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 MIC5203-2.8BM5TR part is unused and in its original packaging.
Return procedure for MIC5203-2.8BM5TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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