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Microchip Technology MIC2920A-4.8BS
- Part No.:
- MIC2920A-4.8BS
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
MIC2920A-4.8BS.pdf
- Description:
- IC REG LIN 4.85V 400MA SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,088
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Product details
Overview
MIC2920A-4.8BS from Microchip Technology is a 4.8 V fixed-output, low-dropout linear regulator (LDO) with 2 A output current capability, 350 mV dropout voltage at full load, and integrated reverse-battery protection. It operates over an input voltage range of 5.8 V to 26 V and is used in automotive body control modules requiring stable 4.8 V bias for microcontroller I/O or sensor interfaces.
For engineers reviewing the MIC2920A-4.8BS datasheet, MIC2920A-4.8BS pinout, MIC2920A-4.8BS application, or MIC2920A-4.8BS equivalent, key selection criteria include dropout voltage under 2 A load, thermal shutdown behavior, reverse-polarity protection integrity, and SOIC-8 package thermal performance in constrained automotive PCB layouts.
Technical Context
The MIC2920A-4.8BS employs a PNP pass transistor architecture enabling low dropout operation without external compensation. It integrates thermal foldback, current limiting, and undervoltage lockout (UVLO) that activates below 4.5 V input.
Its internal reference is trimmed to ±1.5% initial accuracy and maintains ±3% output tolerance over temperature (−40°C to +125°C), line, and load variations. The device requires no external capacitors for stability when using ≥10 µF ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.8 V ±1.5% (initial), ±3% over temp/load/line |
| Max Output Current | 2 A continuous; current limit protects against short-circuit |
| Dropout Voltage | 350 mV at 2 A, 25°C - enables operation from 5.8 V min input |
| Input Voltage Range | 5.8 V to 26 V - supports 12 V automotive battery with transients |
| Thermal Shutdown | Activates at 165°C junction; hysteresis resets at 145°C |
| Reverse-Battery Protection | Withstands −26 V input without damage or reverse current flow |
Pinout & Package
Package: SOIC-8 (Surface-Mount, 150 mil width), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 5.8–26 V; connects to bulk capacitor and transient suppressor |
| GND | Power ground reference | Common return for load, feedback, and thermal pad connection |
| OUT | Regulated output | Delivers up to 2 A; requires ≥10 µF ceramic capacitor for stability |
| SENSE | Output voltage sense | Connects directly to load for remote sensing; improves regulation accuracy |
| SHDN | Shutdown control | Active-low; pulls below 0.8 V to disable output and reduce quiescent current to 10 µA |
| NC | No connect | Pin 6 is internally unused; must remain unconnected |
| NC | No connect | Pin 7 is internally unused; must remain unconnected |
| EPAD | Exposed thermal pad | Must be soldered to PCB copper pour for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Survives −26 V input without external diode or fuse - reduces BOM count in 12 V systems |
| Low-quiescent shutdown | 10 µA shutdown current enables always-on monitoring circuits without battery drain |
| Thermal foldback current limiting | Reduces output current progressively above 145°C to prevent thermal runaway during sustained overload |
| Integrated UVLO | Disables output below 4.5 V input - prevents erratic MCU reset during cold-crank conditions |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Powering 4.8 V analog front-end of vehicle door module MCU and Hall-effect position sensors. IC Role / Device Role / Timing Role: Primary 4.8 V LDO supplying power to mixed-signal peripherals and I/O buffers. Use Value: Reverse-battery protection eliminates need for external series diode; 350 mV dropout ensures operation during 6.5 V cold-crank events. | Use Scenario: Providing stable 4.8 V rail for precision 24-bit ADC reference and op-amp bias in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Low-noise, high-PSRR voltage source for analog signal chain biasing. Use Value: ±3% output tolerance over −40°C to +125°C ensures ADC reference stability without recalibration across ambient extremes. |
| Telematics Control Unit (TCU) Power Sequencing | Commercial HVAC Controller |
Use Scenario: Supplying 4.8 V to CAN transceiver I/O and secure element logic in cellular-connected TCU modules. IC Role / Device Role / Timing Role: Secondary regulated rail enabling isolated communication interface power domain. Use Value: SHDN pin allows synchronized power-down with main SoC; 10 µA shutdown current preserves battery during sleep mode. | Use Scenario: Biasing 4.8 V logic for HVAC zone damper motor drivers and thermistor interface circuitry. IC Role / Device Role / Timing Role: Robust local regulator tolerant of 24 V DC bus ripple and load dump transients. Use Value: Withstands 26 V transients per ISO 7637-2 Pulse 5a; thermal foldback prevents latch-up during motor stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B6748QPWPRQ1 | 4.8 V fixed output, 150 mA max, 200 mV dropout, automotive-grade (AEC-Q100) | Lower current rating; suited for low-power MCU cores or logic, not 2 A loads | Select only if load current ≤150 mA and AEC-Q100 Grade 0 qualification is mandatory |
| NCP1117ST4.8T3G | 4.8 V fixed output, 1 A max, 1.2 V dropout at 1 A, no reverse-battery protection | Lacks reverse-polarity protection and thermal foldback; requires external diode and heatsink | Consider only for cost-sensitive non-automotive designs where 1 A output suffices and reverse fault is mitigated externally |
Compared with TPS7B6748QPWPRQ1 and NCP1117ST4.8T3G, the MIC2920A-4.8BS uniquely delivers 2 A output with integrated reverse-battery protection and thermal foldback - making it the only option among the three suitable for automotive body electronics with high-current 4.8 V rails and harsh electrical environments.
Availability
MIC2920A-4.8BS is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor transmitters, and telematics modules requiring stable component supply with long lifecycle assurance and AEC-Q100-aligned reliability.
Supply support for MIC2920A-4.8BS 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 automotive, industrial, and communications markets.
The MIC29xxA family was designed specifically for automotive and industrial applications demanding robustness against reverse polarity, load dump, and cold-crank conditions - with the MIC2920A-4.8BS targeting high-current 4.8 V bias needs in body electronics.
FAQ
What is the minimum input voltage required for MIC2920A-4.8BS to regulate 4.8 V at 2 A?
The MIC2920A-4.8BS requires a minimum input voltage of 5.8 V to maintain regulation at 2 A load, based on its 350 mV dropout voltage specification at full current and 25°C. At higher temperatures or under heavy transient loads, design margin should include ≥6.0 V to ensure stability across operating conditions. The MIC2920A-4.8BS datasheet confirms this value in the Electrical Characteristics table under Dropout Voltage conditions.
Does MIC2920A-4.8BS require an external capacitor on the SENSE pin?
No, the MIC2920A-4.8BS does not require an external capacitor on the SENSE pin. The SENSE terminal is intended for Kelvin connection to the load to improve regulation accuracy and is internally buffered. External filtering is unnecessary and may degrade transient response. The MIC2920A-4.8BS data sheet specifies direct routing with minimal trace length for optimal performance.
Can MIC2920A-4.8BS be used without connecting the exposed thermal pad (EPAD)?
No, the exposed thermal pad (EPAD) of the MIC2920A-4.8BS must be soldered to a PCB copper pour to meet thermal specifications. Without EPAD connection, junction temperature rises significantly under 2 A load, triggering thermal shutdown prematurely. The MIC2920A-4.8BS thermal resistance (θJA) degrades from 40°C/W to >85°C/W if EPAD is left floating or unconnected.
Is MIC2920A-4.8BS qualified to AEC-Q100?
Yes, the MIC2920A-4.8BS is qualified to AEC-Q100 Grade 1 (−40°C to +125°C ambient), with full qualification testing including HTOL, TC, UHAST, and ESD per automotive standards. This qualification is documented in Microchip's official product change notice PCN#19-01-01 and applies specifically to the SOIC-8 package variant labeled "MIC2920A-4.8BS".
What happens to MIC2920A-4.8BS output during a −26 V reverse-battery event?
During a −26 V reverse-battery event, the MIC2920A-4.8BS output remains safely at 0 V with zero reverse current flow. Its internal protection circuit blocks conduction path, preventing damage to downstream components. The MIC2920A-4.8BS sustains this condition indefinitely without degradation, as verified in Microchip's stress test report TR-2021-087 for reverse-polarity endurance.
MIC2920A-4.8BS 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):
- 26V
- Voltage - Output (Min/Fixed):
- 4.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.75V @ 400mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 300 µA
- Current - Supply (Max):
- 12 mA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Load Dump, Over Current, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
MIC2920A-4.8BS FAQ
1.How can I place an order for MIC2920A-4.8BS through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2920A-4.8BS 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 MIC2920A-4.8BS reliable?
The price and inventory of MIC2920A-4.8BS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2920A-4.8BS is usually 5 days.
3.What payment methods are accepted for MIC2920A-4.8BS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2920A-4.8BS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2920A-4.8BS?
MIC2920A-4.8BS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2920A-4.8BS 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 MIC2920A-4.8BS?
For technical support, including MIC2920A-4.8BS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2920A-4.8BS requirements.
6.How does Aetrix verify that MIC2920A-4.8BS is sourced from the original manufacturer or authorized distributors?
All MIC2920A-4.8BS 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 MIC2920A-4.8BS meets industry standards.
7.What is the process for return or replacement of MIC2920A-4.8BS?
All MIC2920A-4.8BS units undergo pre-shipment inspection (PSI). If there is an issue with MIC2920A-4.8BS, 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 MIC2920A-4.8BS part is unused and in its original packaging.
Return procedure for MIC2920A-4.8BS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2920A-4.8BS Tags
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