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Microchip Technology MIC5203-4.7BM4 TR
- Part No.:
- MIC5203-4.7BM4 TR
- Manufacturer:
- Microchip Technology
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MIC5203-4.7BM4 TR.pdf
- Description:
- IC REG LINEAR 4.7V 80MA SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:4,997
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Product details
Overview
MIC5203-4.7BM4 TR from Micrel is a fixed-output 4.7V, 80mA low-dropout linear regulator in SOT-143 package, featuring 20mV dropout at light load, 300mV at full load, ±3% output voltage accuracy, and logic-compatible enable input. It delivers stable power to battery-powered portable electronics with ultra-low ground current (225µA at 20mA) and supports ceramic output capacitors as small as 0.47µF.
For engineers reviewing the MIC5203-4.7BM4 TR datasheet, MIC5203-4.7BM4 TR pinout, MIC5203-4.7BM4 TR application, or MIC5203-4.7BM4 TR equivalent, key selection criteria include dropout performance under 80mA load, enable-input compatibility with TTL/CMOS logic, reversed-battery protection, thermal shutdown behavior, and stability with low-ESR ceramic capacitors without requiring tantalum or electrolytic types.
Technical Context
The MIC5203-4.7BM4 TR uses a PNP pass transistor architecture optimized for µCap operation, enabling stable regulation with minimal external capacitance. Its enable input accepts voltages up to 20V independent of VIN and draws only 15µA typical current when active.
Dropout voltage remains tightly controlled across temperature (–40°C to +125°C) and load (100µA to 80mA), with ground current increasing only marginally in dropout-critical for extending battery runtime in handheld devices where supply voltage sags near regulation threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.7V ±3% initial accuracy ensures reliable biasing of 4.7V-tolerant logic or analog circuitry without trimming. |
| Max Output Current | Guaranteed 80mA continuous output supports microcontroller peripherals, sensors, or RF front-ends in space-constrained designs. |
| Dropout Voltage | 300mV at 80mA enables operation down to VIN = 5.0V, extending usable battery range in single-cell Li-ion or dual-cell alkaline systems. |
| Quiescent Current | 225µA at 20mA load and 0.01µA in shutdown minimize standby power loss-critical for always-on keep-alive functions. |
| Enable Threshold | VIL ≤ 0.6V (off), VIH ≥ 2.0V (on) ensures direct interfacing with 3.3V or 5V GPIO without level-shifting. |
| Stability Capacitor | Stable with 0.47µF ceramic capacitor eliminates need for larger, higher-ESR alternatives-reducing BOM cost and PCB area. |
| Protection Features | Includes current limiting (180–250mA), thermal shutdown, and reversed-input polarity protection-enabling robust deployment in unregulated battery environments. |
Pinout & Package
SOT-143 (M4) surface-mount package: 1.3mm × 2.9mm footprint, 0.95mm height, gull-wing leads, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for regulator feedback and internal circuitry; must be low-impedance connection to system ground plane. |
| 2 | EN | Logic-compatible enable input: high ≥2.0V enables regulation; low ≤0.6V disables output and reduces quiescent current to <10µA. |
| 3 | IN | Unregulated input supply (2.5V–16V); requires local 0.1µF bypass if >10" wire length or battery source. |
| 4 | OUT | Regulated 4.7V output; stable with ≥0.47µF ceramic capacitor; no minimum load required. |
Key Features
| Feature | Design Value |
|---|---|
| µCap ceramic stability | Operates stably with 0.47µF ceramic output capacitor-eliminates need for bulky tantalum or electrolytic types and reduces board area by >50%. |
| Ultra-low dropout | 20mV dropout at light loads preserves headroom for deep-discharge battery operation while maintaining regulation. |
| Reversed-battery protection | Withstands –20V input without damage-enables safe use in consumer devices where battery insertion errors may occur. |
| No-load regulation | Maintains regulation with zero output load-essential for CMOS RAM backup, real-time clocks, and other always-on low-power circuits. |
| Wide enable voltage range | EN pin tolerates up to 20V regardless of VIN-allows direct connection to separate control rail or higher-voltage supervisor outputs. |
Applications
| Cellular Handsets | Laptop Subsystems |
|---|---|
Use Scenario: Powering baseband processor I/O rails and SIM card interface in GSM/UMTS handsets with single Li-ion cell (2.8V–4.2V). IC Role / Device Role: Primary LDO delivering clean 4.7V to voltage-sensitive RF components and digital interfaces. Use Value: 300mV dropout allows regulation until battery reaches ~5.0V, maximizing usable capacity; 0.47µF ceramic capacitor fits tight RF layout constraints. | Use Scenario: Supplying 4.7V to USB PHY transceivers or display backlight drivers in notebook sub-boards. IC Role / Device Role: Post-regulator after buck converter, providing low-noise, tightly regulated auxiliary voltage. Use Value: ±3% accuracy ensures USB signaling integrity; enable input synchronizes power-up with system controller sequencing. |
| Barcode Scanners | SMPS Post-Regulator |
Use Scenario: Powering laser diode driver and image sensor in handheld industrial barcode scanners powered by AA/AAA batteries. IC Role / Device Role: Main system regulator enabling rapid on/off cycling via EN pin during scan bursts. Use Value: 0.01µA shutdown current extends shelf life; reversed-polarity protection prevents field failure from battery reversal. | Use Scenario: Tight-tolerance post-regulation stage following a wide-input DC-DC converter in telecom power modules. IC Role / Device Role: Precision LDO correcting residual ripple and load-induced droop from upstream switching stage. Use Value: 0.5% load regulation and 0.5% line regulation maintain output stability across varying loads and input conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-4702E/TT | 250mA output, 1.6µA quiescent current, SOT-23-3 (no enable), 600mV dropout at 250mA | Lacks enable input and reverse-polarity protection; suited for simpler always-on applications | Select when higher output current is needed and enable control is unnecessary |
| TPS76347QDBVRQ1 | 150mA output, 85µA quiescent current, SOT-23-5 (enable), –40°C to +125°C, 350mV dropout at 150mA | Higher dropout and lower accuracy (±2%) but AEC-Q100 qualified for automotive use | Select for automotive-grade reliability where extended temperature and qualification are mandatory |
Compared with MCP1700T-4702E/TT and TPS76347QDBVRQ1, the MIC5203-4.7BM4 TR offers superior dropout performance at 80mA, integrated reversed-battery protection, and guaranteed no-load stability-making it optimal for portable battery-powered systems requiring compact size, ultra-low shutdown current, and robust fault tolerance.
Availability
MIC5203-4.7BM4 TR is available at Aetrix Electronics and suitable for cellular telephones, barcode scanners, and SMPS post-regulator modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5203-4.7BM4 TR 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
Micrel Inc. was a U.S.-based semiconductor company specializing in power management, analog, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5203 product line was designed specifically for ultra-low-power, battery-operated portable electronics requiring miniature packaging, ceramic-capacitor compatibility, and robust protection features in harsh physical handling environments.
FAQ
What is the minimum input voltage required for MIC5203-4.7BM4 TR to maintain regulation?
The MIC5203-4.7BM4 TR requires VIN ≥ VOUT + dropout voltage. At 80mA load, dropout is 300mV, so minimum VIN is 5.0V. At lighter loads (e.g., 100µA), dropout drops to 20mV, allowing VIN as low as 4.72V while maintaining 4.7V output. Input voltage must remain within 2.5V–16V absolute rating.
Does MIC5203-4.7BM4 TR require an external pull-up resistor on the EN pin?
No, the MIC5203-4.7BM4 TR does not require an external pull-up on EN. When unused, the EN pin can be tied directly to IN for 3-terminal operation. If controlled externally, drive it with a logic signal-VIH ≥ 2.0V enables regulation; VIL ≤ 0.6V disables it. Leakage is <1µA in either state.
Can MIC5203-4.7BM4 TR operate without any load connected to the OUT pin?
Yes, the MIC5203-4.7BM4 TR remains stable and in regulation with zero load-unlike many LDOs that require minimum load current. This makes it ideal for CMOS RAM keep-alive, RTC backup, or other always-on low-power circuits where output may be disconnected or idle for extended periods.
What type of output capacitor is recommended for MIC5203-4.7BM4 TR?
The MIC5203-4.7BM4 TR is optimized for 0.47µF ceramic capacitors (X5R/X7R dielectric) with ESR <1Ω. Larger values improve transient response but are not required. Tantalum is acceptable but unnecessary; aluminum electrolytics are discouraged below –25°C due to freezing electrolyte. Avoid high-temperature-coefficient dielectrics like Y5V.
Is MIC5203-4.7BM4 TR protected against reverse input voltage?
Yes, the MIC5203-4.7BM4 TR includes integrated reversed-input polarity protection and is rated for –20V on the IN pin. This prevents damage during incorrect battery installation or accidental reverse connection in handheld and portable equipment-eliminating need for external series diodes or protection ICs.
MIC5203-4.7BM4 TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 4.7V
- 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-143
MIC5203-4.7BM4 TR FAQ
1.How can I place an order for MIC5203-4.7BM4 TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5203-4.7BM4 TR 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 MIC5203-4.7BM4 TR reliable?
The price and inventory of MIC5203-4.7BM4 TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5203-4.7BM4 TR is usually 5 days.
3.What payment methods are accepted for MIC5203-4.7BM4 TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5203-4.7BM4 TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5203-4.7BM4 TR?
MIC5203-4.7BM4 TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5203-4.7BM4 TR 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 MIC5203-4.7BM4 TR?
For technical support, including MIC5203-4.7BM4 TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5203-4.7BM4 TR requirements.
6.How does Aetrix verify that MIC5203-4.7BM4 TR is sourced from the original manufacturer or authorized distributors?
All MIC5203-4.7BM4 TR 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 MIC5203-4.7BM4 TR meets industry standards.
7.What is the process for return or replacement of MIC5203-4.7BM4 TR?
All MIC5203-4.7BM4 TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5203-4.7BM4 TR, 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 MIC5203-4.7BM4 TR part is unused and in its original packaging.
Return procedure for MIC5203-4.7BM4 TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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