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Microchip Technology MIC5337-1.8YMT-TR
- Part No.:
- MIC5337-1.8YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 4-UFDFN Exposed Pad, 4-TMLF®
- Datasheet:
-
MIC5337-1.8YMT-TR.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 4TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,466
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Product details
Overview
MIC5337-1.8YMT from Micrel is a 300mA, 1.8V fixed-output low-dropout linear regulator with 24µA quiescent current, 180mV dropout at full load, and integrated active discharge, designed for space-constrained battery-powered systems such as GPS modules and portable media players.
For engineers reviewing the MIC5337-1.8YMT datasheet, MIC5337-1.8YMT pinout, MIC5337-1.8YMT application, or MIC5337-1.8YMT equivalent, key selection criteria include ultra-low IQ, auto-discharge behavior during shutdown, thermal performance in the 1.2mm × 1.6mm Thin MLF® package, and stability with 1µF ceramic output capacitors.
Technical Context
The MIC5337-1.8YMT employs a CMOS-based LDO architecture with internal reference and error amplifier, enabling fast transient response and high PSRR (65dB @ 1kHz). Its active discharge circuit integrates an NFET (280Ω typical) between VOUT and GND when EN is low, ensuring rapid capacitor discharge without external components.
It operates across 2.3V–5.5V input range and delivers ±2.0% output voltage accuracy over –40°C to +125°C. Thermal shutdown and current limiting protect against fault conditions, while ground pin current remains stable (24–35µA) across 100µA–300mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.0% - ensures stable core supply for low-voltage microcontrollers and memory interfaces. |
| Max Output Current | 300mA - supports moderate-power RF ICs or sensor subsystems without thermal derating in compact layouts. |
| Quiescent Current | 24µA typical - extends battery life in always-on monitoring circuits like wearable health sensors. |
| Dropout Voltage | 180mV @ 300mA - enables regulation from single-cell Li-ion (3.0V min) down to 1.8V output with margin. |
| Input Voltage Range | 2.3V to 5.5V - compatible with Li-ion, Li-poly, and regulated 3.3V/5V rails without external pre-regulation. |
| PSRR | 65dB @ 1kHz - suppresses switching noise from adjacent DC-DC converters in mixed-signal PCBs. |
| Output Capacitor | Stable with ≥1µF ceramic - eliminates need for large tantalum or electrolytic caps, reducing board area and cost. |
Pinout & Package
Package: 4-pin 1.2mm × 1.6mm Thin MLF® (MT) with exposed EPAD internally connected to GND - provides low thermal resistance (θJA = 173°C/W) and mechanical robustness in ultra-thin portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Primary power input; must be bypassed with ≥1µF ceramic cap to GND for stability and noise rejection. |
| 2 - GND | Ground Reference | System ground return path; connects internally to EPAD for enhanced thermal dissipation. |
| 3 - EN | Enable Input (Active High) | TTL-compatible logic control; drives regulator ON/OFF; must not float - tie to VEN ≥1.2V or GND ≤0.2V. |
| 4 - VOUT | Regulated Output | 1.8V output node; internally connected to auto-discharge NFET when EN = low (280Ω typical discharge path). |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge on disable | Integrated 280Ω NFET discharges output capacitor rapidly - eliminates external discharge resistor and saves BOM count. |
| Ultra-low IQ operation | 24µA ground current at light load - minimizes standby power loss in battery-backed real-time clocks and sensors. |
| Small-footprint stability | Guaranteed stability with 1µF X5R/X7R ceramic output capacitor - avoids ESR sensitivity issues of larger electrolytics. |
| Robust protection suite | Thermal shutdown + foldback current limit - prevents damage during output short or ambient temperature rise. |
| Tiny Thin MLF® package | 1.2mm × 1.6mm footprint with EPAD - enables placement in tight spaces behind displays or under connectors. |
Applications
| GPS Navigation Module | Digital Still Camera Core Supply |
|---|---|
Use Scenario: Powering baseband processor and GNSS RF front-end in handheld navigation units with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 1.8V LDO delivering clean, low-noise supply to digital core and analog RF sections. Use Value: 65dB PSRR suppresses DC-DC ripple; 180mV dropout preserves runtime as battery discharges below 3.0V. | Use Scenario: Supplying image signal processor (ISP) and CMOS sensor interface in compact digital cameras. IC Role / Device Role / Timing Role: Fixed 1.8V rail generator with fast turn-on (<500µs) for burst-mode imaging sequences. Use Value: 24µA IQ extends standby time between shots; auto-discharge prevents residual voltage from interfering with power sequencing. |
| Portable Media Player SoC Core | Industrial Handheld Scanner Logic Rail |
Use Scenario: Regulating 1.8V core voltage for ARM-based application processors in MP3/video players. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO decoupling processor core from noisy switching supplies. Use Value: Stable 1µF ceramic support simplifies layout; ±2.0% accuracy ensures reliable CPU operation across temperature. | Use Scenario: Providing 1.8V logic supply to barcode scanner ASIC and Bluetooth radio in ruggedized field devices. IC Role / Device Role / Timing Role: Enable-controlled power domain isolator with thermal resilience up to +125°C junction. Use Value: 173°C/W θJA enables 300mA delivery in sealed enclosures; shutdown IQ <1µA supports long-term battery backup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 250mA max output, 1.6µA IQ, SOT-23-3 package - lower current, much lower IQ, no auto-discharge. | Limited to sub-250mA loads; unsuitable where rapid VOUT discharge is required for sequencing. | Select when ultra-low standby power dominates over discharge control and output current. |
| Torex XC6219B182MR-G | 300mA output, 1.0µA IQ, 200mV dropout @ 300mA, SOT-25 - no auto-discharge, slightly higher dropout. | Requires external discharge circuitry; less suitable for strict power-down timing compliance. | Choose when minimal IQ is critical and board space allows adding discharge FET/resistor. |
Compared with MCP1700-1802E/TO and XC6219B182MR-G, the MIC5337-1.8YMT uniquely combines 300mA capability, 24µA IQ, and integrated auto-discharge in a 1.2mm × 1.6mm footprint - making it optimal for compact, battery-sensitive systems requiring controlled power-down behavior.
Availability
MIC5337-1.8YMT is available at Aetrix Electronics and suitable for GPS navigation devices, portable media players, digital still cameras, industrial handheld scanners, and other battery-powered electronics requiring stable component supply with guaranteed long-term availability.
Supply support for MIC5337-1.8YMT 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 analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5337 family was developed by Micrel to address ultra-low-power, space-constrained LDO needs in portable consumer electronics - emphasizing minimal IQ, small footprint, and integrated system-level features like auto-discharge.
FAQ
What is the output voltage tolerance of the MIC5337-1.8YMT over temperature and load?
The MIC5337-1.8YMT maintains output voltage within ±2.0% of nominal 1.8V across –40°C to +125°C junction temperature and 100µA to 300mA load current, as specified in the Electrical Characteristics table under "Output Voltage Accuracy." This tolerance includes line, load, and thermal regulation effects, ensuring reliable operation for precision logic rails.
Does the MIC5337-1.8YMT require an external discharge resistor?
No, the MIC5337-1.8YMT does not require an external discharge resistor. It integrates an internal NFET (280Ω typical) between VOUT and GND that activates automatically when the EN pin is driven low, providing active discharge of the output capacitor without additional components.
What is the minimum input voltage required for the MIC5337-1.8YMT to regulate at full 300mA load?
To sustain 300mA output at 1.8V with 180mV dropout, the MIC5337-1.8YMT requires VIN ≥ 1.98V. However, the absolute minimum specified input voltage is 2.3V per Absolute Maximum Ratings - ensuring safe operation, adequate headroom for transient response, and compliance with thermal limits under worst-case conditions.
Can the MIC5337-1.8YMT operate with a 0.47µF output capacitor?
No, the MIC5337-1.8YMT is not guaranteed stable with 0.47µF output capacitance. The datasheet specifies ≥1µF ceramic capacitor for stability. Using smaller values may cause oscillation or degraded transient response due to insufficient phase margin in the control loop.
Is the EPAD on the MIC5337-1.8YMT package electrically isolated or grounded?
The EPAD on the MIC5337-1.8YMT package is internally connected to GND. It must be soldered to a PCB ground plane to ensure proper thermal dissipation (θJA = 173°C/W) and electrical integrity - floating or unconnected EPAD degrades thermal performance and may compromise reliability.
MIC5337-1.8YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 4-UFDFN Exposed Pad, 4-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 35 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB ~ 50dB (1kHz ~ 20kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-TMLF® (1.2x1.6)
MIC5337-1.8YMT-TR FAQ
1.How can I place an order for MIC5337-1.8YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5337-1.8YMT-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 MIC5337-1.8YMT-TR reliable?
The price and inventory of MIC5337-1.8YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5337-1.8YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5337-1.8YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5337-1.8YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5337-1.8YMT-TR?
MIC5337-1.8YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5337-1.8YMT-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 MIC5337-1.8YMT-TR?
For technical support, including MIC5337-1.8YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5337-1.8YMT-TR requirements.
6.How does Aetrix verify that MIC5337-1.8YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5337-1.8YMT-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 MIC5337-1.8YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5337-1.8YMT-TR?
All MIC5337-1.8YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5337-1.8YMT-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 MIC5337-1.8YMT-TR part is unused and in its original packaging.
Return procedure for MIC5337-1.8YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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