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Microchip Technology MIC5514-1.2YMT-TR
- Part No.:
- MIC5514-1.2YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
MIC5514-1.2YMT-TR.pdf
- Description:
- IC REG LINEAR 1.2V 300MA 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,236
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Product details
Overview
MIC5514-1.2YMT-TR from Micrel is a fixed 1.2V, 300mA low-dropout linear regulator in a 6-pin 1.6mm × 1.6mm Thin DFN package, featuring ±1% initial output accuracy, 160mV dropout at full load, and an internal 4MΩ enable pull-down resistor. It delivers stable power to core logic rails in portable electronics where floating enable signals occur during processor boot-up.
For engineers reviewing the MIC5514-1.2YMT-TR datasheet, MIC5514-1.2YMT-TR pinout, MIC5514-1.2YMT-TR application, or MIC5514-1.2YMT-TR equivalent, key selection criteria include guaranteed 300mA output current with auto-discharge, zero-off-mode shutdown current (<1µA), and compatibility with 1µF ceramic output capacitors in space-constrained designs.
Technical Context
The MIC5514-1.2YMT-TR integrates a CMOS-based LDO control architecture with active-high enable logic and internal discharge FET (25Ω) activated upon disable. Its thermal shutdown and current-limit protection operate across –40°C to +125°C junction temperature range.
It accepts input voltages from 2.5V to 5.5V and maintains regulation with 1µF ceramic output capacitance. Ground current remains stable at 38µA typical under no-load and rises only to 65µA at 300mA, enabling high efficiency in battery-powered operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% initial accuracy - ensures precise core voltage for low-power microcontrollers and RF ICs. |
| Max Output Current | 300mA guaranteed - supports moderate-current digital loads without external pass devices. |
| Dropout Voltage | 160mV at 300mA - enables operation from 1.36V input, critical for single-cell Li-ion or Li-poly systems. |
| Ground Current | 38µA typical at light load; <1µA in shutdown - minimizes quiescent drain in always-on subsystems. |
| Enable Pull-Down | 4MΩ internal resistor on EN pin - prevents unintended turn-on when host MCU GPIO is unconfigured at boot. |
| Output Discharge | 25Ω internal NFET - actively discharges output capacitor within microseconds after disable, improving system safety and sequencing. |
| Stability | Stable with ≥1µF ceramic output capacitor - eliminates need for large tantalum or electrolytic caps, reducing board area and cost. |
Pinout & Package
Package: 6-pin 1.6mm × 1.6mm Thin DFN (MT) with exposed thermal pad (ePad), RoHS-compliant, NiPdAu lead finish, halogen-free mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Active-high enable input | Logic high ≥1.2V enables regulator; floating state disables output due to internal 4MΩ pull-down - eliminates external biasing in boot-critical applications. |
| 2, 5 - NC | No-connect terminals | Not internally bonded - must remain unconnected per design; no routing or copper fill required. |
| 3 - VIN | Input supply connection | Accepts 2.5V–5.5V; requires 1µF ceramic decoupling to GND close to pin for stability and noise rejection. |
| 4 - VOUT | Regulated output node | Delivers fixed 1.2V; auto-discharge path engages when EN = low - prevents hold-up voltage in power-down sequences. |
| 6 - GND | Power ground reference | Primary return path for load and quiescent current; must be connected to PCB ground plane with low-inductance path. |
| ePad | Exposed thermal pad | Internally tied to GND; soldering to solid ground plane reduces θJA by >30% and improves thermal margin at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge circuit | 25Ω internal NFET actively pulls VOUT to GND when disabled - eliminates external discharge resistors and simplifies power sequencing. |
| Enable pull-down resistor | 4MΩ internal pull-down on EN pin - guarantees safe default-OFF behavior during MCU reset or undefined I/O states. |
| Ultra-low quiescent current | 38µA typical at 100µA load - extends battery life in standby modes without sacrificing startup speed. |
| Thermal and current protection | Integrated thermal shutdown and foldback current limiting - prevents damage during overload or ambient temperature excursions. |
| Small-footprint packaging | 1.6mm × 1.6mm Thin DFN with ePad - fits in <2.6mm² board area, ideal for compact wearables and sensor nodes. |
Applications
| Smartphone Baseband Core Supply | Wearable Sensor Node Power Rail |
|---|---|
|
Use Scenario: Powers ARM Cortex-M0+ MCU and BLE radio core logic during active and sleep cycles in ultra-thin smartphones. IC Role / Device Role / Timing Role: Primary 1.2V core LDO delivering regulated voltage with fast transient response and automatic discharge during suspend-to-RAM. Use Value: Enables sub-100µA system sleep current via zero-off-mode shutdown and eliminates need for external discharge circuitry. |
Use Scenario: Supplies 1.2V to MEMS accelerometer and ultra-low-power ADC in coin-cell–powered fitness trackers. IC Role / Device Role / Timing Role: Always-on LDO maintaining rail integrity during intermittent wake-ups; internal pull-down prevents spurious enable during cold start. Use Value: Delivers 300mA peak current for sensor burst reads while sustaining <40µA quiescent draw - extends battery life beyond 6 months. |
| Medical Pulse Oximeter Front-End | Industrial IoT Edge Controller Logic Rail |
|
Use Scenario: Provides clean 1.2V supply to analog front-end and signal processing ASIC in Class II medical wearable devices. IC Role / Device Role / Timing Role: Low-noise (175µVRMS) LDO with tight ±1% accuracy ensuring consistent ADC reference and optical measurement fidelity. Use Value: Stable regulation over –40°C to +85°C operating range meets IEC 60601-1 environmental requirements without derating. |
Use Scenario: Powers FPGA configuration logic and real-time Ethernet PHY interface in DIN-rail mounted edge gateways. IC Role / Device Role / Timing Role: Robust 300mA LDO with thermal shutdown and 125°C max junction rating supporting extended industrial temperature operation. Use Value: Maintains regulation under 5.5V input transients and sustains performance with 1µF ceramic output cap - reduces BOM count and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-1202E/MB | 1.2V fixed, 250mA, 600mV dropout at full load, no internal EN pull-down, SOT-23-5 package | Larger dropout limits use below 1.8V input; lacks auto-discharge and floating-safe enable | Choose when board space allows SOT-23 and enable signal is actively driven. |
| Torex XC6219B122MR-G | 1.2V fixed, 300mA, 150mV dropout, 1µA shutdown current, no EN pull-down, SOT-25 package | Lower dropout but requires external pull-down resistor on EN; no integrated discharge FET | Prefer when ultra-low shutdown current is critical and external biasing is acceptable. |
Compared with MIC5514-1.2YMT-TR, MCP1703T-1202E/MB offers lower cost but sacrifices dropout performance and floating-enable safety, while XC6219B122MR-G matches current capability and dropout but adds design overhead for EN biasing and discharge management.
Availability
MIC5514-1.2YMT-TR is available at Aetrix Electronics and suitable for smartphone baseband supplies, wearable sensor nodes, medical pulse oximeters, and industrial IoT edge controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MIC5514-1.2YMT-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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; it specialized in power management, timing, and interface ICs for portable and industrial applications.
The MIC5512/14 family was designed specifically for space-constrained, battery-powered portable electronics requiring high accuracy, ultra-low quiescent current, and robust enable behavior during uncontrolled boot sequences.
FAQ
What is the maximum input voltage rating for the MIC5514-1.2YMT-TR?
The MIC5514-1.2YMT-TR has an absolute maximum input voltage of 6V, but its recommended operating range is 2.5V to 5.5V. Exceeding 5.5V may trigger internal protection or cause permanent damage. The device is optimized for single-cell Li-ion (up to 4.2V) and 3.3V/5V system rails, and the 160mV dropout ensures usable headroom down to 1.36V input for 1.2V output.
Does the MIC5514-1.2YMT-TR require an external pull-down resistor on the EN pin?
No - the MIC5514-1.2YMT-TR includes an internal 4MΩ pull-down resistor on the EN pin, which ensures the regulator remains disabled when the enable signal is left floating. This feature is specific to the MIC5514 variant and eliminates the need for external biasing, unlike the MIC5512 series. The EN pin is active-high and responds to logic thresholds of 0.2V (low) and 1.2V (high).
Can the MIC5514-1.2YMT-TR operate stably with less than 1µF output capacitance?
No - the MIC5514-1.2YMT-TR requires a minimum 1µF ceramic output capacitor for guaranteed stability across temperature and load conditions. Using smaller values risks oscillation or poor transient response. X5R or X7R dielectrics are recommended; Y5V or Z5U types are not advised due to excessive capacitance loss over temperature.
What is the purpose of the exposed thermal pad (ePad) on the MIC5514-1.2YMT-TR?
The ePad on the MIC5514-1.2YMT-TR is internally connected to GND and serves as the primary thermal conduction path from the die to the PCB. Soldering it to a solid ground plane reduces junction-to-ambient thermal resistance (θJA) from 92.4°C/W to ~65°C/W, enabling reliable 300mA operation at elevated ambient temperatures. Omitting ePad connection degrades thermal performance and may trigger premature thermal shutdown.
How does the auto-discharge function work in the MIC5514-1.2YMT-TR?
When the EN pin is driven low, the MIC5514-1.2YMT-TR activates an internal 25Ω NFET between VOUT and GND, rapidly discharging external output capacitance. This occurs independently of input voltage and ensures VOUT falls to near-zero within microseconds - critical for safe power sequencing, preventing back-powering of upstream circuits, and meeting IEC 62368-1 discharge requirements. The discharge path is disabled when EN is high.
MIC5514-1.2YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UFDFN Exposed Pad
- 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.38V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 55 µA
- Current - Supply (Max):
- 65 µA
- PSRR:
- 65dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN (1.6x1.6)
MIC5514-1.2YMT-TR FAQ
1.How can I place an order for MIC5514-1.2YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5514-1.2YMT-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 MIC5514-1.2YMT-TR reliable?
The price and inventory of MIC5514-1.2YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5514-1.2YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5514-1.2YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5514-1.2YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5514-1.2YMT-TR?
MIC5514-1.2YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5514-1.2YMT-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 MIC5514-1.2YMT-TR?
For technical support, including MIC5514-1.2YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5514-1.2YMT-TR requirements.
6.How does Aetrix verify that MIC5514-1.2YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5514-1.2YMT-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 MIC5514-1.2YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5514-1.2YMT-TR?
All MIC5514-1.2YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5514-1.2YMT-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 MIC5514-1.2YMT-TR part is unused and in its original packaging.
Return procedure for MIC5514-1.2YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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