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Microchip Technology MIC5305-1.8YML-TR
- Part No.:
- MIC5305-1.8YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5305-1.8YML-TR.pdf
- Description:
- IC REG LINEAR 1.8V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,248
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Product details
Overview
MIC5305-1.8YML-TR from Micrel is a fixed-output 1.8V, 150mA ultra-low-dropout linear regulator in a 6-pin 2mm × 2mm MLF® package, featuring 60mV dropout at full load, ±1.0% initial output accuracy, and 20µVrms output noise. It delivers stable power to noise-sensitive analog circuitry in space-constrained portable electronics with minimal external components.
For engineers reviewing the MIC5305-1.8YML-TR datasheet, MIC5305-1.8YML-TR pinout, MIC5305-1.8YML-TR application, or MIC5305-1.8YML-TR equivalent, key selection criteria include its 2.25–5.5V input range, logic-compatible enable pin, ceramic-capacitor stability, thermal shutdown protection, and Pb-free 2mm × 2mm MLF® footprint compatibility with high-density PCB layouts.
Technical Context
The MIC5305-1.8YML-TR integrates a CMOS-based LDO core with a precision bandgap reference, error amplifier, and quick-start bypass circuitry. Its architecture enables sub-100µA quiescent current across load and temperature while maintaining 85dB PSRR at 1kHz and fast 30µs turn-on time with 0.1µF bypass capacitance.
It employs internal current limiting (300–900mA) and thermal shutdown for fault protection, and its µCap design eliminates need for large electrolytic capacitors-stability is guaranteed with ≥1µF low-ESR ceramic output capacitance and optional 0.1µF bypass capacitor on the BYP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1.0% initial accuracy ensures reliable biasing of 1.8V I/O domains and low-voltage microcontrollers. |
| Max Output Current | 150mA guaranteed continuous output supports power delivery to multiple digital peripherals without derating. |
| Dropout Voltage | 60mV @ 150mA enables operation from 1.86V input-critical for single-cell Li-ion or Li-poly battery systems near end-of-discharge. |
| Ground Current | 90µA typical quiescent current minimizes standby power loss in always-on subsystems like real-time clocks or sensor wake-up circuits. |
| PSRR | 85dB @ 1kHz suppresses switching noise from adjacent DC/DC converters, preserving signal integrity in audio codec supplies. |
| Output Noise | 20µVrms (10Hz–100kHz) meets stringent low-noise requirements for ADC reference buffers and RF front-end bias rails. |
| Enable Threshold | Logic-compatible EN pin activates at ≥1.0V and shuts down at ≤0.2V-directly interfaceable with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (leadless, exposed thermal pad grounded internally). Compact footprint supports high-density layout in handheld and wearable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; must be pulled high or low-floating state causes indeterminate output. |
| 2 - GND | Ground reference | Primary return path for load and quiescent current; connects to exposed thermal pad for enhanced thermal performance. |
| 3 - VIN | Input supply | Accepts 2.25–5.5V; requires 1µF ceramic bypass to GND for stability and transient response. |
| 4 - VOUT | Regulated output | Delivers fixed 1.8V; stable with ≥1µF ceramic output capacitor-no ESR constraints. |
| 5 - NC | No connection | Not bonded; left unconnected-no routing or grounding required. |
| 6 - BYP | Reference bypass | Connects 0.1µF capacitor to GND to reduce output noise by >10dB and improve PSRR above 10kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 60mV @ 150mA enables regulation from inputs as low as 1.86V-extends battery runtime in portable systems. |
| µCap ceramic stability | Stable with ≥1µF X7R/X5R ceramic output capacitor-eliminates bulkier tantalum or aluminum electrolytics. |
| Zero-off-mode shutdown | EN pin disables regulator to <0.5µA total current-ideal for long-term storage or deep-sleep modes. |
| High PSRR + low noise | 85dB PSRR @ 1kHz and 20µVrms noise protect sensitive analog rails from digital switching interference. |
| Thermal & current protection | Integrated thermal shutdown and 300–900mA current limit prevent damage during overload or ambient temperature excursions. |
Applications
| Cellular Phone Power Rails | Fiber Optic Transceiver Bias |
|---|---|
Use Scenario: Supplying 1.8V core voltage to baseband processor I/O banks and memory interfaces in slim-profile smartphones. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering regulated 1.8V rail with fast transient response to dynamic CPU load changes. Use Value: Enables clean power delivery without external ferrite beads or LC filters-reducing BOM count and board area. | Use Scenario: Providing stable 1.8V bias to laser diode drivers and post-amplifiers in SFP+ optical modules. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling high-frequency signal paths from noisy system power rails. Use Value: 20µVrms noise and 85dB PSRR prevent jitter accumulation in high-speed serial links up to 10Gbps. |
| Notebook PC Audio Codec | Portable Medical Sensor Hub |
Use Scenario: Powering DAC/ADC sections and headphone amplifiers in ultrabook audio subsystems. IC Role / Device Role / Timing Role: Dedicated low-noise LDO isolating analog audio circuitry from digital domain noise. Use Value: Meets THD+N < -95dB requirements via 20µVrms noise floor and minimal load-dependent regulation drift. | Use Scenario: Regulating 1.8V for ultra-low-power biosignal acquisition ICs (ECG, SpO₂) in battery-powered wearables. IC Role / Device Role / Timing Role: Always-on power source with 90µA quiescent current and zero-off-mode shutdown during sleep cycles. Use Value: Extends single-charge battery life beyond 7 days while maintaining fast wake-up (<100µs) via EN-controlled activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/MB | 150mA, 600mV dropout @ 250mA, 1.8V fixed, SOT-23-3 package, no enable pin. | Lacks EN control and BYP pin-unsuitable for systems requiring active power sequencing or ultra-low-noise operation. | Select when board space is constrained and enable/shutdown functionality is not required. |
| Torex XC6206P182MR-G | 150mA, 160mV dropout @ 100mA, 1.8V fixed, SOT-25 package, 1µA quiescent current, no BYP pin. | Lower IQ but higher dropout and no bypass option-limits use in low-input-voltage or noise-critical designs. | Select for ultra-low-power standby applications where input headroom exceeds 200mV and noise is secondary. |
Compared with MCP1700T-1802E/MB and XC6206P182MR-G, the MIC5305-1.8YML-TR uniquely combines ultra-low dropout (60mV), integrated enable, and bypass-pin noise reduction-making it optimal for high-performance portable systems demanding both efficiency and signal integrity.
Availability
MIC5305-1.8YML-TR is available at Aetrix Electronics and suitable for cellular phone power management, fiber optic transceiver biasing, notebook audio codec supplies, portable medical sensor hubs, and other applications requiring stable component supply with tight voltage tolerance and low-noise performance.
Supply support for MIC5305-1.8YML-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 analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5305 family was designed specifically for ultra-compact, battery-powered portable electronics requiring high PSRR, low noise, and minimal external components-targeting cellular handsets, PDAs, and optical modules.
FAQ
What is the minimum input voltage required for MIC5305-1.8YML-TR to maintain regulation at 150mA load?
The MIC5305-1.8YML-TR requires a minimum input voltage of 1.86V to sustain 1.8V output at 150mA, based on its 60mV typical dropout voltage. At light loads, dropout decreases further-enabling operation from as low as 1.81V. Input must remain within the absolute maximum rating of 6V and operating range of 2.25–5.5V for guaranteed performance.
Does MIC5305-1.8YML-TR require an external bypass capacitor for basic operation?
No, the MIC5305-1.8YML-TR operates stably without the BYP capacitor. However, connecting a 0.1µF ceramic capacitor from BYP to GND reduces output noise from 20µVrms to <10µVrms and improves PSRR by 10–15dB above 10kHz-recommended for audio, RF, or precision analog applications.
Can MIC5305-1.8YML-TR be used with a 0.47µF output capacitor instead of the recommended 1µF?
No-MIC5305-1.8YML-TR requires ≥1µF ceramic output capacitance for guaranteed stability per the datasheet. Using 0.47µF risks high-frequency oscillation due to insufficient phase margin, especially with X7R/X5R dielectrics. Always adhere to the 1µF minimum for robust transient response and loop stability.
What is the thermal resistance (θJA) of MIC5305-1.8YML-TR in its standard MLF® package?
The MIC5305-1.8YML-TR has a junction-to-ambient thermal resistance (θJA) of 93°C/W when mounted on the recommended minimum copper footprint per the MLF® package data. This value assumes standard JEDEC test conditions; actual θJA improves significantly with increased PCB copper area or thermal vias to inner ground planes.
Is MIC5305-1.8YML-TR compatible with lead-free reflow soldering processes?
Yes, MIC5305-1.8YML-TR is Pb-free and rated for standard lead-free reflow profiles, including peak temperatures up to 260°C for 5 seconds. The "Y" in the part number denotes RoHS-compliant, halogen-free packaging-fully compliant with IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1).
MIC5305-1.8YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad, 6-MLF®
- 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):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- 85dB ~ 65dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x2)
MIC5305-1.8YML-TR FAQ
1.How can I place an order for MIC5305-1.8YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-1.8YML-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 MIC5305-1.8YML-TR reliable?
The price and inventory of MIC5305-1.8YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-1.8YML-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-1.8YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-1.8YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-1.8YML-TR?
MIC5305-1.8YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-1.8YML-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 MIC5305-1.8YML-TR?
For technical support, including MIC5305-1.8YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-1.8YML-TR requirements.
6.How does Aetrix verify that MIC5305-1.8YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-1.8YML-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 MIC5305-1.8YML-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-1.8YML-TR?
All MIC5305-1.8YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-1.8YML-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 MIC5305-1.8YML-TR part is unused and in its original packaging.
Return procedure for MIC5305-1.8YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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