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Microchip Technology MIC5305-4.6YMT-TR
- Part No.:
- MIC5305-4.6YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-UDFN Exposed Pad, 6-TMLF®
- Datasheet:
-
MIC5305-4.6YMT-TR.pdf
- Description:
- IC REG LINEAR 4.6V 150MA 6TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,168
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Product details
Overview
MIC5305-4.6YMT-TR from Micrel is a fixed-output 4.6V, 150mA ultra-low dropout LDO regulator in a 6-pin 2mm × 2mm Thin MLF® package, featuring 60mV dropout at full load, 20µVrms output noise, and 85dB PSRR at 1kHz - optimized for low-noise power delivery in portable audio codec and fiber optic module applications.
For engineers reviewing the MIC5305-4.6YMT-TR datasheet, MIC5305-4.6YMT-TR pinout, MIC5305-4.6YMT-TR application, or MIC5305-4.6YMT-TR equivalent, key selection criteria include guaranteed 150mA output with ±1.0% initial accuracy, logic-compatible enable input, ceramic-capacitor stability, and thermal shutdown protection in an ultra-thin leadless package.
Technical Context
The MIC5305-4.6YMT-TR implements a CMOS-based LDO architecture with a precision 1.25V internal reference, quick-start bypass circuitry, and integrated current limit and thermal shutdown. Its error amplifier drives a low-RDS(on) pass transistor to achieve 60mV dropout at 150mA while maintaining stability with only 1µF ceramic output capacitance.
Operation is enabled via a CMOS-compatible active-high EN pin (VIL ≤ 0.2V, VIH ≥ 1.0V), and noise performance is enhanced by a dedicated BYP pin supporting 0.1µF external capacitor to reduce reference noise - delivering 20µVrms integrated output noise (10Hz–100kHz) and up to 85dB ripple rejection at 1kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.6V ±1.0% initial accuracy ensures stable biasing for 4.5–4.7V-tolerant analog circuits. |
| Max Output Current | 150mA guaranteed minimum supports single-rail power for low-power RF ICs and audio DACs. |
| Dropout Voltage | 60mV @ 150mA enables operation from 4.66V input - critical for battery-powered systems near end-of-discharge. |
| Ground Current | 90µA typical at light load minimizes standby power in always-on keep-alive circuits. |
| PSRR | 85dB @ 1kHz suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 20µVrms (10Hz–100kHz) meets low-noise requirements for high-fidelity audio codec supplies. |
| Enable Threshold | VIH = 1.0V allows direct interfacing with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
The MIC5305-4.6YMT-TR uses a 6-pin 2mm × 2mm Thin MLF® (MT) package with exposed heatsink pad (EPAD) internally connected to GND. Pin 1 is marked with "▲" symbol on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable Input | Active-high CMOS control: ≥1.0V enables regulation; ≤0.2V forces zero-off-mode current (<0.5µA). |
| 2 (GND) | Ground Reference | Common return path for load, input, and internal circuitry; EPAD must be soldered to PCB ground plane. |
| 3 (VIN) | Input Supply | Accepts 2.25V–5.5V; requires 1µF ceramic bypass to GND for stability and transient response. |
| 4 (BYP) | Reference Bypass | Connects to 0.1µF capacitor to GND to reduce reference noise and improve PSRR and output noise. |
| 5 (VOUT) | Regulated Output | Delivers stable 4.6V ±1.0%; requires ≥1µF ceramic output capacitor for loop stability. |
| 6 (NC) | No Connection | Not internally bonded; must remain unconnected - no routing or grounding allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 60mV @ 150mA enables >98% voltage efficiency from 4.66V input - extends battery runtime in 5V-rail portable devices. |
| Ceramic-capacitor stability | Stable with ≥1µF X7R/X5R ceramic output cap - eliminates need for costly tantalum or electrolytic capacitors and saves board space. |
| Low-noise regulation | 20µVrms output noise + 85dB PSRR at 1kHz supports sensitive analog loads like audio codecs and laser diode drivers. |
| Zero-off-mode shutdown | EN pin disables regulator to <0.5µA quiescent current - essential for long-term backup power in SRAM or real-time clock circuits. |
| 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: Powering RF front-end ICs and baseband processors requiring clean, stable 4.6V supply under dynamic load conditions. IC Role / Device Role / Timing Role: Primary low-noise LDO supplying analog sections of cellular transceivers and PMIC subsystems. Use Value: 60mV dropout preserves headroom across Li-ion battery discharge curve (4.2V → 3.4V), while 20µVrms noise prevents EVM degradation. | Use Scenario: Providing bias voltage to laser diode drivers and post-amplifiers in SFP+ and XFP optical modules. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO delivering regulated 4.6V to high-speed analog signal chains. Use Value: 85dB PSRR at 1kHz rejects switching noise from adjacent DC/DC converters, ensuring BER compliance in 10Gbps links. |
| Portable Audio Codec Supply | Notebook PC Subsystem Rail |
Use Scenario: Powering stereo audio DACs and headphone amplifiers in tablets and handheld media players. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for analog audio signal path, isolated from noisy digital domains. Use Value: 20µVrms integrated noise meets THD+N < −95dB requirements for high-resolution audio playback. | Use Scenario: Supplying auxiliary rails for embedded controllers, touchpad ICs, or USB-C PD interface logic in ultrabooks. IC Role / Device Role / Timing Role: Secondary LDO generating precise 4.6V from main 5V rail for low-power subsystems. Use Value: ±1.0% initial accuracy and <0.5% load regulation ensure consistent timing and logic margin across temperature and load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-4602E/TT | 250mA rated, 1.6µA quiescent current, SOT-23-5 package, 1.6V–6.0V input range. | Lower IQ suits always-on sensor nodes; higher max current supports wider load range but larger dropout (178mV @ 250mA). | Select when ultra-low IQ dominates over noise performance and board space is less constrained. |
| Torex XC6206P462MR-G | 150mA rated, 3µA IQ, SOT-23-5, 1.8V–6.0V input, 400mV dropout @ 150mA. | Higher dropout limits use with low-headroom inputs; lower noise (15µVrms) but no BYP pin for PSRR tuning. | Choose for lowest possible standby power where input voltage margin exceeds 500mV. |
Compared with MCP1700T-4602E/TT and XC6206P462MR-G, the MIC5305-4.6YMT-TR delivers superior PSRR (85dB vs. ≤65dB) and lower dropout (60mV vs. ≥178mV), making it optimal for noise-sensitive, battery-constrained designs where 2mm × 2mm footprint and BYP-adjustable noise suppression are required.
Availability
MIC5305-4.6YMT-TR is available at Aetrix Electronics and suitable for cellular phone power management, fiber optic transceiver biasing, and portable audio codec supply applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for MIC5305-4.6YMT-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 high-performance analog and mixed-signal ICs, acquired by Microchip Technology in 2015.
The MIC5305 product line was designed for ultra-compact, low-noise power regulation in space-constrained portable electronics - emphasizing ceramic-capacitor compatibility, sub-100µA quiescent current, and high PSRR in sub-2mm² packages.
FAQ
What is the maximum input voltage rating for the MIC5305-4.6YMT-TR?
The MIC5305-4.6YMT-TR has an absolute maximum input voltage (VIN) rating of 6V. Its recommended operating input range is 2.25V to 5.5V. Exceeding 6V may cause permanent damage. For reliable operation with a 4.6V output, VIN must remain ≥4.66V to maintain regulation at 150mA load due to its 60mV dropout specification.
Does the MIC5305-4.6YMT-TR require an external bypass capacitor on the BYP pin?
The MIC5305-4.6YMT-TR does not require an external bypass capacitor on the BYP pin to function, but adding a 0.1µF ceramic capacitor from BYP to GND reduces output noise to 20µVrms and improves PSRR to 85dB at 1kHz. Omitting it degrades noise and ripple rejection performance but maintains basic regulation.
Can the MIC5305-4.6YMT-TR operate without any load connected to VOUT?
Yes, the MIC5305-4.6YMT-TR remains stable and in regulation with no load - a feature confirmed in the datasheet's Application Information section. This makes it suitable for CMOS RAM keep-alive circuits and other zero-load standby applications where many LDOs would oscillate or drop out.
What is the thermal resistance (θJA) of the MIC5305-4.6YMT-TR package?
The MIC5305-4.6YMT-TR uses the 6-pin 2mm × 2mm Thin MLF® (MT) package, which has a junction-to-ambient thermal resistance (θJA) of 93°C/W under standard PCB mounting conditions with recommended minimum copper footprint. This value assumes proper soldering of the exposed EPAD to a grounded thermal pad.
Is the MIC5305-4.6YMT-TR pin-compatible with other MIC5305 variants in the same package?
Yes, all MIC5305 variants in the 6-pin Thin MLF® (MT) package - including MIC5305-2.8YMT and MIC5305-4.6YMT-TR - share identical pinout, footprint, and thermal characteristics. Only the output voltage and marking differ; no PCB redesign is needed when substituting between fixed-voltage MT variants.
MIC5305-4.6YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad, 6-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):
- 4.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.85V @ 150mA
- 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-TMLF® (2x2)
MIC5305-4.6YMT-TR FAQ
1.How can I place an order for MIC5305-4.6YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-4.6YMT-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 MIC5305-4.6YMT-TR reliable?
The price and inventory of MIC5305-4.6YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-4.6YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-4.6YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-4.6YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-4.6YMT-TR?
MIC5305-4.6YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-4.6YMT-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 MIC5305-4.6YMT-TR?
For technical support, including MIC5305-4.6YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-4.6YMT-TR requirements.
6.How does Aetrix verify that MIC5305-4.6YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-4.6YMT-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 MIC5305-4.6YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-4.6YMT-TR?
All MIC5305-4.6YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-4.6YMT-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 MIC5305-4.6YMT-TR part is unused and in its original packaging.
Return procedure for MIC5305-4.6YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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