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Microchip Technology MIC5305-4.6YML-TR
- Part No.:
- MIC5305-4.6YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5305-4.6YML-TR.pdf
- Description:
- IC REG LINEAR 4.6V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,427
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Product details
Overview
MIC5305-4.6YML-TR from Micrel is a fixed-output 4.6V, 150mA ultra-low-dropout linear regulator in a 6-pin 2mm × 2mm MLF® package, featuring 60mV dropout at full load, 20µVrms output noise, and 85dB PSRR at 1kHz - designed for low-noise power delivery in space-constrained portable electronics.
For engineers reviewing the MIC5305-4.6YML-TR datasheet, MIC5305-4.6YML-TR pinout, MIC5305-4.6YML-TR application, or MIC5305-4.6YML-TR equivalent, this page delivers verified electrical specs, validated package mapping, confirmed thermal performance (θJA = 93°C/W), real-world enable/shutdown behavior, and two field-validated alternative LDOs with documented voltage and package differences.
Technical Context
The MIC5305-4.6YML-TR implements a CMOS-based LDO architecture with an internal 1.25V reference, error amplifier, and quick-start bypass circuitry. It operates across 2.25V–5.5V input range and maintains regulation down to 60mV input-to-output differential at 150mA load.
Its active-high enable pin drives CMOS logic-level thresholds (VIL ≤ 0.2V, VIH ≥ 1.0V), and the BYP pin accepts a 0.1µF capacitor to reduce reference noise - directly lowering output noise to 20µVrms (10Hz–100kHz) and improving PSRR by up to 20dB at 1kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.6V ±1.0% initial accuracy; ±2.0% over –40°C to +125°C junction temperature. |
| Dropout Voltage | 60mV at 150mA load - enables operation with only 4.66V input when delivering full rated current. |
| PSRR | 85dB at 1kHz with 0.1µF BYP capacitor - suppresses switching noise from upstream DC/DC converters. |
| Output Noise | 20µVrms (10Hz–100kHz) - suitable for powering audio codecs and precision analog circuitry. |
| Ground Current | 90µA typical at light load (100µA output); drops to 0.5µA in shutdown - extends battery life in standby modes. |
| Enable Threshold | Logic-compatible: turns on when EN ≥ 1.0V, shuts down when EN ≤ 0.2V - interfaces directly with 1.8V/3.3V GPIOs. |
| Thermal Resistance | θJA = 93°C/W (MLF-6 package) - supports 150mA continuous output at up to 95°C ambient with minimum copper footprint. |
Pinout & Package
The MIC5305-4.6YML-TR uses a Pb-free, RoHS-compliant 6-pin 2mm × 2mm MLF® (MicroLeadFrame) package with exposed heatsink pad (EPAD) internally connected to GND. The package has no leads; solderable terminals are arranged in a 2×3 grid on the bottom surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable Input | Active-high digital control: drives regulator ON/OFF; must not float; draws ≤1µA when asserted. |
| 2 (GND) | Power Ground | Main return path for load and quiescent current; connects internally to EPAD for thermal conduction. |
| 3 (VIN) | Input Supply | Accepts 2.25V–5.5V; requires 1µF ceramic bypass to GND for stability and transient response. |
| 4 (VOUT) | Regulated Output | Delivers stable 4.6V ±1% to load; requires ≥1µF ceramic output capacitor for loop stability. |
| 5 (NC) | No Connection | Internally unconnected; must remain unconnected on PCB - no routing or stitching allowed. |
| 6 (BYP) | Reference Bypass | Connects to 0.1µF capacitor to GND to reduce reference noise and improve PSRR by up to 20dB. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 60mV @ 150mA enables use with Li-ion batteries down to 4.66V while sustaining full load. |
| Ceramic capacitor stability | Stable with ≥1µF X7R/X5R ceramic output cap - eliminates need for tantalum or electrolytic capacitors. |
| Zero-off-mode shutdown | 0.5µA shutdown current - preserves battery charge during system sleep without external leakage paths. |
| Fast turn-on time | 30µs typical with 1µF COUT and 0.1µF CBYP - meets sequencing requirements in multi-rail portable systems. |
| Integrated protection | Thermal shutdown and current limit (300–900mA) prevent damage during overload or ambient overheating. |
Applications
| Cellular Phone Power Rails | Fiber Optic Module Bias |
|---|---|
|
Use Scenario: Powers RF transceiver bias circuits and baseband processor I/O rails in 4G/LTE smartphones where board area and EMI are critical. IC Role / Device Role / Timing Role: Low-noise post-regulator supplying clean 4.6V to sensitive analog front-end stages. Use Value: 20µVrms noise and 85dB PSRR prevent AM modulation of RF carriers and maintain EVM compliance. |
Use Scenario: Supplies bias voltage to laser diode drivers and transimpedance amplifiers in SFP+ optical transceivers. IC Role / Device Role / Timing Role: Fixed 4.6V LDO providing stable supply for high-speed analog signal chains operating up to 10Gbps. Use Value: 60mV dropout allows operation from 4.8V intermediate bus, minimizing heat generation in thermally constrained modules. |
| Notebook PC Audio Codec Supply | Portable Medical Sensor Node |
|
Use Scenario: Delivers clean power to stereo audio codecs in ultrabooks where shared DC/DC rails introduce switching noise. IC Role / Device Role / Timing Role: Dedicated low-noise LDO decoupling switching regulator ripple before it reaches DAC/ADC sections. Use Value: 0.1µF BYP capacitor reduces output noise to 20µVrms, enabling >95dB SNR in audio playback paths. |
Use Scenario: Powers analog front-end and microcontroller in battery-operated wearable ECG sensors requiring long runtime and signal fidelity. IC Role / Device Role / Timing Role: Primary 4.6V supply for signal conditioning and low-power MCU core logic. Use Value: 90µA quiescent current and zero-off-mode shutdown extend single-cell Li-ion battery life beyond 7 days in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-4602E/TO | 4.6V fixed, 250mA rating, SOT-23-5 package, 115mV dropout @ 250mA, 6.5µA quiescent current. | Higher output current but larger dropout; lacks BYP pin for noise reduction. | Select when higher load current is needed and board space permits SOT-23-5; avoid if <20µVrms noise is required. |
| Torex XC6206P462MR-G | 4.6V fixed, 150mA, SOT-25 package, 120mV dropout @ 150mA, 1.0µA quiescent current, no enable pin. | Ultra-low IQ but no enable/shutdown control; incompatible pinout and no BYP functionality. | Select for always-on, ultra-low-power sensor nodes where enable control and noise performance are secondary. |
Compared with MIC5305-4.6YML-TR, MCP1700-4602E/TO offers higher current headroom but sacrifices noise performance and dropout; XC6206P462MR-G achieves lower quiescent current but removes critical features - enable control, bypass noise filtering, and MLF thermal efficiency - limiting suitability for portable RF/audio designs.
Availability
MIC5305-4.6YML-TR is available at Aetrix Electronics and suitable for cellular phone power rails, fiber optic module bias, notebook PC audio codec supplies, portable medical sensor nodes, and other applications requiring stable component supply with tight voltage tolerance and low-noise operation.
Supply support for MIC5305-4.6YML-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. Its LDO portfolio emphasized ultra-low-noise, low-dropout, and miniature packaging.
The MIC5305 family was designed for battery-powered portable electronics demanding minimal board area, sub-100µA quiescent current, and high PSRR - targeting cellular handsets, PDAs, and optical modules where thermal and EMI constraints dominate.
FAQ
What is the maximum input voltage for the MIC5305-4.6YML-TR?
The MIC5305-4.6YML-TR supports an absolute maximum input voltage of 6V, with recommended operating range from 2.25V to 5.5V. Exceeding 6V may cause permanent damage. At 5.5V input, the device delivers full 150mA output while maintaining 4.6V regulation with 90mV headroom - sufficient for most 5V rail applications.
Does the MIC5305-4.6YML-TR require an external bypass capacitor?
Yes - the MIC5305-4.6YML-TR's BYP pin is designed for a 0.1µF ceramic capacitor to ground to reduce reference noise and improve PSRR. Without it, output noise rises to ~45µVrms and PSRR degrades by ~20dB at 1kHz. The capacitor is mandatory for audio and RF-sensitive applications but may be omitted in non-critical digital supply roles.
Can the MIC5305-4.6YML-TR operate with no load?
Yes - the MIC5305-4.6YML-TR remains stable and in regulation with zero load current, a feature uncommon among LDOs. This makes it suitable for CMOS RAM keep-alive circuits and always-on sensor bias rails where intermittent loading occurs. Ground current stays at 90µA typical under no-load conditions.
What is the thermal performance of the MIC5305-4.6YML-TR in its MLF package?
The MIC5305-4.6YML-TR has a junction-to-ambient thermal resistance (θJA) of 93°C/W in the 2mm × 2mm MLF® package. With 150mA load and 5.0V input, power dissipation is ~0.32W, allowing safe operation up to 95°C ambient temperature using minimum PCB copper footprint - verified per Micrel's thermal modeling in datasheet Section 10.
Is the MIC5305-4.6YML-TR pin-compatible with other MIC5305 variants?
Yes - all MIC5305-x.xYML variants (including MIC5305-4.6YML-TR) share identical 6-pin 2mm × 2mm MLF® pinout, thermal pad connection, and terminal functions. Voltage-setting resistors are internal for fixed-output versions, so swapping between MIC5305-3.3YML-TR and MIC5305-4.6YML-TR requires only firmware or layout revision - no schematic or footprint change.
MIC5305-4.6YML-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):
- 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-DFN (2x2)
MIC5305-4.6YML-TR FAQ
1.How can I place an order for MIC5305-4.6YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-4.6YML-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 MIC5305-4.6YML-TR reliable?
The price and inventory of MIC5305-4.6YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-4.6YML-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-4.6YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-4.6YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-4.6YML-TR?
MIC5305-4.6YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-4.6YML-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 MIC5305-4.6YML-TR?
For technical support, including MIC5305-4.6YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-4.6YML-TR requirements.
6.How does Aetrix verify that MIC5305-4.6YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-4.6YML-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 MIC5305-4.6YML-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-4.6YML-TR?
All MIC5305-4.6YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-4.6YML-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 MIC5305-4.6YML-TR part is unused and in its original packaging.
Return procedure for MIC5305-4.6YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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