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Microchip Technology MIC5305-2.8YD5-TR
- Part No.:
- MIC5305-2.8YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5305-2.8YD5-TR.pdf
- Description:
- IC REG LIN 2.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,571
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Product details
Overview
MIC5305-2.8YD5-TR from Micrel is a fixed-output 2.8V, 150mA ultra-low-dropout linear regulator in a thin SOT-23-5 package, featuring 60mV dropout at full load, 20µVrms output noise, and 90µA quiescent current - ideal for powering audio codecs and portable RF modules where low noise and battery efficiency are critical.
For engineers reviewing the MIC5305-2.8YD5-TR datasheet, MIC5305-2.8YD5-TR pinout, MIC5305-2.8YD5-TR application, or MIC5305-2.8YD5-TR equivalent, key selection criteria include dropout voltage at 150mA, PSRR performance up to 85dB at 1kHz, thermal shutdown behavior, enable pin logic thresholds, and compatibility with 1µF ceramic output capacitors.
Technical Context
The MIC5305-2.8YD5-TR implements a CMOS-based LDO architecture with an internal 1.25V reference, error amplifier, and quick-start bypass circuitry. It delivers regulated 2.8V output across 2.25V–5.5V input range while maintaining stability with only 1µF ceramic output capacitance.
Its active-high enable pin (VIH ≥ 1.0V, VIL ≤ 0.2V) controls zero-current shutdown mode, and the BYP pin accepts a 0.1µF capacitor to reduce reference noise and improve PSRR - enabling <30µs turn-on time even with bypass capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1.0% initial accuracy; ensures stable biasing for 2.8V-tolerant analog circuits without external feedback. |
| Max Output Current | 150mA guaranteed; supports moderate-power peripherals like RF transceivers or sensor signal chains. |
| Dropout Voltage | 60mV @ 150mA; enables operation down to VIN = 2.86V, extending battery runtime in single-cell Li-ion or Li-poly systems. |
| Ground Current | 90µA typical @ light load; minimizes standby power loss in always-on subsystems such as real-time clocks or keep-alive RAM. |
| Output Noise | 20µVrms (10Hz–100kHz); preserves SNR in sensitive audio codec and ADC reference supplies. |
| PSRR | 85dB @ 1kHz (with 0.1µF BYP cap); suppresses switching noise from adjacent DC/DC converters feeding mixed-signal ICs. |
| Enable Threshold | Logic-compatible: VIH ≥ 1.0V, VIL ≤ 0.2V; interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
Pinout & Package
Package: Thin SOT-23-5 (TSOT-23-5), 2.9mm × 1.6mm × 1.1mm body height, exposed pad thermally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Accepts 2.25V–5.5V; requires 1µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Ground Reference | Common return path for load, enable, and bypass circuits; connects internally to exposed heatsink pad. |
| 3 - EN | Enable Input | Active-high digital control; pulls to GND to disable regulator and reduce supply current to ≤0.5µA. |
| 4 - BYP | Reference Bypass | Connects 0.1µF capacitor to GND to lower output noise and improve PSRR; optional but recommended for audio/RF. |
| 5 - VOUT | Regulated Output | Delivers stable 2.8V ±1% to load; stable with ≥1µF X7R/X5R ceramic capacitor; no minimum load required. |
Key Features
| Feature | Design Value |
|---|---|
| µCap ceramic-stable design | Operates with only 1µF output capacitor - eliminates need for tantalum or large electrolytics, reducing board area and cost. |
| Zero-off-mode shutdown | Draws ≤0.5µA when EN = low - enables true power gating in battery-backed subsystems. |
| Ultra-low-noise regulation | 20µVrms output noise + 85dB PSRR at 1kHz - suitable for powering high-resolution ADCs and audio DACs. |
| Fast turn-on response | <30µs startup with 0.1µF BYP cap - meets timing requirements for wake-from-sleep sequences in portable devices. |
| Thermal & current protection | Integrated thermal shutdown and 300–900mA current limit - prevents damage during overload or ambient temperature excursions. |
Applications
| Cellular Phone Baseband | Fiber Optic Transceiver |
|---|---|
Use Scenario: Powering baseband processor I/O banks and PLL reference supplies in 4G LTE handsets. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO delivering clean 2.8V rail to minimize phase noise and bit error rate. Use Value: 20µVrms noise and 85dB PSRR prevent coupling of digital switching noise into RF synthesizers. | Use Scenario: Supplying laser driver bias and post-amplifier stages in SFP+ optical modules. IC Role / Device Role / Timing Role: Stable 2.8V source for analog front-end circuitry requiring minimal supply-induced jitter. Use Value: 60mV dropout allows operation from 3.3V intermediate bus while preserving headroom for thermal derating. |
| Notebook PC Audio Codec | Portable Medical Sensor Hub |
Use Scenario: Providing dedicated 2.8V AVDD to stereo audio codecs in ultrabooks and 2-in-1 tablets. IC Role / Device Role / Timing Role: Ultra-low-noise LDO isolating sensitive analog audio paths from noisy system rails. Use Value: 20µVrms noise directly improves THD+N performance; no-load stability avoids idle-state oscillation. | Use Scenario: Powering low-power ECG/SpO₂ analog front-ends and SAR ADCs in handheld diagnostic tools. IC Role / Device Role / Timing Role: Precision 2.8V supply with ±1% accuracy and thermal shutdown for patient-critical signal chain integrity. Use Value: 90µA quiescent current extends battery life in intermittent-sampling modes without sacrificing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250mA rated, 1.6µA quiescent current, 170mV dropout @ 250mA; SOT-23-5 package. | Higher IQ enables longer shelf life in energy-harvesting sensors; higher dropout limits use in low-VIN battery systems. | Select when ultra-low IQ dominates over noise and PSRR requirements. |
| Torex XC6206P282MR-G | 150mA rated, 1µA IQ, 350mV dropout @ 150mA; SOT-25 package; no BYP pin. | Lacks bypass pin and PSRR optimization; unsuitable for noise-sensitive audio/RF; smaller footprint. | Select for space-constrained, low-power-only applications where noise immunity is secondary. |
Compared with MIC5305-2.8YD5-TR, MCP1700T-2802E/TT offers lower quiescent current but sacrifices PSRR and noise performance, while XC6206P282MR-G reduces size and IQ but lacks the BYP-controlled noise suppression essential for precision analog rails.
Availability
MIC5305-2.8YD5-TR is available at Aetrix Electronics and suitable for cellular phone baseband power, fiber optic transceiver biasing, and notebook audio codec supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5305-2.8YD5-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, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5305 product line was designed for space-constrained, battery-powered applications demanding ultra-low noise, low dropout, and minimal external components - particularly in portable communications and precision analog systems.
FAQ
What is the maximum input voltage rating for MIC5305-2.8YD5-TR?
The MIC5305-2.8YD5-TR has an absolute maximum input voltage of 6V. Its operational input range is specified from 2.25V to 5.5V. Exceeding 6V may cause permanent damage. For reliable operation at 5.5V input, ensure thermal design accommodates power dissipation - e.g., at 150mA load and 2.8V output, PD ≈ 405mW - and verify PCB copper area meets θJA = 235°C/W for TSOT-23-5.
Does MIC5305-2.8YD5-TR require an external bypass capacitor on the BYP pin?
The MIC5305-2.8YD5-TR does not require the BYP pin to be used - it functions correctly with BYP left open. However, connecting a 0.1µF ceramic capacitor from BYP to GND reduces output noise to 20µVrms and improves PSRR to 85dB at 1kHz. This is strongly recommended for audio, RF, and high-resolution ADC applications where supply noise directly impacts signal integrity.
Can MIC5305-2.8YD5-TR operate with no load connected to VOUT?
Yes, MIC5305-2.8YD5-TR remains stable and in regulation with zero load - a key differentiator from many legacy LDOs. This capability supports applications such as CMOS RAM keep-alive circuits, real-time clock backup supplies, and always-on sensor monitoring nodes where intermittent or zero-load conditions occur regularly without risking oscillation or dropout.
What is the thermal shutdown threshold and hysteresis behavior of MIC5305-2.8YD5-TR?
MIC5305-2.8YD5-TR activates thermal shutdown when junction temperature exceeds +125°C. The device remains latched off until TJ falls below approximately +110°C due to built-in hysteresis. During shutdown, output is disabled and ground current drops to ≤0.5µA. Recovery is automatic upon cooling - no external reset or enable toggling is needed. This protects against sustained overloads in compact enclosures.
Is MIC5305-2.8YD5-TR pin-compatible with other variants in the MIC5305 family?
Yes, all MIC5305 variants in the TSOT-23-5 (D5) package - including MIC5305-2.8YD5-TR, MIC5305-3.3YD5-TR, and MIC5305-1.8YD5-TR - share identical pinout, footprint, and electrical interface. Only the fixed output voltage differs. This enables single-board designs with voltage-selectable options via BOM change, simplifying inventory and qualification across multiple product SKUs.
MIC5305-2.8YD5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 2.8V
- 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:
- TSOT-23-5
MIC5305-2.8YD5-TR FAQ
1.How can I place an order for MIC5305-2.8YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-2.8YD5-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 MIC5305-2.8YD5-TR reliable?
The price and inventory of MIC5305-2.8YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-2.8YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-2.8YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-2.8YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-2.8YD5-TR?
MIC5305-2.8YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-2.8YD5-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 MIC5305-2.8YD5-TR?
For technical support, including MIC5305-2.8YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-2.8YD5-TR requirements.
6.How does Aetrix verify that MIC5305-2.8YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-2.8YD5-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 MIC5305-2.8YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-2.8YD5-TR?
All MIC5305-2.8YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-2.8YD5-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 MIC5305-2.8YD5-TR part is unused and in its original packaging.
Return procedure for MIC5305-2.8YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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