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Microchip Technology MIC5305-2.85YD5-TR
- Part No.:
- MIC5305-2.85YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5305-2.85YD5-TR.pdf
- Description:
- IC REG LIN 2.85V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
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Product details
Overview
MIC5305-2.85YD5-TR from Micrel is a fixed-output 2.85V, 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 MIC5305-2.85YD5-TR datasheet, MIC5305-2.85YD5-TR pinout, MIC5305-2.85YD5-TR application, or MIC5305-2.85YD5-TR equivalent, key selection criteria include dropout voltage at 150mA, PSRR performance up to 85dB at 1kHz, enable-input logic thresholds, thermal resistance (235°C/W), and compatibility with 1µF ceramic output capacitors.
Technical Context
The MIC5305-2.85YD5-TR integrates a CMOS-based LDO core with a precision bandgap reference, quick-start bypass circuitry, and internal thermal shutdown and current-limit protection. Its architecture enables stable regulation with no-load operation and supports fast turn-on (≤100µs) when paired with a 0.1µF bypass capacitor.
It operates across 2.25V–5.5V input range, maintains ±1.0% initial output accuracy and ±2.0% over temperature, and achieves high PSRR via active reference bypassing - delivering 85dB rejection at 1kHz and 65dB at 10kHz with 0.1µF on the BYP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±1.0% initial accuracy ensures precise biasing for 2.8V–3.0V logic rails and analog circuits. |
| Max Output Current | 150mA guaranteed delivery supports single-rail power for baseband ICs, sensor interfaces, and low-power microcontrollers. |
| Dropout Voltage | 60mV at 150mA enables operation with minimal headroom - e.g., 2.91V input sustains 2.85V output under full load. |
| Ground Current | 90µA typical quiescent current minimizes battery drain in always-on keep-alive and sleep-mode applications. |
| Output Noise | 20µVrms (10Hz–100kHz) supports low-noise analog stages like audio DACs and RF front-end biasing. |
| PSRR | 85dB at 1kHz with 0.1µF BYP capacitor suppresses switching noise from upstream DC/DC converters. |
| Enable Threshold | Logic-compatible EN pin activates above 1.0V and shuts down below 0.2V - compatible with 1.8V/3.3V GPIO control. |
Pinout & Package
Package: Thin SOT-23-5 (TSOT-23-5), 5-pin, 2.9mm × 1.6mm × 1.1mm body height, exposed pad internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Accepts 2.25V–5.5V input; requires 1µF ceramic decoupling to GND for stability. |
| 2 - GND | Ground Reference | Primary return path; connects internally to exposed thermal pad for heat dissipation. |
| 3 - EN | Enable Input | Active-high CMOS input; must be pulled high (>1.0V) to enable regulation; floating prohibited. |
| 4 - VOUT | Regulated Output | Delivers stable 2.85V; requires ≥1µF X7R/X5R ceramic capacitor to GND for loop stability. |
| 5 - BYP | Reference Bypass | Connects 0.1µF capacitor to GND to reduce output noise and improve PSRR; open-circuit allowed. |
Key Features
| Feature | Design Value |
|---|---|
| µCap ceramic-stable design | Operates stably with only 1µF output capacitance - eliminates need for large tantalum or electrolytic caps. |
| Zero-off-mode shutdown | Draws ≤0.5µA when EN ≤ 0.2V - enables true power gating in battery-backed systems. |
| Thermal + current protection | Internally limits output current to 300–900mA and disables output if junction exceeds 125°C. |
| No-load regulation | Maintains 2.85V output with zero load - essential for CMOS RAM backup and real-time clock power rails. |
| Fast transient response | Load step recovery within microseconds due to high-bandwidth error amplifier and quick-start BYP circuit. |
Applications
| Audio Codec Power Supply | Fiber Optic Transceiver Bias |
|---|---|
Use Scenario: Powers DAC/ADC sections in portable audio subsystems requiring clean, low-noise supply. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering 2.85V to analog signal chain components. Use Value: 20µVrms noise and 85dB PSRR prevent audible artifacts and SNR degradation in 24-bit audio paths. | Use Scenario: Supplies bias voltage to laser diode drivers and post-amplifiers in SFP+ optical modules. IC Role / Device Role / Timing Role: Stable 2.85V rail for analog front-end circuitry sensitive to supply ripple. Use Value: Ultra-low dropout enables operation from shared 3.3V intermediate bus while maintaining margin under load transients. |
| Portable Medical Sensor Node | Low-Power IoT MCU Core Rail |
Use Scenario: Powers precision analog front-end of wearable ECG/PPG sensors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Main supply for signal conditioning amplifiers and ADC reference buffers. Use Value: 90µA quiescent current extends battery life beyond 1 year in duty-cycled sensing applications. | Use Scenario: Provides regulated 2.85V core voltage to ARM Cortex-M0+ microcontrollers in BLE-enabled edge devices. IC Role / Device Role / Timing Role: Primary system LDO enabling deep-sleep mode with fast wake-up capability. Use Value: ≤100µs turn-on time and zero-off-mode shutdown support sub-100ms wake-from-sleep latency requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-285I/TT | 300mA rated, 1.6µA quiescent current, 170mV dropout @ 250mA; SOT-23-5 package. | Higher IOUT but higher dropout and noise (30µVrms); lacks BYP pin for noise optimization. | Select when higher output current is needed and lower noise is not critical. |
| TCS2115-2.85V | 150mA rated, 25µVrms noise, 65mV dropout @ 150mA; same SOT-23-5 footprint. | Slightly higher noise and dropout; no enable pin - always-on operation only. | Select when enable functionality is unnecessary and cost sensitivity outweighs feature parity. |
Compared with MIC5305-2.85YD5-TR, MCP1700T-285I/TT trades ultra-low noise and enable control for higher current capacity, while TCS2115-2.85V offers matching current and package but omits EN and BYP pins - making MIC5305-2.85YD5-TR optimal for noise-sensitive, enable-controlled portable designs.
Availability
MIC5305-2.85YD5-TR is available at Aetrix Electronics and suitable for portable medical sensors, fiber optic transceivers, audio codec power supplies, and low-power IoT MCU core rails requiring stable component supply across production volumes.
Supply support for MIC5305-2.85YD5-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 family was designed specifically for space-constrained, battery-powered applications demanding ultra-low noise, low quiescent current, and ceramic-capacitor stability - targeting portable communications and precision analog systems.
FAQ
What is the maximum input voltage rating for the MIC5305-2.85YD5-TR?
The MIC5305-2.85YD5-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 long-term operation, maintain VIN within the specified 2.25–5.5V window, especially under thermal stress or high load conditions.
Does the MIC5305-2.85YD5-TR require an external bypass capacitor on the BYP pin?
The MIC5305-2.85YD5-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. Leaving BYP open results in higher noise and lower PSRR - acceptable only in non-critical digital supply applications.
Can the MIC5305-2.85YD5-TR operate without any load connected to VOUT?
Yes, the MIC5305-2.85YD5-TR remains stable and in regulation with zero load - a key differentiator from many legacy LDOs. This no-load stability is confirmed in the datasheet and enables use in CMOS RAM keep-alive circuits, RTC backup rails, and other always-on low-power nodes where intermittent or zero-current draw is expected.
What is the thermal resistance (θJA) of the MIC5305-2.85YD5-TR in its TSOT-23-5 package?
The MIC5305-2.85YD5-TR in the thin SOT-23-5 (D5) package has a junction-to-ambient thermal resistance (θJA) of 235°C/W, as specified in the datasheet. This value assumes standard PCB layout with minimal copper; adding thermal vias to the exposed pad significantly improves heat dissipation and lowers effective θJA in production layouts.
Is the MIC5305-2.85YD5-TR pin-compatible with other variants in the MIC5305 family?
Yes, all MIC5305 variants in the TSOT-23-5 (D5) package - including MIC5305-2.85YD5-TR, MIC5305-3.0YD5-TR, and MIC5305-3.3YD5-TR - share identical pinout, footprint, and electrical interface. Only the fixed output voltage differs; no PCB redesign is required when substituting between D5-package versions with compatible voltage requirements.
MIC5305-2.85YD5-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):
- 2.85V
- 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:
- TSOT-23-5
MIC5305-2.85YD5-TR FAQ
1.How can I place an order for MIC5305-2.85YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-2.85YD5-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 MIC5305-2.85YD5-TR reliable?
The price and inventory of MIC5305-2.85YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-2.85YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-2.85YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-2.85YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-2.85YD5-TR?
MIC5305-2.85YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-2.85YD5-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 MIC5305-2.85YD5-TR?
For technical support, including MIC5305-2.85YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-2.85YD5-TR requirements.
6.How does Aetrix verify that MIC5305-2.85YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-2.85YD5-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 MIC5305-2.85YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-2.85YD5-TR?
All MIC5305-2.85YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-2.85YD5-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 MIC5305-2.85YD5-TR part is unused and in its original packaging.
Return procedure for MIC5305-2.85YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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