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Microchip Technology MIC5305-2.7YD5-TR
- Part No.:
- MIC5305-2.7YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5305-2.7YD5-TR.pdf
- Description:
- IC REG LIN 2.7V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,697
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Product details
Overview
MIC5305-2.7YD5-TR from Micrel is a fixed-output 2.7V, 150mA ultra-low-dropout linear regulator in a thin SOT-23-5 package, featuring 60mV dropout at full load, ±1.0% initial output accuracy, and 20µVrms output noise - optimized for low-power portable audio codec and cellular phone power rails.
For engineers reviewing the MIC5305-2.7YD5-TR datasheet, MIC5305-2.7YD5-TR pinout, MIC5305-2.7YD5-TR application, or MIC5305-2.7YD5-TR equivalent, key selection criteria include dropout voltage under 150mA load, PSRR performance above 65dB at 10kHz, enable pin logic thresholds (VIL ≤ 0.2V, VIH ≥ 1.0V), thermal shutdown behavior, and compatibility with 1µF ceramic output capacitance.
Technical Context
The MIC5305-2.7YD5-TR implements a CMOS-based LDO architecture with integrated quick-start circuitry for bypass capacitor drive, thermal shutdown, and current limit protection. Its error amplifier references a 1.25V internal bandgap and supports stable regulation down to zero load.
It operates across 2.25V–5.5V input range with active-high enable control, uses a dedicated BYP pin for 0.1µF reference bypass to achieve 20µVrms noise, and maintains ±2.0% output accuracy over –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7V ±1.0% initial accuracy; ensures precise biasing for 2.7V-tolerant analog circuits like audio DACs. |
| Max Output Current | 150mA guaranteed; sufficient for powering single-channel audio codecs or baseband ICs in handheld devices. |
| Dropout Voltage | 60mV @ 150mA; enables operation from 2.76V input, critical for battery-powered systems near end-of-discharge. |
| PSRR | 85dB @ 1kHz, 65dB @ 10kHz (with 0.1µF BYP); suppresses switching noise from adjacent DC/DC converters. |
| Ground Current | 90µA typical @ light load; minimizes quiescent power loss in always-on subsystems such as RTC or memory keep-alive rails. |
| Enable Threshold | VIL ≤ 0.2V, VIH ≥ 1.0V; compatible with 1.8V/3.3V GPIO without level-shifting in modern SoC designs. |
| Output Noise | 20µVrms (10Hz–100kHz); meets low-noise requirements for high-fidelity audio signal chain power supplies. |
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 input; requires 1µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Ground Reference | Common return path for load, enable, and bypass; connects internally to exposed heatsink pad. |
| 3 - EN | Enable Input | Active-high CMOS input; must be pulled high (>1.0V) to enable regulation; floating state prohibited. |
| 4 - BYP | Reference Bypass | Connects 0.1µF ceramic capacitor to GND to reduce output noise and improve PSRR above 1kHz. |
| 5 - VOUT | Regulated Output | Delivers stable 2.7V ±1.0%; supports 1µF minimum ceramic output capacitor for unconditional stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 60mV @ 150mA enables >97% efficiency at 2.7V output from 2.76V Li-ion cell residual voltage. |
| Ceramic capacitor stability | Stable with 1µF X7R/X5R ceramic output cap - eliminates need for costly tantalum or electrolytic alternatives. |
| Zero-off-mode current | 0.5µA max shutdown current allows true power gating in battery-backed subsystems. |
| Fast turn-on time | 30µs typical with 1µF COUT and 0.1µF CBYP - supports rapid wake-up in sleep-mode applications. |
| Thermal & current protection | Integrated thermal shutdown and 300–900mA current limit prevent damage during overload or PCB layout faults. |
Applications
| Cellular Phone Power Rail | Audio Codec Supply |
|---|---|
|
Use Scenario: Powers RF transceiver bias and baseband processor I/O rails in dual-SIM smartphones operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO delivering clean 2.7V supply independent of noisy PMIC switchers. Use Value: Prevents AM modulation of RF transmit signals by suppressing 10kHz–1MHz ripple via 65dB PSRR and 20µVrms noise floor. |
Use Scenario: Supplies analog section of stereo audio codec (e.g., AK4642, WM8731) in portable media players. IC Role / Device Role / Timing Role: Precision voltage source for DAC/ADC reference and analog front-end amplifiers. Use Value: Maintains SNR > 95dB by limiting output noise to 20µVrms and ensuring ±1.0% regulation across temperature. |
| Notebook PC Subsystem | Fiber Optic Module Bias |
|
Use Scenario: Provides always-on 2.7V rail for embedded controller (EC) and real-time clock (RTC) during S3/S4 suspend states. IC Role / Device Role / Timing Role: Zero-load-stable LDO maintaining regulation with no output current draw. Use Value: Eliminates need for external pull-down or leakage mitigation, reducing BOM count and standby power by 90µA. |
Use Scenario: Supplies laser diode bias control circuitry in SFP+ optical transceivers requiring tight voltage tolerance. IC Role / Device Role / Timing Role: Low-drift, low-noise auxiliary supply for TIA and laser driver analog blocks. Use Value: ±2.0% output accuracy over –40°C to +125°C ensures consistent optical power calibration across industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2702E/TT | 250mA rated, 1.6µA quiescent current, no BYP pin; 1.8V–6.0V input range. | Lacks bypass-capacitor noise reduction; lower IQ suits ultra-low-power sensor nodes but not audio-sensitive rails. | Select when lowest possible quiescent current is prioritized over noise performance and PSRR. |
| Torex XC6206P272MR-G | 150mA rated, 3µA IQ, no enable pin; 1.8V–6.0V input; 200mV dropout @ 100mA. | No enable/shutdown control; higher dropout limits use in low-VIN battery scenarios. | Select only for cost-sensitive, always-on applications where enable functionality and ultra-low dropout are unnecessary. |
Compared with MCP1700T-2702E/TT and XC6206P272MR-G, the MIC5305-2.7YD5-TR uniquely combines 60mV dropout, 20µVrms noise, and active-high enable in a 5-pin thin SOT-23 - making it the only option among the three suitable for noise-critical, battery-voltage-constrained audio and RF subsystems.
Availability
MIC5305-2.7YD5-TR is available at Aetrix Electronics and suitable for cellular phone power management, audio codec supply, and fiber optic module biasing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5305-2.7YD5-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 power management, analog, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5305 family was designed for space-constrained, battery-operated portable electronics demanding ultra-low dropout, low noise, and minimal board area - targeting cellular handsets, PDAs, and optical modules.
FAQ
What is the maximum input voltage rating for the MIC5305-2.7YD5-TR?
The MIC5305-2.7YD5-TR has an absolute maximum input voltage of 6V, but its specified operating input range is 2.25V to 5.5V. Operation above 5.5V risks permanent damage, while operation below 2.25V may fail to maintain regulation at 2.7V output due to insufficient headroom - especially under 150mA load where dropout is 60mV.
Does the MIC5305-2.7YD5-TR require an external bypass capacitor on the BYP pin?
The MIC5305-2.7YD5-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 MIC5305-2.7YD5-TR operate with no load connected to VOUT?
Yes, the MIC5305-2.7YD5-TR remains stable and in regulation with zero load - a feature explicitly confirmed in the datasheet's Application Information section. This makes it suitable for CMOS RAM keep-alive rails and other always-on, low-current subsystems without requiring dummy loads or external discharge paths.
What is the thermal resistance (θJA) of the MIC5305-2.7YD5-TR in its TSOT-23-5 package?
The MIC5305-2.7YD5-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 Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves significantly with PCB copper pour connected to the exposed pad.
Is the MIC5305-2.7YD5-TR pin-compatible with other variants in the MIC5305 family?
Yes, all MIC5305 variants in the TSOT-23-5 package - including MIC5305-2.7YD5-TR - share identical pinout (VIN, GND, EN, BYP, VOUT), allowing direct substitution between fixed-output versions without PCB changes. However, output voltage, marking, and tape-and-reel packaging differ per variant.
MIC5305-2.7YD5-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):
- 2.7V
- 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
MIC5305-2.7YD5-TR FAQ
1.How can I place an order for MIC5305-2.7YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-2.7YD5-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 MIC5305-2.7YD5-TR reliable?
The price and inventory of MIC5305-2.7YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-2.7YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-2.7YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-2.7YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-2.7YD5-TR?
MIC5305-2.7YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-2.7YD5-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 MIC5305-2.7YD5-TR?
For technical support, including MIC5305-2.7YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-2.7YD5-TR requirements.
6.How does Aetrix verify that MIC5305-2.7YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-2.7YD5-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 MIC5305-2.7YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-2.7YD5-TR?
All MIC5305-2.7YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-2.7YD5-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 MIC5305-2.7YD5-TR part is unused and in its original packaging.
Return procedure for MIC5305-2.7YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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