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Microchip Technology MIC5305-2.9YML-TR
- Part No.:
- MIC5305-2.9YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5305-2.9YML-TR.pdf
- Description:
- IC REG LINEAR 2.9V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,840
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Product details
Overview
MIC5305-2.9YML-TR from Micrel is a fixed-output 2.9V, 150mA ultra-low-dropout linear regulator in a 6-pin 2mm × 2mm MLF® package, featuring 60mV dropout at full load, ±1.0% initial output accuracy, and 20µVrms output noise. It delivers stable power to noise-sensitive analog circuitry in space-constrained portable systems.
For engineers reviewing the MIC5305-2.9YML-TR datasheet, MIC5305-2.9YML-TR pinout, MIC5305-2.9YML-TR application, or MIC5305-2.9YML-TR equivalent, key selection criteria include dropout voltage under 150mA load, PSRR performance up to 85dB at 1kHz, enable pin logic compatibility, thermal shutdown behavior, and ceramic capacitor stability with 1µF output capacitance.
Technical Context
The MIC5305-2.9YML-TR implements a CMOS-based LDO architecture with an internal 1.25V reference and error amplifier driving a PMOS pass transistor. Its quick-start bypass circuit enables fast turn-on (<30µs) even with 0.1µF on the BYP pin, while maintaining low-noise operation.
It integrates thermal shutdown and current-limit protection, operates across 2.25V–5.5V input range, and draws only 90µA quiescent current at light load. The device remains stable with no-load conditions and supports zero-off-mode current (≤0.5µA) when EN is low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9V ±1.0% initial accuracy; ensures precise biasing for 2.85V–2.95V-tolerant loads like audio codecs. |
| Dropout Voltage | 60mV @ 150mA; enables regulation down to VIN = 2.96V, critical for single-cell Li-ion or Li-poly battery systems. |
| PSRR | 85dB @ 1kHz (with 0.1µF BYP); suppresses switching noise from adjacent DC/DC converters in mixed-signal PCBs. |
| Output Noise | 20µVrms (10Hz–100kHz); meets low-noise requirements for ADC references and RF front-end power rails. |
| Quiescent Current | 90µA typical @ 100µA load; extends battery life in always-on sensor nodes and standby circuits. |
| Enable Threshold | VIL ≤ 0.2V (shutdown), VIH ≥ 1.0V (enable); compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | Activates at TJ ≥ +125°C; protects against sustained overload in compact enclosures with limited airflow. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (leadless, exposed pad grounded), 0.5mm pitch, JEDEC MO-220 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Active-high enable input | CMOS-compatible control signal; must be pulled high or low-never left floating-to avoid indeterminate output state. |
| 2 - GND | Power ground reference | Connects to system ground plane; exposed pad (EPAD) is internally tied to GND for thermal and electrical performance. |
| 3 - VIN | Input supply connection | Accepts 2.25V–5.5V; requires 1µF ceramic bypass capacitor placed close to pin for stability. |
| 4 - VOUT | Regulated output terminal | Delivers 2.9V ±1% to load; stable with ≥1µF X7R/X5R ceramic capacitor; no minimum load required. |
| 5 - NC | No-connect terminal | Not bonded internally; must remain unconnected-no routing or soldering permitted. |
| 6 - BYP | Reference bypass node | Connects 0.1µF ceramic capacitor to GND to reduce output noise by ~20µVrms and improve PSRR above 10kHz. |
Key Features
| Feature | Design Value |
|---|---|
| µCap ceramic-stable design | Stable with 1µF X7R ceramic output capacitor-eliminates need for larger, higher-ESR tantalum or aluminum electrolytics. |
| Zero-off-mode current | Draws ≤0.5µA when EN ≤ 0.2V-enables true power gating in battery-backed memory retention circuits. |
| Ultra-thin profile | 0.55mm max height (MLF® package)-fits beneath stacked components in ultra-thin mobile modules and wearables. |
| High PSRR with bypass | 85dB @ 1kHz and 65dB @ 10kHz using 0.1µF BYP capacitor-critical for powering RF transceivers and high-resolution ADCs. |
| Fast turn-on time | 30µs typical with 1µF COUT and 0.1µF CBYP-supports rapid wake-up sequences in low-power microcontroller applications. |
Applications
| Cellular Phone Power Rails | Fiber Optic Module Bias |
|---|---|
Use Scenario: Supplying clean 2.9V bias to RF power amplifiers and baseband ICs in 4G/LTE handsets operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 2.9V rail with ultra-low noise and high PSRR to isolate sensitive RF sections from noisy digital domains. Use Value: Enables >85dB PSRR suppression of DC/DC ripple at 1–10kHz, preserving EVM and ACLR performance in transmit chains. | Use Scenario: Providing stable 2.9V bias to laser diode drivers and transimpedance amplifiers in SFP+ optical transceivers. IC Role / Device Role / Timing Role: Low-noise post-regulator for analog front-end circuitry requiring <25µVrms noise floor and minimal thermal drift. Use Value: 20µVrms output noise and ±2.0% output accuracy over –40°C to +125°C ensure consistent laser bias and receive sensitivity across industrial temperature range. |
| Notebook PC Audio Codec Supply | Portable Medical Sensor Node |
Use Scenario: Powering stereo audio codecs (e.g., Cirrus Logic CS42L52) in ultrabooks where EMI-sensitive analog audio paths coexist with high-speed digital buses. IC Role / Device Role / Timing Role: Dedicated low-noise LDO supplying VDDA rail; decoupled via BYP pin to minimize coupling into ADC/DAC reference paths. Use Value: 0.1µF BYP capacitor reduces broadband noise by 30%, directly improving SNR and THD+N in headphone outputs. | Use Scenario: Regulating 2.9V for ultra-low-power biosensor signal chains (ECG, pulse oximetry) powered by coin-cell or small Li-ion batteries. IC Role / Device Role / Timing Role: Always-on LDO supporting sub-100µA sleep current and fast wake-up (<50µs) for event-triggered sampling. Use Value: 90µA quiescent current and zero-off-mode enable extend 3V coin-cell life beyond 2 years in intermittent-sampling configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2902E/TT | 250mA rated, 1.6µA quiescent current, 170mV dropout @ 250mA, SOT-23-3 package | Lacks enable pin and BYP pin; no PSRR spec >10kHz; unsuitable for noise-critical analog rails | Select when ultra-low IQ dominates over noise/PSRR; not recommended for MIC5305-2.9YML-TR's target applications. |
| TCS2112-2.9V | 150mA rated, 100µA IQ, 120mV dropout @ 150mA, 6-pin DFN (2×2mm), no BYP pin | Lower PSRR (70dB @ 1kHz), no bypass option, same footprint but different pinout (EN on Pin 5) | Acceptable for cost-sensitive designs where 25mV higher dropout and 15dB lower PSRR are tolerable. |
Compared with MCP1700T-2902E/TT and TCS2112-2.9V, the MIC5305-2.9YML-TR uniquely combines 60mV dropout, 85dB PSRR, 20µVrms noise, and BYP-enabled noise filtering in a 2mm × 2mm MLF®-making it the only choice for high-fidelity portable analog power delivery.
Availability
MIC5305-2.9YML-TR is available at Aetrix Electronics and suitable for cellular phone power management, fiber optic module biasing, and notebook audio codec supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5305-2.9YML-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.
The MIC5305 product line was designed for ultra-compact, battery-powered portable electronics requiring high PSRR, low noise, and µCap ceramic stability-targeting cellular handsets, PDAs, and optical modules.
FAQ
What is the maximum input voltage rating for the MIC5305-2.9YML-TR?
The MIC5305-2.9YML-TR has an absolute maximum input voltage (VIN) rating 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: at 150mA load and 2.9V output, PD ≈ (5.5 − 2.9) × 0.15 = 0.39W, requiring appropriate copper area per the 93°C/W θJA rating.
Does the MIC5305-2.9YML-TR require an external resistor network for output voltage setting?
No, the MIC5305-2.9YML-TR is a fixed-output variant and does not require external resistors. Its 2.9V output is factory-trimmed; Pin 5 is marked NC (no connection) and must remain unconnected. Only the adjustable MIC5305BML/YML variants use the ADJ pin with external R1/R2 dividers to set output between 1.25V and 5.5V.
Can the MIC5305-2.9YML-TR operate without any load connected to VOUT?
Yes, the MIC5305-2.9YML-TR remains stable and in regulation with zero load. This no-load stability is explicitly confirmed in the datasheet and is essential for applications such as CMOS RAM keep-alive circuits or standby power rails where output current may drop to 0µA between wake events.
What is the purpose of the BYP pin on the MIC5305-2.9YML-TR, and what capacitor value is recommended?
The BYP pin connects to the internal voltage reference node; placing a 0.1µF ceramic capacitor from BYP to GND reduces output voltage noise to 20µVrms and improves PSRR-especially above 10kHz. Larger values (e.g., 1µF) further reduce noise but increase turn-on time slightly. Leaving BYP open results in higher noise (≈35µVrms) and degraded high-frequency PSRR.
Is the exposed pad (EPAD) on the MIC5305-2.9YML-TR package electrically connected, and how should it be handled in layout?
Yes, the EPAD on the MIC5305-2.9YML-TR is internally connected to GND and must be soldered to a solid ground plane for optimal thermal performance and electrical stability. The datasheet specifies θJA = 93°C/W for the minimum recommended footprint; omitting thermal vias or undersized copper will raise junction temperature and risk premature thermal shutdown under 150mA load.
MIC5305-2.9YML-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):
- 2.9V
- 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)
MIC5305-2.9YML-TR FAQ
1.How can I place an order for MIC5305-2.9YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-2.9YML-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 MIC5305-2.9YML-TR reliable?
The price and inventory of MIC5305-2.9YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-2.9YML-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-2.9YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-2.9YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-2.9YML-TR?
MIC5305-2.9YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-2.9YML-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 MIC5305-2.9YML-TR?
For technical support, including MIC5305-2.9YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-2.9YML-TR requirements.
6.How does Aetrix verify that MIC5305-2.9YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-2.9YML-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 MIC5305-2.9YML-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-2.9YML-TR?
All MIC5305-2.9YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-2.9YML-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 MIC5305-2.9YML-TR part is unused and in its original packaging.
Return procedure for MIC5305-2.9YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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