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Microchip Technology MIC5265-3.1YD5-TR
- Part No.:
- MIC5265-3.1YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5265-3.1YD5-TR.pdf
- Description:
- IC REG LIN 3.1V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MIC5265-3.1YD5 from Micrel is a 150mA low-dropout linear regulator in Pb-free Thin SOT-23-5 packaging, delivering a fixed 3.1V output with 210mV dropout at full load, 57µVrms output noise, and 60dB PSRR at 1kHz. It serves as a clean, low-noise power source for RF receiver stages and digital baseband circuitry in portable battery-powered systems.
For engineers reviewing the MIC5265-3.1YD5 datasheet, MIC5265-3.1YD5 pinout, MIC5265-3.1YD5 application, or MIC5265-3.1YD5 equivalent, key selection criteria include its active shutdown discharge capability, compatibility with 0.01µF bypass capacitors for noise reduction, stable operation with ceramic output capacitors ≥1µF, and enable-input logic thresholds (1.6V high / 0.2V low) for precise system-level power sequencing.
Technical Context
The MIC5265-3.1YD5 integrates a CMOS-based error amplifier, reference bypass path, and active N-channel MOSFET shutdown clamp. Its quick-start circuit enables fast turn-on (<150µs) even with 1µF bypass capacitance, while thermal shutdown (150°C) and current limiting (225mA) provide robust protection.
It operates across 2.7V–5.5V input range-compatible with single-cell Li-ion (3.0–4.2V) and fixed 3.3V/5V rails-and maintains regulation down to zero load. Ground pin current remains ≤150µA at 150mA load, supporting ultra-low-quiescent-current system design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1V ±3% over –40°C to +125°C; ensures stable bias for RF synthesizers and ADC references. |
| Dropout Voltage | 210mV at 150mA load; enables operation from 3.31V minimum input-critical for Li-ion end-of-discharge support. |
| Quiescent Current | 75µA typical; minimizes standby power loss in always-on GPS receivers and cellular standby modes. |
| PSRR | 60dB at 1kHz; suppresses switching noise from PMICs or DC-DC converters feeding the LDO input rail. |
| Output Noise | 57µVrms (10Hz–100kHz); meets stringent phase-noise requirements in RF front-end power domains. |
| Enable Threshold | Logic-high ≥1.6V, logic-low ≤0.2V; compatible with 1.8V/3.3V GPIO without level-shifting in host SoC interfaces. |
| Shutdown Current | ≤2µA at VEN = 0V; eliminates leakage paths during deep-sleep states in portable devices. |
Pinout & Package
Package: Pb-Free Thin SOT-23-5 (M5), 1.6mm × 2.9mm footprint, 1.1mm max height, θJA = 235°C/W on minimal PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Input | Accepts 2.7V–5.5V input; requires 1µF ceramic capacitor to GND for stability and high-frequency noise filtering. |
| 2 (GND) | Ground Reference | Low-impedance return path for regulator core and load; ground pin current ≤150µA at full 150mA load. |
| 3 (EN) | Enable Input | Active-high CMOS control: drives output ON when ≥1.6V, OFF when ≤0.2V; must not be left floating. |
| 4 (BYP) | Reference Bypass | Connects 0.01µF–1µF capacitor to GND to reduce reference noise; directly lowers output voltage noise floor. |
| 5 (OUT) | Regulated Output | Delivers 3.1V to load; stable with ≥1µF ceramic output capacitor (ESR ≤300mΩ); includes active discharge FET. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | Integrated N-channel MOSFET clamps OUT to GND during shutdown-prevents floating voltage on downstream circuitry. |
| Ceramic-Capacitor Stability | Guaranteed stable with ≥1µF X7R/X5R ceramic output caps (ESR ≤300mΩ); eliminates need for tantalum or electrolytic alternatives. |
| Low-Noise Bypass Path | Dedicated BYP pin accepts 0.01µF capacitor to cut output noise by >50% versus standard LDOs-optimized for RF synth supplies. |
| Fast Transient Response | Load step recovery <5µs (100µA ↔ 150mA); maintains regulation during burst-mode digital processor activity. |
| No-Load Regulation | Maintains 3.1V output with zero load current-enables reliable keep-alive power for SRAM or real-time clocks. |
Applications
| Cellular Telephone RF Power Supply | GPS Receiver Baseband Core |
|---|---|
Use Scenario: Powers RF synthesizer and low-noise amplifier (LNA) stages in dual-mode GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise 3.1V bias rail isolating sensitive analog RF circuitry from noisy digital supply domains. Use Value: 57µVrms noise and 60dB PSRR prevent reciprocal mixing and phase noise degradation in receiver chain. |
Use Scenario: Supplies 3.1V to GPS baseband processor and correlator ASIC during cold/warm start acquisition. IC Role / Device Role / Timing Role: Primary regulated rail enabling fast wake-up and deterministic timing alignment for satellite signal lock. Use Value: <150µs enable delay and no-load stability ensure immediate power availability without external supervision. |
| PDA Application Processor I/O Rail | Portable Medical Sensor Hub |
Use Scenario: Provides 3.1V I/O voltage for ARM9/ARM11 application processors interfacing with touch controllers and display drivers. IC Role / Device Role / Timing Role: Digitally enabled power domain synchronized with processor sleep/wake cycles via EN pin. Use Value: Active shutdown reduces system standby current to sub-µA levels-extending battery life in always-connected PDAs. |
Use Scenario: Powers ultra-low-power ECG/SpO₂ sensor signal chain and BLE radio in wearable diagnostic patches. IC Role / Device Role / Timing Role: Clean, low-quiescent 3.1V supply for precision analog front-end and wireless transceiver co-location. Use Value: 75µA quiescent current and 210mV dropout maximize usable battery capacity from coin-cell or thin-film Li-ion sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3102E/TT | 300mA rating, 1.6µA quiescent current, no BYP pin, 600mV dropout at 250mA | Lacks active output discharge and dedicated noise-reduction bypass path | Preferred where higher current headroom is needed but RF noise sensitivity is lower |
| TCS2103-3.1V | 150mA rating, 3.5µA quiescent current, 300mV dropout at 150mA, no EN pin | Fixed-on operation only; no system-level enable control or shutdown discharge | Suitable for cost-sensitive, always-on sensor nodes where enable sequencing is unnecessary |
Compared with MCP1700T-3102E/TT and TCS2103-3.1V, the MIC5265-3.1YD5 uniquely combines RF-grade noise performance (57µVrms), active output discharge, and enable-controlled zero-off-state current-making it the only option among the three qualified for noise-critical, digitally sequenced portable RF applications.
Availability
MIC5265-3.1YD5 is available at Aetrix Electronics and suitable for cellular telephones, GPS receivers, PDAs, and portable medical sensors requiring stable component supply, long-term lifecycle continuity, and traceable Pb-free sourcing.
Supply support for MIC5265-3.1YD5 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 analog and mixed-signal semiconductor company headquartered in San Jose, CA, specializing in power management, interface, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5265-3.1YD5 belongs to Micrel's µCap LDO family-designed specifically for space-constrained, battery-operated portable electronics demanding ultra-low noise, fast transient response, and active shutdown in lead-free SOT-23-5 packaging.
FAQ
What is the maximum input voltage rating for the MIC5265-3.1YD5?
The MIC5265-3.1YD5 has an absolute maximum input voltage rating of +7V, but its specified operating range is +2.7V to +5.5V. Exceeding 5.5V may cause permanent damage or unpredictable behavior. For reliable operation with single-cell Li-ion batteries, the MIC5265-3.1YD5 supports full discharge down to 2.7V while maintaining 3.1V output regulation.
Does the MIC5265-3.1YD5 require an external bypass capacitor, and what value is recommended?
Yes-the MIC5265-3.1YD5 features a dedicated BYP pin for noise reduction. A 0.01µF ceramic capacitor connected between BYP and GND is recommended to achieve the specified 57µVrms output noise. Larger values up to 1µF further improve PSRR but slightly increase turn-on time; the MIC5265-3.1YD5's quick-start circuit mitigates this penalty.
Can the MIC5265-3.1YD5 remain stable with no load connected to its output?
Yes-the MIC5265-3.1YD5 is explicitly characterized for no-load stability and maintains regulation at 0mA output current. This feature is critical for applications like SRAM keep-alive circuits or real-time clock backup supplies where continuous, low-current regulation is required without risk of oscillation or dropout.
What is the purpose of the active shutdown function in the MIC5265-3.1YD5?
The MIC5265-3.1YD5 incorporates an integrated N-channel MOSFET that actively discharges the output capacitor when the EN pin is driven low. This prevents residual voltage from lingering on downstream circuitry after shutdown-ensuring safe, deterministic power-down sequencing in multi-rail portable systems and eliminating need for external bleed resistors.
Is the MIC5265-3.1YD5 compatible with ceramic output capacitors, and what ESR range is supported?
Yes-the MIC5265-3.1YD5 is optimized for ceramic output capacitors ≥1µF with ESR ≤300mΩ. X7R or X5R dielectrics are recommended for temperature stability. High-ESR capacitors (e.g., aluminum electrolytic) may induce high-frequency oscillation and are not supported. The MIC5265-3.1YD5 does not require series resistance for stability.
MIC5265-3.1YD5-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):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 2 µA
- Current - Supply (Max):
- 150 µA
- PSRR:
- 64dB ~ 62dB (1kHz ~ 100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MIC5265-3.1YD5-TR FAQ
1.How can I place an order for MIC5265-3.1YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5265-3.1YD5-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 MIC5265-3.1YD5-TR reliable?
The price and inventory of MIC5265-3.1YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5265-3.1YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5265-3.1YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5265-3.1YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5265-3.1YD5-TR?
MIC5265-3.1YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5265-3.1YD5-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 MIC5265-3.1YD5-TR?
For technical support, including MIC5265-3.1YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5265-3.1YD5-TR requirements.
6.How does Aetrix verify that MIC5265-3.1YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5265-3.1YD5-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 MIC5265-3.1YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5265-3.1YD5-TR?
All MIC5265-3.1YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5265-3.1YD5-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 MIC5265-3.1YD5-TR part is unused and in its original packaging.
Return procedure for MIC5265-3.1YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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