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Microchip Technology MIC5265-2.5YD5
- Part No.:
- MIC5265-2.5YD5
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5265-2.5YD5.pdf
- Description:
- IC REG LIN 2.5V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
MIC5265-2.5YD5 from Micrel is a 150mA low-dropout linear regulator in Pb-Free Thin SOT-23-5 packaging, delivering a fixed 2.5V output with 210mV dropout at full load, 57µVrms output noise, and 60dB PSRR at 1kHz - designed for RF power supply rails in portable electronics.
For engineers reviewing the MIC5265-2.5YD5 datasheet, MIC5265-2.5YD5 pinout, MIC5265-2.5YD5 application, or MIC5265-2.5YD5 equivalent, key selection criteria include low-noise operation under 150mA load, active shutdown with output discharge capability, compatibility with ceramic capacitors ≥1µF, and operation from single-cell Li-ion (2.7–5.5V input).
Technical Context
The MIC5265-2.5YD5 integrates a CMOS-compatible enable input, internal reference bypass path via dedicated BYP pin, and an active N-channel MOSFET shutdown clamp that discharges the output capacitor when disabled. Its error amplifier drives a high-bandwidth pass element optimized for fast transient response.
It operates across –40°C to +125°C junction temperature, supports stable regulation with no-load condition, and maintains performance with ceramic output capacitors (1µF, ESR ≤300mΩ), eliminating need for tantalum or electrolytic types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±3% over –40°C to +85°C; enables precise biasing of RF ICs and low-voltage logic. |
| Dropout Voltage | 210mV at 150mA load; allows operation from 2.7V input (e.g., single Li-ion cell at end-of-discharge). |
| Quiescent Current | 75µA typical; minimizes standby power in battery-powered systems with frequent enable/disable cycles. |
| PSRR | 60dB at 1kHz; suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Output Noise | 57µVrms (10Hz–100kHz); meets stringent noise requirements for RF receiver synthesizers and VCOs. |
| Enable Threshold | Logic-high ≥1.6V, logic-low ≤0.2V; compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | Activates at 150°C with 10°C hysteresis; protects device during sustained overload or poor PCB thermal design. |
Pinout & Package
Pb-Free Thin SOT-23-5 (M5/D5) package: 2.9mm × 1.6mm × 1.1mm body, 0.95mm pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Supply Input | Accepts 2.7–5.5V unregulated input; requires 1µF ceramic bypass to GND for stability. |
| 2 (GND) | Ground Reference | Common return for input, output, enable, and bypass paths; low-impedance connection critical for noise control. |
| 3 (EN) | Enable Control | Active-high CMOS input; drives regulator into <2µA off-state when pulled low; must not float. |
| 4 (BYP) | Reference Bypass | Connects 0.01–1.0µF capacitor to GND to reduce reference noise and improve PSRR. |
| 5 (OUT) | Regulated Output | Delivers 2.5V ±3% to load; stable with ≥1µF ceramic capacitor (X7R/X5R dielectric recommended). |
Key Features
| Feature | Design Value |
|---|---|
| Active Shutdown Discharge | Integrated N-MOSFET pulls OUT to GND when EN = low, ensuring rapid de-energization of downstream circuitry. |
| Ceramic-Capacitor Stability | Stable with 1µF X7R ceramic output capacitor (ESR ≤300mΩ); eliminates need for larger, less reliable tantalum types. |
| No-Load Regulation | Maintains 2.5V output accuracy even with zero load current - essential for CMOS RAM keep-alive and always-on monitoring circuits. |
| Fast Transient Response | Settles within microseconds after 100µA ↔ 150mA load steps; prevents brownout in digital baseband processors during burst-mode operation. |
| Low-Noise Quick-Start | Dedicated BYP pin + internal quick-start circuit enables low-noise operation without sacrificing turn-on time (<150µs) even with 1µF bypass cap. |
Applications
| Cellular RF Power Supply | GPS Receiver Bias Rail |
|---|---|
Use Scenario: Powers RF transceiver synthesizer and LNA stages in GSM/WCDMA handsets where input derives from shared 3.3V system rail. IC Role / Device Role / Timing Role: Low-noise 2.5V bias source isolating sensitive analog RF blocks from noisy digital supply domains. Use Value: 57µVrms noise and 60dB PSRR prevent reciprocal mixing and phase noise degradation in local oscillator paths. | Use Scenario: Supplies 2.5V to GPS baseband processor and RF front-end in portable navigation devices powered by Li-ion battery. IC Role / Device Role / Timing Role: Primary voltage regulator enabling clean, stable core voltage during cold-start acquisition and continuous tracking modes. Use Value: 210mV dropout ensures >2.5V output down to 2.7V battery voltage, extending usable runtime per charge cycle. |
| PDA Baseband Core Supply | Portable Medical Sensor Node |
Use Scenario: Delivers regulated 2.5V to ARM9-based PDA application processor core during dynamic DVFS transitions. IC Role / Device Role / Timing Role: Fast-transient LDO supporting microsecond-scale load current changes during CPU frequency scaling. Use Value: Sub-5µs load transient recovery prevents core voltage droop-induced instruction errors or cache corruption. | Use Scenario: Powers ultra-low-power analog front-end and BLE radio in wearable ECG sensor nodes operating from coin-cell or small Li-ion. IC Role / Device Role / Timing Role: Enable-controlled power domain manager enabling duty-cycled sensing with <2µA shutdown current. Use Value: 75µA quiescent current + active shutdown extends battery life beyond 12 months in intermittent-sampling applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | 250mA rating, 1.6µA quiescent current, no BYP pin, 600mV dropout at 250mA | Better for ultra-low-IQ always-on sensors; lacks noise-reduction bypass path for RF use | Select when lowest standby power dominates over RF noise performance |
| TSS721AIDR | 200mA, 120µA IQ, integrated reset, no enable pin, 350mV dropout at 200mA | Suitable for microcontroller power with POR/reset; no active shutdown discharge | Select when system-level reset supervision is required and output discharge is handled externally |
Compared with MCP1700-2502E/TO and TSS721AIDR, the MIC5265-2.5YD5 uniquely combines RF-grade noise performance (57µVrms), active output discharge, and ceramic-capacitor stability in a 150mA/2.5V configuration - making it optimal for noise-sensitive portable RF subsystems where both precision and fast enable control matter.
Availability
MIC5265-2.5YD5 is available at Aetrix Electronics and suitable for cellular telephones, GPS receivers, PDAs, and portable medical sensor nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MIC5265-2.5YD5 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 MIC5265 family was developed as a cost-optimized, low-noise LDO series targeting portable RF and digital applications - emphasizing thin-package integration, ceramic-capacitor compatibility, and active shutdown for battery-constrained designs.
FAQ
What is the maximum input voltage rating for the MIC5265-2.5YD5?
The MIC5265-2.5YD5 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 violate safety margins defined in the Absolute Maximum Ratings table. For reliable operation in single-cell Li-ion systems, VIN should remain within 2.7–4.2V.
Does the MIC5265-2.5YD5 require an external bypass capacitor on the BYP pin?
The MIC5265-2.5YD5 does not require an external bypass capacitor on the BYP pin to function, but adding a 0.01µF capacitor reduces output noise to 57µVrms and improves PSRR. The BYP pin may be left open if noise performance is not critical; however, omitting it forfeits the low-noise advantage explicitly specified in the datasheet for RF applications.
Can the MIC5265-2.5YD5 operate without any load connected to its output?
Yes, the MIC5265-2.5YD5 remains stable and maintains regulation with zero load current - a feature confirmed in the Applications Information section. This no-load stability supports applications like CMOS RAM keep-alive circuits and always-on monitoring functions where output capacitance alone sustains voltage during idle periods.
What is the purpose of the active shutdown feature in the MIC5265-2.5YD5?
The active shutdown feature in the MIC5265-2.5YD5 uses an internal N-channel MOSFET to actively discharge the output capacitor and load when the EN pin is driven low. This ensures rapid de-energization of downstream circuitry, preventing unintended wake-up events or residual voltage hold-up in battery-powered systems - a capability not present in passive-shutdown LDOs.
Is the MIC5265-2.5YD5 compatible with X7R ceramic output capacitors?
Yes, the MIC5265-2.5YD5 is specifically characterized and optimized for use with X7R ceramic output capacitors of 1µF or greater. X7R dielectrics provide stable capacitance (±15% over –40°C to +85°C), low ESR, and compact size - meeting the device's stability requirements without oscillation risk, unlike Z5U or Y5V types which exhibit excessive drift.
MIC5265-2.5YD5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- 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
MIC5265-2.5YD5 FAQ
1.How can I place an order for MIC5265-2.5YD5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5265-2.5YD5 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 MIC5265-2.5YD5 reliable?
The price and inventory of MIC5265-2.5YD5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5265-2.5YD5 is usually 5 days.
3.What payment methods are accepted for MIC5265-2.5YD5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5265-2.5YD5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5265-2.5YD5?
MIC5265-2.5YD5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5265-2.5YD5 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 MIC5265-2.5YD5?
For technical support, including MIC5265-2.5YD5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5265-2.5YD5 requirements.
6.How does Aetrix verify that MIC5265-2.5YD5 is sourced from the original manufacturer or authorized distributors?
All MIC5265-2.5YD5 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 MIC5265-2.5YD5 meets industry standards.
7.What is the process for return or replacement of MIC5265-2.5YD5?
All MIC5265-2.5YD5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC5265-2.5YD5, 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 MIC5265-2.5YD5 part is unused and in its original packaging.
Return procedure for MIC5265-2.5YD5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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