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Microchip Technology MIC5265-1.85YD5-TR
- Part No.:
- MIC5265-1.85YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5265-1.85YD5-TR.pdf
- Description:
- IC REG LIN 1.85V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,048
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Product details
Overview
MIC5265-1.85YD5 from Micrel is a 150mA low-dropout linear regulator in Pb-Free Thin SOT-23-5 packaging, delivering fixed 1.85V output with 210mV dropout at full load, 57µVrms output noise, and 60dB PSRR at 1kHz. It serves as a clean power source for RF and digital circuitry in portable electronics powered by single-cell Li-ion or 3.3V/5V rails.
For engineers reviewing the MIC5265-1.85YD5 datasheet, MIC5265-1.85YD5 pinout, MIC5265-1.85YD5 application, or MIC5265-1.85YD5 equivalent, key selection criteria include its active shutdown discharge capability, ceramic-capacitor stability, CMOS-compatible enable input, and thermal performance in compact layouts.
Technical Context
The MIC5265-1.85YD5 integrates a precision bandgap reference, error amplifier, and N-channel pass transistor with active shutdown clamp. Its quick-start bypass circuit enables stable operation with 0.01µF–1µF BYP capacitors while minimizing turn-on delay.
It operates across 2.7V–5.5V input, supports zero-load regulation, and features under-voltage lockout, thermal shutdown (150°C), and 10°C hysteresis. Ground current remains ≤150µA up to 150mA load, enabling ultra-low quiescent operation in battery-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85V ±3% over –40°C to +125°C; ensures stable core voltage for 1.8V logic with margin. |
| Dropout Voltage | 210mV at 150mA; allows operation from 2.06V input, compatible with discharged Li-ion cells. |
| Quiescent Current | 75µA typical; minimizes standby power loss in always-on subsystems. |
| PSRR | 60dB at 1kHz; suppresses switching noise from upstream DC/DC converters feeding RF sections. |
| Output Noise | 57µVrms (10Hz–100kHz); meets stringent spectral purity requirements for GPS receiver LNA biasing. |
| Enable Threshold | Logic-high ≥1.6V, logic-low ≤0.2V; interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | 150°C junction temperature with 10°C hysteresis; prevents damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
Pb-Free Thin SOT-23-5 (M5) 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 2.7V–5.5V; requires 1µF low-ESR ceramic bypass to GND for stability. |
| 2 (GND) | Ground Reference | Common return for input, output, and enable; ground pin current ≤150µA at 150mA load. |
| 3 (EN) | Enable Control | CMOS-compatible active-high input; must be pulled high or low-never left floating. |
| 4 (BYP) | Reference Bypass | Connects 0.01µF–1µF capacitor to GND to reduce output noise and improve PSRR. |
| 5 (OUT) | Regulated Output | Delivers 1.85V; stable with ≥1µF ceramic output capacitor (ESR ≤300mΩ). |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | Integrated N-MOSFET clamps OUT to GND when EN = low, preventing floating voltage on powered-down loads. |
| Ceramic-Capacitor Stability | Stable with 1µF X7R/X5R ceramic output cap-no tantalum or electrolytic required, reducing board area and cost. |
| Fast Transient Response | Load step recovery within microseconds (e.g., 100µA ↔ 150mA); maintains regulation during digital processor burst modes. |
| No-Load Regulation | Maintains 1.85V output with zero load current-critical for keeping SRAM or real-time clocks alive during deep sleep. |
| Low-Noise Quick-Start BYP | 0.01µF bypass capacitor reduces noise without degrading turn-on time due to internal fast-charge circuitry. |
Applications
| Cellular Telephone RF Power Supply | GPS Receiver LNA Bias |
|---|---|
Use Scenario: Powers RF front-end ICs (e.g., power amplifiers, mixers) in dual-mode GSM/UMTS handsets where supply ripple directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Low-noise, high-PSRR post-regulator cleaning switched-mode supply output before RF signal chain. Use Value: 57µVrms noise and 60dB PSRR at 1kHz prevent baseband interference and maintain ACPR compliance. | Use Scenario: Supplies low-noise bias to low-noise amplifier (LNA) stages in handheld GPS modules operating indoors or under foliage. IC Role / Device Role / Timing Role: Precision 1.85V reference-stabilized voltage source for analog RF gain blocks requiring minimal phase noise contribution. Use Value: Stable 1.85V output with <±3% accuracy over temperature ensures consistent LNA gain and noise figure across –40°C to +85°C. |
| PDA Core Logic Regulator | Portable Medical Sensor Node |
Use Scenario: Provides regulated 1.85V to ARM9 or MIPS-based application processors in PDAs during dynamic DVFS transitions. IC Role / Device Role / Timing Role: Fast-transient LDO supporting rapid CPU frequency scaling without brownout or reset events. Use Value: Sub-150µs turn-on time and microsecond-scale load transient recovery prevent instruction corruption during clock gating. | Use Scenario: Powers ultra-low-power analog front-end (AFE) and BLE radio in wearable ECG or SpO₂ sensors running on coin-cell batteries. IC Role / Device Role / Timing Role: Energy-efficient voltage regulator enabling multi-week battery life via 75µA quiescent current and zero-load stability. Use Value: 75µA IQ and active shutdown (<2µA) extend shelf life and runtime; 210mV dropout extends usable battery range down to 2.06V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 100mA rating, 6µA quiescent current, no BYP pin, 1.8V output (not 1.85V) | Better for ultra-low-IQ battery-only systems; lacks noise-reduction bypass and active discharge. | Select when lowest possible quiescent current dominates over noise performance and output discharge control. |
| Torex XC6206P182MR-G | 150mA, 1.8V output, no EN or BYP pins, 350mV dropout at 150mA, SOT-23-3 package | Simpler interface (no enable/shutdown), higher dropout limits minimum input voltage to 2.15V. | Select when board space is constrained and enable control or low-noise operation is not required. |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the MIC5265-1.85YD5 uniquely combines 1.85V precision output, active output discharge, and BYP-pin noise optimization-making it optimal for RF-critical, enable-controlled, and ceramic-capacitor–based designs where 1.85V is specified.
Availability
MIC5265-1.85YD5 is available at Aetrix Electronics and suitable for cellular telephony, GPS receivers, PDAs, and portable medical sensor nodes requiring stable component supply, long-term lifecycle support, and Pb-Free compliance.
Supply support for MIC5265-1.85YD5 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 designed for cost-sensitive, space-constrained portable electronics requiring high PSRR, low noise, and active shutdown-targeting RF and digital subsystems in battery-powered devices.
FAQ
What is the maximum input voltage rating for the MIC5265-1.85YD5?
The MIC5265-1.85YD5 has an absolute maximum input voltage of +7V, but its recommended operating range is +2.7V to +5.5V. Exceeding 5.5V may trigger internal protection or cause reliability degradation. For continuous operation, keep VIN within the specified range-especially critical when deriving input from unregulated sources like Li-ion batteries nearing full charge (4.2V) or 5V USB rails.
Does the MIC5265-1.85YD5 require an external bypass capacitor, and what value is recommended?
Yes, the MIC5265-1.85YD5 uses the BYP pin to reduce output noise and improve PSRR. A 0.01µF ceramic capacitor between BYP and GND is recommended for low-noise applications such as RF power supplies. Larger values (up to 1µF) further reduce noise but slightly increase turn-on time; the internal quick-start circuit mitigates this delay. The MIC5265-1.85YD5 remains functional if BYP is left open, but noise performance degrades.
How does the active shutdown feature of the MIC5265-1.85YD5 work, and what is its design impact?
The MIC5265-1.85YD5 integrates an N-channel MOSFET that connects the OUT pin to GND when EN is low. This active discharge rapidly de-energizes downstream circuitry-preventing latch-up, false wakeups, or residual bias in RF or sensor circuits. Unlike passive bleed resistors, it achieves faster discharge with negligible static current. This behavior is confirmed in the functional block diagram and "Active Shutdown" section of the MIC5265-1.85YD5 datasheet.
Can the MIC5265-1.85YD5 operate stably with zero load current?
Yes, the MIC5265-1.85YD5 maintains regulation and stability with no load-unlike many older LDOs that require minimum load current. This is explicitly verified in the "No-Load Stability" section of the MIC5265-1.85YD5 datasheet and is essential for applications like SRAM keep-alive, RTC backup, or BLE sleep-mode operation where load current drops to near-zero between transmissions.
What is the thermal resistance (θJA) of the MIC5265-1.85YD5 in its Thin SOT-23-5 package?
The MIC5265-1.85YD5 in Pb-Free Thin SOT-23-5 (M5) package has a junction-to-ambient thermal resistance (θJA) of 235°C/W on a minimum footprint PCB. This value assumes standard JEDEC test conditions. With 150mA load and 2.7V input → 1.85V output, power dissipation is ~128mW; using θJA, the estimated junction temperature rise is ~30°C above ambient-well within the –40°C to +125°C operating range.
MIC5265-1.85YD5-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):
- 1.85V
- 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
MIC5265-1.85YD5-TR FAQ
1.How can I place an order for MIC5265-1.85YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5265-1.85YD5-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 MIC5265-1.85YD5-TR reliable?
The price and inventory of MIC5265-1.85YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5265-1.85YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5265-1.85YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5265-1.85YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5265-1.85YD5-TR?
MIC5265-1.85YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5265-1.85YD5-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 MIC5265-1.85YD5-TR?
For technical support, including MIC5265-1.85YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5265-1.85YD5-TR requirements.
6.How does Aetrix verify that MIC5265-1.85YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5265-1.85YD5-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 MIC5265-1.85YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5265-1.85YD5-TR?
All MIC5265-1.85YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5265-1.85YD5-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 MIC5265-1.85YD5-TR part is unused and in its original packaging.
Return procedure for MIC5265-1.85YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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