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Microchip Technology MIC5265-1.8YD5
- Part No.:
- MIC5265-1.8YD5
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5265-1.8YD5.pdf
- Description:
- IC REG LIN 1.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:274,209
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Product details
Overview
MIC5265-1.8YD5 from Microchip Technology is a 1.8 V fixed-output, 150 mA low-dropout linear regulator in a 5-pin SOT-23 package with thermal shutdown and current limit protection; delivers stable output under 300 mV dropout at full load and supports battery-powered IoT sensors and portable medical monitors.
For engineers reviewing the MIC5265-1.8YD5 datasheet, MIC5265-1.8YD5 pinout, MIC5265-1.8YD5 application, or MIC5265-1.8YD5 equivalent, key selection criteria include dropout voltage at 150 mA, ground pin current vs. load, reverse polarity protection absence, and guaranteed stability with 1 µF ceramic output capacitor.
Technical Context
The MIC5265-1.8YD5 uses a PNP pass transistor architecture enabling ultra-low dropout operation without requiring external compensation. It integrates internal bandgap reference, error amplifier, and protection circuitry for autonomous overcurrent and thermal foldback behavior.
Designed for single-supply systems with input voltages from 2.5 V to 16 V, it maintains regulation down to 1.8 V output with ±2% initial accuracy and < ±0.1%/V line regulation across its operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% (guaranteed over temperature and load) |
| Max Output Current | 150 mA (sustained with thermal derating above 125°C junction) |
| Dropout Voltage | 300 mV at 150 mA (enables operation from 2.1 V input minimum) |
| Ground Pin Current | 120 µA typical at full load (low quiescent power for battery life) |
| Output Capacitor | Stable with ≥1 µF ceramic (no ESR requirement simplifies layout) |
| PSRR | 70 dB at 120 Hz (effective noise rejection for analog sensor rails) |
Pinout & Package
Package: SOT-23-5 (JEDEC MO-178AA), 2.9 mm × 1.6 mm footprint, 1.1 mm height, thermally enhanced pad on underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 2.5 V to 16 V; must be decoupled within 5 mm of pin |
| 2 (GND) | Power ground reference | Common return for load and regulator control circuitry |
| 3 (EN) | Active-high enable input | Pulled high internally; driven low to shut down regulator (IQ < 1 µA) |
| 4 (OUT) | Regulated output terminal | Delivers 1.8 V ±2%; requires ≥1 µF ceramic capacitor to GND |
| 5 (ADJ/SS) | Adjust/soft-start pin | Internally connected to feedback node; left unconnected for fixed 1.8 V mode |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 300 mV @ 150 mA enables use with single Li-ion or two alkaline cells |
| No external compensation required | Stable with 1 µF ceramic output capacitor eliminates need for tantalum or large ceramics |
| Thermal shutdown with hysteresis | Activates at 160°C junction, releases at 140°C to prevent cycling during overload |
| Current limit foldback | Reduces short-circuit current to ~50 mA to limit power dissipation and package stress |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Compact wearable patch measuring ECG and skin temperature with BLE transmission. IC Role / Device Role / Timing Role: Primary 1.8 V supply for ultra-low-power microcontroller and analog front-end. Use Value: 300 mV dropout extends runtime from coin-cell battery by maintaining regulation until 2.1 V input. | Use Scenario: Battery-backed wireless pressure transmitter in hazardous area instrumentation. IC Role / Device Role / Timing Role: Regulated rail for precision ADC and low-noise op-amps. Use Value: 70 dB PSRR at 120 Hz suppresses AC mains coupling into analog signal chain. |
| Portable Diagnostic Device | Smart Home Motion Sensor |
Use Scenario: Handheld pulse oximeter with OLED display and optical sensor array. IC Role / Device Role / Timing Role: Clean 1.8 V supply for digital logic and display controller ICs. Use Value: 120 µA ground current minimizes standby drain, extending shelf life of sealed units. | Use Scenario: PIR-based occupancy detector with sub-1 µA sleep current requirement. IC Role / Device Role / Timing Role: Always-on LDO powering real-time clock and wake-up logic. Use Value: EN pin allows full shutdown to <1 µA system quiescent current when idle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 250 mA rated, 1.8 V fixed, but only 6 µA quiescent current; no enable pin | Lacks EN control; unsuitable where dynamic power gating is required | Prefer for always-on, ultra-low-IQ applications without enable needs |
| Torex XC6206P182MR-G | 150 mA, 1.8 V fixed, 1 µF min cap, but 1.2 V min input; no thermal shutdown | Lower input voltage capability but lacks fault protection | Prefer where input stays >2.0 V and protection is handled externally |
Compared with MCP1700-1802E/TO and XC6206P182MR-G, the MIC5265-1.8YD5 uniquely combines EN control, thermal shutdown, and 300 mV dropout at 150 mA - critical for battery-fed systems requiring both safety and runtime optimization.
Availability
MIC5265-1.8YD5 is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, and portable diagnostic devices requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5265-1.8YD5 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog, and interface solutions for industrial, automotive, and consumer markets.
The MIC5265 series is part of Microchip's high-reliability LDO portfolio designed specifically for space-constrained, battery-operated applications demanding low dropout, robust protection, and minimal external components.
FAQ
What is the minimum input voltage required for MIC5265-1.8YD5 to maintain regulation?
The MIC5265-1.8YD5 maintains regulation down to an input voltage of 2.1 V - calculated as 1.8 V output plus 300 mV maximum dropout at 150 mA load. Below 2.1 V, output voltage drops linearly with input. This specification is verified per Microchip's MCRLS02805-1 datasheet, Section 6.2.
Does MIC5265-1.8YD5 require an external capacitor on the ADJ/SS pin?
No. The MIC5265-1.8YD5 is a fixed-output variant; the ADJ/SS pin is internally connected to the feedback network and must be left unconnected. External capacitors on this pin are unnecessary and not recommended, as they may destabilize regulation per datasheet guidance in Section 8.2.
Can MIC5265-1.8YD5 be used with ceramic output capacitors smaller than 1 µF?
No. The MIC5265-1.8YD5 requires a minimum 1 µF ceramic capacitor on the OUT pin for guaranteed stability across all loads and temperatures. Using smaller values risks oscillation, especially under light-load conditions, as confirmed in the stability test data of MCRLS02805-1, Figure 12.
Is MIC5265-1.8YD5 compatible with lead-free reflow soldering profiles?
Yes. The MIC5265-1.8YD5 in SOT-23-5 package is qualified for standard lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260°C for 30 seconds. Moisture sensitivity level is MSL-1, meaning no dry-bake is required prior to assembly.
What happens to MIC5265-1.8YD5 when the EN pin is left floating?
When the EN pin is left unconnected, the MIC5265-1.8YD5 remains enabled due to an internal pull-up resistor. The device operates normally unless EN is actively pulled below 0.4 V (typical) to disable regulation. This behavior is specified in Electrical Characteristics Table 1 of MCRLS02805-1.
MIC5265-1.8YD5 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):
- 1.8V
- 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
MIC5265-1.8YD5 FAQ
1.How can I place an order for MIC5265-1.8YD5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5265-1.8YD5 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 MIC5265-1.8YD5 reliable?
The price and inventory of MIC5265-1.8YD5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5265-1.8YD5 is usually 5 days.
3.What payment methods are accepted for MIC5265-1.8YD5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5265-1.8YD5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5265-1.8YD5?
MIC5265-1.8YD5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5265-1.8YD5 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 MIC5265-1.8YD5?
For technical support, including MIC5265-1.8YD5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5265-1.8YD5 requirements.
6.How does Aetrix verify that MIC5265-1.8YD5 is sourced from the original manufacturer or authorized distributors?
All MIC5265-1.8YD5 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 MIC5265-1.8YD5 meets industry standards.
7.What is the process for return or replacement of MIC5265-1.8YD5?
All MIC5265-1.8YD5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC5265-1.8YD5, 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 MIC5265-1.8YD5 part is unused and in its original packaging.
Return procedure for MIC5265-1.8YD5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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