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Microchip Technology MIC5305-1.5YD5-TR
- Part No.:
- MIC5305-1.5YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5305-1.5YD5-TR.pdf
- Description:
- IC REG LIN 1.5V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,972
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Product details
Overview
MIC5305-1.5YD5-TR from Micrel is a fixed-output 1.5V, 150mA ultra-low dropout LDO regulator in a thin SOT-23-5 package, featuring 60mV dropout at full load, ±1.0% initial output accuracy, and 20µVrms output noise - designed for space-constrained, battery-powered audio codec and portable electronics power rails.
For engineers reviewing the MIC5305-1.5YD5-TR datasheet, MIC5305-1.5YD5-TR pinout, MIC5305-1.5YD5-TR application, or MIC5305-1.5YD5-TR equivalent, key selection criteria include dropout performance at light-to-full load, enable-pin logic compatibility, ceramic capacitor stability, thermal resistance in TSOT-23-5, and PSRR above 65dB at 10kHz.
Technical Context
The MIC5305-1.5YD5-TR integrates a CMOS-based LDO core with quick-start reference bypass circuitry and thermal shutdown. Its error amplifier drives a low-RDS(on) pass device optimized for 2.25–5.5V input and 1.5V fixed output, enabling stable regulation down to 60mV headroom.
It employs an active-high enable input with 1.0V logic-high threshold and 0.2V logic-low shutdown, drawing only 0.5µA in disabled state. The BYP pin accepts a 0.1µF capacitor to reduce reference noise, improving output noise to 20µVrms and PSRR to 85dB at 1kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1.0% initial accuracy ensures precise biasing for low-voltage analog circuits and I/O rails. |
| Dropout Voltage | 60mV @ 150mA enables operation with minimal input–output differential, critical for single-cell Li-ion or coin-cell systems. |
| PSRR | 85dB @ 1kHz (with 0.1µF BYP cap) suppresses switching noise from upstream DC/DC converters in mixed-signal designs. |
| Output Noise | 20µVrms (10Hz–100kHz) supports low-noise audio codec and RF front-end power without additional filtering. |
| Ground Current | 90µA typical at light load minimizes quiescent drain in always-on keep-alive or standby modes. |
| Enable Threshold | Logic-compatible: 1.0V min high, 0.2V max low - interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Resistance | θJA = 235°C/W in TSOT-23-5 defines maximum ambient temperature limits under 150mA load (e.g., 72°C at 5VIN–1.5VOUT). |
Pinout & Package
Package: Thin SOT-23-5 (TSOT23-5), 5-pin, 2.9mm × 1.6mm × 1.1mm body height, exposed pad internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Supply Input | Accepts 2.25–5.5V; requires 1µF ceramic bypass to GND for stability and transient response. |
| 2 - GND | Ground Reference | Common return for input/output/bypass paths; connects to exposed EPAD for thermal conduction. |
| 3 - EN | Enable Input | Active-high CMOS input; must be pulled high (>1.0V) to enable, low (<0.2V) to enter zero-current shutdown. |
| 4 - BYP | Reference Bypass | Connects 0.1µF ceramic to GND to reduce internal reference noise and improve PSRR/noise performance. |
| 5 - VOUT | Regulated Output | Delivers 1.5V ±1.0% with 150mA capability; requires ≥1µF ceramic output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| µCap ceramic-stable design | Stable with ≥1µF X7R/X5R ceramic output cap - eliminates need for tantalum or electrolytic, reducing board area and cost. |
| Zero-off-mode shutdown | 0.5µA max shutdown current enables true power gating in battery-backed memory or sensor wake-up circuits. |
| Ultra-fast turn-on | 30–100µs startup time (COUT=1µF, CBYP=0.1µF) supports rapid power sequencing in portable devices. |
| Thermal + current protection | Integrated thermal shutdown and 300–900mA current limit prevent damage during overload or ambient overtemperature. |
| No-load regulation | Maintains 1.5V output regulation with zero load - essential for CMOS RAM backup and always-on real-time clock supplies. |
Applications
| Audio Codec Power | Fiber Optic Module Bias |
|---|---|
|
Use Scenario: Powering DAC/ADC analog sections and PLL voltage references in portable audio codecs. IC Role / Device Role / Timing Role: Low-noise 1.5V LDO supplying sensitive analog signal chain blocks. Use Value: 20µVrms noise and 85dB PSRR prevent audible artifacts and jitter degradation in high-fidelity playback. |
Use Scenario: Providing stable bias to laser diode drivers and transimpedance amplifiers in SFP+ modules. IC Role / Device Role / Timing Role: Precision low-dropout supply for optical transmitter/receiver analog front-ends. Use Value: 60mV dropout allows operation from 2.25V rail, extending module runtime on constrained 3.3V intermediate bus. |
| Cellular Phone Baseband | Notebook PC Subsystem Rail |
|
Use Scenario: Supplying 1.5V core voltage to baseband processor I/O banks during active transmission bursts. IC Role / Device Role / Timing Role: Fast-transient LDO supporting dynamic voltage scaling and burst-mode operation. Use Value: 30–100µs turn-on and <0.5% load regulation ensure clean power delivery during RF transmit ramp-up. |
Use Scenario: Delivering 1.5V to embedded controller peripherals (e.g., EC firmware flash, SMBus PHY) in ultrabooks. IC Role / Device Role / Timing Role: Always-on, low-quiescent LDO for subsystems requiring persistent power across sleep states. Use Value: 90µA ground current and no-load stability minimize battery drain during S3/S4 suspend cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/TT | 150mA, 1.5V fixed, 600mV dropout @ 250mA, 2.7–13.2V input, 2.5µA IQ | Higher dropout and wider input range suit higher-VIN industrial sensors, not low-VIN portable use. | Select when input exceeds 5.5V or ultra-low IQ dominates over noise/dropout specs. |
| Torex XC6206P152MR-G | 150mA, 1.5V fixed, 160mV dropout @ 100mA, 2.0–6.0V input, 1.0µA IQ | Lower IQ but higher dropout and lower PSRR (60dB @ 1kHz) - less suitable for noise-sensitive audio. | Prefer for long-life coin-cell applications where IQ matters more than noise or transient response. |
Compared with MIC5305-1.5YD5-TR, MCP1700T-1502E/TT trades ultra-low dropout for wide-input flexibility, while XC6206P152MR-G prioritizes nanoamp IQ over noise suppression and fast turn-on - making MIC5305-1.5YD5-TR optimal for compact, noise-critical, battery-fed 1.5V rails.
Availability
MIC5305-1.5YD5-TR is available at Aetrix Electronics and suitable for cellular phones, audio codec power supplies, fiber optic modules, and notebook PC subsystem rails requiring stable component supply with consistent parametric performance and long-term lifecycle support.
Supply support for MIC5305-1.5YD5-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 family was developed as a µCap ultra-low-noise, low-dropout LDO series targeting portable and battery-powered applications demanding minimal board space and high PSRR.
FAQ
What is the minimum input voltage required for MIC5305-1.5YD5-TR to regulate at 1.5V output?
The MIC5305-1.5YD5-TR requires a minimum input voltage of 1.56V to maintain regulation - calculated from its 60mV typical dropout voltage at 150mA. However, the absolute minimum specified input is 2.25V per datasheet operating conditions, ensuring guaranteed performance across temperature, load, and process variation. Below 2.25V, regulation is not assured even if dropout margin appears sufficient.
Can MIC5305-1.5YD5-TR operate without an output capacitor?
No, MIC5305-1.5YD5-TR requires a minimum 1µF ceramic output capacitor for stability, as confirmed in the Application Information section. Omitting it risks high-frequency oscillation due to phase margin loss. Unlike some regulators, it does not support no-capacitor operation - even no-load stability depends on the presence of the specified output capacitance.
Is the BYP pin mandatory for MIC5305-1.5YD5-TR functionality?
The BYP pin is optional but strongly recommended for noise-sensitive applications. Leaving it open yields 20µVrms output noise and 65dB PSRR at 10kHz; connecting 0.1µF to GND improves noise to 20µVrms (same value, better spectral distribution) and boosts PSRR to 85dB at 1kHz. It is not required for basic regulation but essential for audio or RF-adjacent power domains.
What is the thermal performance limitation of MIC5305-1.5YD5-TR in TSOT-23-5 package?
With θJA = 235°C/W, MIC5305-1.5YD5-TR's maximum ambient temperature is limited under load - e.g., at 5.0VIN, 1.5VOUT, and 150mA, power dissipation is ~0.53W, limiting TA to ~101°C before junction reaches 125°C. Derating is required above 70°C ambient; PCB copper area and airflow significantly impact real-world thermal margin.
Does MIC5305-1.5YD5-TR support adjustable output voltages?
No, MIC5305-1.5YD5-TR is a fixed 1.5V output variant. Only the MIC5305BML/YML (MLF-6) and MIC5305YMT (Thin MLF-6) part numbers offer an ADJ pin for external resistor programming. The TSOT-23-5 package variants like MIC5305-1.5YD5-TR have NC (no-connect) on Pin 5 and lack internal adjust circuitry - output is factory-trimmed and non-configurable.
MIC5305-1.5YD5-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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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:
- TSOT-23-5
MIC5305-1.5YD5-TR FAQ
1.How can I place an order for MIC5305-1.5YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5305-1.5YD5-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 MIC5305-1.5YD5-TR reliable?
The price and inventory of MIC5305-1.5YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5305-1.5YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5305-1.5YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5305-1.5YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5305-1.5YD5-TR?
MIC5305-1.5YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5305-1.5YD5-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 MIC5305-1.5YD5-TR?
For technical support, including MIC5305-1.5YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5305-1.5YD5-TR requirements.
6.How does Aetrix verify that MIC5305-1.5YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5305-1.5YD5-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 MIC5305-1.5YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5305-1.5YD5-TR?
All MIC5305-1.5YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5305-1.5YD5-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 MIC5305-1.5YD5-TR part is unused and in its original packaging.
Return procedure for MIC5305-1.5YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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