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Microchip Technology MIC37110-1.8YM-TR
- Part No.:
- MIC37110-1.8YM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC37110-1.8YM-TR.pdf
- Description:
- IC REG LINEAR 1.8V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,019
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Product details
Overview
MIC37110-1.8YM-TR from Micrel is a fixed-output 1.8V, 1A low-dropout linear regulator in SOIC-8 package, featuring 2% initial output voltage accuracy, 230mV typical dropout at 1A, high PSRR (>60dB up to 1kHz), and low ground current - designed for noise-sensitive power rails in portable multimedia devices and embedded systems.
For engineers reviewing the MIC37110-1.8YM-TR datasheet, MIC37110-1.8YM-TR pinout, MIC37110-1.8YM-TR application, or MIC37110-1.8YM-TR equivalent, key selection criteria include dropout performance under 1A load, thermal behavior in SOIC-8 layout, stability with 2.2µF ceramic output capacitor, and enable-controlled shutdown capability.
Technical Context
This LDO employs a CMOS-based pass element with internal reference and error amplifier, supporting input voltages from 2.375V to 5.5V and delivering regulated 1.8V output with ±2% accuracy over −40°C to +125°C junction temperature. It integrates thermal shutdown and current-limit protection without requiring external components.
The device features an active-high enable (EN) pin compatible with TTL/CMOS logic, enabling system-level power sequencing. Its low-noise architecture and high PSRR make it suitable for post-regulation filtering of switching converter outputs in battery-powered applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures stable core voltage for 1.8V logic ICs without external feedback network. |
| Max Output Current | 1A minimum guaranteed - supports moderate-power SoCs, FPGAs, and memory subsystems. |
| Dropout Voltage | 230mV typical at 1A - enables operation from 2.03V input, critical for single-cell Li-ion or Li-poly battery systems. |
| PSRR | >60dB up to 1kHz - suppresses ripple from upstream DC/DC converters, improving signal integrity in audio/video paths. |
| Ground Current | 250–500µA at 10mA–1A load - minimizes quiescent power loss in always-on subsystems. |
| Input Voltage Range | 2.375V to 5.5V - accommodates wide-input battery and adapter supplies while maintaining regulation. |
| Operating Temp | −40°C to +125°C junction - qualified for automotive infotainment and industrial embedded environments. |
Pinout & Package
Package: SOIC-8 (Power SOIC-8 variant with enhanced thermal performance; θJA = 63°C/W with PCB copper plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high CMOS-compatible control; ties directly to microcontroller GPIO for precise power sequencing. |
| 2 (IN) | Input supply | Accepts 2.375–5.5V unregulated input; requires ≥1µF ceramic bypass capacitor placed adjacent to pin. |
| 3 (OUT) | Regulated output | Delivers 1.8V ±2% to load; stable with ≥2.2µF ceramic output capacitor (X7R/X5R dielectric recommended). |
| 4 (SNS) | Voltage sense | Connects at point-of-load to compensate for PCB trace IR drop; improves load regulation accuracy. |
| 5–8 (GND) | Ground return | Four parallel GND pins joined to internal die attach paddle - lowers thermal resistance and improves EMI immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with 2.2µF ceramic capacitor | Reduces BOM count and board space vs. traditional LDOs requiring ≥10µF tantalum or electrolytic caps. |
| Low ground current (250–500µA) | Extends battery life in standby mode for handheld devices and GPS receivers. |
| Thermal shutdown & current limit | Self-protects against short-circuit or overtemperature events without external circuitry. |
| High PSRR (>60dB @ 1kHz) | Enables clean 1.8V rail downstream of noisy buck converters in multimedia SoC power trees. |
| Enable-controlled shutdown | Reduces quiescent current to ≤5µA - supports ultra-low-power sleep states in portable systems. |
Applications
| Mobile Phone Power Management | Blu-ray Player Audio Subsystem |
|---|---|
Use Scenario: Supplies 1.8V core voltage to baseband processor and RF transceiver during active call and data transmission. IC Role / Device Role / Timing Role: Primary low-noise post-regulator converting 2.5–3.3V intermediate rail to clean 1.8V logic supply. Use Value: 230mV dropout allows sustained operation down to 2.03V input, extending usable battery range by ~8% versus higher-dropout alternatives. | Use Scenario: Powers DAC and analog audio amplifier stages in Blu-ray player mainboard. IC Role / Device Role / Timing Role: Low-noise LDO isolating sensitive analog circuitry from digital switching noise on shared 3.3V rail. Use Value: >60dB PSRR at 1kHz attenuates switching ripple from upstream DC/DC, reducing audible noise in headphone output. |
| Gaming Console Memory Interface | Tablet Application Processor Core Rail |
Use Scenario: Delivers regulated 1.8V to DDR2/DDR3 memory I/O buffers and termination networks. IC Role / Device Role / Timing Role: Point-of-load regulator placed near memory connector to minimize voltage droop during burst transfers. Use Value: SNS pin connection enables remote sensing, maintaining ±2% output accuracy despite 50mΩ PCB trace resistance. | Use Scenario: Provides 1.8V core supply to application processor during video decode and UI rendering. IC Role / Device Role / Timing Role: High-current LDO supporting transient load steps up to 1A with minimal output deviation. Use Value: Fast transient response with 2.2µF ceramic cap limits output voltage dip to <30mV during 100ns–1µs load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC37120-1.8YM | Includes output auto-discharge circuit; otherwise identical electrical specs and pinout. | Required where rapid output discharge on shutdown is needed (e.g., hot-swap interfaces). | Select MIC37120-1.8YM only if automatic VOUT discharge is mandatory; otherwise MIC37110-1.8YM-TR offers same regulation performance with simpler biasing. |
| Torex XC6219B182MR-G | 1.8V fixed, 1A, but uses different enable polarity (active-low) and lacks SNS pin; dropout 250mV typ. | Suitable for cost-sensitive designs without remote sensing or strict PSRR requirements. | Choose XC6219B182MR-G only when enable polarity matches system logic and SNS functionality is unused; verify thermal derating in SOIC-8 layout. |
Compared with MIC37120-1.8YM, the MIC37110-1.8YM-TR omits auto-discharge to reduce complexity and leakage, while compared with XC6219B182MR-G, it provides superior PSRR, remote sensing, and tighter initial accuracy - making it preferable for noise-critical, high-reliability consumer electronics.
Availability
MIC37110-1.8YM-TR is available at Aetrix Electronics and suitable for mobile phones, Blu-ray players, and gaming consoles requiring stable component supply across extended production lifecycles.
Supply support for MIC37110-1.8YM-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 high-performance analog and mixed-signal ICs before its acquisition by Microchip Technology in 2015.
The MIC371xx family was developed specifically for low-noise, high-PSRR power regulation in portable consumer electronics - emphasizing small footprint, low quiescent current, and robust thermal performance in compact packages.
FAQ
What is the maximum input voltage rating for the MIC37110-1.8YM-TR?
The MIC37110-1.8YM-TR has an absolute maximum input voltage of +6V, but its specified operating input voltage range is +2.375V to +5.5V. Operation outside this range may cause malfunction or damage. For reliable 1.8V output, VIN must remain ≥2.03V (1.8V + 230mV dropout) under full 1A load.
Does the MIC37110-1.8YM-TR require an external resistor network for output voltage setting?
No, the MIC37110-1.8YM-TR is a fixed-output LDO with factory-trimmed 1.8V regulation - no external resistors are needed. Unlike the adjustable MIC37112/MIC37122 variants, it uses internal feedback and does not expose an ADJ pin; the SNS pin serves only for remote voltage sensing.
Can the MIC37110-1.8YM-TR be used without connecting the SNS pin?
Yes, the MIC37110-1.8YM-TR functions correctly with the SNS pin left unconnected or tied to OUT. However, connecting SNS directly at the load improves load regulation accuracy by compensating for PCB trace resistance - especially beneficial in high-current or long-trace applications.
What is the thermal resistance (θJA) of the MIC37110-1.8YM-TR in SOIC-8 package?
The MIC37110-1.8YM-TR in SOIC-8 package has a typical junction-to-ambient thermal resistance (θJA) of 63°C/W when mounted on a standard PCB with adequate copper pour. This value assumes pins 5–8 are soldered to a solid ground plane; actual θJA varies with PCB layout and copper area.
Is the MIC37110-1.8YM-TR RoHS compliant?
Yes, the MIC37110-1.8YM-TR is RoHS compliant with the "high-melting solder" exemption per the ordering information note in the datasheet. It meets EU Directive 2011/65/EU requirements for restricted hazardous substances.
MIC37110-1.8YM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 0.4V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 500 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC37110-1.8YM-TR FAQ
1.How can I place an order for MIC37110-1.8YM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37110-1.8YM-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 MIC37110-1.8YM-TR reliable?
The price and inventory of MIC37110-1.8YM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37110-1.8YM-TR is usually 5 days.
3.What payment methods are accepted for MIC37110-1.8YM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37110-1.8YM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37110-1.8YM-TR?
MIC37110-1.8YM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37110-1.8YM-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 MIC37110-1.8YM-TR?
For technical support, including MIC37110-1.8YM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37110-1.8YM-TR requirements.
6.How does Aetrix verify that MIC37110-1.8YM-TR is sourced from the original manufacturer or authorized distributors?
All MIC37110-1.8YM-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 MIC37110-1.8YM-TR meets industry standards.
7.What is the process for return or replacement of MIC37110-1.8YM-TR?
All MIC37110-1.8YM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37110-1.8YM-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 MIC37110-1.8YM-TR part is unused and in its original packaging.
Return procedure for MIC37110-1.8YM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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