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Microchip Technology MIC37101-1.5YM-TR
- Part No.:
- MIC37101-1.5YM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC37101-1.5YM-TR.pdf
- Description:
- IC REG LINEAR 1.5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
MIC37101-1.5YM-TR from Microchip Technology is a 1A fixed-output low-dropout (LDO) linear voltage regulator delivering 1.5V with ±1% initial accuracy, 280 mV typical dropout at 1A, and stable operation with only 10 µF ceramic output capacitance. It features enable control, open-collector flag output, thermal shutdown, and current limiting - designed for post-regulation in PC add-in cards, battery-powered systems, and low-voltage microcontroller supplies.
For engineers reviewing the MIC37101-1.5YM-TR datasheet, MIC37101-1.5YM-TR pinout, MIC37101-1.5YM-TR application, or MIC37101-1.5YM-TR equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for 1.5V LDO selection in space-constrained, thermally demanding designs.
Technical Context
The MIC37101-1.5YM-TR uses Microchip's proprietary Super βeta PNP pass element to achieve ultra-low dropout (280 mV typ. at 1A) and low ground current (11 mA typ. at 1A), enabling efficient 2.5V-to-1.5V conversion without entering dropout. Its architecture supports fast transient response and reverse leakage protection, critical for battery-backed and SMPS post-regulator applications.
It integrates an active-high TTL/CMOS-compatible enable input (VEN = 2.25V min. for ON) and an open-collector flag output that asserts low when VOUT drops ≥5% below nominal - both referenced to internal 1.240V bandgap. The device operates across –40°C to +125°C junction temperature with guaranteed 1A output current and full protection against overcurrent and thermal overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% initial accuracy - ensures stable core logic or I/O rail without external feedback components. |
| Dropout Voltage | 280 mV typical at 1A - enables reliable 1.5V regulation from as low as 1.78V input, extending battery life in portable systems. |
| Max Output Current | 1A minimum guaranteed - supports high-current digital loads like FPGAs, SoCs, or multi-rail PMICs in compact PCB layouts. |
| Ground Current | 11 mA typical at 1A - minimizes quiescent power loss, critical for always-on subsystems and energy-sensitive designs. |
| Operating Temp Range | –40°C to +125°C junction - qualified for industrial, automotive under-hood, and embedded computing environments. |
| Enable Threshold | 2.25V min. for logic high - compatible with 2.5V/3.3V GPIO without level-shifting, simplifying host controller interface. |
| Flag Threshold | 93% of VOUT (1.40V typ.) - provides early warning of undervoltage events before functional failure occurs. |
Pinout & Package
Package: 8-pin Power SOIC (SOIC-8M), thermally enhanced with integrated die attach paddle connected to pins 5–8 (GND). θJC = 20°C/W - significantly lower than standard SOIC-8, enabling higher power dissipation in constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | Active-high CMOS/TTL-compatible control: ≥2.25V = regulator ON; ≤0.8V or open = shutdown with <2 µA leakage. |
| 2 (IN) | Input supply | Regulator input terminal - accepts 2.25V to 6V; requires ≥1 µF ceramic bypass capacitor if >4 inches from bulk supply. |
| 3 (OUT) | Regulated output | 1.5V fixed output - stable with ≥10 µF X7R/X5R ceramic capacitor; supports 10 mA minimum load for regulation. |
| 4 (FLG) | Error flag output | Open-collector output - pulls low when VOUT falls ≤93% of nominal; requires external pull-up to VIN or VOUT. |
| 5–8 (GND) | Ground / thermal pad | Four GND pins tied internally to exposed thermal paddle - must be soldered to large PCB copper area for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| µCap stability | Stable with 10 µF ceramic output capacitor only - eliminates need for electrolytic or tantalum caps, reducing board area and cost. |
| Super βeta PNP pass element | Reduces base drive requirement to just 2% of load current - improves efficiency and reduces dropout vs. conventional NPN LDOs. |
| Reversed leakage protection | Prevents reverse current flow when VIN < VOUT - protects upstream sources during hot-swap or battery-swapping events. |
| Fast transient response | Handles 100 mA → 1 A load steps with <200 mV undershoot using only 10 µF output cap - ideal for burst-mode digital loads. |
| Thermal shutdown + current limit | Self-protecting under fault: limits output to ~1.6–2.5 A and disables output above +125°C junction - no external circuitry needed. |
Applications
| PC Add-In Card Power | SMPS Post-Regulator |
|---|---|
|
Use Scenario: Powering PCIe-based FPGA accelerators on add-in cards where 3.3V or 2.5V rails are available but 1.5V core voltage is required. IC Role / Device Role / Timing Role: Primary 1.5V LDO regulator providing clean, low-noise supply to FPGA core logic with tight voltage tolerance. Use Value: 280 mV dropout allows direct derivation from 2.5V rail without intermediate conversion, reducing BOM count and improving system efficiency. |
Use Scenario: Tightening ripple and noise on switched-mode power supply outputs feeding sensitive analog or RF circuitry. IC Role / Device Role / Timing Role: Low-noise linear post-regulator filtering high-frequency switching artifacts from buck converters. Use Value: PSRR >60 dB at 100 kHz (with 10 µF ceramic) suppresses SMPS ripple, enabling clean 1.5V supply for ADC reference or PLL VCO circuits. |
| Battery-Powered IoT Node | Low-Voltage Microcontroller Supply |
|
Use Scenario: Regulating Li-ion or 2-cell alkaline battery output (2.4–3.6V) down to stable 1.5V for ultra-low-power sensor nodes. IC Role / Device Role / Timing Role: Main system LDO enabling deep-sleep modes with minimal quiescent current draw. Use Value: 11 mA ground current at 1A and <2 µA shutdown current extend battery runtime while maintaining fast wake-up response. |
Use Scenario: Supplying 1.5V to ARM Cortex-M0+ or RISC-V cores operating at sub-100 MHz with dynamic voltage scaling. IC Role / Device Role / Timing Role: Core voltage regulator ensuring timing margin compliance across temperature and process variation. Use Value: ±1% initial accuracy and 40 ppm/°C tempco guarantee stable clock generation and memory interface timing over –40°C to +85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-1502E/MB | 1.5V fixed, 250 mA max, SOT-23-5; 600 mV dropout at 250 mA; no enable or flag. | Limited to low-current peripherals; lacks monitoring/control features needed for system-level power sequencing. | Select when board space is critical and load <250 mA; avoid for 1A or fault-aware designs. |
| TPS7A2015PDBVR | 1.5V fixed, 300 mA max, SOT-23-5; 170 mV dropout at 300 mA; includes enable but no flag. | Lower dropout at light loads, but insufficient current rating for FPGA or SoC core rails. | Use for auxiliary 1.5V rails with <300 mA demand; not suitable as primary 1A regulator replacement. |
Compared with MCP1703T-1502E/MB and TPS7A2015PDBVR, the MIC37101-1.5YM-TR uniquely delivers 1A output with integrated enable and flag in a thermally robust SOIC-8 package - making it the only option among the three capable of serving as a main 1.5V system rail with full fault visibility and thermal headroom.
Availability
MIC37101-1.5YM-TR is available at Aetrix Electronics and suitable for PC add-in card power, SMPS post-regulation, and battery-powered IoT node designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC37101-1.5YM-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
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and power management ICs, with a focus on reliability, longevity, and embedded system integration.
The MIC37100/01/02 family was engineered specifically for high-current, low-dropout linear regulation in thermally constrained spaces - targeting PC add-in cards, multimedia processors, and battery-powered equipment needing precision 1.5V–3.3V rails.
FAQ
What is the maximum input voltage for MIC37101-1.5YM-TR?
The MIC37101-1.5YM-TR has an absolute maximum input voltage rating of +6.5V, but its specified operating range is +2.25V to +6V. For reliable 1.5V output, VIN must remain ≥1.78V (1.5V + 280 mV dropout) across all load and temperature conditions. Exceeding 6V risks permanent damage.
Does MIC37101-1.5YM-TR require an external resistor network for output voltage setting?
No. The MIC37101-1.5YM-TR is a fixed-output variant - its 1.5V regulation is achieved internally via precision trimming. Unlike the adjustable MIC37102, MIC37101-1.5YM-TR needs no external resistors, simplifying layout and eliminating drift-related inaccuracies.
How does the FLG pin on MIC37101-1.5YM-TR behave during thermal shutdown?
The FLG pin on MIC37101-1.5YM-TR is inactive during thermal shutdown - it neither asserts nor de-asserts. Flag functionality is disabled when junction temperature exceeds +125°C, so FLG only reports undervoltage faults (e.g., overcurrent or low VIN), not thermal events.
Can MIC37101-1.5YM-TR operate without a minimum load current?
No. MIC37101-1.5YM-TR requires a minimum 10 mA load current for proper regulation. Below this, leakage currents dominate and output voltage may rise above 1.5V. A small bleed resistor or system bias current must ensure ≥10 mA load under all operating states.
What thermal PCB layout is required for MIC37101-1.5YM-TR at 1A continuous load?
At 1A with 2.5V input, MIC37101-1.5YM-TR dissipates ~836 mW. To maintain TJ ≤125°C at 50°C ambient, ≥160 mm² of 2-oz copper connected to pins 5–8 (GND) is required. The exposed thermal paddle must be fully soldered to this plane - isolated pads or insufficient copper cause thermal derating.
MIC37101-1.5YM-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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- -
- 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
MIC37101-1.5YM-TR FAQ
1.How can I place an order for MIC37101-1.5YM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37101-1.5YM-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 MIC37101-1.5YM-TR reliable?
The price and inventory of MIC37101-1.5YM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37101-1.5YM-TR is usually 5 days.
3.What payment methods are accepted for MIC37101-1.5YM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37101-1.5YM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37101-1.5YM-TR?
MIC37101-1.5YM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37101-1.5YM-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 MIC37101-1.5YM-TR?
For technical support, including MIC37101-1.5YM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37101-1.5YM-TR requirements.
6.How does Aetrix verify that MIC37101-1.5YM-TR is sourced from the original manufacturer or authorized distributors?
All MIC37101-1.5YM-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 MIC37101-1.5YM-TR meets industry standards.
7.What is the process for return or replacement of MIC37101-1.5YM-TR?
All MIC37101-1.5YM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37101-1.5YM-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 MIC37101-1.5YM-TR part is unused and in its original packaging.
Return procedure for MIC37101-1.5YM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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