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Microchip Technology MIC37101-1.8BM
- Part No.:
- MIC37101-1.8BM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC37101-1.8BM.pdf
- Description:
- IC REG LINEAR 1.8V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,859
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Product details
Overview
MIC37101-1.8BM from Microchip Technology is a low-dropout linear regulator (LDO) delivering 1 A output current with 1.8 V fixed output voltage, ±2% accuracy, and 340 mV dropout at full load. It operates from 2.25 V to 6 V input, features thermal shutdown and current limiting, and is used in FPGA core power, DSP supply rails, and portable embedded systems.
For engineers reviewing the MIC37101-1.8BM datasheet, MIC37101-1.8BM pinout, MIC37101-1.8BM application, or MIC37101-1.8BM equivalent, key selection criteria include dropout voltage at 1 A, load regulation over temperature, PSRR at 1 kHz, enable logic polarity, and thermal performance in SOIC-8EP packaging.
Technical Context
The MIC37101-1.8BM uses a PNP pass transistor architecture enabling stable regulation with ceramic output capacitors ≥1 µF. Its internal bandgap reference and error amplifier provide tight DC accuracy and transient response under dynamic load steps up to 100 mA/µs.
Enable functionality is active-high with 1.2 V logic threshold; undervoltage lockout disables regulation when VIN falls below 2.0 V. The device integrates foldback current limiting and thermal shutdown with automatic recovery after cooldown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% - ensures compliance with 1.8 V I/O or core supply requirements for modern microcontrollers and FPGAs. |
| Max Output Current | 1 A continuous - supports high-current digital loads without external pass devices. |
| Dropout Voltage | 340 mV at 1 A - enables operation from 2.25 V input while maintaining regulation, critical for single-cell Li-ion or multi-cell alkaline systems. |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Quiescent Current | 120 µA typical - minimizes standby power loss in battery-powered applications. |
| Operating Input Range | 2.25 V to 6 V - compatible with common intermediate bus voltages and wide-input industrial supplies. |
Pinout & Package
Package: SOIC-8EP (exposed pad), RoHS-compliant, thermal resistance θJA = 50°C/W on 2-layer board with 1-in² copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.25–6 V; requires local 1 µF ceramic decoupling within 5 mm. |
| GND | Power ground reference | Common return for input/output paths; connects to exposed pad for thermal conduction. |
| EN | Enable control input | Active-high logic; pulls low to disable regulator and reduce quiescent current to 1 µA. |
| OUT | Regulated output | Delivers 1.8 V ±2% to load; requires ≥1 µF ceramic capacitor with ESR < 100 mΩ. |
| ADJ/SENSE | Feedback node | Internally connected to 1.8 V reference; not user-accessible in fixed-output variant. |
| EPAD | Thermal and electrical ground | Must be soldered to PCB ground plane to achieve rated 1 A current and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with ceramic output capacitors | Eliminates need for tantalum or aluminum electrolytic capacitors, reducing size, cost, and failure risk in space-constrained designs. |
| Thermal shutdown with auto-recovery | Prevents permanent damage during overload or poor heatsinking; resumes regulation once die temperature drops below 140°C. |
| Active-high enable with precise threshold | Enables clean power sequencing in multi-rail systems using standard 1.8 V or 3.3 V logic signals without level-shifting. |
| Low-noise output with high PSRR | Reduces need for additional filtering stages when powering noise-sensitive analog or RF circuitry downstream. |
Applications
| FPGA Core Power | DSP Supply Rail |
|---|---|
Use Scenario: Powering 1.8 V core voltage of Xilinx Spartan-7 or Intel MAX 10 FPGA during configuration and active operation. IC Role / Device Role / Timing Role: Primary low-noise, high-current LDO providing stable core rail with fast transient response to logic switching currents. Use Value: Maintains <±2% output accuracy across –40°C to +125°C junction temperature, ensuring reliable FPGA operation without brownout resets. | Use Scenario: Supplying 1.8 V I/O bank of TI C6748 DSP in audio processing equipment with variable load profiles. IC Role / Device Role / Timing Role: Clean post-regulator following a buck converter, rejecting switching ripple via 70 dB PSRR at 1 kHz. Use Value: Enables <10 mVPP output ripple under 500 mA dynamic load, preserving ADC SNR and DAC linearity. |
| Portable Embedded System | Industrial Sensor Node |
Use Scenario: Powering ARM Cortex-M4 MCU and associated peripherals in handheld test instrument powered by single-cell Li-ion (2.7–4.2 V). IC Role / Device Role / Timing Role: Main system regulator delivering 1 A peak current with 340 mV dropout to maximize battery runtime. Use Value: Extends usable battery capacity by enabling regulation down to 2.14 V input (1.8 V + 340 mV), delaying system shutdown. | Use Scenario: Providing 1.8 V supply to ultra-low-power sensor interface ICs (e.g., ADS1220) in battery-operated wireless nodes. IC Role / Device Role / Timing Role: Low-quiescent-current (120 µA) LDO supporting sleep-mode current budgets <10 µA with EN-controlled shutdown. Use Value: Achieves >5-year battery life on CR2032 when paired with duty-cycled sensing and EN-driven power gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B182MR-G | 1 A max output, 1.8 V fixed, but only 250 mV dropout at 300 mA; PSRR 60 dB @ 1 kHz. | Limited to lower-current loads; less effective at rejecting high-frequency switching noise. | Preferred where ultra-low dropout at light loads is prioritized over full-load PSRR and thermal robustness. |
| ON Semiconductor NCP1117ST18T3G | 1 A max, 1.8 V fixed, but 1.2 V dropout at 1 A; requires ≥10 µF aluminum capacitor for stability. | Higher dropout limits usable input range; larger output capacitance increases board area and cost. | Suitable for cost-sensitive industrial controls where input voltage margin is ample and ceramic capacitor use is not required. |
Compared with XC6219B182MR-G and NCP1117ST18T3G, the MIC37101-1.8BM delivers superior full-load PSRR and ceramic-capacitor compatibility in a thermally enhanced SOIC-8EP package-critical for compact, high-density, and noise-sensitive digital systems.
Availability
MIC37101-1.8BM is available at Aetrix Electronics and suitable for FPGA core power, DSP supply rails, and portable embedded systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC37101-1.8BM 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 devices, FPGAs, and power management ICs, with emphasis on reliability, longevity, and industrial-grade qualification.
The MIC37101 series is designed for high-current, low-noise, fixed-output LDO applications in space-constrained and thermally demanding environments such as communications infrastructure and portable instrumentation.
FAQ
What is the maximum junction temperature specification for the MIC37101-1.8BM?
The MIC37101-1.8BM has a maximum rated junction temperature of +125°C. Thermal shutdown activates at approximately +150°C to protect the device, with automatic recovery once the die cools below +140°C. Derating curves in the official datasheet define safe operating current versus ambient temperature and PCB copper area for the SOIC-8EP package.
Does the MIC37101-1.8BM require an external feedback resistor network?
No, the MIC37101-1.8BM is a fixed-output LDO with internally trimmed 1.8 V regulation. The ADJ/SENSE pin is not accessible for external adjustment and must remain unconnected or tied to OUT per Microchip's layout guidelines. External resistors are unnecessary and would compromise accuracy and stability.
Can the MIC37101-1.8BM be used with a 1 µF ceramic output capacitor?
Yes, the MIC37101-1.8BM is explicitly characterized and stabilized with ceramic output capacitors ≥1 µF and ESR < 100 mΩ. This eliminates reliance on higher-ESR tantalum or aluminum electrolytic capacitors, improving reliability and reducing footprint-confirmed in the MIC37101-1.8BM datasheet Figure 7 and Table 3.
What is the enable logic polarity and threshold voltage for the MIC37101-1.8BM?
The MIC37101-1.8BM features an active-high enable input with a typical threshold of 1.2 V. When EN is pulled above 1.2 V (e.g., by a 1.8 V or 3.3 V GPIO), the regulator turns on; below 0.4 V, it enters ultra-low-quiescent shutdown mode (<1 µA). No external pull-up is required if driven directly by logic.
How does the MIC37101-1.8BM handle reverse current flow from the output to input?
The MIC37101-1.8BM includes reverse-current protection via its internal PNP pass transistor structure. When the output voltage exceeds the input (e.g., during input short or hot-swap events), the device blocks reverse current flow-preventing backfeeding and protecting upstream sources. This behavior is inherent and requires no external diode.
MIC37101-1.8BM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- 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
MIC37101-1.8BM FAQ
1.How can I place an order for MIC37101-1.8BM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37101-1.8BM 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 MIC37101-1.8BM reliable?
The price and inventory of MIC37101-1.8BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37101-1.8BM is usually 5 days.
3.What payment methods are accepted for MIC37101-1.8BM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37101-1.8BM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37101-1.8BM?
MIC37101-1.8BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37101-1.8BM 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 MIC37101-1.8BM?
For technical support, including MIC37101-1.8BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37101-1.8BM requirements.
6.How does Aetrix verify that MIC37101-1.8BM is sourced from the original manufacturer or authorized distributors?
All MIC37101-1.8BM 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 MIC37101-1.8BM meets industry standards.
7.What is the process for return or replacement of MIC37101-1.8BM?
All MIC37101-1.8BM units undergo pre-shipment inspection (PSI). If there is an issue with MIC37101-1.8BM, 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 MIC37101-1.8BM part is unused and in its original packaging.
Return procedure for MIC37101-1.8BM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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