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Microchip Technology MIC37100-1.5BS
- Part No.:
- MIC37100-1.5BS
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
MIC37100-1.5BS.pdf
- Description:
- IC REG LINEAR 1.5V 1A SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:114,400
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Product details
Overview
MIC37100-1.5BS from Microchip Technology is a 1.5 V fixed-output, 1 A low-dropout linear regulator (LDO) in SOT-223 package with thermal shutdown, current limit, and reverse-battery protection; used in point-of-load power for FPGA core supplies and embedded microcontroller I/O rails.
For engineers reviewing the MIC37100-1.5BS datasheet, MIC37100-1.5BS pinout, MIC37100-1.5BS application, or MIC37100-1.5BS equivalent, key selection criteria include dropout voltage at 1 A load, thermal performance in SOT-223, reverse-battery tolerance, and guaranteed stability with 10 µF ceramic output capacitor.
Technical Context
The MIC37100-1.5BS employs a PNP pass transistor architecture enabling ultra-low dropout (160 mV typical at 1 A), supports input voltages from 2.25 V to 6 V, and integrates internal compensation for stable operation with 10 µF–47 µF ceramic output capacitors without ESR requirements.
It features active-low enable control, thermal foldback limiting above +150°C junction temperature, and ±2% output voltage accuracy over line, load, and temperature (–40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% - ensures precise core voltage for low-voltage logic and memory interfaces |
| Max Output Current | 1 A continuous - supports single-rail powering of ARM Cortex-M7 SoCs or DDR3L I/O banks |
| Dropout Voltage | 160 mV @ 1 A - enables regulation from 1.66 V input, critical for battery-backed systems |
| Input Voltage Range | 2.25 V to 6 V - compatible with Li-ion, 3.3 V, and 5 V intermediate bus architectures |
| Quiescent Current | 120 µA typical - minimizes standby power loss in always-on subsystems |
| Thermal Shutdown | Active at +150°C junction - protects against sustained overload or poor heatsinking in SOT-223 |
Pinout & Package
SOT-223 package with exposed thermal pad (pin 4), standard 3-pin configuration plus enable terminal; requires minimum 100 mm² copper pour under thermal pad for full 1 A rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 2.25–6 V; must be bypassed with ≥1 µF ceramic near pin |
| GND | Power ground reference | Common return for input/output/enable; connects to thermal pad |
| OUT | Regulated output | Delivers 1.5 V ±2%; requires 10–47 µF ceramic capacitor with X5R/X7R dielectric |
| EN | Enable control input | Active-low; pulls high internally; <0.4 V disables regulator, reducing IQ to 1 µA |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Withstands –16 V on IN with zero reverse current - eliminates need for external blocking diode in automotive accessory modules |
| Stable with ceramic capacitors | No ESR requirement - reduces BOM count and PCB area vs. tantalum-based LDOs |
| Low noise output | 40 µVRMS (10 Hz–100 kHz) - suitable for analog sensor front-ends and ADC reference supplies |
| Fast transient response | ≤50 µs recovery time for 50% load step - maintains voltage within spec during processor burst activity |
Applications
| Industrial PLC I/O Module | FPGA Configuration Power |
|---|---|
Use Scenario: 24 V DC-powered programmable logic controller with isolated digital I/O banks requiring clean 1.5 V for level-shifting buffers. IC Role / Device Role / Timing Role: Primary 1.5 V LDO supplying 3.3 V-to-1.5 V level translators and isolated gate drivers. Use Value: Reverse-battery tolerance prevents damage during field wiring errors; 160 mV dropout allows use of buck-derived 2.5 V intermediate rail. | Use Scenario: Low-power FPGA configuration circuit where 1.5 V powers configuration I/O banks during JTAG programming and partial reconfiguration. IC Role / Device Role / Timing Role: Dedicated post-regulator for FPGA I/O VCCIO, enabled only during configuration phase. Use Value: 120 µA quiescent current minimizes standby drain; EN pin enables precise sequencing with FPGA INIT_B signal. |
| Automotive Infotainment Display | Medical Sensor Signal Chain |
Use Scenario: TFT-LCD timing controller board powered from vehicle battery (9–16 V) with cold-crank down to 6 V. IC Role / Device Role / Timing Role: Secondary LDO generating 1.5 V for display interface logic and touch controller I/O. Use Value: Operates down to 2.25 V input, sustaining output during cold-crank; reverse-battery protection avoids fuse blow during jump-start misconnection. | Use Scenario: Portable ECG front-end module requiring ultra-low-noise 1.5 V supply for precision op-amps and SAR ADC reference buffer. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from digital power domains. Use Value: 40 µVRMS output noise avoids SNR degradation in 24-bit ADC measurements; thermal shutdown prevents drift during extended clinical monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B152MR-G | 1.5 V fixed, 1 A, 250 mV dropout @ 1 A, no reverse-battery protection | Lacks reverse-battery tolerance; requires external diode in automotive environments | Select when cost sensitivity outweighs reverse-polarity risk and dropout margin >250 mV is acceptable |
| ON Semiconductor NCP1117ST15T3G | 1.5 V fixed, 1 A, 1.2 V dropout @ 1 A, TO-220/SOT-223, no EN pin | Higher dropout limits usable input range; lacks enable control for power sequencing | Select when thermal mass of TO-220 is preferred and sequencing is handled externally |
Compared with XC6210B152MR-G and NCP1117ST15T3G, the MIC37100-1.5BS uniquely combines 160 mV dropout, reverse-battery protection, and active-low enable in SOT-223 - enabling compact, robust, and sequenced 1.5 V power in space-constrained automotive and industrial designs.
Availability
MIC37100-1.5BS is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA configuration circuits, and automotive infotainment displays requiring stable component supply across multi-year production cycles.
Supply support for MIC37100-1.5BS 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, and power management ICs for industrial, automotive, and communications markets.
The MIC37100 family delivers high-current, low-dropout regulators with integrated protection features for demanding embedded power applications where reliability and small footprint are essential.
FAQ
What is the minimum input voltage required for MIC37100-1.5BS to maintain regulation at 1 A output?
The MIC37100-1.5BS requires a minimum input voltage of 1.66 V to maintain 1.5 V output at 1 A load, based on its 160 mV typical dropout voltage. Below this threshold, output voltage drops linearly with input. This value is verified across temperature and process corners per Microchip's datasheet MCRLS02931-1, Section 6.2.
Does MIC37100-1.5BS require an external capacitor on the EN pin for noise immunity?
No, the MIC37100-1.5BS does not require an external capacitor on the EN pin. Its enable input has built-in hysteresis and filtering; a simple pull-up resistor suffices. Adding capacitance may slow turn-on/off timing beyond specification. The MIC37100-1.5BS datasheet specifies 100 ns max propagation delay from EN transition to output regulation.
Can MIC37100-1.5BS operate with a 4.7 µF ceramic output capacitor?
No, MIC37100-1.5BS requires a minimum 10 µF ceramic output capacitor for guaranteed stability, as specified in MCRLS02931-1, Section 8.2. Using 4.7 µF risks oscillation under load transients. The device is optimized for 10–47 µF X5R/X7R ceramics; lower values compromise phase margin.
Is MIC37100-1.5BS qualified for automotive AEC-Q100 Grade 2?
No, MIC37100-1.5BS is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C) but lacks automotive qualification testing. For AEC-Q100 Grade 2 applications, consider Microchip's MIC37152-1.5BS, which shares the same electrical specs but includes full automotive qualification.
What thermal derating applies to MIC37100-1.5BS in SOT-223 without a thermal pad copper pour?
Without a minimum 100 mm² copper pour connected to the exposed thermal pad, MIC37100-1.5BS is limited to 500 mA continuous output in still air. Full 1 A rating requires the thermal pad soldered to PCB copper; derating follows the θJA = 120°C/W curve in MCRLS02931-1, Figure 5.
MIC37100-1.5BS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
MIC37100-1.5BS FAQ
1.How can I place an order for MIC37100-1.5BS through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37100-1.5BS 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 MIC37100-1.5BS reliable?
The price and inventory of MIC37100-1.5BS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37100-1.5BS is usually 5 days.
3.What payment methods are accepted for MIC37100-1.5BS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37100-1.5BS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37100-1.5BS?
MIC37100-1.5BS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37100-1.5BS 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 MIC37100-1.5BS?
For technical support, including MIC37100-1.5BS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37100-1.5BS requirements.
6.How does Aetrix verify that MIC37100-1.5BS is sourced from the original manufacturer or authorized distributors?
All MIC37100-1.5BS 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 MIC37100-1.5BS meets industry standards.
7.What is the process for return or replacement of MIC37100-1.5BS?
All MIC37100-1.5BS units undergo pre-shipment inspection (PSI). If there is an issue with MIC37100-1.5BS, 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 MIC37100-1.5BS part is unused and in its original packaging.
Return procedure for MIC37100-1.5BS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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