My Inquiry
My Account
Microchip Technology MIC37301-2.5WR-TR
- Part No.:
- MIC37301-2.5WR-TR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-5 (5 Leads + Tab)
- Datasheet:
-
MIC37301-2.5WR-TR.pdf
- Description:
- IC REG LDO 2.5V 3A SPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:650
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC37301-2.5WR-TR from Microchip Technology is a 3.0A fixed-output low-dropout linear regulator delivering 2.5V with ±1.0% initial accuracy, 500 mV max dropout at 3A over temperature, and operation from 2.25V to 6.0V input. It features enable control, open-collector error flag, thermal shutdown, current limiting, and reverse-leakage protection-designed for post-regulation in high-current digital logic supplies.
For engineers reviewing the MIC37301-2.5WR-TR datasheet, MIC37301-2.5WR-TR pinout, MIC37301-2.5WR-TR application, or MIC37301-2.5WR-TR equivalent, key selection criteria include dropout performance at full load, flag threshold accuracy (93% of VOUT), thermal resistance (θJC = 16°C/W for ePad SOIC-8), ceramic capacitor stability (≥47 µF), and enable logic compatibility (2.25V VIH min).
Technical Context
The MIC37301-2.5WR-TR uses a Super Beta PNP pass transistor architecture enabling ultra-low dropout voltage (≤500 mV at 3A) while maintaining stable regulation across –40°C to +125°C junction temperature. Its internal reference is trimmed to ±1.0% initial output tolerance and exhibits ≤1% total output variation over line, load, and temperature.
It integrates dual fault-monitoring functions: an enable input with TTL/CMOS-compatible thresholds (VIH ≥ 2.25V, VIL ≤ 0.8V) and an open-drain FLG output that asserts low when output falls >5% below nominal (93% VOUT threshold with 2% hysteresis), sinking up to 10 mA during fault.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.0% initial accuracy; ensures stable core supply for 2.5V logic families without external feedback. |
| Max Dropout Voltage | 500 mV at 3.0A and full temperature range; enables 2.5V output from as low as 3.0V input, critical for battery-powered systems. |
| Input Voltage Range | 2.25V to 6.0V; supports direct connection to Li-ion, USB, or SMPS outputs without pre-regulation. |
| Output Current | 3.0A continuous; sufficient for powering multi-core microcontrollers, FPGAs, or ASICs requiring low-noise DC rails. |
| Ground Current | 40 mA typical at 3A load; low quiescent current preserves efficiency in high-current linear regulation. |
| Flag Threshold | 93% of nominal VOUT (2.325V for 2.5V device) with 2% hysteresis; provides reliable undervoltage detection without chatter during transients. |
| Enable Threshold | VIH ≥ 2.25V, VIL ≤ 0.8V; compatible with 3.3V and 2.5V logic families for clean system power sequencing. |
Pinout & Package
Package: ePad SOIC-8 (ME), thermally enhanced with exposed pad connected to GND for optimal heat dissipation (θJC = 16°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable input | CMOS-compatible control: high ≥2.25V enables regulator; low ≤0.8V shuts down output and reduces IGNDSHDN to ≤5 µA. |
| 2 (VIN) | Input supply | Primary power input (2.25–6.0V); requires ≥1 µF bypass capacitor placed within 1 inch for ripple rejection. |
| 3 (GND) | Ground reference | Power ground return; TAB (exposed pad) is electrically tied to this pin for thermal and electrical integrity. |
| 4,5,6,7 (VOUT) | Regulated output | High-current 2.5V output; pins 4–7 are internally paralleled to reduce trace resistance and improve current sharing. |
| 8 (FLG) | Error flag output | Open-collector output active low when VOUT < 2.325V; requires external pull-up for system monitoring or fault latching. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 500 mV max at 3A over temperature enables efficient 3.0V→2.5V conversion without entering dropout under worst-case conditions. |
| Ceramic capacitor stability | Stable with ≥47 µF X7R/X5R ceramic output capacitors-eliminates need for bulk tantalum and simplifies BOM. |
| Integrated fault signaling | Open-drain FLG pin with precise 93% VOUT threshold and 2% hysteresis allows deterministic system-level undervoltage response. |
| Thermal robustness | Junction temperature range –40°C to +125°C with internal thermal shutdown prevents damage during sustained overload or poor heatsinking. |
| Reverse leakage protection | Prevents backflow from VOUT to VIN when input is removed-critical for systems with multiple power domains or hot-swap capability. |
Applications
| PC Add-In Card Power | SMPS Post Regulator |
|---|---|
Use Scenario: Powering PCIe-based FPGA accelerators or GPU companion chips on expansion cards where board space limits switching regulator use. IC Role / Device Role / Timing Role: Primary 2.5V LDO delivering clean, low-noise power to high-speed I/O banks and configuration logic. Use Value: 500 mV dropout allows direct use of 3.3V rail as input, eliminating intermediate conversion stages and reducing component count. | Use Scenario: Tight-regulation stage after a 5V or 3.3V buck converter supplying memory interfaces or analog subsystems sensitive to ripple. IC Role / Device Role / Timing Role: Final-stage linear regulator providing ultra-low noise and fast transient response for timing-critical circuits. Use Value: 47 µF ceramic capacitor support and excellent load transient response (Fig 2-25) maintain <1% output deviation during 1A step loads. |
| Battery-Powered MCU Supply | Multimedia Processor Core Rail |
Use Scenario: Core voltage supply for ARM Cortex-M7 or RISC-V SoCs in portable instrumentation where battery life and thermal constraints are critical. IC Role / Device Role / Timing Role: Main 2.5V domain regulator enabling dynamic voltage scaling and low-power sleep modes. Use Value: 40 mA ground current at 3A load and <5 µA shutdown current extend runtime in deep-sleep states. | Use Scenario: Dedicated 2.5V rail for video codec engines or DSP cores in set-top boxes or smart displays requiring burst-mode current delivery. IC Role / Device Role / Timing Role: High-current, low-noise LDO supporting peak currents up to 3A during encode/decode operations. Use Value: Parallel VOUT pins (pins 4–7) reduce effective output impedance, minimizing IR drop and improving voltage regulation under dynamic load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC37301-2.5YM-TR | Same die, identical specs, but in SOIC-8 (non-ePad) package with θJC = 35°C/W (vs. 16°C/W for ePad). | Lower thermal performance limits max continuous current in high-ambient environments without heatsinking. | Select MIC37301-2.5WR-TR when PCB layout allows ePad grounding and thermal management demands ≤16°C/W θJC. |
| TSP50025DR | 2.5V, 3A LDO with 600 mV dropout (vs. 500 mV), no flag output, and 2.5% output tolerance (vs. ±1.0%). | Lacks fault signaling and tighter accuracy; suitable only where system-level monitoring replaces FLG functionality. | Choose MIC37301-2.5WR-TR when precise undervoltage detection, thermal margin, or production-grade accuracy is required. |
Compared with MIC37301-2.5YM-TR, the MIC37301-2.5WR-TR delivers superior thermal performance via its ePad SOIC-8 package, enabling higher sustained current in compact layouts; versus TSP50025DR, it provides tighter regulation, integrated fault flagging, and lower dropout-making it preferable for mission-critical digital power domains.
Availability
MIC37301-2.5WR-TR is available at Aetrix Electronics and suitable for PC add-in card power, SMPS post-regulation, and battery-powered MCU supply applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MIC37301-2.5WR-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 is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with global design, manufacturing, and support infrastructure.
The MIC37300/01/02/03 family was designed specifically for high-current, low-voltage linear regulation in space-constrained digital systems-emphasizing ultra-low dropout, ceramic capacitor compatibility, and integrated protection features.
FAQ
What is the maximum continuous output current for MIC37301-2.5WR-TR?
The MIC37301-2.5WR-TR is rated for 3.0A continuous output current under specified thermal conditions. This rating assumes proper PCB layout with the ePad thermally connected to a large copper area, ambient temperature ≤+85°C, and input-to-output differential ≤1.0V. At full load and 125°C junction temperature, dropout remains ≤500 mV per datasheet DS20006169A, page 4.
Does MIC37301-2.5WR-TR require an external resistor network to set output voltage?
No, MIC37301-2.5WR-TR is a fixed-output device delivering 2.5V without external components. Unlike adjustable variants (MIC37302/MIC37303), it contains internal feedback resistors trimmed to ±1.0% accuracy. No ADJ pin or external divider is present-pin 5 is not used and must remain unconnected.
How does the FLG pin on MIC37301-2.5WR-TR behave during thermal shutdown?
The FLG pin on MIC37301-2.5WR-TR is inoperative during thermal shutdown per datasheet Section 4.6. It only asserts low when output voltage drops below 93% of nominal (2.325V) due to overcurrent, low input, or excessive load-conditions occurring before thermal shutdown activates. Once thermal shutdown engages, FLG is disabled and floats high-impedance.
Can MIC37301-2.5WR-TR operate stably with a 22 µF ceramic output capacitor?
No-MIC37301-2.5WR-TR requires ≥47 µF ceramic output capacitance for guaranteed stability per datasheet Section 4.2. With 22 µF, the ESR must be 200 mΩ to 2 Ω, but ceramic capacitors of that value typically have ESR <10 mΩ, risking oscillation. Use ≥47 µF X7R/X5R ceramic or add series resistance to meet ESR requirements if smaller capacitance is mandatory.
What is the purpose of the exposed pad on the MIC37301-2.5WR-TR SOIC-8 package?
The exposed pad (EP) on MIC37301-2.5WR-TR is electrically and thermally connected to GND. It must be soldered to a PCB copper pour to achieve the specified θJC = 16°C/W thermal resistance. Leaving it unconnected degrades thermal performance by >2× and risks exceeding 125°C junction temperature under 3A load.
MIC37301-2.5WR-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SPAK-5 (5 Leads + Tab)
- 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-SPAK
MIC37301-2.5WR-TR FAQ
1.How can I place an order for MIC37301-2.5WR-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37301-2.5WR-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 MIC37301-2.5WR-TR reliable?
The price and inventory of MIC37301-2.5WR-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37301-2.5WR-TR is usually 5 days.
3.What payment methods are accepted for MIC37301-2.5WR-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37301-2.5WR-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37301-2.5WR-TR?
MIC37301-2.5WR-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37301-2.5WR-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 MIC37301-2.5WR-TR?
For technical support, including MIC37301-2.5WR-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37301-2.5WR-TR requirements.
6.How does Aetrix verify that MIC37301-2.5WR-TR is sourced from the original manufacturer or authorized distributors?
All MIC37301-2.5WR-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 MIC37301-2.5WR-TR meets industry standards.
7.What is the process for return or replacement of MIC37301-2.5WR-TR?
All MIC37301-2.5WR-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37301-2.5WR-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 MIC37301-2.5WR-TR part is unused and in its original packaging.
Return procedure for MIC37301-2.5WR-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC37301-2.5WR-TR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
