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Microchip Technology MCP1825S-0802E/AB
- Part No.:
- MCP1825S-0802E/AB
- Manufacturer:
- Microchip Technology
- Package:
- TO-220-3
- Datasheet:
-
MCP1825S-0802E/AB.pdf
- Description:
- IC REG LINEAR 0.8V 500MA TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:464
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Product details
Overview
MCP1825S-0802E/AB from Microchip Technology is a 3-pin fixed-output low-dropout (LDO) linear regulator delivering 500 mA output current at 0.8 V with 210 mV typical dropout voltage, ±0.5% output voltage tolerance, and stable operation using only 1.0 µF ceramic output capacitance. It serves as a primary power rail for sub-1.8 V logic in portable computing and networking backplane applications.
For engineers reviewing the MCP1825S-0802E/AB datasheet, MCP1825S-0802E/AB pinout, MCP1825S-0802E/AB application, or MCP1825S-0802E/AB equivalent, key selection criteria include its 0.8 V fixed output, TO-263-3 (DDPAK-3) thermal performance, shutdown-free 3-pin architecture, and compatibility with low-ESR ceramic capacitors in space-constrained designs.
Technical Context
The MCP1825S-0802E/AB uses a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR (60 dB at 100 Hz), with internal reference stability and overtemperature protection triggering at 150°C. Its fixed 0.8 V output eliminates external feedback components and simplifies layout versus adjustable variants.
No shutdown or power-good pins are present - the device operates continuously when powered within its 2.1 V to 6.0 V input range. Quiescent current remains stable at 120 µA typical across temperature and load, supporting battery-sensitive systems without enable control overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±0.5% - enables direct powering of core rails for modern low-voltage ASICs and FPGAs. |
| Max Output Current | 500 mA - sufficient for high-current digital loads including DDR I/O and processor cores. |
| Dropout Voltage | 210 mV typical at 500 mA - allows operation from single-cell Li-ion (3.0 V min) or 2.5 V system rails with margin. |
| Input Voltage Range | 2.1 V to 6.0 V - supports wide-input industrial and portable sources without external pre-regulation. |
| Quiescent Current | 120 µA typical - minimizes standby power loss in always-on subsystems. |
| Output Capacitor | Stable with ≥1.0 µF ceramic - reduces BOM count and PCB area vs. electrolytic solutions. |
| Thermal Shutdown | 150°C junction limit with 10°C hysteresis - provides fault-safe operation under sustained overload. |
Pinout & Package
Package: TO-263-3 (DDPAK-3) with exposed tab electrically connected to GND, offering θJA = 31.4°C/W on 4-layer board for efficient heat dissipation in high-power-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Unregulated Input Supply | Accepts 2.1–6.0 V input; requires local 1–10 µF ceramic decoupling for transient response. |
| 2 (GND) | Ground Reference & Thermal Pad | Low-current return path (120 µA); exposed tab must be soldered to large copper pour for thermal management. |
| 3 (VOUT) | Regulated 0.8 V Output | Delivers up to 500 mA; requires ≥1.0 µF ceramic capacitor placed adjacent to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Element | Enables 210 mV dropout at full 500 mA load, maximizing usable input voltage range. |
| 1.0 µF Ceramic Stability | Eliminates need for high-ESR tantalum or aluminum electrolytics, reducing cost and footprint. |
| ±0.5% Output Tolerance | Meets tight core voltage requirements for 0.8 V logic without post-regulation trimming. |
| 60 dB PSRR at 100 Hz | Suppresses ripple from upstream switching regulators, improving signal integrity in mixed-signal systems. |
| Overtemperature Protection | Shuts down output at 150°C junction temperature with 10°C hysteresis, preventing thermal runaway. |
Applications
| High-Speed Driver Chipset Power | Notebook Computer Core Rail |
|---|---|
Use Scenario: Powers PCIe SerDes and memory interface drivers requiring clean, low-noise 0.8 V supply. IC Role / Device Role / Timing Role: Primary LDO regulator supplying core voltage to high-speed transceivers. Use Value: 210 mV dropout enables use of 2.5 V intermediate bus; 120 µA quiescent current extends battery life during link idle states. | Use Scenario: Supplies CPU/GPU core voltage in thin-and-light notebooks where thermal headroom is limited. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 0.8 V to processor cores. Use Value: TO-263-3 package with exposed GND pad dissipates heat efficiently without heatsink; ±0.5% tolerance ensures compliance with Intel/AMD core voltage specs. |
| Networking Backplane Card | 2.5 V to 0.8 V Point-of-Load Regulator |
Use Scenario: Provides auxiliary 0.8 V rail for FPGA configuration logic and SERDES termination on telecom backplanes. IC Role / Device Role / Timing Role: Secondary LDO converting 2.5 V backplane supply to 0.8 V logic domain. Use Value: Stable with 1 µF ceramic capacitor simplifies layout in dense backplane routing; 500 mA capacity supports multi-function FPGA I/O banks. | Use Scenario: Replaces discrete DC-DC + LDO cascades in compact modules needing precise 0.8 V from 2.5 V input. IC Role / Device Role / Timing Role: Single-stage point-of-load regulator eliminating switching noise and filter complexity. Use Value: 60 dB PSRR at 100 Hz attenuates switching artifacts from upstream converters; fast load transient response maintains voltage during burst-mode operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1826S-0802E/AB | Same 0.8 V output, but rated for 1 A output current and higher thermal resistance (θJA = 42°C/W in SOT-223-3). | Used where higher current headroom or different package footprint is required; not pin-compatible due to different thermal pad layout. | Select when >500 mA peak load or SOT-223-3 mounting is preferred. |
| Torex XC6206P082MR-G | 0.8 V fixed output, 300 mA rating, 250 mV dropout at 300 mA, SOT-23-3 package. | Lower current capability and smaller package; lacks thermal pad, limiting power handling in continuous operation. | Choose for space-constrained, lower-current applications where TO-263-3 thermal mass is unnecessary. |
Compared with MCP1825S-0802E/AB, the MCP1826S-0802E/AB offers higher current capacity but reduced thermal efficiency in the same package family, while the XC6206P082MR-G trades current and thermal performance for ultra-small size - making MCP1825S-0802E/AB optimal for 500 mA, thermally demanding 0.8 V point-of-load regulation.
Availability
MCP1825S-0802E/AB is available at Aetrix Electronics and suitable for notebook computers, networking backplane cards, and high-speed driver chipset power applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MCP1825S-0802E/AB 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 leading provider of microcontroller, analog, and FPGA solutions, with deep expertise in power management ICs for embedded and industrial markets.
The MCP1825/MCP1825S product line was designed specifically for high-current, low-voltage LDO applications in portable and networking equipment where dropout, quiescent current, and ceramic capacitor compatibility are critical.
FAQ
What is the maximum input voltage rating for MCP1825S-0802E/AB?
The absolute maximum input voltage for MCP1825S-0802E/AB is 6.5 V, but the recommended operating range is 2.1 V to 6.0 V per the datasheet. Exceeding 6.0 V may compromise long-term reliability even if within absolute ratings, and operation below 2.1 V prevents regulation at 0.8 V output due to dropout constraints. Always maintain VIN ≥ VOUT + VDROPOUT (≥ 1.01 V minimum).
Does MCP1825S-0802E/AB include a shutdown pin or power-good output?
No, MCP1825S-0802E/AB is a 3-pin fixed-output variant and does not include SHDN or PWRGD functionality. These features are exclusive to the 5-pin MCP1825 family. The MCP1825S-0802E/AB operates continuously when powered within its input range - enabling simpler, lower-cost designs where enable control or power sequencing is handled externally.
Can MCP1825S-0802E/AB be used with tantalum or aluminum-electrolytic output capacitors?
Yes, MCP1825S-0802E/AB is stable with tantalum and aluminum-electrolytic capacitors, provided ESR ≤ 1 Ω. However, ceramic capacitors (X7R/X5R, ≥1.0 µF) are strongly recommended due to lower ESR, smaller footprint, better temperature stability, and longer lifetime - especially in portable applications where reliability and size matter.
What is the thermal resistance (θJA) of MCP1825S-0802E/AB in its TO-263-3 package?
The junction-to-ambient thermal resistance (θJA) for MCP1825S-0802E/AB in TO-263-3 (DDPAK-3) is 31.4°C/W when mounted on a 4-layer JEDEC-standard board. This value assumes proper soldering of the exposed thermal pad to a large internal ground plane - inadequate thermal land area or insufficient via count will degrade actual thermal performance.
Is MCP1825S-0802E/AB compatible with 1.0 µF ceramic output capacitors across temperature and load?
Yes, MCP1825S-0802E/AB is explicitly characterized and guaranteed stable with ≥1.0 µF X7R or X5R ceramic capacitors across –40°C to +125°C junction temperature and 0–500 mA load range. This eliminates the need for external compensation and simplifies design validation compared to LDOs requiring minimum ESR or larger capacitance.
MCP1825S-0802E/AB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 220 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
MCP1825S-0802E/AB FAQ
1.How can I place an order for MCP1825S-0802E/AB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1825S-0802E/AB 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 MCP1825S-0802E/AB reliable?
The price and inventory of MCP1825S-0802E/AB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1825S-0802E/AB is usually 5 days.
3.What payment methods are accepted for MCP1825S-0802E/AB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1825S-0802E/AB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1825S-0802E/AB?
MCP1825S-0802E/AB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1825S-0802E/AB 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 MCP1825S-0802E/AB?
For technical support, including MCP1825S-0802E/AB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1825S-0802E/AB requirements.
6.How does Aetrix verify that MCP1825S-0802E/AB is sourced from the original manufacturer or authorized distributors?
All MCP1825S-0802E/AB 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 MCP1825S-0802E/AB meets industry standards.
7.What is the process for return or replacement of MCP1825S-0802E/AB?
All MCP1825S-0802E/AB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1825S-0802E/AB, 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 MCP1825S-0802E/AB part is unused and in its original packaging.
Return procedure for MCP1825S-0802E/AB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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