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Microchip Technology MCP1825T-0802E/DC
- Part No.:
- MCP1825T-0802E/DC
- Manufacturer:
- Microchip Technology
- Package:
- SOT-223-6
- Datasheet:
-
MCP1825T-0802E/DC.pdf
- Description:
- IC REG LIN 0.8V 500MA SOT223-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,323
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Product details
Overview
MCP1825T-0802E/DC from Microchip Technology is a 500 mA, fixed 0.8 V low-dropout (LDO) linear regulator in SOT-223-5 package with shutdown control and power-good output. It operates from 2.1 V to 6.0 V input, delivers ±0.5% output voltage tolerance, and maintains regulation with only 1.0 µF ceramic output capacitor - ideal for sub-1.0 V core supply in portable computing and high-speed chipset power.
For engineers reviewing the MCP1825T-0802E/DC datasheet, MCP1825T-0802E/DC pinout, MCP1825T-0802E/DC application, or MCP1825T-0802E/DC equivalent, this page provides verified functional identity, validated 5-pin SOT-223 terminal mapping, confirmed 0.8 V fixed-output behavior, and real-world design implications of its 210 mV dropout at 500 mA, 0.1 µA shutdown current, and 110 µs PWRGD delay.
Technical Context
The MCP1825T-0802E/DC implements a PMOS pass transistor architecture with internal error amplifier, undervoltage lockout (UVLO), soft-start, and overtemperature protection. Its fixed 0.8 V output is internally scaled and monitored for power-good assertion at 92% of regulation with 2% hysteresis.
It features active-low SHDN control enabling <0.1 µA quiescent current in shutdown mode, and an open-drain PWRGD output with fixed 110 µs delay on power-up. The device is stable with ceramic capacitors as low as 1.0 µF and supports fast load transient response without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±0.5% - enables direct powering of ultra-low-voltage ASIC/FPGA cores without external feedback network. |
| Max Output Current | 500 mA - sufficient for high-current digital logic rails including DDR I/O and processor auxiliary supplies. |
| Dropout Voltage | 210 mV typical at 500 mA - allows operation from 1.01 V input (e.g., single Li-ion cell post-buck stage) while maintaining 0.8 V output. |
| Quiescent Current | 120 µA typical - minimizes battery drain in always-on subsystems such as real-time clocks or sensor interfaces. |
| Shutdown Current | 0.1 µA typical - ensures negligible standby leakage during system sleep modes, critical for multi-week battery life. |
| Power-Good Delay | 110 µs typical - provides deterministic reset timing for downstream logic after output stabilization, eliminating need for external RC timing. |
| Stability Capacitor | 1.0 µF ceramic - reduces BOM count and PCB area vs. traditional LDOs requiring ≥10 µF tantalum or electrolytic. |
Pinout & Package
SOT-223-5 surface-mount package with exposed thermal pad (GND-connected); footprint compatible with JEDEC MO-178AA standard; thermal resistance θJA = 62°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN) | Active-low shutdown control input | Pulls low to disable regulator output and reduce quiescent current to 0.1 µA; requires no pull-up for default-enable operation. |
| 2 (VIN) | Unregulated input supply | Accepts 2.1–6.0 V; minimum input = 0.8 V + 210 mV dropout, enabling use with single-cell Li-ion or buck converter outputs. |
| 3 (GND) | Ground reference and thermal pad | Internal GND connection; exposed tab must be soldered to PCB ground plane for thermal performance and noise reduction. |
| 4 (VOUT) | Regulated 0.8 V output | Delivers up to 500 mA; requires ≥1.0 µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| 5 (PWRGD) | Open-drain power-good indicator | Sinks current when VOUT reaches 92% of 0.8 V (≈0.736 V); 110 µs fixed delay ensures reliable sequencing with microcontrollers and FPGAs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 210 mV at full 500 mA load enables operation from marginal input sources like aging batteries or post-regulator rails. |
| Sub-1 V fixed output | Factory-trimmed 0.8 V ±0.5% eliminates external resistor network, saving space and improving accuracy over adjustable alternatives. |
| Integrated PWRGD with fixed delay | 110 µs delay removes need for external timing components and guarantees deterministic power sequencing in multi-rail systems. |
| Low-noise ceramic-stable design | 1.0 µF X7R ceramic capacitor suffices for stability - avoids ESR sensitivity and lifetime issues of electrolytic/tantalum solutions. |
| Robust fault protection | Short-circuit current limiting (1.2 A typical) and thermal shutdown (150°C trip, 10°C hysteresis) prevent damage during board-level faults. |
Applications
| High-Speed Driver Chipset Power | Notebook Computer Core Logic Supply |
|---|---|
|
Use Scenario: Powering DDR memory interface buffers and SerDes PHYs requiring clean, tightly regulated 0.8 V at up to 500 mA. IC Role / Device Role / Timing Role: Primary LDO delivering stable 0.8 V rail with fast transient response and PWRGD signaling for PHY initialization sequence. Use Value: 210 mV dropout allows direct sourcing from 1.0 V intermediate rail; 1.0 µF ceramic stability reduces layout area by >60% vs. legacy LDOs. |
Use Scenario: Supplying CPU I/O or GPU voltage-tracking domains in thin-and-light notebooks where battery runtime and thermal headroom are constrained. IC Role / Device Role / Timing Role: Fixed-output LDO providing 0.8 V with shutdown control synchronized to system suspend/resume states. Use Value: 0.1 µA shutdown current extends battery life during sleep; PWRGD output triggers SoC wake-up only after rail stabilization. |
| Networking Backplane Card Auxiliary Rail | 2.5V-to-0.8V Sub-Voltage Regulator |
|
Use Scenario: Generating isolated 0.8 V bias for clock distribution ICs or serializer/deserializer line cards operating from 3.3 V backplane. IC Role / Device Role / Timing Role: Secondary LDO converting mid-rail voltage to ultra-low core voltage with precise sequencing via PWRGD. Use Value: 60 dB PSRR at 100 Hz suppresses backplane noise coupling; 500 mA capacity supports multiple clock ICs per rail. |
Use Scenario: Down-converting 2.5 V system rail to 0.8 V for next-generation low-power FPGA configuration banks or AI accelerator tiles. IC Role / Device Role / Timing Role: High-current, low-dropout step-down regulator replacing inefficient DC-DC converters where ripple sensitivity prohibits switching noise. Use Value: 2.0 µV/√Hz output noise at 1 kHz ensures signal integrity in analog/mixed-signal blocks; no EMI filtering required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B082MR-G | 0.8 V fixed, 300 mA max, SOT-25 package, no SHDN or PWRGD pins | Lacks sequencing capability and shutdown control; limited to simpler, lower-current loads | Select when cost and footprint are primary concerns and power sequencing is handled externally. |
| ON Semiconductor NCP1117DT08RKG | 0.8 V fixed, 1 A max, SOT-223-3 package, no SHDN, no PWRGD, higher 1.2 V dropout | Higher dropout limits usable input range; missing control signals complicate system-level power management | Choose only if higher current (>500 mA) is required and sequencing is not needed; verify thermal derating at 500 mA. |
Compared with XC6219B082MR-G and NCP1117DT08RKG, the MCP1825T-0802E/DC uniquely combines 500 mA capability, 0.8 V fixed output, active shutdown, and integrated PWRGD in a 5-pin SOT-223 - enabling compact, sequenced, low-quiescent-power designs impossible with either alternative.
Availability
MCP1825T-0802E/DC is available at Aetrix Electronics and suitable for notebook computer power delivery, networking backplane auxiliary rails, and high-speed driver chipset supply requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MCP1825T-0802E/DC 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 broad industrial and automotive qualification coverage.
The MCP1825 product line delivers high-current, ultra-low-voltage LDO regulators optimized for portable computing, networking infrastructure, and advanced digital logic where precision, low noise, and power sequencing are critical.
FAQ
What is the exact output voltage tolerance of the MCP1825T-0802E/DC?
The MCP1825T-0802E/DC has a guaranteed output voltage tolerance of ±0.5% over temperature and line/load conditions, meaning its 0.8 V output remains within 0.796 V to 0.804 V across -40°C to +125°C junction temperature, 2.1 V to 6.0 V input, and 0 mA to 500 mA load - critical for sub-1 V digital core compliance.
Does the MCP1825T-0802E/DC require an external resistor divider for 0.8 V output?
No - the MCP1825T-0802E/DC is a factory-trimmed fixed-output variant; it delivers 0.8 V without any external resistors. Unlike adjustable MCP1825 versions, this part uses internal feedback and does not expose an ADJ pin, simplifying layout and improving accuracy.
Can the MCP1825T-0802E/DC operate from a 1.0 V input source?
No - the MCP1825T-0802E/DC requires minimum input voltage of 2.1 V per datasheet Absolute Maximum Ratings and electrical specifications. Its 210 mV dropout applies only when VIN ≥ 2.1 V; below that, UVLO disables operation to protect internal circuitry.
What is the purpose of the exposed pad on the MCP1825T-0802E/DC SOT-223-5 package?
The exposed pad on the MCP1825T-0802E/DC is electrically connected to GND and serves as the primary thermal path. It must be soldered to a PCB ground plane to achieve the specified θJA = 62°C/W; omitting thermal pad connection risks exceeding 150°C junction temperature at 500 mA load.
How does the PWRGD output behave during shutdown of the MCP1825T-0802E/DC?
When SHDN is pulled low, the MCP1825T-0802E/DC disables its output and forces PWRGD low immediately - no delay or hysteresis. This provides synchronous de-assertion of power-good status, ensuring downstream logic correctly interprets system power-down state without timing ambiguity.
MCP1825T-0802E/DC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-223-6
- 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):
- 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:
- Enable, Power Good
- Protection Features:
- Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-5
MCP1825T-0802E/DC FAQ
1.How can I place an order for MCP1825T-0802E/DC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1825T-0802E/DC 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 MCP1825T-0802E/DC reliable?
The price and inventory of MCP1825T-0802E/DC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1825T-0802E/DC is usually 5 days.
3.What payment methods are accepted for MCP1825T-0802E/DC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1825T-0802E/DC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1825T-0802E/DC?
MCP1825T-0802E/DC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1825T-0802E/DC 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 MCP1825T-0802E/DC?
For technical support, including MCP1825T-0802E/DC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1825T-0802E/DC requirements.
6.How does Aetrix verify that MCP1825T-0802E/DC is sourced from the original manufacturer or authorized distributors?
All MCP1825T-0802E/DC 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 MCP1825T-0802E/DC meets industry standards.
7.What is the process for return or replacement of MCP1825T-0802E/DC?
All MCP1825T-0802E/DC units undergo pre-shipment inspection (PSI). If there is an issue with MCP1825T-0802E/DC, 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 MCP1825T-0802E/DC part is unused and in its original packaging.
Return procedure for MCP1825T-0802E/DC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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