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Microchip Technology MCP1827T-1802E/ET
- Part No.:
- MCP1827T-1802E/ET
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MCP1827T-1802E/ET.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A 5DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:545
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Product details
Overview
MCP1827T-1802E/ET from Microchip Technology is a 1.5A, fixed-output 1.8V low-dropout (LDO) linear regulator in a 5-lead DDPAK package with shutdown control and power-good indication. It operates from 2.3V to 6.0V input, delivers ±0.5% output voltage tolerance at 1.5A, features 330 mV typical dropout, and supports stable regulation with only 1.0 µF ceramic output capacitance - optimized for high-current, low-voltage rail generation in portable computing and networking backplanes.
For engineers reviewing the MCP1827T-1802E/ET datasheet, MCP1827T-1802E/ET pinout, MCP1827T-1802E/ET application, or MCP1827T-1802E/ET equivalent, key selection criteria include its 1.8V fixed output, 200 µs PWRGD delay, SHDN-enabled ultra-low 0.1 µA shutdown current, thermal shutdown at 150°C, and compatibility with compact ceramic output capacitors.
Technical Context
The MCP1827T-1802E/ET implements a PMOS pass transistor architecture with internal voltage reference, error amplifier, and soft-start circuitry. Its fixed 1.8V output is internally trimmed and monitored via a dedicated PWRGD comparator that asserts after a fixed 200 µs delay when VOUT reaches ≥92% of nominal regulation.
Shutdown is active-low on the SHDN pin, reducing quiescent current to 0.1 µA while forcing PWRGD low. Overtemperature protection triggers at 150°C with 10°C hysteresis, and short-circuit current limiting caps output at 2.2A (typical) under hard fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±0.5% over -40°C to +125°C junction temperature - ensures stable core logic supply for 1.8V I/O and processor rails. |
| Max Output Current | 1.5A continuous - supports high-current digital loads such as DDR memory termination or FPGA I/O banks without external boost stages. |
| Dropout Voltage | 330 mV typical at 1.5A - enables operation from single-cell Li-ion (3.0V min) or dual-cell NiMH (2.4V min) with margin for battery aging. |
| Quiescent Current | 120 µA typical (active), 0.1 µA typical (SHDN) - extends battery runtime in always-on subsystems like real-time clocks or wake-on-LAN controllers. |
| PWRGD Delay | 200 µs typical rising-edge delay - provides deterministic power sequencing timing for downstream logic or FPGAs requiring regulated voltage validation before enable. |
| Stability Capacitor | 1.0 µF ceramic (X7R/X5R) minimum - eliminates need for bulky tantalum or electrolytic capacitors, reducing PCB area and cost. |
| Thermal Protection | 150°C shutdown with 10°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking in enclosed enclosures. |
Pinout & Package
Package: 5-Lead Plastic DDPAK (exposed tab grounded). Thermal resistance θJA = 31.2°C/W on 4-layer JC51 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 ≥45% VIN for logic-high recognition. |
| 2: VIN | Unregulated input supply | Accepts 2.3V–6.0V; requires ≥1 µF local ceramic decoupling for stability under fast load transients. |
| 3: GND | Ground reference and thermal path | Connected to exposed tab (EP); must be tied to low-impedance ground plane to ensure PSRR and thermal performance. |
| 4: VOUT | Regulated 1.8V output | Delivers up to 1.5A; requires ≥1.0 µF ceramic capacitor placed adjacent to pin for loop stability and noise suppression. |
| 5: PWRGD | Open-drain power-good indicator | Sinks current when VOUT ≥92% of 1.8V; requires external pull-up to system rail (e.g., 3.3V) for logic-level signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 330 mV at 1.5A enables efficient regulation from low-input sources like partially discharged batteries. |
| Ultra-low shutdown current | 0.1 µA typical allows multi-year battery life in maintenance-free IoT sensor nodes or backup power circuits. |
| Integrated power-good monitoring | Fixed 200 µs delay and 92% threshold provide reliable, no-component power sequencing for complex SoCs. |
| Ceramic-capacitor stability | Stable with 1.0 µF X7R/X5R ceramics - eliminates ESR dependency, reduces BOM count, and improves reliability vs. electrolytics. |
| Robust fault protection | Combined short-circuit current limiting (2.2A typ) and thermal shutdown (150°C) prevent catastrophic failure under abnormal conditions. |
Applications
| High-Speed Driver Chipset Power | Networking Backplane Cards |
|---|---|
Use Scenario: Supplying 1.8V core power to PCIe switch controllers and SerDes PHYs on enterprise backplanes. IC Role / Device Role / Timing Role: Primary LDO delivering clean, sequenced 1.8V rail with PWRGD confirmation before link training begins. Use Value: 330 mV dropout preserves headroom across wide input range (3.3V–5.0V backplane rails), while 1.5A capacity handles burst currents during packet forwarding. |
Use Scenario: Generating 1.8V I/O supply for multi-gigabit Ethernet MAC/PHY interfaces on line cards. IC Role / Device Role / Timing Role: Fixed-output LDO providing low-noise, thermally robust 1.8V rail with integrated PWRGD for FPGA configuration sequencing. Use Value: 120 µA quiescent current minimizes standby loss; ceramic capacitor compatibility simplifies layout in dense backplane routing environments. |
| Notebook Computers | Network Interface Cards |
Use Scenario: Powering 1.8V DDR3/DDR4 memory termination and I/O buffers in ultrabook mainboards. IC Role / Device Role / Timing Role: Secondary LDO supplying memory subsystem with precise 1.8V and fast transient response to dynamic load steps. Use Value: Fast load transient recovery and ±0.5% tolerance ensure signal integrity margins are maintained during memory access bursts. |
Use Scenario: Delivering 1.8V supply to 10/100/1000BASE-T PHYs and management microcontrollers on PCIe NICs. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO enabling fanless NIC designs with guaranteed startup sequencing via PWRGD. Use Value: DDPAK package with exposed tab dissipates heat without heatsink; 200 µs PWRGD delay aligns with NIC firmware initialization windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | 200 mA max output, 1.1V–6.8V adjustable, 310 mV dropout at 150 mA, no PWRGD or SHDN | Lacks power-good signaling and shutdown control; insufficient current for 1.5A loads | Select only for low-current, non-sequenced analog bias rails where precision (0.1% tolerance) outweighs current capability. |
| MCP1755ST-1802E/MB | 500 mA max output, same 1.8V fixed output, 350 mV dropout at 500 mA, no PWRGD, SHDN present | Lower current rating and missing PWRGD limit use in systems requiring fault-aware power sequencing | Use only in space-constrained, low-power peripherals (e.g., sensors, LEDs) where 1.5A headroom is unnecessary. |
Compared with TPS7A4700RGWR and MCP1755ST-1802E/MB, the MCP1827T-1802E/ET uniquely combines 1.5A output, integrated PWRGD with fixed delay, and sub-µA shutdown - making it the sole option among the three for high-current, sequenced 1.8V digital rail generation.
Availability
MCP1827T-1802E/ET is available at Aetrix Electronics and suitable for notebook computers, networking backplane cards, and network interface cards requiring stable component supply with full lifecycle support and traceable sourcing.
Supply support for MCP1827T-1802E/ET 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 Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability semiconductor products.
The MCP1827 series is designed specifically for high-current, low-voltage LDO applications in portable and infrastructure equipment - emphasizing low dropout, ultra-low quiescent current, and integrated power sequencing features.
FAQ
What is the maximum input voltage rating for the MCP1827T-1802E/ET?
The MCP1827T-1802E/ET has an absolute maximum input voltage rating of 6.5V. Its operational input range is specified from 2.3V to 6.0V. Exceeding 6.5V may cause permanent damage. For reliable long-term operation, VIN should remain within the 2.3V–6.0V range per the DS22001D datasheet, with sufficient margin above dropout voltage at full load.
Does the MCP1827T-1802E/ET require an external resistor divider for 1.8V output?
No. The MCP1827T-1802E/ET is a fixed-output variant - its 1.8V regulation is achieved via internal trimming, not an external ADJ pin network. Unlike adjustable MCP1827 versions, this part has no ADJ pin; pin 5 is PWRGD. Therefore, no external resistors are needed, simplifying design and reducing BOM count.
How does the PWRGD output behave during startup and shutdown of the MCP1827T-1802E/ET?
During startup, PWRGD remains low until VOUT reaches ≥92% of 1.8V (≥1.656V), then asserts high after a fixed 200 µs delay. During shutdown (SHDN pulled low), PWRGD is actively driven low within microseconds. The open-drain output requires an external pull-up resistor to a valid logic rail (e.g., 3.3V) to generate a clean digital signal for host processors or FPGAs.
Can the MCP1827T-1802E/ET operate stably with a 1.0 µF ceramic output capacitor?
Yes. The MCP1827T-1802E/ET is explicitly characterized and guaranteed stable with a minimum 1.0 µF X7R or X5R ceramic capacitor on VOUT. This eliminates ESR dependency and enables compact, high-reliability designs. Larger values (up to 22 µF) improve PSRR and transient response but are not required for basic stability.
What thermal performance can be expected from the MCP1827T-1802E/ET in a 5-lead DDPAK package?
In a standard 4-layer JC51 PCB layout, the MCP1827T-1802E/ET exhibits a junction-to-ambient thermal resistance (θJA) of 31.2°C/W. At 1.5A load with 3.3V input and 1.8V output (1.5V drop × 1.5A = 2.25W dissipation), junction temperature rise is ~70°C above ambient - well within the -40°C to +125°C operating range if ambient stays ≤55°C. The exposed tab must be soldered to a solid ground plane for optimal conduction cooling.
MCP1827T-1802E/ET Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 1.5A
- Current - Output:
- 1.5A
- 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:
- DDPAK-5
MCP1827T-1802E/ET FAQ
1.How can I place an order for MCP1827T-1802E/ET through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1827T-1802E/ET 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 MCP1827T-1802E/ET reliable?
The price and inventory of MCP1827T-1802E/ET are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1827T-1802E/ET is usually 5 days.
3.What payment methods are accepted for MCP1827T-1802E/ET?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1827T-1802E/ET transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1827T-1802E/ET?
MCP1827T-1802E/ET orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1827T-1802E/ET 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 MCP1827T-1802E/ET?
For technical support, including MCP1827T-1802E/ET datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1827T-1802E/ET requirements.
6.How does Aetrix verify that MCP1827T-1802E/ET is sourced from the original manufacturer or authorized distributors?
All MCP1827T-1802E/ET 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 MCP1827T-1802E/ET meets industry standards.
7.What is the process for return or replacement of MCP1827T-1802E/ET?
All MCP1827T-1802E/ET units undergo pre-shipment inspection (PSI). If there is an issue with MCP1827T-1802E/ET, 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 MCP1827T-1802E/ET part is unused and in its original packaging.
Return procedure for MCP1827T-1802E/ET:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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