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Microchip Technology MCP1826ST-2502E/EB
- Part No.:
- MCP1826ST-2502E/EB
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
MCP1826ST-2502E/EB.pdf
- Description:
- IC REG LINEAR 2.5V 1A 3DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:744
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Product details
Overview
MCP1826ST-2502E/EB from Microchip Technology is a 5-pin, fixed-output 2.5 V, 1000 mA low-dropout (LDO) linear regulator in SOT-223-5 package. It delivers stable 2.5 V output with ±0.5% regulation accuracy, 250 mV typical dropout at full load, and operates from 2.3 V to 6.0 V input. Designed for high-current, low-voltage power rails in portable computing and networking hardware.
For engineers reviewing the MCP1826ST-2502E/EB datasheet, MCP1826ST-2502E/EB pinout, MCP1826ST-2502E/EB application, or MCP1826ST-2502E/EB equivalent, key selection criteria include its 2.5 V fixed output, PWRGD open-drain status signal, SHDN active-low enable control, 120 µA quiescent current, and stability with 1.0 µF ceramic output capacitor.
Technical Context
The MCP1826ST-2502E/EB implements a PMOS pass transistor architecture enabling low dropout and fast transient response. Its internal error amplifier compares a scaled version of VOUT against a 0.41 V reference to regulate output voltage, with built-in soft-start and undervoltage lockout (UVLO) ensuring controlled startup.
It integrates dedicated circuitry for power-good monitoring (92% VOUT threshold, 200 µs fixed delay), thermal shutdown at 150°C with 10°C hysteresis, and short-circuit current limiting (2.2 A typical). The SHDN pin reduces supply current to 0.1 µA in shutdown mode, supporting battery-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±0.5% - ensures precise rail generation for 2.5 V logic, memory, or analog interfaces without external feedback components. |
| Max Output Current | 1000 mA - supports high-current digital loads such as FPGA I/O banks or high-speed transceivers without derating at ambient temperatures ≤ +85°C. |
| Dropout Voltage | 250 mV typical at 1000 mA - enables operation from 2.75 V input while maintaining regulation, critical for single-cell Li-ion or multi-cell alkaline systems. |
| Quiescent Current | 120 µA typical - minimizes standby power loss in always-on subsystems like real-time clocks or wake-up controllers. |
| Shutdown Current | 0.1 µA typical - allows deep-sleep modes in portable devices without compromising battery shelf life over months. |
| Power Good Delay | 200 µs typical - provides deterministic system reset timing after power stabilization, compatible with microcontroller POR requirements. |
| Stability Capacitor | 1.0 µF ceramic - eliminates need for bulky electrolytics, reduces PCB area and cost, and improves noise immunity vs. tantalum alternatives. |
Pinout & Package
SOT-223-5 surface-mount package with exposed thermal pad (GND-connected), rated for 62°C/W junction-to-ambient thermal resistance on standard 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN) | Active-low enable input | Pulls low to disable regulator output and reduce IQ to 0.1 µA; requires ≥45% VIN for logic-high recognition. |
| 2 (VIN) | Unregulated input supply | Accepts 2.3–6.0 V; must be decoupled with ≥1 µF ceramic capacitor placed near pin to suppress high-frequency noise and support load transients. |
| 3 (GND) | Ground reference and thermal pad | Connects to PCB ground plane; exposed tab serves as primary heat path-must be soldered to thermal copper for full current rating. |
| 4 (VOUT) | Regulated 2.5 V output | Delivers up to 1000 mA; requires ≥1.0 µF X7R/X5R ceramic capacitor directly at pin for stability and low-noise performance. |
| 5 (PWRGD) | Open-drain power-good indicator | Sinks current when VOUT reaches 92% of 2.5 V (i.e., ≥2.3 V); 200 µs delay ensures reliable system sequencing before release of reset signals. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS pass element | Enables ultra-low dropout (250 mV @ 1 A) and eliminates reverse-current flow during input brownout or shutdown. |
| Integrated PWRGD with fixed delay | Eliminates need for external supervisor ICs in space-constrained designs requiring deterministic power sequencing. |
| Thermal shutdown with hysteresis | Prevents latch-up during overload by disabling output at 150°C and re-enabling only after cooling by ≥10°C. |
| Stable with 1 µF ceramic output cap | Reduces BOM count and board area versus legacy LDOs requiring ≥10 µF tantalum, while improving reliability and temperature stability. |
| Low-noise operation (2.0 µV/√Hz) | Meets stringent noise requirements for ADC reference supplies and RF front-end biasing without additional filtering. |
Applications
| High-Speed Driver Chipset Power | Networking Backplane Cards |
|---|---|
Use Scenario: Powering PCIe Gen3/Gen4 retimers and SerDes driver ICs requiring clean, stable 2.5 V at up to 1 A peak current. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying core logic and I/O rails for high-speed serial interface chipsets. Use Value: 250 mV dropout enables use with 2.75 V intermediate bus; PWRGD synchronizes chipset initialization with host controller reset release. | Use Scenario: Local 2.5 V regulation for packet processor I/O buffers and PHY management circuits on telecom backplanes. IC Role / Device Role / Timing Role: Point-of-load regulator delivering regulated 2.5 V to high-density ASIC interfaces with fast transient response. Use Value: 120 µA quiescent current minimizes idle power in line cards; 1 µF ceramic stability simplifies layout in tight trace routing zones. |
| Notebook Computers | Network Interface Cards |
Use Scenario: Supplying 2.5 V to DDR3/DDR4 memory termination (VTT) regulators or embedded controller peripherals. IC Role / Device Role / Timing Role: Secondary LDO generating precision 2.5 V rail from main 3.3 V or 5 V supply, with SHDN controlled by EC firmware. Use Value: 0.1 µA shutdown current extends battery runtime during suspend-to-RAM; thermal pad enables compact placement near memory modules. | Use Scenario: Providing 2.5 V to Gigabit Ethernet PHYs and MAC controllers in PCIe-based NICs. IC Role / Device Role / Timing Role: Dedicated 2.5 V regulator ensuring voltage compliance for IEEE 802.3ab-compliant PHY analog sections. Use Value: ±0.5% output tolerance meets PHY supply spec; PSRR >60 dB at 100 Hz rejects switching noise from adjacent DC/DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2502E/MB | 300 mA max output, same 2.5 V fixed output, SOT-23-5 package, no PWRGD pin | Lacks power-good signaling and lower current capability limits use to low-power peripherals only | Select when board space is constrained and PWRGD is unnecessary; verify load current ≤300 mA |
| TLS850F2TE/V33 | Automotive-grade AEC-Q100 qualified, 500 mA output, integrated watchdog, different pinout | Designed for automotive infotainment and ADAS; not optimized for consumer portable thermal profiles | Choose for automotive environments requiring extended temperature range and functional safety features |
Compared with MCP1703T-2502E/MB and TLS850F2TE/V33, the MCP1826ST-2502E/EB uniquely combines 1000 mA output, PWRGD signaling, and 1 µF ceramic stability in a thermally enhanced SOT-223-5 package-making it optimal for high-current, non-automotive embedded systems needing deterministic power sequencing.
Availability
MCP1826ST-2502E/EB 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 assurance, and consistent parametric performance across production batches.
Supply support for MCP1826ST-2502E/EB 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 microcontrollers, analog, and Flash-IP solutions, serving industrial, automotive, communications, and consumer markets with vertically integrated silicon and software tools.
The MCP1826 product line was designed specifically for high-current, low-voltage portable and networking applications demanding ultra-low dropout, minimal quiescent current, and robust thermal protection in compact packages.
FAQ
What is the maximum input voltage rating for the MCP1826ST-2502E/EB?
The MCP1826ST-2502E/EB has an absolute maximum input voltage rating of 6.5 V. Its operational input voltage range is specified as 2.3 V to 6.0 V. Exceeding 6.5 V may cause permanent damage. For reliable 2.5 V output regulation at full 1000 mA load, minimum input must be ≥2.75 V (2.5 V + 250 mV dropout).
Does the MCP1826ST-2502E/EB require an external resistor divider to set the output voltage?
No. The MCP1826ST-2502E/EB is a fixed-output variant delivering 2.5 V without external feedback components. Unlike adjustable MCP1826 versions that use the ADJ pin with resistor dividers, this part integrates internal resistors to set VOUT = 2.5 V, simplifying design and reducing component count.
How does the PWRGD pin function on the MCP1826ST-2502E/EB?
The PWRGD pin on the MCP1826ST-2502E/EB is an open-drain output that goes low when VOUT falls below 92% of 2.5 V (≤2.3 V) and pulls high (via external pull-up) when VOUT rises above that threshold. Its 200 µs fixed delay ensures system controllers receive a clean, debounced power-good assertion after output stabilization.
Can the MCP1826ST-2502E/EB operate with a 1.0 µF ceramic output capacitor?
Yes. The MCP1826ST-2502E/EB is explicitly characterized and guaranteed stable with a minimum 1.0 µF X7R or X5R ceramic capacitor on VOUT. This eliminates reliance on higher-ESR tantalum or aluminum-electrolytic capacitors, reducing size, cost, and aging-related drift in the final design.
What thermal considerations apply to the MCP1826ST-2502E/EB in SOT-223-5 package?
In the SOT-223-5 package, the MCP1826ST-2502E/EB exhibits 62°C/W junction-to-ambient thermal resistance on a standard 4-layer board. To sustain 1000 mA continuous output at ambient temperatures above +60°C, the exposed GND pad must be soldered to ≥1 cm² of internal/external copper pour. Thermal shutdown activates at 150°C with 10°C hysteresis.
MCP1826ST-2502E/EB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- 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):
- 0.4V @ 1A
- Current - Output:
- 1A
- 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:
- Surface Mount
- Supplier Device Package:
- DDPAK-3
MCP1826ST-2502E/EB FAQ
1.How can I place an order for MCP1826ST-2502E/EB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1826ST-2502E/EB 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 MCP1826ST-2502E/EB reliable?
The price and inventory of MCP1826ST-2502E/EB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1826ST-2502E/EB is usually 5 days.
3.What payment methods are accepted for MCP1826ST-2502E/EB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1826ST-2502E/EB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1826ST-2502E/EB?
MCP1826ST-2502E/EB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1826ST-2502E/EB 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 MCP1826ST-2502E/EB?
For technical support, including MCP1826ST-2502E/EB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1826ST-2502E/EB requirements.
6.How does Aetrix verify that MCP1826ST-2502E/EB is sourced from the original manufacturer or authorized distributors?
All MCP1826ST-2502E/EB 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 MCP1826ST-2502E/EB meets industry standards.
7.What is the process for return or replacement of MCP1826ST-2502E/EB?
All MCP1826ST-2502E/EB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1826ST-2502E/EB, 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 MCP1826ST-2502E/EB part is unused and in its original packaging.
Return procedure for MCP1826ST-2502E/EB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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