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MCP1825S-3302E/DB

MCHPMCP1825S-3302E/DB

Microchip Technology
Linear Voltage Regulator IC Positive Fixed 1 Output 500mA SOT-223-3
Active28,209 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The MCP1825S-3302E/DB is a 500mA low dropout (LDO) linear regulator providing a fixed 3.3V output from an input range of 2.1V to 6V. It is housed in a 3-pin SOT-223 package, offering a balance between thermal performance and board space for low-voltage applications. This regulator is designed for stability with ceramic output capacitors and features a low typical quiescent current of 120uA.

Why Choose This Part

This regulator offers excellent thermal management via the SOT-223 package while maintaining a low profile. It includes integrated safety features such as short circuit current limiting, overtemperature protection, and undervoltage lockout (UVLO). The device is stable with low-ESR ceramic capacitors, reducing the overall bill-of-materials cost and footprint.

Applications

Networking Backplane Cards
Provides stable 3.3V rails for communication processors and logic in networking infrastructure.
Notebook and Palmtop Computers
Local regulation for peripheral controllers and I/O rails where low dropout voltage is required.
High-Speed Driver Chipsets
Supplies clean power to sensitive driver ICs with a 60dB PSRR at 100Hz to minimize supply noise interference.
Network Interface Cards (NICs)
Regulates power for Ethernet controllers and physical layer transceivers in compact form factors.

Key Specifications

PSRR 60dB (100Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Current - Output 500mA
Protection Features Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 6V
Voltage Dropout (Max) 0.35V @ 500mA
Supplier Device Package SOT-223-3
Current - Quiescent (Iq) 220 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

When designing with the MCP1825S, ensure a minimum output capacitance of 1uF (ceramic) is placed close to the VOUT and GND pins for stability. Given the SOT-223 package, provide adequate copper area on the ground plane to manage heat dissipation when operating near the 500mA limit. Verify that the input voltage remains between 2.1V and 6V to maintain regulation and avoid triggering the UVLO.

MCP1825 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Protection Features Stock
MCP1825S-3302E/DB (this part) 4-261 Over Temperature, .. 28,209
MCP1825S-3302E/AB 3-220 Over Temperature, .. 548
MCP1825T-3302E/DCVAO 6-223 Over Current, Over.. 2,911

Also Consider

AMS1117-3.3 Advanced Monolithic Systems - A widely used industry-standard alternative for 3.3V regulation, though it typically requires a higher dropout voltage.
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