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    Parts    MCP1703AT-3302E/DB
MCP1703AT-3302E/DB

MCHPMCP1703AT-3302E/DB

Microchip Technology
LDO Voltage Regulators LOW Iq, High Vin LDO
9,441 in stock
Datasheet Mouser Compare Prices

Overview

The MCP1703AT-3302E/DB is a low-quiescent current fixed-output LDO voltage regulator capable of delivering up to 250mA. It is designed to operate with an input voltage up to 16V, making it suitable for systems powered by multi-cell alkaline or lithium batteries. With a typical quiescent current of only 2.0uA, it is optimized for applications where standby power consumption is critical.

Why Choose This Part

The primary advantage is the ultra-low 2.0uA typical quiescent current, which significantly reduces the power budget in idle states. It features built-in overcurrent and overtemperature protection, and its SOT-223 package offers better thermal dissipation than smaller SMT alternatives while maintaining a small footprint.

Applications

Battery-Powered IoT Nodes
Provides a regulated 3.3V rail for microcontrollers and sensors while maintaining extremely low current draw during sleep modes.
Keep-Alive Power Supplies
Powers real-time clocks (RTC) or volatile memory in industrial equipment that must remain active when the primary system is powered down.
Handheld Medical Devices
Delivers stable power for portable instrumentation where high efficiency at low loads extends battery life.

Key Specifications

PSRR 35dB (100Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Current - Output 250mA
Protection Features Over Current, Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC (TJ)
Voltage - Input (Max) 16V
Voltage Dropout (Max) 0.725V @ 250mA
Supplier Device Package SOT-223-3
Current - Quiescent (Iq) 5 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this LDO, use a 1uF ceramic output capacitor for stability across the full load range. Ensure the input voltage stays between 2.7V and 16V, and calculate the thermal rise based on the 0.725V maximum dropout at 250mA for high-load applications.

MCP1703 Family

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

Part Number PSRR Package Output I Temp Range Voltage Dropout (Max) Output V Stock
MCP1703AT-3302E/DB (this part) 100Hz 4-261 250mA -40degC ~ 125degC .. 0.725V 3.3V 9,441
MCP1703T-5002E/CB 100Hz 3-236 250mA -40degC ~ 125degC 0.65V 5V 27,261
MCP1703A-5002E/DBVAO 100Hz 4-261 250mA -40degC ~ 125degC 0.65V 5V 1,858
MCP1703A-5002E/DB 100Hz 4-261 250mA -40degC ~ 125degC 0.65V 5V 1,506
MCP1703AT-3302E/MBVAO 100Hz TO-243AA 250mA -40degC ~ 125degC .. 0.525V 3.3V 555
MCP1703T-1802E/CB 100Hz 3-236 200mA -40degC ~ 125degC — 1.8V 22,744
MCP1703T-2502E/CB 100Hz 3-236 250mA -40degC ~ 125degC 1.1V 2.5V 5,701
MCP1703AT-3302E/CBVAO 100Hz 3-236 250mA -40degC ~ 125degC .. 0.725V 3.3V 2,447
MCP1703T-3302E/CB 100Hz 3-236 250mA -40degC ~ 125degC 0.725V 3.3V 25,069
MCP1703-3302E/DB 100Hz 4-261 250mA -40degC ~ 125degC 0.725V 3.3V 3,892
Also available as: MCP1703AT-5002E/MBVAO, MCP1703AT-5002E/CBVAO, MCP1703T-3302E/DB

Also Consider

MCP1700T-3302E/TT MCHPMicrochip Technology - A lower input voltage alternative (6V max) with lower dropout for 3V battery applications.