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    Parts    MCP1703-3302E/DB
MCP1703-3302E/DB

MCHPMCP1703-3302E/DB

Microchip Technology
LDO Voltage Regulators Low Iq 250mA LDO Vin 16V maxVout 3.3V
NRND3,892 in stock
Datasheet Mouser Compare Prices

Overview

The MCP1703-3302E/DB is a low dropout (LDO) voltage regulator designed to deliver up to 250mA at a fixed 3.3V output. It features an exceptionally low quiescent current of 2.0 uA, making it ideal for battery-operated systems where standby power consumption is critical. The device supports input voltages up to 16V, allowing for use with multi-cell battery stacks or unregulated DC sources.

Why Choose This Part

The primary advantage is the ultra-low 2.0 uA quiescent current which is significantly lower than standard LDOs. It offers integrated short-circuit and overtemperature protection in a space-saving SOT-223 package, ensuring system robustness without external protection components. The 16V input range provides a wide safety margin for 9V or 12V nominal systems.

Applications

Battery-Powered Smoke and CO Detectors
Provides a stable 3.3V rail for sensors while maintaining extremely low idle current to extend battery life for several years.
Smart Battery Packs
Regulates internal monitoring circuitry from the battery stack voltage with minimal self-discharge.
Remote Data Loggers
Powers microcontrollers and low-power sensors in isolated environments using solar-charged or primary cell batteries.
Mobile Handheld Devices
Serves as a high-efficiency regulator for pagers, PDAs, and cellular peripherals requiring up to 250mA peak current.

Key Specifications

PSRR 44dB (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
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 ensure stability, use a minimum of 1uF ceramic, tantalum, or aluminum electrolytic output capacitance. The SOT-223 package requires adequate PCB copper area for heat dissipation if operating near the 16V maximum input at full 250mA load. No external bypass capacitor is required for the internal reference, simplifying the BOM.

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
MCP1703-3302E/DB (this part) 100Hz 4-261 250mA -40degC ~ 125degC 0.725V 3.3V 3,892
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
MCP1703AT-3302E/DB 100Hz 4-261 250mA -40degC ~ 125degC .. 0.725V 3.3V 9,441
Also available as: MCP1703AT-5002E/MBVAO, MCP1703AT-5002E/CBVAO, MCP1703T-3302E/DB

Also Consider

MCP1700T-3302E/TT MCHPMicrochip Technology - Lower 1.6uA quiescent current but limited to a maximum input voltage of 6V.