EmbeddedRelated.com
Jacob Beningo
Live online course · Jacob Beningo
AI for Embedded Developers
$100 off for EmbeddedRelated readers until Nov 1 · 5 live sessions, Dec 7-11
Discount ends in
15days 01hrs 22min 56sec
Learn More →
    Parts    MCP1703T-1802E/CB
MCP1703T-1802E/CB

MCHPMCP1703T-1802E/CB

Microchip Technology
Linear Voltage Regulator IC Positive Fixed 1 Output 200mA SOT-23A-3
NRND22,744 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The MCP1703T-1802E/CB is a low dropout (LDO) linear regulator designed for low power consumption and battery-operated electronics. It provides a fixed 1.8V output with an extremely low quiescent current of only 2uA, making it ideal for systems that spend significant time in sleep mode. This regulator can handle input voltages up to 16V and delivers a maximum output current of 250mA.

Why Choose This Part

The primary advantage is the ultra-low 2uA quiescent current which significantly extends the life of battery-powered systems. It supports a wide input voltage range up to 16V, allowing for use with multi-cell battery configurations, and includes integrated short-circuit and overtemperature protection.

Applications

Battery-Powered Smoke Detectors
Provides a stable 1.8V rail for low-power logic while maximizing battery life due to its 2uA quiescent current.
Microcontroller Power
Supplies clean power to 1.8V MCUs in remote sensing applications where efficiency at low loads is critical.
Smart Battery Packs
Used within battery management systems to power internal circuitry from high-voltage multi-cell inputs up to 16V.
Solar-Powered Instruments
Acts as a primary regulator for energy harvesting systems that require minimal overhead current to maintain regulation.

Key Specifications

PSRR 44dB (100Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3
Current - Output 200mA
Protection Features Over Current, Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 16V
Supplier Device Package SOT-23A-3
Current - Quiescent (Iq) 5 uA
Voltage - Output (Min/Fixed) 1.8V

Getting Started

When designing your PCB, place a minimum of 1uF ceramic output capacitor as close to the pins as possible to ensure stability and improve transient response. Note that the SOT-23A-3 package has a specific pinout; always verify the layout against the datasheet pin assignment for the CB suffix.

MCP1703 Family

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

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

Also Consider

MCP1700T-1802E/TT MCHPMicrochip Technology - Similar low-power performance but with a lower maximum input voltage of 6V, suitable for single-cell Li-ion applications.