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MCP1703AT-3302E/MBVAO

MCHPMCP1703AT-3302E/MBVAO

Microchip Technology
LDO Voltage Regulators LOWIQ 250MA LDO, VIN 16V MAX, VOUT=3.3V
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Overview

The MCP1703AT-3302E/MBVAO is a high-voltage, low quiescent current (Iq) linear regulator designed for automotive and battery-powered applications. It delivers a fixed 3.3V output at up to 250mA from an input voltage as high as 16V, making it suitable for systems directly connected to multi-cell battery packs or automotive power rails. The AEC-Q100 qualification ensures reliability in harsh environments, while the 2uA typical quiescent current helps extend battery life in standby modes.

Why Choose This Part

This regulator offers an exceptionally low 2uA quiescent current, significantly reducing power consumption during inactive periods. It features built-in overtemperature and short-circuit protection, and is stable with small ceramic capacitors (1uF to 22uF), which saves PCB space and reduces BOM cost.

Applications

Automotive Electronics
Ideal for 12V automotive subsystems requiring a stable 3.3V supply for sensors and microcontrollers with AEC-Q100 certification.
Battery-Powered Alarms
Perfect for smoke and CO2 detectors where extremely low standby current is required to maintain multi-year battery life.
Smart Battery Packs
Provides local power for battery management system (BMS) controllers within multi-cell lithium-ion or lead-acid packs.
Industrial Handhelds
Supports portable instrumentation and pagers that need a compact, low-noise power source with short-circuit protection.

Key Specifications

PSRR 35dB (100Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-243AA
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) 0.525V @ 250mA
Supplier Device Package SOT-89-3
Current - Quiescent (Iq) 5 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

When designing with this LDO, place a 1.0uF ceramic capacitor as close as possible to the input and output pins for stability. Ensure the SOT-89 package (TO-243AA) has adequate copper pour for thermal dissipation, especially when operating near the 16V maximum input voltage at high load currents.

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/MBVAO (this part) 100Hz TO-243AA 250mA -40degC ~ 125degC .. 0.525V 3.3V 555
MCP1703AT-3302E/CBVAO 100Hz 3-236 250mA -40degC ~ 125degC .. 0.725V 3.3V 2,447
MCP1703A-5002E/DBVAO 100Hz 4-261 250mA -40degC ~ 125degC 0.65V 5V 1,858
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
MCP1703-3302E/DB 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/DB 100Hz 4-261 250mA -40degC ~ 125degC 0.65V 5V 1,506
MCP1703T-1802E/CB 100Hz 3-236 200mA -40degC ~ 125degC — 1.8V 22,744
Also available as: MCP1703AT-5002E/MBVAO, MCP1703AT-5002E/CBVAO, MCP1703T-3302E/DB

Also Consider

MCP1700T-3302E/TT MCHPMicrochip Technology - A popular lower-voltage alternative (6V max input) with 1.6uA Iq for single-cell Li-ion applications.