Microchip Technology

MCP1257T-E/UN  

DC Switching Voltage Regulators

MCP1257T-E/UN Description

The MCP1257T-E/UN from Microchip Technology is a high-efficiency, fixed-output charge pump DC-DC voltage regulator designed to deliver a stable 3.3V output from an input voltage range of 1.8V to 3.6V. With a compact 10MSOP package and surface-mount design, it is optimized for space-constrained applications. This non-synchronous regulator operates at a 650kHz switching frequency, ensuring low noise and high efficiency while delivering up to 100mA of output current. Its RoHS3 compliance and REACH-unaffected status make it suitable for environmentally conscious designs.

MCP1257T-E/UN Features

• Wide Input Range (1.8V–3.6V): Supports low-voltage sources like single-cell Li-ion batteries or two-cell alkaline/NiMH batteries.
• Fixed 3.3V Output: Eliminates the need for external feedback components, simplifying design.
• High Efficiency (Charge Pump Topology): No inductors required, reducing board space and cost.
• Low Noise Operation: 650kHz switching frequency minimizes EMI interference.
• Compact & Robust: 10MSOP package with MSL 1 (Unlimited) moisture sensitivity, ideal for automated assembly.
• 100mA Output Current: Sufficient for low-power microcontrollers, sensors, and portable devices.
• Non-Synchronous Design: Reduces complexity while maintaining reliability.

MCP1257T-E/UN Applications

• Battery-Powered Devices: Ideal for wearables, IoT sensors, and handheld electronics due to low quiescent current and wide input range.
• Embedded Systems: Powers 3.3V microcontrollers (e.g., PIC, ARM Cortex-M) in space-constrained designs.
• Industrial & Consumer Electronics: Used in smart meters, wireless modules, and USB-powered peripherals.
• Backup Power Supplies: Provides regulated voltage in supercapacitor or battery backup systems.

Conclusion of MCP1257T-E/UN

The MCP1257T-E/UN stands out for its simplicity, efficiency, and compact footprint, making it a superior choice for low-power, portable, and noise-sensitive applications. Its fixed 3.3V output and charge pump topology eliminate the need for bulky inductors, while its wide input range ensures compatibility with diverse power sources. For engineers seeking a reliable, cost-effective voltage regulator for battery-operated or miniaturized systems, this Microchip offering delivers exceptional performance with minimal design overhead.

MCP1257T-E/UN Documents

Download datasheets and manufacturer documentation for MCP1257T-E/UN

Datasheets :

Analog and Interface Product Guide       MCP1256/7/8/9 Datasheet      

PCN Packaging :

Packing Changes 10/Oct/2016       Label and Packing Changes 23/Sep/2015      

Manuals :

Development Tools Catalog      

Design Resources :

MCP1257 Development Tool Selector      

Other Related Documents :

Portable Power Conversion Design Guide      

HTML Datasheet :

MCP1256/7/8/9 Datasheet      

Environmental Information :

Microchip CA Prop65       Microchip RoHS       Microchip REACH