MAX1921

Name: MAX1921
Brand: Analog Devices
Availability: OutOfStock

PRODUCTION

Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23

Data Sheet (Rev. 3) Product Selection Table

Part Models: 9
1ku List Price: Starting From $2.26

Viewing:

Overview

400mA Guaranteed Output Current

Internal Synchronous Rectifier for >90% Efficiency

Tiny 6-Pin SOT23 Package

Available in 6-Pin TDFN Package (MAX1920)

Up to 1.2MHz Switching Frequency for Small External Components

50µA Quiescent Supply Current

0.1µA Logic-Controlled Shutdown

2V to 5.5V Input Range

Fixed 1.5V, 1.8V, 2.5V, 3V, and 3.3V Output Voltages (MAX1921)

Adjustable Output Voltage (MAX1920)

±1.5% Initial Accuracy

Soft-Start Limits Startup Current

Part Models: 9
1ku List Price: Starting From $2.26

Documentation

Data Sheet 1

MAX1920-MAX1921: Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23 Data Sheet (Rev.3) 09/20/2005

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX1921EUT15+	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT18+	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT18+T	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT25+	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT25+T	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT30+	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT30+T	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT33+	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
MAX1921EUT33+T	Small-Outline Transistor Package	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 5, 2015 - 1370_CANCELLATION ASSEMBLY
		pcn_1370_cancellation
MAX1921EUT15+
MAX1921EUT18+	PRODUCTION
MAX1921EUT25+T	PRODUCTION
MAX1921EUT33+	PRODUCTION
MAX1921EUT33+T	PRODUCTION
Apr 20, 2026 - 2571C PIN/ERRATA
		pcn_2571c
MAX1921EUT18+T	PRODUCTION
MAX1921EUT25+T	PRODUCTION
MAX1921EUT33+T	PRODUCTION
Nov 1, 2021 - 2209 ASSEMBLY
		pcn_2209
MAX1921EUT25+	PRODUCTION
MAX1921EUT25+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Evaluation Kits

Evaluation Kit for the MAX1920, MAX1921

Buy Now View Details

Features and Benefits

2V to 5.5V Input Voltage Range
Output Voltage
- 1.8V Fixed Output Voltage (MAX1921EUT18-T)
- Adjustable Output Voltage (MAX1920EUT-T)
- Other Fixed-Output Voltages (MAX1921EUT_ _-T)
Output Current
- Guaranteed 400mA at >2.5V Input Voltage
IC Shutdown Current
- 0.1µA (typ)
Surface-Mount Components
Fully Assembled and Tested

Product Details

The MAX1921 evaluation kit (EV kit) provides a fixed 1.8V output voltage from a 2V to 5.5V input source and delivers up to 400mA output current. The MAX1921 is a step-down switching regulator with an internal power switch and synchronous rectifier in a tiny SOT23 package.

The MAX1921 EV kit is a fully assembled and tested surface-mount circuit board. The MAX1921 EV kit can also be used to evaluate other fixed-output voltage versions of the MAX1921 or the MAX1920, which is a step-down switching regulator with an adjustable output voltage. Additional pads on the board are provided for external feedback resistors to set different output voltages, 1.25V to V_IN.

Applications