ADP2120

RECOMMENDED FOR NEW DESIGNS

1.25A, 1.2MHz Synchronous Step-Down DC-to-DC Regulator

Data Sheet (Rev. A) Product Selection Table

Part Models: 7
1ku List Price: Starting From $1.21

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Part Details

Continuous output current: 1.25A
145 mΩ and 70 mΩ integrated FET
Input voltage range from 2.3V to 5.5 V
Output voltage from 0.6V to V_IN
±1.5% output accuracy
1.2MHz fixed switching frequency
Synchronizable between 1.0MHz and 2MHz
Selectable PWM or PFM mode operation

Current mode architecture
Precision threshold enable input
Power-good flag
Voltage tracking input
Integrated soft start
Internal compensation
Start up with precharged output
See data sheet for additional features

Part Models: 7
1ku List Price: Starting From $1.21

Documentation

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
ADP2120ACPZ-1.0-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADP2120ACPZ-1.2-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADP2120ACPZ-1.5-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADP2120ACPZ-1.8-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADP2120ACPZ-2.5-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADP2120ACPZ-3.3-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
ADP2120ACPZ-R7	10-Lead LFCSP (3mm x 3mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 27, 2018 - 18_0018 ADP2119 ADP2120 Minor Mask Change
		PCN18_0018_Form Material_Report Qualification Results Summary
ADP2120ACPZ-1.0-R7	PRODUCTION
ADP2120ACPZ-1.2-R7	PRODUCTION
ADP2120ACPZ-1.5-R7	PRODUCTION
ADP2120ACPZ-1.8-R7	PRODUCTION
ADP2120ACPZ-2.5-R7	PRODUCTION
ADP2120ACPZ-3.3-R7	PRODUCTION
ADP2120ACPZ-R7	PRODUCTION
Aug 6, 2014 - 13_0223 Assembly and Test Transfer of Select 2x3mm and 3x3mm LFCSP Products to STATS ChipPAC China
		PCN13_0223_Form Material_Report Detailed Change Description Qualification Results Summary Test Correlation Report
ADP2120ACPZ-1.0-R7	PRODUCTION
ADP2120ACPZ-1.2-R7	PRODUCTION
ADP2120ACPZ-1.5-R7	PRODUCTION
ADP2120ACPZ-1.8-R7	PRODUCTION
ADP2120ACPZ-2.5-R7	PRODUCTION
ADP2120ACPZ-3.3-R7	PRODUCTION
ADP2120ACPZ-R7	PRODUCTION
May 23, 2012 - 10_0047 TSMC Fab 10 Qualification for LD20 Process
		PCN10_0047_Form Material_Report
ADP2120ACPZ-1.0-R7	PRODUCTION
ADP2120ACPZ-1.2-R7	PRODUCTION
ADP2120ACPZ-1.5-R7	PRODUCTION
ADP2120ACPZ-1.8-R7	PRODUCTION
ADP2120ACPZ-2.5-R7	PRODUCTION
ADP2120ACPZ-3.3-R7	PRODUCTION
ADP2120ACPZ-R7	PRODUCTION
Feb 25, 2025 - 25_0055 Gold Wire to Copper Wire Conversion(PCA)
		PCN25_0055_Form Material_Report Qualification Results Summary Qualification Results Summary Qualification Results Summary Qualification Results Summary
ADP2120ACPZ-1.2-R7	PRODUCTION
ADP2120ACPZ-1.8-R7	PRODUCTION
ADP2120ACPZ-3.3-R7	PRODUCTION

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

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

ADP2120-1.0
ADP2120-1.2
ADP2120-1.5
ADP2120-1.8
ADP2120-2.5
ADP2120-3.3
ADP2120-ADJ

SIMPLIS Models 1

ADP2120 SIMPLIS Schematic

ADP21xx Buck Regulator Design Tool

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

Open Tool

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