ADP2120

PRODUCTION

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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Overview

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

The ADP2119 / ADP2120 are low quiescent current, synchronous, step-down DC-to -DC regulators in a compact 3mm x3mm LFCSP_WD package. Both Devices use current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. Under light load condition, they can be configured to operate in pulse frequency modulation (PFM) mode that reduces switching frequency to save power.

The ADP2119/ADP2120 can support input voltages from 2.3V to 5.5V. The output voltage can be adjusted from 0.6V to input voltage (V_IN) for the adjustable version, while the fixed output version is available in preset output voltage options of 3.3V, 2.5V, 1.8V, 1.5V ,1.2V and 1.0V. The ADP2119/ADP2120 require minimal external parts and provide a high efficiency solution with their integrated power switches, synchronous rectifier, and internal compensation. Each IC draws less than 3 μA current from the input source when it is disabled. Other key features include under voltage lockout(UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), over current protection (OCP) and thermal shutdown (TSD).

APPLICATIONS

Point of load conversion
Communications and networking equipment
Industrial and instrumentation
Consumer electronics
Medical appliances

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

ADP21xx Buck Regulator Design Tool

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SIMPLIS Models 1

ADP2120 SIMPLIS Schematic

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