ADP2120
PRODUCTION1.25A, 1.2MHz Synchronous Step-Down DC-to-DC Regulator
- Part Models
- 7
- 1ku List Price
- Starting From $1.53
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 VIN
- ±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 (VIN) 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
Documentation
Data Sheet 1
User Guide 1
Application Note 1
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) | ||
| ADP2120ACPZ-1.2-R7 | 10-Lead LFCSP (3mm x 3mm) | ||
| ADP2120ACPZ-1.5-R7 | 10-Lead LFCSP (3mm x 3mm) | ||
| ADP2120ACPZ-1.8-R7 | 10-Lead LFCSP (3mm x 3mm) | ||
| ADP2120ACPZ-2.5-R7 | 10-Lead LFCSP (3mm x 3mm) | ||
| ADP2120ACPZ-3.3-R7 | 10-Lead LFCSP (3mm x 3mm) | ||
| ADP2120ACPZ-R7 | 10-Lead LFCSP (3mm x 3mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 27, 2018 - 18_0018 ADP2119 ADP2120 Minor Mask Change |
||
| 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 |
||
| 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 |
||
| 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) |
||
| 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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Request a Driver/SoftwareTools & 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
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 ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
ADP2120 Evaluation Board
Resources
ADP2119 Evaluation Board
Resources
Software-Defined Radio