ADP2108
PRODUCTIONCompact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter
- Part Models
- 15
- 1ku List Price
- Starting From $1.02
Overview
- Peak efficiency: 95%
- 3 MHz fixed frequency operation
- Typical quiescent current: 18 μA
- Maximum load current: 600 mA
- Input voltage: 2.3 V to 5.5 V
- Uses tiny multilayer inductors and capacitors
- Current mode architecture for fast load and line transient response
- 100% duty cycle low dropout mode
- Internal synchronous rectifier
- Internal soft start
- See data sheet for additional Information
The ADP2108 is a high efficiency, low quiescent current step-down dc-to-dc converter manufactured in two different packages. The total solution requires only three tiny external components. It uses a proprietary, high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2108 has a power save mode that reduces the switching frequency under light load conditions.
The ADP2108 runs on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 600 mA is achievable across the input voltage range.
The ADP2108 is available in fixed output voltages of 3.3 V, 3.0 V, 2.5 V, 2.3 V, 1.82 V, 1.8 V, 1.5 V, 1.3 V, 1.2 V, 1.1 V, and 1.0 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2108 has an internal soft start and is internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2108 draws less than 1 μA from the input source.
Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input current over-shoot at startup. The ADP2108 is available in 5-ball WLCSP and 5-lead TSOT packages. The ADP2109 provides the same features and operations as the ADP2108 and has the additional function of a discharge switch in the WLCSP package.
APPLICATIONS
- PDAs and palmtop computers
- Wireless handsets
- Digital audio, portable media players
- Digital cameras, GPS navigation units
Documentation
Data Sheet 1
User Guide 1
Application Note 2
Technical Articles 1
Evaluation Design File 2
Frequently Asked Question 1
Circuit Note 1
Power Reference Designs 2
Analog Dialogue 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 |
|---|---|---|---|
| ADP2108ACBZ-1.0-R7 | 5-Ball WLCSP (1.02mm x 1.45mm) | ||
| ADP2108ACBZ-1.2-R7 | 5-Ball WLCSP (1.02mm x 1.45mm) | ||
| ADP2108ACBZ-1.5-R7 | 5-Ball WLCSP (1.02mm x 1.45mm) | ||
| ADP2108ACBZ-1.8-R7 | 5-Ball WLCSP (1.02mm x 1.45mm) | ||
| ADP2108ACBZ-2.5-R7 | 5-Ball WLCSP (1.02mm x 1.45mm) | ||
| ADP2108ACBZ-3.0-R7 | 5-Ball WLCSP (1.02mm x 1.45mm) | ||
| ADP2108ACBZ-3.3-R7 | 5-Ball WLCSP (1.02mm x 1.45mm) | ||
| ADP2108AUJZ-1.0-R7 | 5-Lead TSOT | ||
| ADP2108AUJZ-1.2-R7 | 5-Lead TSOT | ||
| ADP2108AUJZ-1.3-R7 | 5-Lead TSOT | ||
| ADP2108AUJZ-1.5-R7 | 5-Lead TSOT | ||
| ADP2108AUJZ-1.8-R7 | 5-Lead TSOT | ||
| ADP2108AUJZ-2.5-R7 | 5-Lead TSOT | ||
| ADP2108AUJZ-3.0-R7 | 5-Lead TSOT | ||
| ADP2108AUJZ-3.3-R7 | 5-Lead TSOT |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 28, 2012 - 11_0175 Shipping Changes for WLCSP Products with 8mm Carrier Tape Width |
||
| ADP2108ACBZ-1.0-R7 | PRODUCTION | |
| ADP2108ACBZ-1.2-R7 | PRODUCTION | |
| ADP2108ACBZ-1.5-R7 | PRODUCTION | |
| ADP2108ACBZ-1.8-R7 | PRODUCTION | |
| ADP2108ACBZ-2.5-R7 | PRODUCTION | |
| ADP2108ACBZ-3.0-R7 | PRODUCTION | |
| ADP2108ACBZ-3.3-R7 | PRODUCTION | |
|
Jan 26, 2010 - 10_0007 Halogen Free Material Change for TSOT Products |
||
| ADP2108AUJZ-1.0-R7 | PRODUCTION | |
| ADP2108AUJZ-1.2-R7 | PRODUCTION | |
| ADP2108AUJZ-1.3-R7 | PRODUCTION | |
| ADP2108AUJZ-1.5-R7 | PRODUCTION | |
| ADP2108AUJZ-1.8-R7 | PRODUCTION | |
| ADP2108AUJZ-2.5-R7 | PRODUCTION | |
| ADP2108AUJZ-3.0-R7 | PRODUCTION | |
| ADP2108AUJZ-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:
- ADP2108-1.0
- ADP2108-1.1
- ADP2108-1.2
- ADP2108-1.3
- ADP2108-1.5
- ADP2108-1.8
- ADP2108-1.82
- ADP2108-2.3
- ADP2108-2.5
- ADP2108-3.0
- ADP2108-3.3
ADI Linear Regulator Design Tool and Parametric Search
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
Open ToolADP21xx 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
ADP2108 Evaluation Board
Resources
Reference Designs
Robust, Multivoltage, High Efficiency, 25 W Universal Power Supply Module with 6 V to 14 V Input