ADP2108 Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter
PDAs and palmtop computers
Wireless handsets
Digital audio, portable media players
Digital cameras, GPS navigation units
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 rect-ifier 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
Features and Benefits- 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
| Design ToolsReference Designs |
Data Sheets
Application Notes
User Guides
Frequently Asked Questions
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|
| ADP2108ACBZ-1.0-R7 Production | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-1.1-R7 Last Time Buy | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-1.2-R7 Production | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-1.3-R7 Last Time Buy | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-1.5-R7 Production | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-1.8-R7 Production | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-1.82R7 Last Time Buy | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-2.3-R7 Last Time Buy | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-2.5-R7 Production | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-3.0-R7 Production | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108ACBZ-3.3-R7 Production | WLCSP Discription 5 Ball WLCSP (1.02x1.45) | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-1.0-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-1.1-R7 Last Time Buy | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-1.2-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-1.3-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-1.5-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-1.8-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-1.82R7 Last Time Buy | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-2.3-R7 Last Time Buy | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-2.5-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-3.0-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADP2108AUJZ-3.3-R7 Production | 5 ld TSOT | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
|---|
| ADP2108-1.1-EVALZ | Evaluation Board | 60 | Y |
| ADP2108-1.2-EVALZ | Evaluation Board | 60 | Y |
| ADP2108-1.3-EVALZ | Evaluation Board | 60 | Y |
| ADP2108-1.5-EVALZ | Evaluation Board | 60 | Y |
| ADP2108-1.82-EVALZ | Evaluation Board | 60 | Y |
| ADP2108-1.8-EVALZ | Evaluation Board | 60 | Y |
| ADP2108-3.3-EVALZ | Evaluation Board | 60 | Y |
| ADP2108UJZ-REDYKIT | Evaluation Board | 120 | Y |
Reference Materials
