Overview
The ADP2108AUJZ-2.3-R7, produced by Analog Devices Inc., is a high-efficiency, low quiescent current step-down DC-to-DC converter. This device is designed to operate with input voltages ranging from 2.3 V to 5.5 V, making it suitable for a variety of battery-powered applications, including single lithium or lithium polymer cells, multiple alkaline or NiMH cells, and other power sources like PCMCIA and USB. The ADP2108 features a fixed frequency of 3 MHz and uses a proprietary high-speed current mode, constant frequency PWM control scheme for excellent stability and transient response.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 5.5 V |
| Output Voltage Range | Down to 1.0 V |
| Maximum Load Current | 600 mA |
| Fixed Frequency | 3 MHz |
| Typical Quiescent Current | 18 μA |
| Peak Efficiency | 95% |
| Shutdown Supply Current | 0.2 μA |
| Package Types | 5-ball WLCSP, 5-lead TSOT |
Key Features
- High efficiency with peak efficiency of 95%
- Low quiescent current of 18 μA
- Fixed frequency operation at 3 MHz
- Current mode architecture for fast load and line transient response
- 100% duty cycle low dropout mode
- Internal synchronous rectifier and internal compensation
- Internal soft start and current overload protection
- Thermal shutdown protection
- Support for ADIsimPower™ design tool
Applications
- PDAs and palmtop computers
- Wireless handsets
- Digital audio and portable media players
- Digital cameras and GPS navigation units
Q & A
- What is the input voltage range of the ADP2108?
The input voltage range of the ADP2108 is from 2.3 V to 5.5 V. - What is the maximum load current of the ADP2108?
The maximum load current of the ADP2108 is 600 mA. - What is the fixed frequency of operation for the ADP2108?
The ADP2108 operates at a fixed frequency of 3 MHz. - What is the typical quiescent current of the ADP2108?
The typical quiescent current of the ADP2108 is 18 μA. - What are the package types available for the ADP2108?
The ADP2108 is available in 5-ball WLCSP and 5-lead TSOT packages. - Does the ADP2108 have internal protection features?
Yes, the ADP2108 includes internal protection features such as current overload protection and thermal shutdown protection. - What is the peak efficiency of the ADP2108?
The peak efficiency of the ADP2108 is 95%. - How does the ADP2108 manage power at light loads?
The ADP2108 transitions to a power save mode at light loads, which reduces regulation power losses by entering an idle mode and controlling the output voltage in a hysteretic manner. - What design tool supports the ADP2108?
The ADP2108 is supported by the ADIsimPower™ design tool. - What are some typical applications of the ADP2108?
Typical applications include PDAs, wireless handsets, digital audio and media players, and digital cameras.
