ADP2125
Low Profile, 500 mA, 6 MHz, Synchronous Step-Down, DC-to-DC Converter
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Overview
Features and Benefits
- 1.26 V fixed output voltage
- Clock signal enable
- 6 MHz (maximum) operating frequency
- 500 mA continuous output current
- Input voltage: 2.1 V to 5.5 V
- 0.3 μA (typical) shutdown supply current
- Compatible with tiny multilayer inductors
- Internal synchronous rectifier
- Internal compensation
- Internal soft start
- Output to ground short-circuit protection
- Current-limit protection
- See data sheet for additional features
Product Details
The ADP2125 is a high frequency, step-down, dc-to-dc converter optimized for portable applications in which board area and battery life are critical constraints. Fixed frequency operation at 6 MHz enables the use of tiny ceramic inductors and capacitors. Additionally, the synchronous rectification improves efficiency and results in fewer external components. Over all load currents, the device uses a voltage regulating pulse-width modulation (PWM) mode that maintains a constant frequency with excellent stability and transient response. The ADP2125 is enabled by a 6 MHz to 27 MHz external clock signal applied to the EXTCLK pin. When the external clock is not switching and in a low state (EXTCLK ≤ 0.5 V), the input is disconnected from the output and draws less than 0.3 μA (typical) from the source.
The ADP2125 has an input voltage range of 2.1 V to 5.5 V, allowing the use of single Li+/Li polymer cell, three-cell alkaline, NiMH cell, and other standard power sources. The ADP2125 is internally compensated to minimize external components and can source up to 500 mA. Other key features such as cycle-by-cycle peak current limit, soft start, undervoltage lockout (UVLO), output-to-ground short-circuit protection, and thermal shutdown provide protection for internal and external circuit components.
APPLICATIONS
- Mobile phones
- Digital still/video cameras
- Digital audio
- Portable equipment
- Camera modules
- Image stabilization systems
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Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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UG-198: Evaluating the ADP2125 Low Profile, 6 MHz, Step-Down Converter11/1/2010PDF114 kB
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| ADP2125BCDZ-1.26R7 | Material Declaration | Reliability Data | BUMPED BARE DIE SALES | |
| Wafer Fabrication Data |
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