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 DetailsThe 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.
- Mobile phones
- Digital still/video cameras
- Digital audio
- Portable equipment
- Camera modules
- Image stabilization systems
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)
The ADP2125 evaluation board is a complete 6 MHz (maximum), low quiescent current, synchronous buck dc-to-dc converter capable of producing up to 500 mA of output current at a fixed 1.26 V output voltage. The converter operates with an input voltage in the 2.1 V to 5.5 V range. The device uses a voltage regulating pulse-width modulation (PWM) that maintains a constant frequency with excellent stability and transient response. The evaluation board demonstrates the operation and performance of the ADP2125 as well as its compatibility with tiny ceramic components for a small area solution.
Tools & Simulations
ADIsimPower is the fastest and most accurate Power Management design tool. ADI's Design Center lets you design your power circuits in three easy steps.
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.