ADP2503 600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter

The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count. At high load currents, the ADP2503/ADP2504 use a current-mode, fixed frequency pulse-width modulation (PWM) control scheme for optimal stability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504 have an optional power save mode that reduces the switching frequency under light load conditions. For wireless and other low noise applications where variable frequency power save mode may cause interference, the logic control input sync forces fixed frequency PWM operation under all load conditions. The ADP2503/ADP2504 can run from input voltages between 2.3 V and 5.5 V, allowing single lithium or lithium polymer cell, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The ADP2503/ADP2504 have fixed output options, or using the adjustable model, the output voltage can be programmed through an external resistor divider. Compensation is internal to minimize the number of external components. During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Operating as boost converters, the ADP2503/ADP2504 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup. Applications Wireless handsets Digital cameras/portable audio players Miniature hard disk power supplies USB powered devices Data Sheet, Rev. A, 08/09

During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Operating as boost converters, the ADP2503/ADP2504 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup.

Applications

Data Sheet, Rev. A, 08/09

Features and Benefits
  • 1 mm height profile
  • Compact PCB footprint
  • Seamless transition between modes
  • 38 μA typical quiescent current
  • 2.5 MHz operation enables 1.5 μH inductor
  • Input voltage: 2.3 V to 5.5 V
  • Fixed output voltage: 2.8 V to 5.0 V
  • See data sheet for additional features
Power Management
Design Tools
Reference Designs
Data Sheets
Documentnote
ADP2503/ADP2504: 600 mA/1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converters Data Sheet (Rev. D)PDF 1623 kB
Application Notes
Documentnote
AN-1149: How to Apply DC-to-DC Step-Down/Step-Up (Buck/Boost) Regulators (Rev. 0)PDF 172 kB
User Guides
Documentnote
UG-060: Evaluation Board for the ADP2503/ADP2504, 600 mA/1000 mA, 2.5 MHz Buck-Boost DC-to-DC ConvertersPDF 986 kB
UG-028: RedyKit™ for the ADP2503 Buck-Boost ConverterPDF 191 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADP2503ACPZ-2.8-R7 Last Time Buy10 ld LFCSP (3x3mm)REEL 1500-40 to 125C01.3Y
ADP2503ACPZ-3.3-R7 Production10 ld LFCSP (3x3mm)REEL 1500-40 to 125C01.3Y
ADP2503ACPZ-3.5-R7 Last Time Buy10 ld LFCSP (3x3mm)REEL 1500-40 to 125C01.3Y
ADP2503ACPZ-4.2-R7 Production10 ld LFCSP (3x3mm)REEL 1500-40 to 125C01.3Y
ADP2503ACPZ-4.5-R7 Production10 ld LFCSP (3x3mm)REEL 1500-40 to 125C01.3Y
ADP2503ACPZ-5.0-R7 Production10 ld LFCSP (3x3mm)REEL 1500-40 to 125C01.3Y
ADP2503ACPZ-R7 Production10 ld LFCSP (3x3mm)REEL 1500-40 to 125C01.3Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
ADP2503CPZ-REDYKITEvaluation Board120Y
ADP2503-EVALZEvaluation Board60Y
Reference Materials
ADP2503/ADP2504: 600 mA/1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converters Data Sheet (Rev. D) adp2503
ADP2503/ADP2504: 600 mA/1000mA,2.5 MHz降压-升压式DC-DC转换器 (Rev. 0) adp2503
ADP2503/4 Buck Boost Regulator Design Tool adp2503
CN0234 设计和集成文件 adp2503
AN-1149: How to Apply DC-to-DC Step-Down/Step-Up (Buck/Boost) Regulators (Rev. 0) adp2503
UG-060: Evaluation Board for the ADP2503/ADP2504, 600 mA/1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converters adp2503
UG-028: RedyKit™ for the ADP2503 Buck-Boost Converter adp2503
CN-0234:使用电化学传感器的单电源、微功耗有毒气体探测器 adp2503
When Every μA Counts! adpd174ggi