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ADP2127-1.26-EVALZ Datasheet(PDF) 1 Page - Analog Devices |
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ADP2127-1.26-EVALZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 20 page Ultralow Profile, 500 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converters ADP2126/ADP2127 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. FEATURES 1.20 V and 1.26 V fixed output voltage options Clock signal enable Logic signal enable also available on certain models 6 MHz operating frequency Spread spectrum frequency modulation to reduce EMI 500 mA continuous output current Input voltage: 2.1 V to 5.5 V 0.3 μA (typical) shutdown supply current Pin-selectable power-saving mode Compatible with tiny multilayer inductors Internal synchronous rectifier Internal compensation Internal soft start Output-to-ground short-circuit protection Current-limit protection Undervoltage lockout Thermal shutdown protection 0.330 mm height (maximum), 6-ball BUMPED_CHIP (ADP2126) 0.200 mm height (maximum), 6-pad EWLP (ADP2127) APPLICATIONS Mobile phones Digital still/video cameras Digital audio Portable equipment Camera modules Image stabilization systems TYPICAL APPLICATION CIRCUITS A2 C2 B2 A1 B1 C1 VIN GND FB SW EXTCLK MODE CIN 2.2µF COUT 2.2µF INPUT VOLTAGE 2.1V TO 5.5V L 1.0µH ADP2126 OUTPUT VOLTAGE 1.20V OR 1.26V OFF ON OFF ON AUTO PWM OR *LOGIC HIGH ENABLE IS ONLY AVAILABLE ON CERTAIN MODELS. * Figure 1. ADP2126 0.33 mm Maximum Height Solution A2 C2 B2 A1 B1 C1 VIN GND FB SW EXTCLK MODE INPUT VOLTAGE 2.1V TO 5.5V L 0.56µH ADP2127 OUTPUT VOLTAGE 1.20V OR 1.26V OFF ON OFF ON AUTO PWM OR COUT 2 × 1µF CIN 2 × 1µF *LOGIC HIGH ENABLE IS ONLY AVAILABLE ON CERTAIN MODELS. * Figure 2. ADP2127 0.22 mm Maximum Height Solution GENERAL DESCRIPTION The ADP2126/ADP2127 are high frequency, step-down, dc-to- dc converters optimized for portable applications in which board area and battery life are critical constraints. The fixed 6 MHz operating frequency enables the use of tiny ceramic inductors and capacitors and the regulators use spread spectrum frequency modulation to reduce EMI. Additionally, synchronous rectification improves efficiency and results in fewer external components. At high load currents, the ADP2126/ADP2127 use a voltage regulating pulse-width modulation (PWM) mode that maintains a constant frequency with excellent stability and transient response. Light load operation is determined by the state of the MODE pin. In forced PWM mode, the converter continues operating in PWM for light loads. Under light load conditions in auto mode, the ADP2126/ADP2127 automatically enter a power-saving mode, which uses pulse frequency modulation (PFM) to reduce the effective switching frequency, thus ensuring the longest battery life in portable applications. The ADP2126/ADP2127 are enabled by a 6 MHz to 27 MHz external clock signal applied to the EXTCLK pin. Certain models can also be enabled with a logic high signal. When the external clock is not switching and in a low logic state, the ADP2126/ADP2127 stop regulating and shut down to draw less than 0.3 μA (typical) from the source. The ADP2126/ADP2127 have 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 ADP2126/ADP2127 are 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. |
Similar Part No. - ADP2127-1.26-EVALZ |
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Similar Description - ADP2127-1.26-EVALZ |
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