ADP51B63

GENERAL DESCRIPTIONThe ADP5135 combines three high performance buck regulators (BUCK1, BUCK2, and BUCK3). It is available in a 24-lead, 4 mm × 4 mm LFCSP.The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set to high, the buck regulators operate in forced pulse-width modulation (PWM) mode. When the MODE pin is set to low, the buck regulators operate in PWM mode only when the load is above a predefined threshold. When the load current falls below this predefined threshold, the regulator operates in power save mode (PSM), improving the light load efficiency.FEATURES Input voltage range: 3.0 V to 5.5 V Three 1800 mA buck regulators 24-lead, 4 mm × 4 mm LFCSP package Regulator accuracy: ±1.8% Factory programmable or external adjustable VOUTx pins Precision enables for easier power sequencing Power-good pins for monitoring each regulator 3 MHz buck operation with forced PWM and auto PWM/PSM modes BUCK1/BUCK2/BUCK3: output voltage range from 0.8 V to 3.8 V APPLICATIONS Power for processors, application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and radio frequency (RF) chipsets Portable instrumentation and medical devices Space constrained devices

主要特徵

• 1. Contains built-in amplification and
• temperature compensation circuit.
• Circuit design and adjustment of
• characteristics are not required by
• users.
• 2. High-level precision and high
• reliability realized.
• Overall accuracy is ±1.25% FS
• (Standard type)
• Overall accuracy is ±4% FS
• (Economy type)
• Overall accuracy is ±2.5% FS
• (Low pressure type)
• 3. Compact pressure sensor unit that
• saves space.
• Same size and as previous PS pressure
• sensor. (Standard/Economy type, S and
• M Packages)