ADP5134

Data Sheet Dual 3 MHz, 1200 mA Buck Regulators and Two 300 mA LDO Regulators With Precision Enable and Power-Good Output ADP5134 FEATURES Main input voltage range of 2.5 V to 5.5 V Two 1200 mA buck regulators and two 300 mA LDO regulators 24-lead, 4 mm × 4 mm LFCSP package Regulator accuracy of ±1.8% Factory programmable or external adjustable VOUTx Precision enable pins for easier power sequencing Factory selectable power-good pin 3 MHz buck operation with forced PWM and automatic PWM/PSM modes BUCK1/BUCK2: output voltage range from 0.8 V to 3.8 V LDO1/LDO2: output voltage range from 0.8 V to 5.2 V LDO1/LDO2: input voltage range from 1.7 V to 5.5 V LDO1/LDO2: high PSRR and low output noise 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 GENERAL DESCRIPTION The ADP5134 combines two high performance buck regulators and two low dropout (LDO) regulators. 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 when the load is above a predefined threshold. When the load current falls below a predefined thr...