ADP5134:  Dual 3 MHz, 1200 mA Buck Regulators and Two 300 mA LDO Regulators With Precision Enable and Power-Good Output

Product Details

Product Status:Recommended for New Designs

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 threshold, the regulator operates in power save mode (PSM), improving the light load efficiency.

The two buck regulators operate out of phase to reduce the input capacitor requirement. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP5134 LDO regulators extend the battery life of portable devices. The ADP5134 LDO regulators maintain power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage of 500 mV.

Regulators in the ADP5134 are activated through dedicated enable pins. The default output voltages can be externally set in the adjustable version or factory programmable to a wide range of preset values in the fixed voltage version.


  • 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


  • 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

Typical Application Circuit Diagram for ADP5134

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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.

ADP5134 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADP5134CP-EVALZ Status: Production Evaluation Board $49.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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