Analog Devices Inc. ADP5138ACPZ-2-R7

Overview

ADP5138ACPZ-2-R7 from Analog Devices is a quad synchronous step-down regulator PMIC with an additional RF LDO regulator. The device is designed for compact processor, RF, and mixed-signal systems that need four efficient 1A buck rails plus a clean auxiliary LDO rail from a 5.5V-class input.

As part of the ADP5138 product family, ADP5138ACPZ-2-R7 integrates four 1A buck converters, one RF LDO, 3MHz switching operation, I2C control, power-good indication, interrupt signaling, and suffix-defined output options. For engineers reviewing the ADP5138ACPZ-2-R7 datasheet, ADP5138ACPZ-2-R7 pinout, ADP5138ACPZ-2-R7 application, or ADP5138ACPZ-2-R7 equivalent, this device is widely used in RF transceivers, application processors, portable instrumentation, wireless modules, FPGA support rails, and compact multi-rail embedded systems.

Technical Context

In portable RF and processor systems, ADP5138ACPZ-2-R7 operates as a high-density PMIC that supplies four switching rails for digital loads while the RF LDO provides a cleaner low-noise rail for sensitive circuitry.

Each synchronous buck regulator can provide up to 1A, allowing the device to power several moderate-current subsystems without using separate DC-DC ICs. The 3MHz switching frequency supports small inductors and capacitors, reducing solution area around dense processors or RF devices.

ADP5138ACPZ-2-R7 is commonly used where I2C control, interrupt reporting, power-good monitoring, and multiple 1A rails are required in a compact LFCSP power solution.

Key Specifications

Pinout & Package

The ADP5138ACPZ-2-R7 pinout includes four buck input and switch nodes, RF LDO input/output pins, I2C control pins, power-good/interrupt pins, enable controls, and exposed-pad ground.

For PCB design, each buck inductor and capacitor should be placed close to its switch node, I2C lines should be kept away from switching copper, and the RF LDO output should be routed as a quiet rail.

Key Features

• Four 1A synchronous buck regulators support multiple rails.
• RF LDO provides a clean auxiliary output.
• 3MHz switching reduces passive component size.
• I2C interface supports software-controlled power management.
• Power-good and interrupt functions support supervision.
• Compact LFCSP package supports dense RF and processor boards.

Applications

Equivalent & Alternatives

When evaluating a ADP5138ACPZ-2-R7 equivalent, engineers should compare number of buck regulators, output current, RF LDO need, I2C control, package, interrupt/power-good behavior, and output-voltage option.

Compared with ADP5134ACPZ-R7, ADP5138ACPZ-2-R7 provides four 1A buck regulators and an RF LDO for dense RF or processor power. ADP5138ACPZ-2-R7 vs LP873347RHDR selection depends on buck count, LDO needs, I2C control, package, and output-current budget.

Quality

ADP5138ACPZ-2-R7 should be sourced as original Analog Devices components through traceable supply channels. Quality checks may include LFCSP inspection, top-mark validation, solderability testing, and five-output electrical verification.

Production validation should include I2C communication, power-good and interrupt behavior, buck load transients, RF LDO noise, thermal performance, and output-voltage configuration checks.

Availability

ADP5138ACPZ-2-R7 available at Aetrix Electronics and is suitable for RF, wireless, processor, FPGA, and compact embedded systems requiring quad-buck PMIC supply support.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming output configuration, package, rail-current budget, I2C software behavior, lifecycle status, and sourcing continuity helps reduce procurement risk.

Manufacturer

Analog Devices is a global semiconductor manufacturer specializing in analog ICs, power management, mixed-signal products, data converters, RF solutions, sensors, and embedded signal-chain technologies for industrial, communication, automotive, healthcare, and consumer applications.

The ADP5138 product family is an Analog Devices quad synchronous step-down regulator PMIC series with an RF LDO for RF, processor, and compact multi-rail embedded systems.

FAQ

What is ADP5138ACPZ-2-R7 used for?

ADP5138ACPZ-2-R7 is used for RF transceivers, processors, wireless modules, FPGA support rails, and compact multi-rail embedded systems.

Where can I find the ADP5138ACPZ-2-R7 datasheet download?

The ADP5138ACPZ-2-R7 datasheet is available from Analog Devices and includes regulator ratings, I2C behavior, package information, and application circuits.

What should be considered in ADP5138ACPZ-2-R7 pinout design?

Designers should separate the four switching loops, route I2C away from switch nodes, and keep the RF LDO output quiet.

How many buck regulators does ADP5138ACPZ-2-R7 include?

It includes four synchronous step-down regulators, each rated up to 1A.

What are common ADP5138ACPZ-2-R7 equivalent solutions?

Common candidates include ADP5134ACPZ-R7 and LP873347RHDR depending on rail count, LDO requirements, I2C control, and package.