Analog Devices Inc. ADP5034AREZ-R7

Overview

ADP5034AREZ-R7 from Analog Devices is a dual 3 MHz, 1200 mA buck regulator with two 300 mA low-dropout (LDO) regulators in a single 24-lead 4 mm × 4 mm LFCSP package. It delivers tightly regulated power to core logic and I/O rails of FPGAs and RF chipsets, supports ±1.8% output voltage accuracy, operates across 2.3 V–5.5 V main input and 1.7 V–5.5 V LDO inputs, and enables space-constrained portable medical instrumentation.

For engineers reviewing the ADP5034AREZ-R7 datasheet, ADP5034AREZ-R7 pinout, ADP5034AREZ-R7 application, or ADP5034AREZ-R7 equivalent, this page provides verified technical context, validated pin functions, confirmed dual-buck + dual-LDO architecture, real-world efficiency curves at 3 MHz switching, and precise alternative part comparisons for multi-rail PMIC selection.

Technical Context

The ADP5034AREZ-R7 integrates two synchronous buck converters operating out-of-phase at 2.5–3.5 MHz (typ. 3 MHz) to reduce input ripple and capacitor count, plus two independent LDOs with 60 dB PSRR at 10 kHz and ≤100 µV_rms output noise. Each buck supports forced PWM or auto PWM/PSM mode via the MODE pin, while LDOs maintain <140 mV dropout at 300 mA for 3.3 V outputs.

All four regulators feature dedicated enable pins (EN1–EN4), factory-programmable or externally adjustable outputs (0.8–3.8 V for bucks; 0.8–5.2 V for LDOs), and separate ground paths (AGND, PGND1, PGND2) to isolate analog and power domains-critical for noise-sensitive RF and precision analog subsystems.

Key Specifications

Pinout & Package

ADP5034AREZ-R7 uses a 24-lead, 4 mm × 4 mm LFCSP package with exposed thermal pad (EPAD) recommended for soldering to PCB ground plane. Pin numbering follows top-view die orientation with Pin 1 indicator.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMIC applications.

Compared with ADP5034AREZ-R7, ADP5037ACPZ-R7 offers identical integration but reduced buck current headroom, while TPS65023RSBR provides more LDOs at the cost of non-interchangeable layout and control interface - both require redesign for replacement.

Availability

ADP5034AREZ-R7 is available at Aetrix Electronics and suitable for FPGA power management, RF transceiver housekeeping, portable medical instrumentation, and space-constrained industrial controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADP5034AREZ-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The ADP5034 belongs to Analog Devices' Power Management Unit (PMU) product line, engineered specifically for compact, high-efficiency multi-rail power delivery in portable and noise-sensitive systems such as medical imaging, test equipment, and wireless infrastructure.

FAQ

What is the maximum supported switching frequency of the ADP5034AREZ-R7 buck regulators?

The ADP5034AREZ-R7 buck regulators operate at a nominal switching frequency of 3 MHz, with guaranteed range of 2.5 MHz to 3.5 MHz across temperature and process variation. This high frequency enables use of miniature 1 µH inductors and low-ESR ceramic capacitors, reducing overall solution size without compromising transient response or efficiency.

Does the ADP5034AREZ-R7 support independent enable control for each regulator?

Yes, the ADP5034AREZ-R7 provides four dedicated enable pins - EN1 for BUCK1, EN2 for BUCK2, EN3 for LDO1, and EN4 for LDO2 - allowing full sequencing control. Each pin is active-high with VIH ≥1.1 V and VIL ≤0.4 V, enabling precise power-up/down timing for complex SoC or FPGA systems.

What is the dropout voltage specification for the LDOs in the ADP5034AREZ-R7 at 300 mA load?

At 300 mA load, the ADP5034AREZ-R7 LDOs exhibit 75–140 mV dropout depending on output voltage: 75 mV at 3.3 V output, 100 mV at 2.5 V, and 180 mV at 1.8 V. These values are measured under specified conditions (VIN ≥ VOUT + 0.5 V) and ensure stable regulation even with marginal input headroom in battery-powered applications.

Can the ADP5034AREZ-R7 operate in forced PWM mode across all load conditions?

Yes, the ADP5034AREZ-R7 supports forced PWM mode when the MODE pin is driven high. In this mode, both buck regulators remain in continuous conduction regardless of load current, eliminating frequency variation and output voltage ripple associated with PSM mode - essential for noise-sensitive applications like RF signal chains or high-resolution ADCs.

What package type is used by the ADP5034AREZ-R7 and what is its thermal resistance?

The ADP5034AREZ-R7 uses a 24-lead, 4 mm × 4 mm LFCSP package with exposed thermal pad. Its junction-to-ambient thermal resistance (θ_JA) is 35°C/W under standard JEDEC test conditions, and junction-to-case (θ_JC) is 3°C/W - enabling reliable operation up to +125°C junction temperature with appropriate PCB copper pour and thermal vias.