Analog Devices Inc. ADP2164ACPZ-2.5-R7

Overview

ADP2164ACPZ-2.5-R7 from Analog Devices is a 4 A, synchronous step-down DC-to-DC regulator in a 4 mm × 4 mm LFCSP package, delivering fixed 2.5 V output with ±1.5% accuracy across −40°C to +125°C. It operates from 2.7 V to 6.5 V input, supports 600 kHz or 1.2 MHz fixed switching frequency, and integrates 43 mΩ high-side and 29 mΩ low-side MOSFETs for high efficiency in point-of-load applications.

For engineers reviewing the ADP2164ACPZ-2.5-R7 datasheet, ADP2164ACPZ-2.5-R7 pinout, ADP2164ACPZ-2.5-R7 application, or ADP2164ACPZ-2.5-R7 equivalent, key selection considerations include its fixed 2.5 V output, integrated power FETs, precision enable threshold (1.2 V typ), power-good output, and voltage tracking capability for multi-rail sequencing.

Technical Context

The ADP2164ACPZ-2.5-R7 uses a current-mode PWM control architecture with slope compensation to ensure stability at duty cycles ≥50%. Its internal 0.6 V reference and feedback loop regulate output precisely, while the 100% duty cycle capability enables low-dropout operation under full 4 A load.

It features synchronized switching with selectable 0° or 180° phase shift via RT pin configuration, precision EN input with 100 mV hysteresis, and comprehensive protection including UVLO (2.5 V falling), OVP (0.66 V FB threshold), OCP (6.2 A peak limit), and thermal shutdown at 140°C with 15°C hysteresis.

Key Specifications

Pinout & Package

ADP2164ACPZ-2.5-R7 is housed in a thermally enhanced 16-lead, 4 mm × 4 mm LFCSP package with exposed pad (EPAD) soldered to PCB ground for optimal thermal dissipation (θ_JA = 38.3°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Compared with TPS54332DR and MP2315GJ-Z, ADP2164ACPZ-2.5-R7 delivers fixed 2.5 V output with integrated TRK and PGOOD-reducing component count by 3–5 parts and eliminating external sequencing logic in multi-rail systems.

Availability

ADP2164ACPZ-2.5-R7 is available at Aetrix Electronics and suitable for FPGA power delivery, DDR memory termination, industrial sensor biasing, and automotive infotainment subsystems requiring stable component supply across extended temperature and long production lifecycles.

Supply support for ADP2164ACPZ-2.5-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 ADP2164 product line delivers compact, high-efficiency synchronous buck regulators optimized for point-of-load conversion in space- and thermal-constrained applications such as portable computing, networking infrastructure, and automotive electronics.

FAQ

What is the output voltage tolerance of the ADP2164ACPZ-2.5-R7 over temperature and load?

The ADP2164ACPZ-2.5-R7 maintains ±1.5% output voltage accuracy across the full operating junction temperature range (−40°C to +125°C) and full 0–4 A load range. This specification is guaranteed by design and verified per Table 1 in the Rev. D datasheet, ensuring stable 2.5 V regulation for sensitive digital loads without external trimming.

Does the ADP2164ACPZ-2.5-R7 require external feedback resistors?

No, the ADP2164ACPZ-2.5-R7 is a fixed-output variant with internal resistor divider set to 2.5 V; the FB pin is internally connected and not accessible for external adjustment. This eliminates layout sensitivity, reduces component count, and improves noise immunity compared to adjustable versions like ADP2164ACPZ-R7.

Can the ADP2164ACPZ-2.5-R7 synchronize to an external clock, and what phase options are supported?

Yes, the ADP2164ACPZ-2.5-R7 accepts external synchronization via the SYNC pin across 500 kHz–1.4 MHz. Phase alignment depends on the RT pin state: when RT is tied to GND or a resistor, switching is in phase with the external clock; when RT is tied to VIN, switching is 180° out of phase-enabling interleaved operation to reduce input ripple.

What thermal performance can be expected from the ADP2164ACPZ-2.5-R7 in a standard 4-layer PCB layout?

With the exposed pad soldered to a 2-in² copper pour using ≥6 thermal vias, the ADP2164ACPZ-2.5-R7 achieves θ_JA = 38.3°C/W. At 4 A output and 5 V input, typical power dissipation is ~0.5 W, resulting in ~20°C rise above ambient-well below the 140°C thermal shutdown threshold under natural convection.

How does the ADP2164ACPZ-2.5-R7 handle startup into a precharged output capacitor?

The ADP2164ACPZ-2.5-R7 includes dedicated circuitry to detect precharged output voltage and inhibit reverse inductor current during soft start. When enabled, it holds the low-side FET off until the internal soft-start voltage exceeds the FB voltage, preventing output capacitor discharge and ensuring controlled ramp-up even during hot-swap conditions.