Analog Devices Inc. ADP2302ARDZ-5.0-R7

Overview

ADP2302ARDZ-5.0-R7 from Analog Devices is a fixed-output, nonsynchronous step-down DC/DC regulator delivering up to 2 A at 5.0 V with ±1.5% output accuracy, 700 kHz switching frequency, and integrated high-side MOSFET. It operates from 3.0 V to 20 V input, features power-good signaling, precision enable with hysteresis, and internal soft start-designed for intermediate power rail conversion in industrial and communications systems.

For engineers reviewing the ADP2302ARDZ-5.0-R7 datasheet, ADP2302ARDZ-5.0-R7 pinout, ADP2302ARDZ-5.0-R7 application, or ADP2302ARDZ-5.0-R7 equivalent, key selection criteria include its 2 A load capability, 5.0 V fixed output, SOIC_N_EP package thermal performance (θ_JA = 58.5°C/W), UVLO thresholds (2.2–2.9 V), and PGOOD timing (32 clock cycles).

Technical Context

The ADP2302ARDZ-5.0-R7 uses fixed-frequency current-mode PWM control with automatic transition to pulse-skip mode at light loads, enabling high efficiency across wide load ranges. Its integrated bootstrap diode and 0.1 µF BST–SW capacitor support gate drive for the internal high-side MOSFET, while internal compensation eliminates external loop components.

It implements precision enable with 1.2 V threshold and 100 mV hysteresis, undervoltage lockout (UVLO) with 2.4 V turn-off and 2.7 V turn-on, and thermal shutdown at 150°C with 15°C hysteresis. The device also includes overcurrent protection, overvoltage protection (OVP), and short-circuit recovery via frequency foldback.

Key Specifications

Pinout & Package

ADP2302ARDZ-5.0-R7 is housed in an 8-lead SOIC_N_EP (SOIC narrow with exposed paddle) package. The exposed pad (Pin 9, EPAD) must be soldered to a PCB ground plane for optimal thermal dissipation (θ_JA = 58.5°C/W on JEDEC 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2678SD-5.0/NOPB and TPS54202DDCR, ADP2302ARDZ-5.0-R7 offers superior thermal performance in SOIC_EP packaging, tighter output accuracy (±1.5% vs. ±2%), and optimized 700 kHz operation for minimal inductor volume-making it ideal for thermally constrained industrial and medical applications where predictable startup and sequencing are essential.

Availability

ADP2302ARDZ-5.0-R7 is available at Aetrix Electronics and suitable for industrial PLCs, communications baseband processors, medical sensor hubs, automotive infotainment displays, and instrumentation requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for ADP2302ARDZ-5.0-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 industrial, automotive, communications, and healthcare markets since 1965.

The ADP2302/ADP2303 product line was engineered for compact, high-efficiency intermediate power conversion in space- and thermal-constrained applications-emphasizing integrated power stages, robust protection, and simplified design with ADIsimPower tool support.

FAQ

What is the maximum continuous output current rating for ADP2302ARDZ-5.0-R7?

The ADP2302ARDZ-5.0-R7 is rated for 2 A maximum continuous output current under specified thermal conditions (T_J ≤ 125°C, θ_JA = 58.5°C/W on JEDEC 4-layer board). This rating assumes adequate PCB copper area for the exposed pad and proper input/output capacitor selection. Peak current limit is 2.7–4.4 A depending on BST–SW voltage, but sustained operation above 2 A requires derating based on ambient temperature and airflow.

Does ADP2302ARDZ-5.0-R7 require external feedback resistors?

No, ADP2302ARDZ-5.0-R7 is the fixed 5.0 V output variant and internally connects the FB pin to the regulated output. External resistors are unnecessary and must not be added-doing so would disrupt regulation. Only the adjustable ADP2302ARDZ (no suffix) requires an RTOP/RBOT divider network per Equation 1 in the datasheet.

How does the power-good (PGOOD) function work on ADP2302ARDZ-5.0-R7?

The PGOOD pin on ADP2302ARDZ-5.0-R7 is an open-drain output that goes high when the FB voltage reaches ≥87.5% of the internal 0.8 V reference (i.e., ≥0.7 V), and goes low when FB falls ≤82.5% (≤0.66 V). It includes 32-cycle deglitching (≈46 µs at 700 kHz) to reject noise-induced false triggers, and requires an external pull-up resistor to a voltage ≤20 V for proper logic-level interfacing.

Can ADP2302ARDZ-5.0-R7 operate with a 3.3 V input supply?

Yes, ADP2302ARDZ-5.0-R7 supports input voltages as low as 3.0 V, but achieving stable 5.0 V output at VIN = 3.3 V is impossible due to duty cycle limitation (requires >100% duty cycle). Minimum practical input is ~7 V for 5.0 V output. For low-VIN applications, consider the ADP2302ARDZ-3.3-R7 or use an external bootstrap bias as described in Figure 48 of the datasheet.

What thermal considerations apply to ADP2302ARDZ-5.0-R7 in a sealed enclosure?

In sealed enclosures, ADP2302ARDZ-5.0-R7 relies heavily on PCB copper area under the exposed pad for heat dissipation. With θ_JA = 58.5°C/W on JEDEC 4-layer board, 2 A load at 12 V input generates ~1.2 W dissipation; ambient must stay ≤75°C to keep junction <125°C. Add thermal vias (≥6×0.3 mm) under the EPAD and connect to inner ground planes. Avoid plastic housings trapping heat above the IC surface.