Analog Devices Inc. ADP2300AUJZ-R7

Overview

ADP2300AUJZ-R7 from Analog Devices is a nonsynchronous step-down DC-DC regulator with integrated high-side MOSFET, delivering up to 1.2 A load current at ±2% output voltage accuracy, operating from 3.0 V to 20 V input, and switching at 700 kHz for compact power conversion in space-constrained digital load applications.

For engineers reviewing the ADP2300AUJZ-R7 datasheet, ADP2300AUJZ-R7 pinout, ADP2300AUJZ-R7 application, or ADP2300AUJZ-R7 equivalent, key selection considerations include its fixed 700 kHz switching frequency, internal soft start (1460 µs), precision enable threshold (1.2 V), integrated bootstrap diode, and TSOT-6 package compatibility with low-profile PCB layouts.

Technical Context

The ADP2300AUJZ-R7 employs peak current-mode PWM control with automatic transition to pulse-skip mode at light loads, enabling stable line/load transient response and high efficiency (up to 91%) across 0.8 V–0.85×VIN output range. Its internal compensation, slope compensation, and fixed-frequency operation eliminate external loop components while supporting duty cycles >50% without subharmonic oscillation.

Integrated protection includes undervoltage lockout (UVLO rising 2.95 V, falling 2.40 V), thermal shutdown (140°C with 15°C hysteresis), overcurrent protection via peak current limiting (1.5–2.5 A), and short-circuit foldback (¼ fSW when FB ≤ 0.2 V). The BST-SW bootstrap circuit generates ~5.0 V gate drive using an external 0.1 µF ceramic capacitor.

Key Specifications

Pinout & Package

ADP2300AUJZ-R7 is housed in a 6-lead TSOT package (2.9 mm × 1.6 mm × 0.85 mm), optimized for thermal performance (θ_JA = 186°C/W) and high-density layouts. The ultrasmall footprint supports automated assembly and minimal board area usage.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADP2300AUJZ-R7, ADP2301AUJZ-R7 offers faster transient response and smaller passive components due to doubled frequency, while TPS562201DDCR delivers higher current and better light-load efficiency via synchronous topology-but both require layout and compensation revalidation.

Availability

ADP2300AUJZ-R7 is available at Aetrix Electronics and suitable for communications infrastructure, industrial sensor nodes, and portable medical devices requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADP2300AUJZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.

The ADP2300/ADP2301 product line delivers compact, integrated step-down regulators targeting space- and efficiency-sensitive applications where simplicity, reliability, and wide input range are critical-especially in digital load replacement and intermediate rail conversion.

FAQ

What is the maximum input voltage rating for the ADP2300AUJZ-R7?

The ADP2300AUJZ-R7 has an absolute maximum input voltage rating of +28 V, but its operational input voltage range is specified from 3.0 V to 20 V. Exceeding 20 V may cause undefined behavior or damage, even if below the absolute maximum, because internal circuitry (e.g., UVLO, bootstrap regulator) is characterized only within the 3.0–20 V range. Always maintain VIN ≤ 20 V during normal operation to ensure compliance with datasheet specifications and reliability targets.

Does the ADP2300AUJZ-R7 require an external catch diode?

Yes, the ADP2300AUJZ-R7 requires an external Schottky catch diode connected from the SW pin to GND. As a nonsynchronous buck regulator, it lacks an integrated low-side FET; the diode provides the return current path during the high-side MOSFET's off-time. Recommended diodes include B230A (30 V, 2 A) or equivalents with low forward voltage (<0.45 V) and fast recovery to minimize conduction losses and maintain efficiency above 85% at full load.

How is the output voltage set on the ADP2300AUJZ-R7?

The ADP2300AUJZ-R7 output voltage is set externally using a resistive divider from VOUT to the FB pin, configured to develop exactly 0.800 V at FB across temperature. For example, a 3.3 V output uses R_FB1 = 31.6 kΩ and R_FB2 = 10.2 kΩ (±1%). The formula is V_OUT = 0.800 × (1 + R_FB1/R_FB2). The FB pin draws only 0.01–0.1 µA, so divider current can be kept low (e.g., 10–100 µA) to minimize power loss without affecting regulation accuracy.

What protection features are built into the ADP2300AUJZ-R7?

The ADP2300AUJZ-R7 integrates undervoltage lockout (UVLO), overcurrent protection (OCP), thermal shutdown (TSD), and short-circuit foldback. UVLO disables operation below 2.4 V (falling) and re-enables above 2.95 V (rising). OCP limits peak switch current to 1.5–2.5 A. TSD triggers at 140°C with 15°C hysteresis. Short-circuit foldback reduces switching frequency to ¼ fSW when FB ≤ 0.2 V, limiting average output current and enabling safe recovery after fault removal.

Can the ADP2300AUJZ-R7 operate with an input voltage below 3.0 V?

No, the ADP2300AUJZ-R7 is not specified to operate reliably below 3.0 V input. Its functional input range begins at 3.0 V per the datasheet's "Voltage Range" specification, and internal circuits-including the bootstrap regulator and error amplifier-require ≥3.0 V to achieve guaranteed performance (e.g., 1.2 A output, ±2% regulation, proper UVLO release). Attempting operation below 3.0 V may result in failure to start, unstable regulation, or undefined enable behavior, even if the absolute maximum rating (−0.3 V) is not violated.