Analog Devices Inc. ADP3367ARZ-REEL7

Overview

ADP3367ARZ-REEL7 from Analog Devices is a low-dropout linear voltage regulator delivering up to 300 mA output current with fixed +5 V or adjustable output (1.3 V to 16 V), 150 mV dropout at 200 mA, 17 µA quiescent current in normal mode, and integrated low-battery detection (LBI/LBO) and dropout detector (DD). It serves as a precision power supply for battery-operated handheld instruments and portable equipment.

For engineers reviewing the ADP3367ARZ-REEL7 datasheet, ADP3367ARZ-REEL7 pinout, ADP3367ARZ-REEL7 application, or ADP3367ARZ-REEL7 equivalent, key selection criteria include guaranteed 300 mA load capability, ±2% output accuracy at 5 V, shutdown current <0.75 µA, thermal resistance of 98°C/W in SOIC-8, and dual monitoring outputs (LBO open-drain, DD PNP-source) for system-level power supervision.

Technical Context

The ADP3367ARZ-REEL7 uses a PNP pass transistor architecture enabling ultra-low dropout (15 mV at 100 µA) and high output current while maintaining micropower operation. Its internal 1.255 V bandgap reference feeds an error amplifier whose feedback path is selected via the SET pin-grounded for fixed +5 V or externally biased for adjustable output.

Two on-chip comparators provide independent monitoring: C2 compares LBI against 1.255 V to drive the open-drain LBO output, while the dropout detector (DD) sources current when VIN–VOUT falls below ~300 mV, enabling early regulation loss warning without external components.

Key Specifications

Pinout & Package

ADP3367ARZ-REEL7 is housed in an 8-lead narrow-body SOIC (SOIC_N, R-8) package per JEDEC MS-012-AA, with exposed pad not present and RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with MAX667ACSA+ and TPS76350DBVR, ADP3367ARZ-REEL7 uniquely integrates three supervisory functions (LBO, DD, SHDN) with micropower operation and industry-leading thermal resistance-enabling compact, feature-rich power designs without adding discrete comparators or thermal relief copper.

Availability

ADP3367ARZ-REEL7 is available at Aetrix Electronics and suitable for handheld instruments, cellular IoT modems, and industrial handheld scanners requiring stable component supply, RoHS compliance, and extended temperature support (–40°C to +85°C).

Supply support for ADP3367ARZ-REEL7 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, industrial automation, and communications markets since 1965.

The ADP3367 belongs to Analog Devices' precision LDO regulator family designed specifically for battery-constrained portable systems requiring ultra-low dropout, micropower operation, and integrated power supervision-replacing discrete monitoring solutions with single-chip reliability.

FAQ

What output voltage options does the ADP3367ARZ-REEL7 support?

The ADP3367ARZ-REEL7 supports both fixed +5.0 V output (when SET pin is grounded) and adjustable output from +1.3 V to +16 V (when SET is biased via external resistor divider). The internal 1.255 V reference ensures ±2% accuracy over temperature, and the SET input leakage is limited to ±10 nA-preserving accuracy even with high-value resistors. This dual-mode capability makes ADP3367ARZ-REEL7 suitable for multi-rail designs without changing bill-of-materials.

How does the dropout detector (DD) pin function in the ADP3367ARZ-REEL7?

The DD pin on the ADP3367ARZ-REEL7 is a PNP-source output that begins sourcing current when the input-to-output differential drops below approximately 300 mV, indicating imminent loss of regulation. Under normal operation (VIN–VOUT > 300 mV), DD remains high-impedance. When dropout approaches, DD sources current-typically converted to a voltage signal using a 100 kΩ pull-down resistor-to generate a logic-level warning. This enables predictive power management in ADP3367ARZ-REEL7-based systems without external comparators.

Can the ADP3367ARZ-REEL7 be used with ceramic output capacitors?

Yes, the ADP3367ARZ-REEL7 is stable with ceramic output capacitors ≥10 µF, though the datasheet specifies stability with 10 µF tantalum or aluminum electrolytic types. Ceramic capacitors offer lower ESR and improved transient response, but require attention to DC bias derating-e.g., a 10 µF X7R 16 V ceramic may deliver only ~5 µF at 5 V bias. For robust design, use 22 µF or higher rated ceramics or verify phase margin with actual layout parasitics. ADP3367ARZ-REEL7's internal compensation eliminates need for external ESR zero networks.

What is the maximum allowable power dissipation for the ADP3367ARZ-REEL7 in SOIC-8 package?

The ADP3367ARZ-REEL7 in SOIC-8 (R-8) package has a thermal resistance θ_JA of 98°C/W. At maximum ambient temperature of +85°C and junction limit of +125°C, maximum continuous power dissipation is 408 mW (PD = (125 – 85)/98). This corresponds to ~136 mA at 3 V differential (e.g., 8 V IN → 5 V OUT). Derating is required above +50°C ambient; the datasheet specifies 10 mW/°C reduction beyond +50°C. Exceeding this limit risks thermal shutdown or accelerated parametric drift in ADP3367ARZ-REEL7 operation.

Does the ADP3367ARZ-REEL7 require an input capacitor?

The ADP3367ARZ-REEL7 does not require an input capacitor for stability, but one is strongly recommended for dynamic performance. A 1 µF ceramic capacitor placed close to the IN and GND pins suppresses line transients and reduces noise coupling-especially critical when powered from switching converters or long PCB traces. Without it, step changes in input voltage (e.g., Figure 6 shows 50 mV disturbance for 10 V → 6 V step) may cause larger output excursions. Input capacitance has no effect on ADP3367ARZ-REEL7's internal regulation loop stability.