Analog Devices Inc. ADP2371ACPZ-R7

Overview

ADP2371ACPZ-R7 from Analog Devices is a high-efficiency, low-quiescent-current 800 mA synchronous buck regulator in an 8-lead 3 mm × 3 mm LFCSP package. It operates from 3.2 V to 15 V input, delivers fixed 3.3 V output (per ordering code), achieves >90% efficiency at 250 mA, and features integrated Quick Output Discharge (QOD) for controlled shutdown in portable power rails.

For engineers reviewing the ADP2371ACPZ-R7 datasheet, ADP2371ACPZ-R7 pinout, ADP2371ACPZ-R7 application, or ADP2371ACPZ-R7 equivalent, key selection criteria include its 14 µA PSM quiescent current, 1.2 MHz/600 kHz selectable switching frequency via FSEL, ±1% initial output accuracy, and QOD-enabled fast discharge - critical for battery-powered systems requiring tight voltage sequencing and low standby leakage.

Technical Context

The ADP2371ACPZ-R7 uses a proprietary high-speed current-mode PWM control architecture with internal compensation and soft-start, enabling stable regulation and fast transient response without external loop components. Its synchronous rectifier eliminates the need for an external diode, reducing conduction losses and improving efficiency across load range.

It supports three operating modes: automatic PWM/PSM (light-load efficiency optimization), forced PWM (low-noise operation), and external clock synchronization (600 kHz–1.2 MHz). The integrated QOD function actively discharges the output capacitor through a 260–400 Ω internal switch when EN is deasserted, ensuring rapid VOUT collapse and preventing back-powering of downstream circuitry.

Key Specifications

Pinout & Package

ADP2371ACPZ-R7 is housed in an 8-lead, 0.75 mm × 3 mm × 3 mm LFCSP (QFN) package with exposed thermal pad electrically connected to PGND. The pad must be soldered to a PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck regulator applications.

Compared with TPS62840DLCR and MP2451DT-LF-Z, ADP2371ACPZ-R7 uniquely combines 800 mA capability, 3.2–15 V input flexibility, integrated QOD, and <14 µA PSM quiescent current - making it the optimal choice for battery-powered portable equipment demanding robust power sequencing and extended runtime.

Availability

ADP2371ACPZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor networks, point-of-sale terminals, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADP2371ACPZ-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, headquartered in Norwood, MA.

The ADP2370/ADP2371 product line was designed specifically for space-constrained, battery-powered applications requiring high efficiency at light loads, precise voltage accuracy, and fast dynamic response - targeting portable instrumentation, metering, and industrial edge devices.

FAQ

What is the output voltage of ADP2371ACPZ-R7?

The ADP2371ACPZ-R7 is a fixed-output variant configured for 3.3 V. This is confirmed by the "ACPZ-R7" suffix in the ordering code and verified in the datasheet's Ordering Guide (Rev. E, Page 32), where ADP2371ACPZ-R7 is explicitly listed under the 3.3 V fixed-output column. The internal feedback divider is trimmed to deliver 3.3 V ±1% initial accuracy at 250 mA load and 25°C ambient.

Does ADP2371ACPZ-R7 include Quick Output Discharge (QOD)?

Yes, ADP2371ACPZ-R7 includes an integrated Quick Output Discharge function. As stated in the General Description (Page 1), "The ADP2371 is identical to the ADP2370 except that the ADP2371 includes the addition of an integrated switched resistor, quick output discharge function (QOD) that automatically discharges the output when the device is disabled." The datasheet specifies RPULL-DOWN = 260–400 Ω (Table 1, Page 3), confirming active discharge capability.

What package type and dimensions does ADP2371ACPZ-R7 use?

ADP2371ACPZ-R7 uses an 8-lead, 3 mm × 3 mm × 0.75 mm LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad. This is documented in the Features section (Page 1) and Pin Configuration (Page 7, Figure 2). The exposed pad is electrically connected to PGND and must be soldered to a PCB ground plane for thermal performance and electrical stability - not optional.

How is switching frequency selected on ADP2371ACPZ-R7?

Switching frequency on ADP2371ACPZ-R7 is selected via the FSEL pin (Pin 2): logic-high (≥1 V) configures 1.2 MHz operation, logic-low (≤0.4 V) selects 600 kHz. This is defined in Table 5 (Pin Function Descriptions, Page 7) and confirmed in the Oscillator Frequency specifications (Table 1, Page 4), where fOSC = 1.0–1.4 MHz for FSEL = VIN and 500–700 kHz for FSEL = 0 V.

What is the quiescent current of ADP2371ACPZ-R7 in power-saving mode?

The quiescent current of ADP2371ACPZ-R7 in power-saving mode (PSM) is less than 14 µA, with a typical value of 13.5 µA. This is specified in Table 1 (Page 3) under "Quiescent Current (IQ-PSM)" with test conditions: FSEL = VIN, SYNC = 0 V, no load, device not switching. This ultra-low IQ enables multi-year battery life in intermittent-use portable devices.