Analog Devices Inc. ADP5301ACBZ-1-R7

Overview

ADP5301ACBZ-1-R7 from Analog Devices is a high-efficiency, ultralow-quiescent-current step-down regulator in a 9-ball WLCSP package, delivering up to 500 mA in PWM mode or 50 mA in hysteresis mode with only 180 nA no-load IQ. It operates from 2.15 V to 6.50 V input and supports factory-fixed or resistor-programmable output voltages from 0.8 V to 5.0 V. Its VOUTOK flag, 2 MHz switching frequency (synchronizable from 1.5–2.5 MHz), and 100% duty cycle operation make it ideal for battery-powered keep-alive supplies in energy metering and portable medical devices.

For engineers reviewing the ADP5301ACBZ-1-R7 datasheet, ADP5301ACBZ-1-R7 pinout, ADP5301ACBZ-1-R7 application, or ADP5301ACBZ-1-R7 equivalent, this page delivers verified technical context, real-world operating modes, confirmed package mapping, validated pin functions, and two rigorously cross-checked alternative parts - all grounded in Rev. C datasheet specifications and Analog Devices' official documentation.

Technical Context

The ADP5301ACBZ-1-R7 implements dual-mode buck regulation: hysteresis mode enables ultralow 180 nA quiescent current and 50 mA output with large ripple, while PWM mode delivers lower noise, 500 mA output, ±1.5% output accuracy, and fixed 2 MHz switching (synchronizable). Mode selection is controlled via logic level on the SYNC/MODE pin, enabling dynamic power-state adaptation during operation.

It integrates a built-in feedback divider, 0.808 V internal reference, active discharge switch (R_DIS = 290 Ω), and protection features including UVLO (2.06 V rising threshold), OCP (1000 mA typical in PWM), and thermal shutdown (142 °C). The VID pin supports either factory-fused fixed outputs or external resistor-based voltage selection, with FB tied directly to VOUT.

Key Specifications

Pinout & Package

ADP5301ACBZ-1-R7 uses a 9-ball, 1.65 mm × 1.87 mm WLCSP package with bottom-side solder balls. Pin assignment follows standard top-view layout (A1–C3 grid) and is fully validated per Analog Devices Rev. C datasheet Figure 3 and Table 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62745DSSR and MAX17691ATG+T, the ADP5301ACBZ-1-R7 uniquely combines 180 nA hysteresis-mode IQ, 500 mA PWM capability, dual-mode runtime switching, and 2.15 V startup in a 1.65 mm × 1.87 mm WLCSP - making it irreplaceable for long-life, space-constrained, mixed-load battery systems.

Availability

ADP5301ACBZ-1-R7 is available at Aetrix Electronics and suitable for energy metering, portable medical sensors, and industrial IoT edge nodes requiring stable component supply, long-lifecycle assurance, and guaranteed WLCSP packaging integrity.

Supply support for ADP5301ACBZ-1-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, with design centers and manufacturing worldwide.

The ADP5301 belongs to Analog Devices' ultralow-power PMIC family, engineered specifically for battery-operated instrumentation, metering, and medical wearables where multi-year operation and minimal PCB area are critical design constraints.

FAQ

What is the minimum input voltage required for ADP5301ACBZ-1-R7 to start regulation?

The ADP5301ACBZ-1-R7 has a guaranteed input start-up voltage range of 2.15 V to 6.50 V. It can continue operating down to 2.00 V, but will shut down below that threshold due to UVLO activation. This makes ADP5301ACBZ-1-R7 compatible with single Li-ion cells (fully discharged at ~2.5 V) and multi-cell alkaline sources, ensuring reliable cold-start behavior in battery-backed systems.

How does the ADP5301ACBZ-1-R7 achieve 180 nA quiescent current?

The ADP5301ACBZ-1-R7 achieves 180 nA typical quiescent current in hysteresis mode by disabling the high-side and low-side MOSFETs, oscillator, and most internal circuitry during standby - leaving only a minimal bias network active. Its integrated 50 MΩ feedback divider and ultralow-power voltage reference contribute directly to this spec, validated across −40°C to +125°C per Rev. C datasheet Table 1.

Can ADP5301ACBZ-1-R7 operate in both hysteresis and PWM modes simultaneously?

No - the ADP5301ACBZ-1-R7 operates exclusively in one mode at a time, selected by the logic level on the SYNC/MODE pin: logic low enables hysteresis mode (ultralow IQ, 50 mA), logic high enables PWM mode (lower ripple, 500 mA). However, mode switching is permitted dynamically during operation, allowing real-time adaptation to system load and noise requirements without power cycling.

What is the function of the VID pin on ADP5301ACBZ-1-R7?

The VID pin on ADP5301ACBZ-1-R7 configures the output voltage either via an external resistor to AGND (enabling 0.8 V–5.0 V selection per Table 5) or by shorting to PVIN (activating a factory-fused fixed output). The VID code is sampled once during startup and latched - no reconfiguration occurs during operation, ensuring stable rail behavior after power-on.

Does ADP5301ACBZ-1-R7 include overcurrent protection?

Yes - ADP5301ACBZ-1-R7 integrates cycle-by-cycle overcurrent protection (OCP) with a typical 1000 mA current limit in PWM mode and 265 mA peak in hysteresis mode. It also includes short-circuit foldback, reducing switching frequency to ¼ of nominal when FB falls below 0.3 V, preventing thermal runaway during hard shorts - all confirmed in Rev. C datasheet Sections 7 and 14.