Analog Devices Inc. ADP5301ACBZ-4-R7

Overview

ADP5301ACBZ-4-R7 from Analog Devices is a high-efficiency, ultralow-quiescent-current step-down regulator in 9-ball WLCSP packaging, delivering up to 500 mA in PWM mode or 50 mA in hysteresis mode with 180 nA no-load IQ, ±1.5% output accuracy, and 2 MHz switching frequency - ideal for battery-powered keep-alive supplies in energy metering and portable medical devices.

For engineers reviewing the ADP5301ACBZ-4-R7 datasheet, ADP5301ACBZ-4-R7 pinout, ADP5301ACBZ-4-R7 application, or ADP5301ACBZ-4-R7 equivalent, this page delivers verified technical context, validated pin functions, confirmed operating modes (PWM/hysteresis), real-world efficiency curves, and two rigorously cross-checked alternative regulators for low-power DC/DC design.

Technical Context

The ADP5301ACBZ-4-R7 integrates dual-mode buck regulation: hysteresis mode enables 180 nA quiescent current and 50 mA output with large ripple, while PWM mode delivers 500 mA output, 2 MHz fixed-frequency operation (synchronizable 1.5–2.5 MHz), and ±1.5% output accuracy over −40°C to +125°C. Mode selection is controlled via logic level on the SYNC/MODE pin.

It features factory-programmable VID-based output voltage (0.8 V to 5.0 V), internal 0.808 V feedback reference, integrated high-side (470 mΩ max) and low-side (320 mΩ max) FETs, VOUTOK open-drain power-good flag, and protection including UVLO (2.06 V rising threshold), OCP (1000 mA typical in PWM), and thermal shutdown (142°C).

Key Specifications

Pinout & Package

ADP5301ACBZ-4-R7 uses a 9-ball, 1.65 mm × 1.87 mm WLCSP package with bottom-side solder balls. Pin mapping follows standard top-view grid (A1–C3), with AGND and PGND electrically isolated for noise-sensitive analog feedback paths.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62840DRLR and MAX17222ETA+T, ADP5301ACBZ-4-R7 uniquely combines dual-mode operation, resistor-programmable VID, and VOUTOK flag in a 1.65 mm × 1.87 mm WLCSP - making it optimal for space-constrained, battery-life-critical systems requiring both ultra-low IQ and programmable flexibility.

Availability

ADP5301ACBZ-4-R7 is available at Aetrix Electronics and suitable for energy metering, portable medical devices, and industrial sensor nodes requiring stable component supply, long-lifecycle support, and guaranteed traceability for ISO 13485 and IEC 62366 compliance.

Supply support for ADP5301ACBZ-4-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 R&D and manufacturing operations worldwide.

The ADP5301 product line targets ultra-low-power, space-constrained battery-operated systems - specifically engineered to replace discrete LDO + supervisor combinations with a single integrated buck regulator offering programmable voltage, dual operating modes, and comprehensive protection.

FAQ

What is the minimum input voltage required for ADP5301ACBZ-4-R7 to start regulation?

The ADP5301ACBZ-4-R7 has an input start-up voltage range of 2.15 V to 6.50 V. It begins regulation once PVIN rises above 2.06 V (typical UVLO rising threshold), followed by soft start initiation. Below 2.00 V, the device remains disabled - ensuring clean power-up behavior across alkaline, NiMH, and Li-ion battery discharge profiles.

How does ADP5301ACBZ-4-R7 achieve 180 nA quiescent current in hysteresis mode?

The ADP5301ACBZ-4-R7 achieves 180 nA typical quiescent current in hysteresis mode by disabling the high-side and low-side MOSFETs and most internal circuitry during standby periods, leaving only essential bias and comparator blocks active. This architecture minimizes static current while allowing rapid wake-up when output voltage falls below the hysteresis lower threshold.

Can ADP5301ACBZ-4-R7 operate with a precharged output capacitor?

Yes, ADP5301ACBZ-4-R7 includes a dedicated precharged-startup feature. When the output is precharged before EN goes high, the regulator inhibits reverse inductor current until the internal soft-start reference exceeds the FB voltage - preventing damage to the low-side FET and avoiding uncontrolled discharge of the output capacitor.

What is the function of the VID pin on ADP5301ACBZ-4-R7, and how is it configured?

The VID pin on ADP5301ACBZ-4-R7 configures output voltage via an external resistor to AGND (e.g., 11.8 kΩ for 1.2 V) or factory fuse programming. During startup, the VID voltage is sampled and latched; the internal feedback divider is fixed, so FB must connect directly to VOUT. This eliminates external resistors and associated leakage errors.

Does ADP5301ACBZ-4-R7 support synchronization to an external clock, and what is the valid frequency range?

Yes, ADP5301ACBZ-4-R7 supports external clock synchronization via the SYNC/MODE pin. The valid input clock frequency range is 1.5 MHz to 2.5 MHz. The device automatically detects and locks to the external clock; if the clock stops, it seamlessly reverts to its internal 2 MHz oscillator without output disruption.