Analog Devices Inc. ADP5302ACPZ-2-R7

Overview

ADP5302ACPZ-2-R7 from Analog Devices is an ultralow-power, dual-mode step-down regulator with integrated battery voltage monitor (VINOK), 240 nA quiescent current in hysteresis mode, ±1.5% output accuracy in PWM mode, and selectable 0.8 V to 5.0 V output via VID resistor or factory fuse - designed for keep-alive power in gas/water metering and portable medical sensors.

For engineers reviewing the ADP5302ACPZ-2-R7 datasheet, ADP5302ACPZ-2-R7 pinout, ADP5302ACPZ-2-R7 application, or ADP5302ACPZ-2-R7 equivalent, this page delivers verified technical context, real-world operating modes (hysteresis vs. PWM), VINOK threshold programmability, STOP pin noise suppression capability, and validated alternative options for low-I_Q buck regulation in battery-constrained systems.

Technical Context

The ADP5302ACPZ-2-R7 implements a synchronous buck topology with two distinct operational modes: hysteresis mode (240 nA I_Q, up to 50 mA load, large ripple) and PWM mode (425 µA I_Q, up to 500 mA load, 2 MHz fixed/externally synchronized switching). Mode selection is controlled by logic level on the multifunction SYNC/MODE pin.

It integrates a factory-programmable VINOK comparator (threshold range 2.05 V–5.15 V, ±3% accuracy over −40°C to +125°C), STOP pin for instantaneous switching disable (10 ns rise delay), and internal feedback divider enabling direct FB-to-VOUT connection - eliminating external resistors while maintaining 0.8 V–5.0 V output configurability via VID resistor or fuse.

Key Specifications

Pinout & Package

ADP5302ACPZ-2-R7 is housed in a 10-lead, 3 mm × 3 mm LFCSP package with exposed thermal pad (EPAD), rated for −40°C to +125°C junction temperature and optimized for low-inductance PCB layout and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultralow-quiescent-current buck regulator applications.

Compared with TPS62840DRVR and MAX17651ATB+T, the ADP5302ACPZ-2-R7 uniquely combines ultralow 240 nA hysteresis I_Q, factory-programmable VINOK monitoring, STOP pin for EMI control, and VID-based V_OUT flexibility - making it the only option supporting full battery voltage tracking and noise-aware power management in sub-3 V metering and medical wearables.

Availability

ADP5302ACPZ-2-R7 is available at Aetrix Electronics and suitable for energy metering, portable medical sensors, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADP5302ACPZ-2-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 worldwide and a legacy of precision power management innovation.

The ADP5302ACPZ-2-R7 belongs to Analog Devices' ultralow-power DC/DC regulator product line, engineered specifically for battery-constrained applications demanding multi-year operation, intelligent voltage monitoring, and adaptive noise control - such as smart utility infrastructure and clinical-grade wearables.

FAQ

What is the minimum input voltage required for ADP5302ACPZ-2-R7 to regulate output?

The ADP5302ACPZ-2-R7 operates down to 2.15 V input while regulating output, and continues functional operation down to 2.00 V (UVLO falling threshold). Below 2.00 V, the device shuts down to protect downstream circuitry. This 2.15 V minimum enables use with nearly depleted alkaline, NiMH, or Li-ion cells - critical for maximizing battery service life in remote metering applications where ADP5302ACPZ-2-R7 serves as the primary system regulator.

How does the STOP pin on ADP5302ACPZ-2-R7 differ from standard enable/disable control?

The STOP pin on ADP5302ACPZ-2-R7 provides asynchronous, nanosecond-scale switching disable (10 ns rise delay) without altering internal bias or regulator state - unlike the EN pin, which fully powers down the IC. This allows ADP5302ACPZ-2-R7 to instantly silence SW node activity during RF transmission or precision analog acquisition while retaining fast wake-up capability. The ADP5302ACPZ-2-R7 resumes regulation within 20 ns of STOP deassertion, making it uniquely suited for time-critical noise suppression where EN-based sequencing would introduce unacceptable latency.

Can ADP5302ACPZ-2-R7 be configured for a 1.2 V output, and how is accuracy maintained?

Yes, ADP5302ACPZ-2-R7 supports 1.2 V output via a 11.8 kΩ resistor from VID to AGND (per Table 5), or as a factory-fused option. In PWM mode, output accuracy is ±1.5% over −40°C to +125°C due to trimmed internal feedback divider and low-drift voltage reference. The ADP5302ACPZ-2-R7 achieves this without external resistors - minimizing temperature drift and board space - ensuring stable 1.2 V supply for low-voltage MCUs or memory interfaces across harsh environmental conditions.

What protection features are integrated into ADP5302ACPZ-2-R7?

ADP5302ACPZ-2-R7 integrates undervoltage lockout (UVLO), overcurrent protection (OCP) with cycle-by-cycle limiting (800–1200 mA in PWM mode), thermal shutdown (142°C threshold), and short-circuit protection with frequency foldback. It also includes quick output discharge (QOD) to safely bleed VOUT after shutdown. These protections operate independently of external components - ensuring robust operation in unattended field deployments where ADP5302ACPZ-2-R7 powers mission-critical metering or medical subsystems without supervision.

Is ADP5302ACPZ-2-R7 compatible with external clock synchronization, and what is the valid frequency range?

Yes, ADP5302ACPZ-2-R7 supports external clock synchronization via its multifunction SYNC/MODE pin, accepting input frequencies from 1.5 MHz to 2.5 MHz. The device automatically detects and locks to the external clock, eliminating beat frequencies and EMI peaks in sensitive environments. When the external clock stops, ADP5302ACPZ-2-R7 seamlessly reverts to its internal 2 MHz oscillator - ensuring uninterrupted regulation. This capability makes ADP5302ACPZ-2-R7 ideal for systems requiring deterministic switching timing, such as synchronized sensor arrays or EMC-compliant industrial controllers.